camaroracer1992

im gonna put a 8-71 blower on my rs in abotu october with 2 600 cfm carbs and about 10 psi boost i want. does anyone have pictures of a 3rd gen with a blower sticking out of the hood? i wanna see what my car would look like.

89305RS

i see that you have a 355 worked!!! Just remember compression is boosts worst enemy. I personally like the cintrifugal blowers myself BUT a roots style sticking out of a thirdgen hood screams dont F**K with me. I think it would look OK with one.

xpndbl3

iTrader: (5)

flrtn1 has a blower on his thirdgen.

88 350 tpi formula

iTrader: (9)

there arn't too many pictures I know I have found a few in the past using the search but, still was a bit of work. If my car was a reg. firebird or a tbi model there would be one on it still may someday though

flrtin1

Yes I do

xpndbl3

iTrader: (5)

haha i figured it would only be a matter of time before you posted, the names steve by the way there flirtn i'll see you saturday for sure. i'll be trailering the camaro behind a beat up suburban.

flrtin1

Ya I just can't help myself
I will be trailering to dennys early then driving to bennigans and joining the caravan. Got the car almost clean from the winter storage, hope the weather clears up we had another rough night last night
Shawn


Sorry camaroracer1992 to get off topic

xpndbl3

iTrader: (5)

i might skip the caravan due to having to possibly trailer two "street" cars to this gathering i haven't had time to tune my carb setup or get it to idle properly for me to drive it from the south side with the caravan. But glad to see you're getting there early too. that's the plan for me as well, plus i told denny that i'd help him out with things around his house as well before people start showing up.

camaroracer1992

My motor has 9:1 compression, i dont care if i have to run 100 octane in it with the prices of gas these days i only take it to shows and hte drag strip once in a while anyway woudl that be too much for say 10 lbs boost? with how my motor is built in the sig? flirtn what kind of compression/boost are you running?

flrtin1

I have 7.5:1 with 9lbs boost
I assume you have forged pistons.... if so with good gas and keeping a eye on your timing I think you would be ok up to 6lbs IMO anything over that is getting close to the edge. With 9:1 and 10lbs that puts you at 15.1:1 Effective Compression.
6lbs and 9:1 puts you at 12.7:1 Effective Compression

camaroracer1992

ive got eagle crank, rods (all the good stuff), JE custom forged nitrous pistons, world productys heads that are O ringed along with the block, copper head gaskets, splayed 4 bolt block. 9:1 compression
now my cam is a 236@.050 solid lifter (110 LSA) with .495 lift should i be ok with this running the approx 10 lbs boost? also how difficult is it to tune this when its all together. do you have AOL IM, my screen name is camaroracer1992 id be interested in talking to you. thansk an awful lot nobody i know has a blower

Mark305TBI

You also have the cleanest garage in existance.

88Camaro350

The car and garage are awesome. That tile is sweet...don't have to worry about oil/gas/antifreeze/ ect staining it.

Now that I have seen that car I do believe I am gonna keep my car 2 tone. It looks really good. I may spray the inside of my headlight area black to.

BTW what kinda times does that thing run? And what kinda suspension do you have to make it ride that low?

CamaroPimp

:hail: :hail: :hail:OOOOOO AAAAHHHH OOOOOO:hail: :hail: :hail:

85berlinetta2.8

blown 83

iTrader: (1)

I know this pic is not of the engine in the car but it is a pic of my 8-71 blown 355. Sorry I don't have a pic of it in the car. It is ready to go back in as soon as I can get some time.

On the subject of boost limits that someone mentioned earlier. This engine is not O-ringed, but has the Fel-pro gaskets that have the copper ring around the cyclinder for high compression or boost that BDS recomended for anything that sees the street. I actually had a set of copper gaskets ready to go in but changed my mind with their recomendation. I am running a 7.8:1 comp ratio and a 110 deg lobe sep w/ 266/276 @.050 and .656/.672 lift. How much boost do you think it would safely take without pushing out a head gasket on race gas. On 98 octane I will stay with 9-10pounds but I was thinking mabey with a pulley swap I could try up to 15 pounds. Any way I hope the pic helps your decition to go with a 8-71. I love every time I look at it.

blown 83

iTrader: (1)

I know this pic is not of the engine in the car but it is a pic of my 8-71 blown 355. Sorry I don't have a pic of it in the car. It is ready to go back in as soon as I can get some time.

On the subject of boost limits that someone mentioned earlier. This engine is not O-ringed, but has the Fel-pro gaskets that have the copper ring around the cyclinder for high compression or boost that BDS recomended for anything that sees the street. I actually had a set of copper gaskets ready to go in but changed my mind with their recomendation. I am running a 7.8:1 comp ratio and a 110 deg lobe sep w/ 266/276 @.050 and .656/.672 lift. How much boost do you think it would safely take without pushing out a head gasket on race gas. On 98 octane I will stay with 9-10pounds but I was thinking mabey with a pulley swap I could try up to 15 pounds. Any way I hope the pic helps your decition to go with a 8-71. I love it every time I look at it.

