hello everybody I have 89 formula l-98 63000 miles runs strong, mods are UD pulleys
CAI
ported runners and plenum-airfoil
and a chip from pcm-for-less
what else would it take to get into the 13's no nos.thanks

 

Have you done headers and exhaust?

 

2800-3000 stall and slicks

 

no headers just a flowmaster muffler was on the fence about headers I read a lot of posts of people having issues with them leaking will see would like them but not sure yet

 

ok thanks will 1.6 RR make a difference seem reasonably priced and don't seem to bad to install.

 

Yes they help but really need exhaust headers to make full use of everything. Base timing to 8 deg and 91-93 oct

 

I HAVE TRIED ADJUSTING THE TIMMING I CANOT GET A WRENCH OR SOCKET IN THERE TO BREAK LOSE THE DIST NUT I PURCHASED THE DIST WRENCH STILL NO LUCK ANY SUGGESTIONS

 

Dizzy wrench is all you need but may need to remove coil and bracket to get to the hold down bolt

 

headers are generally always a plus!!!! I have hooker shorties never a leak, used to have headman long tubes on a 70 monte carlo & the flanges were thin & I kept having leaking issues so I've stayed away from them. There is a lot of great advice on headers on this forum, but headers are a great idea.....

 

I use aluminum collector gaskets and no leaks ever

 

great that's good to know after world of wheels I might really look into putting some headers on. Thanks that would make it a lot easier if I took the cap off never thought of that, cant wait until the weather gets better.

 

I also use hookers they work well.

 

Doug's (knock off 2210s) Long tubes here.

Cheap, caoted and good.

 

Slicks on a well running L98 could honestly probably do it. Sticky track, good tire, good air, you're pretty much set to tick off a 13.9. Full exhaust would certainly help. It's easy, no leaks if you're mildly intelligent.

 

I couldnt get near that and thats with BFG drag radials chip headers flowmaster exhaust and a K&N filter and this was a fomula that dont have all the GFX to weigh it down??

 

I don't know what to tell you. I have a 1992 which is a little heavier than the earlier years, certainly more than a Formula. Ran a 14.4 bone stock with a 2.5 second 60 ft. Laugh at me, I deserve it yes I know. Point being, it was on a slick track with horrible street tires, and I trapped 98 mph. Surely on slicks on a grippier track a 13.9 was possible. Maybe you need a tune, or just a tune up?

 

thanks guys we will see track opens end of march or early april depending on weather I will update and post times

 

This is what I remember 1988 Pontiac Firebird Trans Am GTA 0-60 mph 7.3 Quarter mile 15.7 thats on street tires I ran about 15.0 on drag radials with no spin and that came from http://www.zeroto60times.com/Pontiac...mph-Times.html

 

Those look like LO3 times to me. L98 and 305 TPI 5 speed cars are way faster than that. Should be good for 14.6 to 14.8 bone stock with 0-60 times under 6.5 sec. Do your research wisely.

 

That's not just research I had a white one it had exhaust chip and it ran high 14 s on street tires on drag radials it would run low to mid 14 s

 

My car first hit 13's on street tires with nothing more than hooker 2055's 3" flowmaster, and 2800 stall. 2.77 gears even. 1.89 60' amd 13.89 at 97-ish mph i think it was.

L98 with all the bolt ons and drag wheels touch 12's. I went 12.99 and 12.95 at 103.8 in 188 ft DA air. 3400-3450 lbs race weight

They can scoot. If yours doesnt its either alot heavier or is a tired motor in need of a tuneup and refresh build, but mine had 160k on it so hard to say how tired it was

 

No it ran good just had a fuel pump problem and it was the 350 formula tuned port

 

http://www.musclecarfacts.com/classi...ird-statistics I was just looking around and found this

 

That article is all over the place with the ET's. 1991 trans am with 640hp? What? I thought this was muscle car facts.

 

Yeah I read more after it posted but from everthing ive seen on line that is about right unless you have seen something I havent ??

 

Please excuse me as I've been drinking I think I even saw that a 2002 trans am had 275hp which is completely wrong. That's just another example. I looked at the article through my phone so I could be wrong but that makes me not trust any numbers on it.

 

This is what it ran with motor trend this is their page in 1988 it was at 90 mph and looks like 15.6 in the 1/4

 

Magazine tests rarely get to the cars full potential

 

Then who does they have the track the drivers the cars brand new cars with no mods this is all I have to say

 

There are quite a few out there. Mine wasnt brand new it had near 160k miles on it when it went 12.9's. but engine was mostly highway mileage and babied.

True test is to dyno it. Strong bolt on l98's with different intakes or atleast big tube tpi stuff should be well over 240-250 hp. Some 260's. mine was 254 lean. Would have hit 260 whp with more fuel and it ran 12's on that lean tune

 

Another article to look at. This is from our own TGO multimedia pages.
https://www.thirdgen.org/secret_chevys_mt_june_1990

 

I think its funny how there is such a difference in what articles say cars run, cant wait until spring comes and find out.

 

You ran a 12 sec qtr mile with only 260hp? Pretty impressive

 

Definately not an impossible time, I have seen a LT1 Auto car with an intake and muffler swap run similar times in good weather as well.

That being said I have a 5,300 lbs truck that run a 13.98 with only 296 RWHP. In a car that is a good 1,500 lbs lighter I could see the same driveline picking up over a full second.

 

Yup 254 whp 315 wtq. Same day my friends 95z28 with headers exhaust 3.73's and tune thru stock auto went 12.9 at 106. On street tires. But thats more like a 275-280 whp car. I seen stock lt1's dyno 260 thru auto

 

I can't wait to get my car on a dyno to see what I'm putting out and see what a 2900 lb car can clock at the track!

 

You'll want to monitor air conditions at your tracks altitude to see what the air density altitude is. Closer to sealevel the better you will run.

My trans am ls1 car would run 12.1's at -800 feet da. Up in 2500 it would run 12.5's

My l98 record run was 188 ft and normal summer air would run 13.2-13.3

 

yea. Im hoping my combo will get me into the 13"s First time running at a track this coming spring. But I would think a well tuned bolt on L98 is into the 13 sec Range for sure.

 

Heads, cam, headers using EBL. 84 Xfire on street tires. It dyno'd at 285/347.
Best ET was 13.3, best trap 104.5. Weight was 3250 wet. The run in the video was 13.7.
And yes it had the Xfire manifold and twin TBIs.

 

My dads L98 hit 13's stock, zero mods not even a k&n engine wise. It ran slicks and he had what he called a cheater converter, stalled at just over 3k and hit hard.

I didn't like it. Street tires were impossible, it made too much noise lol.... But it did lock up so he could cruise it

 

NOS!