Whats up. I just bought my Formula with the L98 and I'm trying to figure out where to start. I'd like to get it into the mid/high 13 second range and then fix up the appearance issues. I was wondering what kind of bottom end these motors have-it seems like everyone just mods away without worrying too much about blowing them up sans nitrous or forced air. What are the best startup mods to get me into the 1/4 mile range I'm looking at? And once i mod the engine would I see much improvement by going to 3.42 or 3.73?
Thanks for any help!

 

since your new, use the search and type in L98 but only search in the subject, theres a tons of stiff.

Friend of mine had a 88 Formula all he did to get into the 13s was a homemade ram air with K&N, bump up the timing to 10 BTDC
air foil, and AFPR (adjustable fuel pressure reg) that it. He also ran a NOS 150 shot and ran 12:40.

Have fun this site is a weath of information

 

im hopin to run a mid to high 13 with the mods listed in my sig. with whats installe dnow (minus the Nittos) i ran a spinning from dead idle 14.5@94 mph. so just maybe...

 

A 1990 Formula shouldn't need to much to run in the high/mid 13's. Attention to detail will get you there easily. I would imagine you would probably run a low 14 now. So with some traction (Nittos, LCA's), a K&N cone filter, port the MAF and Plenum, bump up the timing (I dropped 2 tenths from 6*btdc to 8* btdc), and a afpr and you should be there with no problems. If not, add some headers and a cat-back ehaust and you should be laughing. Plus a new exhaust sounds cool!

Slapping on a bunch of bolt on's is usually a waste of money and don't get you to where you thought they would. Most people don't seem to give the L98 enough credit, with some thought and a litte modding/tweaking high 13's should be no problem.

 

Speed88 has a lot of good ideas for lowering ET. I personally picked up two tenths with a Cold Air Induction...You don't have to worry about porting the MAF because 1990 - 1992 TPI cars had speed density.

 

LMAO!! That was pretty stupid on my part. How can you port something that isn't there?! LOL!

 

You actually measured a 2/10 increase from the cold air package? I will be installing mine in the coming days/week and have been trying to find results from this.

 

thanks for the input guys. i was talking to a friend about the afpr and he expressed some doubts about the factory fuel pump. would bumping up the pressure put a lot of added stress on the pump or is it not that big a deal? also, for the money of porting out my stock intake would i just be better off going with an edelbrock stealth ram set up or something similar? and I g-teched my car (with old transmission, which is being replaced) and the best i pulled was 14.7. i have potenza 245's on right now but even then not a whole lot of traction-is there a better tire option that would still give me everyday drivability?

 

I ran a 15.73 with the factory airbox (with K&N) and with a 3.5" CAI I ran 15.52 with no other mods. The factory setup is very restrictive, You can hear the air being sucked in with CAI.

 

Details on the CAI please

 

I bought the 3.5" CAI from Third Gen Resource. With the 3.5" setup you have to watch that you don't pinch the coolant line.



http://www.thirdgenresource.com/inc/pdetail?v=1&pid=491

 

how do you think the SLP cold air box compares to this unit? I got a the SLP kit last year off someone, I bought my car home last night from storage so I will try to get the box installed this weekend.

 

The SLP setup is better than stock but it still sucks air through the air canister. With my CAI, my K&N can suck air all the way around so it is less restrictive then the SLP system.

 

yeah but the SLP is a cold air unit. Putting a open air filter anywhere in the engine compartment sucks in warmer air than the SLP setup.

Air temp. has a direct impact on power output from the engine. I would rather have the cold air any day over the warm.

Also the SLP box is very large and in no way restricts air flow...just my .02$ after putsing around with it yesterday

 

SLP CAI will make a difference but I knocked off 21/100 hundredths off my quarter mile time with my setup (no other mods) so I'm pretty happy with it.

 

i currently have the homemade pvc pipe wai. i have the SLP single CAI sitting in my garage right now waiting for install. i noticed zero improvement when i went from the throttle body mounted k&n filter to the wai i made. maybe getting less air that is cool is better than getting more air that is warm. ill report back when i install it.

 

three inch single exhaust with hollowed out cat droped me froma 14.95 to a 14.59 and like 95.06mph tp almost 96 now and im gonna try runnin it friday at the track too so we'll see what happens