blown 83

iTrader: (1)

another

blown 83

iTrader: (1)

sorry about the double post above. I think the pic was too large before so I tried it again. I am new to this pic stuff. leave me in the gargage and I'm fine, but anything to do with computers I am pretty bad. my apologies

camaroracer1992

wow thats sweet!!!!! thats what i want mine to look like
mines o ringed and has 9:1 with the 236/ .512 lift cam. I think i can get away with 10 lbs boost on 100 octane

flrtin1

camaroracer1992 with an Effective Compression Ratio of 15:1 you are going to need a lot more than 100 octane fuel I would suggest taking it a little slower right off the bat because these engines are not forgiving of any type of detonation

Ask me how I know!
this is a forged piston with less than 3 seconds of high boost not enough octane detonation

camaroracer1992

wow, ok well the WEIAND kits come from the factory with about 5-8 psi correct?
1. would i notice that diff on the motor
2. would that be ok with 100 octane?

flrtin1

Sorry, I didn't answer your question about IM I don't have it
If I read #1 right you are asking if you will notice a power gain with lets say 6lbs of boost on a 9:1 355 with a 8-71..... lol you will think you died and went to car heaven
on #2.... 6lbs of boost would put you about 12.7:1 Effective Compression which is slightly higher than I run and I can run 94 octane with no problems
now with that said every setup will run differently, with your porting and (you didn't say runner CC's) this will affect the amout of actuall boost that you wind up with
also I see you said october for install time, another thing to watch is air temp. The piston I posted was doing fine with my fuel mixture (had a diff setup was running more boost than now) in the warm summer air but I must have been on the edge becuse the first 50 degree night in the fall was when I did that IE: cold more dense air makes a bigger diff on a blown engine than on a N/A engine so if your just getting started when it is cold out keep you octane as high as you can (and stay on the rich side) till you figure out where you are at

oh ya this link has a lot of good general info Link

Motor City Mike

Check out the video in my sig line to see mine in action.

camaroracer1992

heads are 72 cc chambers and have 210 cc intake runners and the heads have some more bowl work done to them also. they have manley heavy duty valves in them. oh another thing is that cam that i have can i keep that or do i have to get a different one, i really dont feel liek tearing into the motor that much to chang out the cams since i have just put that one in not too long ago.

camaroracer1992

motor city mike thats insane!!!!! i love that car!!!!

camaroracer1992

oh i forgot to add, I am going to be putting a Superchiller on it also (intercooler) so i think that should help with the heat/detonation of it as long as my carbs are jetted higher. It states for a 8-71 i should use 2 750 cfm carbs where as a 6-71 should use 2 600 cfm carbs, with these large of carbs on it shoudl i have throttle response problems?

flrtin1

Now your talkin, with the intercooler you should be able to run 10lbs boost but I have never delt with them. Be nice to have but big $$ plus the added hieght maybe someone with intercooler knowledge can jump in here?

Motor City Mike

FWIW, my engine has about 7.8:1 CR, makes around 10 pounds of boost and runs on 92 octane gas with no issues (not o-ringed). It does have aluminum heads which also helps to allow me to run this configuration on pump gas. It made a little over 800 hp on the dyno. It has 2 900 cfm carbs, but then again, it's a 509" big block.

I'd go with 2 750 cfm carbs for a SBC using a 6-71 or 8-71 blower, which should be easily good for making 700+ hp. Bigger carb and intake port size won't kill your throttle response on a supercharged engine, unlike a normally aspirated set-up. Any restriction in the inlet tract will only limit the amount of air/fuel to be forced into the cylinders, and thereby limit your power output. I also recommend mech. secondary carbs. I leave my car in 3rd gear (manual valve body) when driving on the street, and can spin the 15" wide cheater slicks at the hit of the throttle - how's that for throttle response?

The Superchiller will allow you to make significantly more power, but you'll have to fab up a stand alone cooling system for it, which may not be feasible for street use. They are very popular for use in boats since they have all the available cool water around they can use. It will also raise your supercharger a good 3" higher.

flrtin1

Motor City Mike, awsome video nothin like a lot of cubes with boost thrown for good measure :hail:

camaroracer1992 sorry about the short posts been trying to get everything ready for third gen fest tomorrow nothin left but the drive now wooohooo.
Anyway I am running two 500 cfm carter competition series carbs. on a 305 (not o-ringed) since 86 with no problems like mike said tho its always better to go bigger with the fuel it wont hurt you. I can walk the car sideways (street tires) at will between 25 and 30 with the 5 speed and 3.23 gears

Here is a short video from a couple of years ago my wife drops the camera and is yelling at me because both the kids are in the car with us Video

camaroracer1992

sweet man thats awesome!!!! i cant wait to put the blower on. i may skip the intercooler, that may be a pain in the rear, but do you think 6 psi boost would be good for me on pump gas? (94) or maybe a 50/50 ratio with 100 octane?

flrtin1

I would try to keep your octane on the high side till you make sure you have all the bugs worked out like I said every setup is different so its hard to say where your "safe" octane level is going to be. I would recommend getting the MSD Adjustable Spark Timing Control and a rev limiter if you don't already have one

THEGENERAL

wow awsome video man .....what was that guy thinking in the horizon next to ya there ...LMAO

camaroracer1992

ok my blower will be ordered in sept abouts for installation. I have already picked out my mallory ignition for it that i want to install. the car is getting repainted this winter and also some interior work done to it. id like to put a t56 6 speed in it, but i dont know if thatd be alot of work or not, i may jsut stick with the 700r4