I've tried almost everything... =/
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Car: 85 Trans Am / 64 Chevy Nova
Engine: Turbocharged 355ci / 383ci
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I've tried almost everything... =/
Ok, I've been working on a turbo setup for my car for about 3 months now and I thought that it was going ok... however I still cannot get this piece of junk to run right! Here's my setup followed by the problems
Small Block 355 Chevy
T70 Turbo
38mm wastegate @ 5.83 psi
Mighty demon 750 blow thru
Summit 110gph boost pressurized fuel pump
Timing set at intervals of 2 between 10 and 20 (tried every combination, right now at 14*)
A mock up boost retard ignition system(retards timing by 10 degrees at boost)
Accel Shorty Plugs
Accel 8.8m wires
Problems:
Car makes a huge backfire a few seconds after shutdown
Car drives fine up until about 3500rpms than hesitates almost as if an RPM limiter was active...For some reason the car builds boost according to my boost gauge its just that the car isn't going anywhere, I can still shift it but up until what I'm guessing is the turbo kicking in and the secondaries on the carburetor opening up it runs fine, its just that when boost starts it becomes sluggish
Do you think an auto body place would be able to determine whats wrong? I've tried an exhaust place but they said no... Or perhaps one of your guys insight would be able to help me?
Thanks alot I appreciate any info
Jim
Small Block 355 Chevy
T70 Turbo
38mm wastegate @ 5.83 psi
Mighty demon 750 blow thru
Summit 110gph boost pressurized fuel pump
Timing set at intervals of 2 between 10 and 20 (tried every combination, right now at 14*)
A mock up boost retard ignition system(retards timing by 10 degrees at boost)
Accel Shorty Plugs
Accel 8.8m wires
Problems:
Car makes a huge backfire a few seconds after shutdown
Car drives fine up until about 3500rpms than hesitates almost as if an RPM limiter was active...For some reason the car builds boost according to my boost gauge its just that the car isn't going anywhere, I can still shift it but up until what I'm guessing is the turbo kicking in and the secondaries on the carburetor opening up it runs fine, its just that when boost starts it becomes sluggish
Do you think an auto body place would be able to determine whats wrong? I've tried an exhaust place but they said no... Or perhaps one of your guys insight would be able to help me?
Thanks alot I appreciate any info
Jim
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Car: 1987 Z28
Engine: 2005 5.3L, LS6 Cam
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Re: I've tried almost everything... =/
That wastegate seems kinda small? I use a 50mm, and was told with my setup dont go smaller then a 50mm with my low boost levels.
Are you running 14* timing wot at 5.8psi? I am running like 19-20* on 7PSI and thats still WAY to low.
Try giving the car some more timing.
Jay
Are you running 14* timing wot at 5.8psi? I am running like 19-20* on 7PSI and thats still WAY to low.
Try giving the car some more timing.
Jay
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Re: I've tried almost everything... =/
I dont think the wastegate is the problem cause it is venting properly and controlling the boost, no spiking or compressor surging or anything
and i mean 14* at idle, too be honest I dont know how to get a timing reading at WOT or under boost cuz the car only makes boost while driving
and i mean 14* at idle, too be honest I dont know how to get a timing reading at WOT or under boost cuz the car only makes boost while driving
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Re: I've tried almost everything... =/
Mines a bit different as i am EFI, but what I do is when I see boost 3800+ (WOT) i dropped my timing. so when my MAP see's 90-100KPA(1 bar) my timing drops from 40ish down to 20 (ramps down slowly till 4000 and stays pretty steady)
Also maybe you should get a wideband on the car so you can make sure your getting the right fueling. Maybe its leaning out?
Jay
Also maybe you should get a wideband on the car so you can make sure your getting the right fueling. Maybe its leaning out?
Jay
Last edited by Jay_rich; 07-10-2009 at 08:51 PM.
