Will I be running 12.99 or below with my planned setup?

GMPP 350 H.O.
Ported & polished upper
AS&M si-runners
ported accell base
dynomax 1 & 5/8 headers
catco cats (staying duals, its cool)
dynomax catback (turbo! muffler)
2800 stall tc
3.73 posi rear
moderate weight reduction (shed 200-300lbs)
& of course the right suspension

I have even faniced runningmid 12's with this setup, as the 3.73's and 2800 tc will make a huge difference off the line given I can hook it all up. This is a good setup for a budget too, not all extravagant.

 

What heads does that motor use, and what cam? Your setup doesn't look much different than mine (of couse, that's because I don't know what heads/cam you have), and if it is similar to mine, you won't be anywhere near the 12s. Unless that's got damn good heads and a corresponding cam, I don't see 12s from that combo.

 

no? I will look further into the valvetrain details on the H.O.
I thought it was a smidge better than an L98?

 

It probably is, but being a smidge better than a high 14/low 15 second car doesn't make you a 12 second car.

 

GMHTP ran like 12.9 with a ported base/slp runners with a cam and Trick Flow heads.

Just something more to think about.

 

One of our members 88 Formula 350 runs 13.93's consitant, and his tires were breaking lose the whole time right into third. No head work, or cam. Just sphon LCA, relocation brackets, accel coil and wires, SLP CAI. No port polish work, stock runners etc. Mind you where you are running will have an effect on times depending on how close you are to sea level etc. But we are going to our local dragstrip next weekend, as he has now added a corvette servo, and some Khumo estacy tires that eh hope swill get him some better traction, and maybe get him a mid 13 sec run. We will jsut have to wait and see next weekend how these mods effect his times??

 

What was his trap speed?

 

Trick flow heads are a whole lot different than the stock heads that come with most GM crate motors... that's why I asked what heads he has.

If he's got the motor that came with Vortecs, or if he's got the ZZ4 with the 113 heads, that's a whole lot different than their generic block that comes with junk smogger heads.

 

I am not sure what heads or cam you are using but the combination that you listed does have potential if you have the correct heads and cam. With my vette I had trick flow heads and a ZZ-9 cam with headers and Arizona Speed and Marine large tube runners. All other components were similar to yours and I ran 12.69 at 106.5 MPH. I think it is possible to run 12.99 with your combination.

 

13.93 @ 99.32 mph. I am not sure the 60" etc. as I don't have any of his slips.

 

It should run High12s at least, I ran 13.11 with alot less stuff then he has!! Most of you guys here must be doing something wrong is all I can say if you dont think that combo cant run high 12s. Go for it Dude, prove them wrong like I have!!

 

Unless we know what heads & cam he has, nobody's opinion is worth a damn. Go slap a pair of smogger heads and an LG4 cam on that motor and it'll be lucky to run 16s. Put some AFRs, a good cam, and an induction system that can feed it, and it'll easily see low 12s. So to say that it should run 12s without knowing what heads & cam he has is just plain ignorant.

 

Well, the 350 H.O. is totally assembled. So I won't be changing the heads or cam on it for quite some time, due to money.
(I don't have any )

350 H.O.

Cam (dual pattern)
.435 in. intake/.460 in. exhaust lift with 212 degrees intake/222 degrees exhaust duration at .050 in. lift

Heads (cast iron)
64cc Vortecs

The reason I'm figuring 12.99 is because the Vortec heads with the LTR setup are going to produce a whole lot of torque!

GM rates the H.O. (non deluxe) at 330hp and 380tq - this is carb'd. With a breathed over LTR setup I think I can see better numbers than that. Don't forget the 3.73's and 2800TC either! (very important)

 

You'll see better torque numbers but I would guess you wouldn't see much past that on the HP side.

12.99 is very possible where you are now... however Let's see your 60ft times under 2seconds first

 

HAHA!! Well considering it is a 90 Iroc I assumed it had stock heads and Cam. So I think it should sneak into the 12s!! Goes along with all the other guess's people throw out here that have never even had a car down the track and dont have a clue what they are talking about. So I was just trying to fit in. LOL

 

You're going to need some drag radials too in order to take advantage of those gears and a torque converter.
I personally think you'll be a few tenths off but you never know.

 

The best indicator is the trap speed. 99mph isn't capable of much more than very high 13s unless you are hooking like crazy off the line.

