Modified L98 track results, 13.68@100.6 - Third Generation F-Body Message Boards

87350IROC · 08-03-2009, 12:16 AM

I finally got around to getting the IROC to the track since building the motor 5 years ago. I ran a best of 13.68@100.6 with a 2.031 60 foot. Which is about what I expected based on how it feels on the street. However with the combination I am running I would expect it to be a fair bit faster. The car was hooking up pretty well. My setup:

1987 IROC
3450lbs without me (170lbs)
L98 block
Trickflow KD 195cc heads - straight out of the box
ZZ4 cam
Edelbrock TPI manifold
AS&M Runners
Ported Plenum
stock throttle body
24lb injectors
SLP 1-3/4" headers
Catco cat
Edelbrock 3" exhaust
700R4 trans
3.27 posi 9 bolt
completely stock suspension
245/50/16 Goodyear GS-D3 tires
car was tuned before rebuild, before heads, before cam, motor was burning oil at the time, but is setup for 24lb injectors

So what do you think?

I think I need to get the car tuned. Hopefully that will help a lot. I also wonder the condition of the cat after so much oil has been burned through it?

Thanks
John

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88fastgta · 08-03-2009, 12:42 AM

i think you should do some suspension mods with that combo... you should be in the high to mid 12s with that setup... you have a pretty good setup there.... alot of people over look a stall converter and shift kit, that would help out greatly....a tune would also greatly benefit that setup..... alot of people need to remember that these cars are 18+ years old and they are not going to perform like they did new.....on my old setup i did full bolt ons with the highflow tpi intake similar to yours and added a crane 2032 cam and ended blowing up my 130,000 l98 engine.. got it dynoed and it only put out 213whp by 283wtq....

87350IROC · 08-03-2009, 01:36 AM

Yeah actually I'm going through the suspension this fall. Although it will not be a drag setup. I plan to replace everything. See this thread if you are interested.
http://www.thirdgen.org/techboard/su...-build-up.html
No doubt it will help though, maybe hit the tires a little harder. Doesn't explain the lack of MPH though. Motor has about 5000 miles on it. Trans has about 10000 miles on it with a trans-go shift kit. Converter is stock. I'm not sinking any more money into the trans. The car will get a T-56 within a year or so.

Agreed though, I think the car should do high 12's with everything set up right.

IROCThe5.7L · 08-03-2009, 04:12 AM

What was your 60ft and 1/8 mile?

88fastgta · 08-03-2009, 09:16 AM

well if you engine is that new and you have a shift kit i would say its all in the tune then...... my car would stall out with the hotcam and felt like a pig until i got it tuned.. now my car has loads of low and midrange rpm....

87350IROC · 08-03-2009, 11:10 AM

Quote:

Originally Posted by IROCThe5.7L

What was your 60ft and 1/8 mile?

60 foot was 2.031 sec. Very consistent all night. I don't have the 1/8th on me right now. Will have to check when I get home.

On the positive side, I surprised a few LS1 cars by running right next to them for the first 1/8th, and beating all of them to 330'. Also beat a "560 rwhp" supercharged new mustang who was running mid 14's,

MTXaudioSYSTM · 08-04-2009, 01:41 AM

l98 ftw. and the camaro looks veryy sexy.

nice work!

Bullydawg · 08-04-2009, 02:08 AM

Nice running! Got a better time then me my first and only time at the track! I plan on going out again soon though...

gearhead0384 · 08-04-2009, 03:09 AM

If you get that 60' time down via a Tire and a converter then you will be sniffing the 12s.

Its not bad but I am positive you have a lot of room to improve.

PM me if you want to know what I did with my stock set up with mininmal work/ untouched L98.

cronsformula350 · 08-05-2009, 02:58 AM

Check out my IROC-Z and see the times I posted with a stock motor basically, with a few mods, lol, u'll be disapointed with your car, it had 156,000 miles on in too, with a slipping trans.

Its at www.cardomain.com/ride/471099/8

87350IROC · 08-05-2009, 03:52 AM

Does anyone think the cat could be clogged up for burning a lot of oil through it?

Anything else other than just getting the thing tuned?

Thanks,

John

88fastgta · 08-05-2009, 08:44 AM

yea of course... my old converter got clogged because my engine was running rich and then lean...... you couldnt even see through the converter anymore.... so i gutted mine and it didnt seem to struggle nearly as hard..... if it were me i would gut mine... not that hard to do... i used a hammer and pick and then i vacummed out all the dirt and crap that fell out......

thunder85 · 08-05-2009, 11:36 AM

just leaving it gutted tends to create turbulence, causing some backpressure issues. drive a pipe through it after gutting it so that you have a clean path for the exhaust.