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Engine: 3xx ci tubo
Transmission: 4L60E & 4L80E
Re: I've tried almost everything... =/
Small Block 355 Chevy
T70 Turbo
38mm wastegate @ 5.83 psi
Mighty demon 750 blow thru
Summit 110gph boost pressurized fuel pump
Timing set at intervals of 2 between 10 and 20 (tried every combination, right now at 14*)
A mock up boost retard ignition system(retards timing by 10 degrees at boost)
Accel Shorty Plugs
Accel 8.8m wires
Problems:
Car makes a huge backfire a few seconds after shutdown
T70 Turbo
38mm wastegate @ 5.83 psi
Mighty demon 750 blow thru
Summit 110gph boost pressurized fuel pump
Timing set at intervals of 2 between 10 and 20 (tried every combination, right now at 14*)
A mock up boost retard ignition system(retards timing by 10 degrees at boost)
Accel Shorty Plugs
Accel 8.8m wires
Problems:
Car makes a huge backfire a few seconds after shutdown
Car drives fine up until about 3500rpms than hesitates almost as if an RPM limiter was active...For some reason the car builds boost according to my boost gauge its just that the car isn't going anywhere, I can still shift it but up until what I'm guessing is the turbo kicking in and the secondaries on the carburetor opening up it runs fine, its just that when boost starts it becomes sluggish
Did you install the D1941 module and switch? If so, have you tested that it retards by 10*? If you did and it is set up right then you can run your distributor as normal in terms of timing. That is set the base timing to 8* or what ever is best. Then about 40* during cruise from the mechanical advance and vacuum can. Under WOT boost the vacuum advance is zero so you will see your base+mechanical-retard which should be something like 8+14-10 = 22 - 10 = 12*. If you want more you could bump up the base timing a little.
Only fast easy way to check all this is with a timing light and Wideband O2 sensor. Two tuning tools I swear by.
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Re: I've tried almost everything... =/
if u didnt notice but no car manufacturer for the last 20+ years uses a carb.
I own 2 turbo cars so how is my advice worst than someone who doesnt even own/race a turbo car like yourself???
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Engine: 3xx ci tubo
Transmission: 4L60E & 4L80E
Re: I've tried almost everything... =/
That is an extreme case that most don't care about when trying to make boosted HP. Most are just looking for something good and fun. A carb. can do quite well under most conditions when tuned properly.
Notice he is using a "T70 turbo". That is a an Ebay T70 so you know this is a low budget build. I am all for low budget turbo builds. For under $1000 a cheap carbed, T70, mechanical dizzy setup can acheive 500-600 FWHP. Try to do that NA for under $1000........won't happen. Try 3-5 times that dollar amount.
So, I would spend $50 on a Holley jet kit and plan a weekend of tuning. Find a friend with a WBO2 sensor. Or better yet.......go to www.14point7.com and buy a WBO2 controller for $50 and the $60 WBO2 sensor. Put the stuff together and you have a WBO2 sensor for under $120 that you can use on anything and use a laptop PC to record. You could go without the laptop and get the display for $40 I think.
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Re: I've tried almost everything... =/
the d1941 retards proportionally, that is i tested it without using the hobbs switch and at 14* it retards it to about 6-7* and at 20* it retards to about 9-10*
also i screwed with the link on the carburetor to make it one to one, that is the secondaries open the same with the primaries
I actually retarded the idle timing to 10* and its running a hell of alot better, that is with proper tuning, i made it a little more leaner than the ridiculously rich condition it was at
btw the carb is mech secondary double pumper
also i screwed with the link on the carburetor to make it one to one, that is the secondaries open the same with the primaries
I actually retarded the idle timing to 10* and its running a hell of alot better, that is with proper tuning, i made it a little more leaner than the ridiculously rich condition it was at
btw the carb is mech secondary double pumper
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Re: I've tried almost everything... =/
That is good that it is a mech. double pumper.
It sounds like you are getting the hang of it. It also sounds like it was overly rich. As you lean it out keep an eye on detonation. Although, you are not running a lot of timing right now so that is in your favor.
Overall, it sounded like it was overly rich causing the bog and as lean it out it will rev quicker. Without a WBO2 I would keep an eye on the spark plugs.
Those D1941 modules come in handy for a cheap NOS and boost timing retard setup. They also work good if you run a lot of base timing. You can add a toggle switch with one side to ground and the other to the D1941 input. Suppose you have your timing advanced a lot and the starter won't crank the engine........you fill the toggle switch to retard 10* and then it starts easier. Once running you flip the switch back to add in 10*.
It sounds like you are getting the hang of it. It also sounds like it was overly rich. As you lean it out keep an eye on detonation. Although, you are not running a lot of timing right now so that is in your favor.
Overall, it sounded like it was overly rich causing the bog and as lean it out it will rev quicker. Without a WBO2 I would keep an eye on the spark plugs.