 

I went 13.11 at 101.6 with a 1.73 60ft time on slicks.

 

LOL, I think 1.73 60ft qualifies for 'hooking like crazy'.
Plus your trap was 2mph faster.
I would love a sub 2 second 60ft (drag radials to be ordered fairly soon). With a 1.73 60 ft I can only wonder what my times would be :rockon:
My best 60 ft with current setup is 2.22

 

I agree, that's why I asked.

 

I trapped at 109 and ran 12.45. That was w/ a 1.8X 60' in a manual car on 245 nittos. A 1.73 would put me closer to 12.30-12.25. That was pedaling it out of the hole on a 100 shot.

 

I bet you'd run 12.3's w/ 1.730 60's. I ran 12.39 @ 109.5 w/ a 1.730 60' before my cutout was installed. I have to ease into the throttle a little though too, b/c flooring it off the line results in 1.8-1.9 60's and slows me down. Get some drag radials

 

Well, now that we know what heads & cam you've got, I'd say that 12s might be possible, although I'm still not convinced that you'll see it without more mods. The TPI is going to be a major high rpm restriction. I see a LOT of guys with TPI ZZ4s in the mid 13s, and I don't think a vortec headed motor is going to be any more capable than a ZZ4, especially with the mild cam that the 330hp motor comes with. With exhaust port work on the heads, a bit more cam, and something other than TPI, I think mid/low 12s is absolutely within reach. In fact, this is one configuration that I'm considering myself. The Vortec heads are fantastic heads, but the TPI is definately going to pose a restriction that will make 12s somewhat difficult without additional mods.

 

You don't think an SDPC base (ported), AS&M si-runners, and a totally hogged out plenum will pull that 350 to 5500 - maybe even 5750rpm? I think it could, as long as the port work to the base is extensive (really extensive!)

 

I shift Mine at 5300 and thats where it runs the best ET and thats with stock base,heads and runners!

 

Damn you automatics and your 60's.
I'm jealous.

 

you will not hit 12's peroid.......mid 13's will be your best.....

 

I went 13.65 with underdrive pulleys, gutted muffler, air foil, thermostat, 50psi fuel pressure, Timing at 12 degrees,slicks, home made ram air, throttle body coolant bypass, trans pak shift kit, removed spare tire and jack. A Freind of mine had a 87GTA 350 with longtube headers, gutted cat, flowmaster and 1.6 rockers and went 13.65 also on street tires!!. Its not hard to get mid 13s out of these cars!!!!!!!!!!!

 

Slicks make a HUGE difference.

 

You won't be able to use the Accel base, you'll have to spring the $$ for the SPDC Vortec base.

Either way, you'll be hard pressed to run sub-13 times with your combo...I'm guesstimating 350 HP (generous) at the flywheel, lose 25% for your auto (you'll get a few tenths back with the stall converter) leaves you with 260-270RWHP...don't think it's enough to eclipse 13 seconds...plus, 3.73's are not LTR-friendly.

Anyway, hope I'm wrong. Good luck

 

The Vortec heads flow way better than the 113's. The Vortec will flow 235 cfm at .400 lift and max out at 240 @.500 lift. The 113's will max out at 192 CFM@.400 Big difference!!!!!

As far as making it hard not to get cars into the mid 13's, mine won't and I'm ticked..... I have a ZZ4 cam, ported plenum, 52MM TB, Hedman shorty headers, dynomax 3" cat back with a flowmaster muffler. 3" cutout ahead of the cat, Pocket ported SR torquers (.202/1.60 back cut stems 245 cfm intake, 170 cfm exhaust) 1.5 RR, Edelbrock base and big port runners, 89 serpentine belt system, 3.42's, 2500 stall converter, Dunlop SP Sport 8000 tires, Auburn Gear limited slip, aluminum driveshaft, Aftermarket trailing arms and this POJ only runs 14.3's at 98.5 mph!!!! Of course the car is 3600# and the driver is 250#....... My 0-60 was 2.01 and that was half throttle off the line and then nail it due to a lack of traction.....

Of course guys say that Pomona is a half sec quicker than Bakersfield, but Bakersfield is a half sec quicker than LACR....

I would say that your chip is going to be a major factor in how well your car runs with the equipment it has in it. Just like carb jetting in the old days.