Those D1941 modules come in handy for a cheap NOS and boost timing retard setup. They also work good if you run a lot of base timing. You can add a toggle switch with one side to ground and the other to the D1941 input. Suppose you have your timing advanced a lot and the starter won't crank the engine........you fill the toggle switch to retard 10* and then it starts easier. Once running you flip the switch back to add in 10*.
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Car: 85 Trans Am / 64 Chevy Nova
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Re: I've tried almost everything... =/
That is good that it is a mech. double pumper.
It sounds like you are getting the hang of it. It also sounds like it was overly rich. As you lean it out keep an eye on detonation. Although, you are not running a lot of timing right now so that is in your favor.
Overall, it sounded like it was overly rich causing the bog and as lean it out it will rev quicker. Without a WBO2 I would keep an eye on the spark plugs.
Those D1941 modules come in handy for a cheap NOS and boost timing retard setup. They also work good if you run a lot of base timing. You can add a toggle switch with one side to ground and the other to the D1941 input. Suppose you have your timing advanced a lot and the starter won't crank the engine........you fill the toggle switch to retard 10* and then it starts easier. Once running you flip the switch back to add in 10*.
It sounds like you are getting the hang of it. It also sounds like it was overly rich. As you lean it out keep an eye on detonation. Although, you are not running a lot of timing right now so that is in your favor.
Overall, it sounded like it was overly rich causing the bog and as lean it out it will rev quicker. Without a WBO2 I would keep an eye on the spark plugs.
Those D1941 modules come in handy for a cheap NOS and boost timing retard setup. They also work good if you run a lot of base timing. You can add a toggle switch with one side to ground and the other to the D1941 input. Suppose you have your timing advanced a lot and the starter won't crank the engine........you fill the toggle switch to retard 10* and then it starts easier. Once running you flip the switch back to add in 10*.
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Re: I've tried almost everything... =/
The WBO2 on that site does not require an ECU. You can just read the display. All that is needed is the LSU 4.2 WBO2 sensor, a 5 amp fuse, and wiring.
If you use a stock NBO2 (narrow band) it will not read the AFR accurate like a WBO2 would. You would need a gauge to read the NBO2 sensor. No ECU necessary. This setup is not that good though because it is not accurate at reading the AFR. The NBO2 will only say rich or lean, not how rich or how lean. Right now you know you are rich so it wouldn't tell you much.
The WBO2 is accurate at reading the AFR. If I was in your situation I would keep checking the spark plugs and not run a NBO2 with gauge because it won't help much.
If you use a stock NBO2 (narrow band) it will not read the AFR accurate like a WBO2 would. You would need a gauge to read the NBO2 sensor. No ECU necessary. This setup is not that good though because it is not accurate at reading the AFR. The NBO2 will only say rich or lean, not how rich or how lean. Right now you know you are rich so it wouldn't tell you much.
The WBO2 is accurate at reading the AFR. If I was in your situation I would keep checking the spark plugs and not run a NBO2 with gauge because it won't help much.
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Re: I've tried almost everything... =/
taking the spark plugs out requires me to dissassemble the entire turbo setup btw, do you think i could get away with a decent narrowband afr gauge? such as http://www.summitracing.com/parts/ATM-7375/?image=large
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Engine: 3xx ci tubo
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Re: I've tried almost everything... =/
I am not sure what to say. I always use a WBO2, but I do compare it against my NBO2 logs. Usually a NBO2 around .8 volts is in the 11-12 AFR range but it varies.
Be very careful if using just the NBO2. The cost is about $80 and a NBO2 is about $30. I think the Innovate LC-1 WBO2 setup is $200, but I am not sure if that comes with a sensor.
Maybe try ebay for a used NBO2 gauge. I just can't see spending $80 on an item that is not that useful.
Be very careful if using just the NBO2. The cost is about $80 and a NBO2 is about $30. I think the Innovate LC-1 WBO2 setup is $200, but I am not sure if that comes with a sensor.
Maybe try ebay for a used NBO2 gauge. I just can't see spending $80 on an item that is not that useful.
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Re: I've tried almost everything... =/
yeah it comes with an o2 sensor but thats really pricy im already almost 400 over budget on my project lol
i can prolly get one of those "jdm" air fuel ratio gauges on ebay just to mess around with for the time being... they are 30 bucks... if i dont like the results ill have to "borrow" the wideband from my friends turbo altima
i can prolly get one of those "jdm" air fuel ratio gauges on ebay just to mess around with for the time being... they are 30 bucks... if i dont like the results ill have to "borrow" the wideband from my friends turbo altima
#18
Re: I've tried almost everything... =/
When that motor was put together was the cam set straight up or advanced? Was that motor running right before the turbo, or was it put together along with the turbo setup. Im dont know too much about carbs, but from what u said, sounds like your getting enough fuel.
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Re: I've tried almost everything... =/
motor wasnt exactly put together lol it was taken out of a blazer its a gmpp 350 that the only mod was bored out thats about it and yeah i ran it for about 2 years b4 the turbo and it ran great... it also runs great without the turbo hooked up, just using the carb feeding in n/a
im going to autozone tomo to pick up a cheap sunpro afr gauge and a bosch o2 sensor...hopefully itll be decent i mean itll prob read all the way in the right red zone cuz i have the screws to the point they are about to fall out of the carburetor
im going to autozone tomo to pick up a cheap sunpro afr gauge and a bosch o2 sensor...hopefully itll be decent i mean itll prob read all the way in the right red zone cuz i have the screws to the point they are about to fall out of the carburetor
Last edited by gibsongod716; 07-11-2009 at 09:00 PM.
#20
Re: I've tried almost everything... =/
almost sound like a boost referencing problem. just a stupid question you ever try setting the boost a bit higher see if the problem starts subsiding
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Re: I've tried almost everything... =/
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#22
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Re: I've tried almost everything... =/
As soon as I read that that's what I thought, I'm using a carb because I cant afford some $2000+ setup, injectors, electronic gizmos and stuff for an efi setup.
And TTROC I took off the boost controller and it seems to be doing alot better now too, I been using one of them ebay boost controllers, and maybe they are just pieces of garbage. So than I turned the screw out on the boost controller and it spiked through the roof, I'm probably gonna end up with an EBC from summit or something.
Maybe Ill throw the 15 pound spring in there, see how the stock motor likes that guy
And TTROC I took off the boost controller and it seems to be doing alot better now too, I been using one of them ebay boost controllers, and maybe they are just pieces of garbage. So than I turned the screw out on the boost controller and it spiked through the roof, I'm probably gonna end up with an EBC from summit or something.
Maybe Ill throw the 15 pound spring in there, see how the stock motor likes that guy
#23
Re: I've tried almost everything... =/
ok when you do swap the springs lets us know what the out come is.
And honestly i think the best boost controller is a 5 valve from home depot or lowes from the plumbing section
And honestly i think the best boost controller is a 5 valve from home depot or lowes from the plumbing section
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Re: I've tried almost everything... =/
I had a similar problem with a similar motor in my Malibu. In my case it was the design of the carb hat that was at fault. Boost blew across the bowl vents, sucking fuel out and down the carb throat, causing a severe rich condition. I tied the bowl vents together with a piece of fuel proof hose with a cutout at the top & gained great drivability & 100hp. Good luck, Mark
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Re: I've tried almost everything... =/
HMMMMMM.... I'm using Spectres carburetor hat...
http://www.summitracing.com/parts/SPE-9843/
I wonder if this thing is causing the problem cause its not necessarily made for turbo applications
Can you explain what you mean by tying the vents down? Did you tee the two of them together and cut a hole in the hose so that boost couldn't suck fuel out?
http://www.summitracing.com/parts/SPE-9843/
I wonder if this thing is causing the problem cause its not necessarily made for turbo applications
Can you explain what you mean by tying the vents down? Did you tee the two of them together and cut a hole in the hose so that boost couldn't suck fuel out?
Last edited by gibsongod716; 07-12-2009 at 07:38 PM.
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Re: I've tried almost everything... =/
I just hooked a length of fuel hose to both vents and then made a slit across the top of the hose. Yes I guess you could hook a short piece of hose to each vent then hook them together with a T fitting & leave the other end of the T open. Mark
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Re: I've tried almost everything... =/
That's not a bad idea at all, I'll add that to the list of things to try
So I'm gonna swap out the springs
Hook up the AFR gauge to get a reading
Tie off the Bowl Vents
Tune the jets and maybe reset the fuel bowls
Hopefully this goes good and I can get a video or something, does anyone else car start to burn out around 3000 rpms out of no where?
So I'm gonna swap out the springs
Hook up the AFR gauge to get a reading
Tie off the Bowl Vents
Tune the jets and maybe reset the fuel bowls
Hopefully this goes good and I can get a video or something, does anyone else car start to burn out around 3000 rpms out of no where?
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Re: I've tried almost everything... =/
Something else to consider is your plug gap, didnt mention where is is set but definately something to double check while your checking everything over.
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Re: I've tried almost everything... =/
running even worse now... when I floor it it stalls out
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Re: I've tried almost everything... =/
you need to tighten that plug gap up, youre not running crazy boost numbers but still should probably be around .025", you wanna tighten it up to prevent boost blowing out the spark. good luck
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Re: I've tried almost everything... =/
I know you're not running a ton of boost but are you just running a stock HEI ignition? I had a 8.5:1 blower motor and we started having problems with the iginition at under 10 pounds of boost that were similar to what you're describing. A 6AL fixed everything.
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Axle/Gears: 3.45 / 4.11
Re: I've tried almost everything... =/
It just feels like its dumping the fuel in and boom stall kinda like it wants to do it but than just fails...
I did the Bowl Vent mock up thing, hooked up my gauge which says Im ridiculously still rich
just for kicks I'm gonna try and take it around the block without the carb hat on, see if its a turbo problem or a carburetor problem
tomo ill regap the plugs to .25 and astro did you just get the 6AL or did you have to get a new distributor and all that stuff
I did the Bowl Vent mock up thing, hooked up my gauge which says Im ridiculously still rich
just for kicks I'm gonna try and take it around the block without the carb hat on, see if its a turbo problem or a carburetor problem
tomo ill regap the plugs to .25 and astro did you just get the 6AL or did you have to get a new distributor and all that stuff
#35
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Car: 91 camaro rs
Engine: 355, blowthru, 78mm turbo
Transmission: th350, art carr converter
Axle/Gears: stock 7.5, 3.23s, minispool
Re: I've tried almost everything... =/
i run a msd 6al w/ btm, with a msd pro billet distributor locked, using the btm to lower timing under boost, and havent had any spark related problems or what its worth. also run two steps colder spark plugs gapped @ .025"
that stuffs expensive but its worth it when youre standing over your car in the garage wondering what is wrong...
that stuffs expensive but its worth it when youre standing over your car in the garage wondering what is wrong...
#36
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Car: 85 Trans Am / 64 Chevy Nova
Engine: Turbocharged 355ci / 383ci
Transmission: WC T-5 / T10
Axle/Gears: 3.45 / 4.11
Re: I've tried almost everything... =/
I have to run shortys so Im limited on the heat range of the plugs but Im gonna gap em to .25 like you suggested, I also ordered a more powerful Ignition Coil Upgrade Package 55,000v (coil cap rotor and wiring) for added fuel burning to hopefully stop the backfiring.
HOPEFULLY, the problem was the plug gap and the spark getting blown out, I mean I had to take the whole turbo setup apart just to get the plugs out so I might as well do a quick check on everything. So far the pressurized fittings on the fuel pump are still secure, the wastegate piping was filled with water(my fault I had to hose off the motor) thank god I didnt run it like that.
If it turns out not to be the plug gaps and the coil doesnt do anything, is there anything I can try?
update: apparently one the spark plugs is cracked right down the center, and was half bent Im guessing from rubbing into the manifold...
HOPEFULLY, the problem was the plug gap and the spark getting blown out, I mean I had to take the whole turbo setup apart just to get the plugs out so I might as well do a quick check on everything. So far the pressurized fittings on the fuel pump are still secure, the wastegate piping was filled with water(my fault I had to hose off the motor) thank god I didnt run it like that.
If it turns out not to be the plug gaps and the coil doesnt do anything, is there anything I can try?
update: apparently one the spark plugs is cracked right down the center, and was half bent Im guessing from rubbing into the manifold...
Last edited by gibsongod716; 07-14-2009 at 03:45 PM.
#38
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Car: 85 Trans Am / 64 Chevy Nova
Engine: Turbocharged 355ci / 383ci
Transmission: WC T-5 / T10
Axle/Gears: 3.45 / 4.11
Re: I've tried almost everything... =/
I shoulda ordered overnight shipping lol, I'm waiting for my parts to come today, I will intsall later and update...
Apparently the spark plug was arcing against the manifold... putting a decent amount of voltage into my headers lol, thats probably what made the first fire
![idiot](https://www.thirdgen.org/forums/images/smilies/idiot.gif)
#39
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Car: 85 Trans Am / 64 Chevy Nova
Engine: Turbocharged 355ci / 383ci
Transmission: WC T-5 / T10
Axle/Gears: 3.45 / 4.11
Re: I've tried almost everything... =/
GUESS WHAT!
Still doesnt work lol
Im scrapping the whole system I give up, Ive spent almost two grand already and its still running like a pos.
I'm gonna save up and get this bad boy
http://www.summitracing.com/parts/PFS-70026/
Self tuning =D, comes with 2.5 Bar Map Sensor good for 20 lbs of boost, 220lph fuel pump, boost pressure fuel pressure regulator, ecm, 4 60 lb injectors, wideband o2 sensor, plus its all contained inside the throttle body itself, no bulky mess or anything like that
Still doesnt work lol
Im scrapping the whole system I give up, Ive spent almost two grand already and its still running like a pos.
I'm gonna save up and get this bad boy
http://www.summitracing.com/parts/PFS-70026/
Self tuning =D, comes with 2.5 Bar Map Sensor good for 20 lbs of boost, 220lph fuel pump, boost pressure fuel pressure regulator, ecm, 4 60 lb injectors, wideband o2 sensor, plus its all contained inside the throttle body itself, no bulky mess or anything like that
Last edited by gibsongod716; 07-18-2009 at 04:16 PM.
#40
Re: I've tried almost everything... =/
It's highly doubtful that is the wastegate. I run two 38mm TIAL Wastegates and on my lowest setting I am making 600 rear hp and on the high setting 850 rear hp at 9-18#s boost..my car drives as good as a stock car.
I also highly doubt that your spark is being blown out with the amount of boost your are running. I ran 18#s using NGK TR6 Plugs gapped at .034". Everything was/is fine. With FI you have to make sure the tune is good.
Have you hooked it up to a wideband or put it on a dyno to see what your afr is?
Running like **** has to do with air, fuel, and spark...granted all of the mechanical things...which you have stated did.
I also highly doubt that your spark is being blown out with the amount of boost your are running. I ran 18#s using NGK TR6 Plugs gapped at .034". Everything was/is fine. With FI you have to make sure the tune is good.
Have you hooked it up to a wideband or put it on a dyno to see what your afr is?
Running like **** has to do with air, fuel, and spark...granted all of the mechanical things...which you have stated did.
Last edited by Shinobi'sZ; 07-18-2009 at 05:28 PM.
#41
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Car: 85 Trans Am / 64 Chevy Nova
Engine: Turbocharged 355ci / 383ci
Transmission: WC T-5 / T10
Axle/Gears: 3.45 / 4.11
Re: I've tried almost everything... =/
I mean I suppose a dyno would have a wideband o2 sensor they can put on to check the air fuel ratio and all that but honestly I cant even drive it down the block so getting it to a dyno would be a challenge...
I drove it down the block today and I think I narrowed the problem down to its running out of fuel cause I managed to rev the **** out of it and it ended up stalling and than not cranking until I pumped more fuel into the carburetor, so could it be possible the problem lies in the carburetor and that the fuel isnt moving from the bowls into the engine properly?
After a little searching it turns out you can get a simple wideband AFR gauge, controller and bosch for about $150, which I guess I will pick up
I'm also gonna go with an electric fuel pump and boost fuel pressure regulator
And for added tuning a complete jet assortment
The jets for my carb are 75's for primaries, and 83's for secondaries, any suggestions on what to up them too?
I drove it down the block today and I think I narrowed the problem down to its running out of fuel cause I managed to rev the **** out of it and it ended up stalling and than not cranking until I pumped more fuel into the carburetor, so could it be possible the problem lies in the carburetor and that the fuel isnt moving from the bowls into the engine properly?
After a little searching it turns out you can get a simple wideband AFR gauge, controller and bosch for about $150, which I guess I will pick up
I'm also gonna go with an electric fuel pump and boost fuel pressure regulator
And for added tuning a complete jet assortment
The jets for my carb are 75's for primaries, and 83's for secondaries, any suggestions on what to up them too?
Last edited by gibsongod716; 07-19-2009 at 10:05 AM.
#44
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Car: 85 Trans Am / 64 Chevy Nova
Engine: Turbocharged 355ci / 383ci
Transmission: WC T-5 / T10
Axle/Gears: 3.45 / 4.11