Remember the big deal everybody made last year when I ran 13.15 with all stock stuff? I was unable to post last week due to TGO being a little messed up, but I ran a pair of 12.93's last saturday. Unfortunately, on my second pass on Sunday, I broke the ring gear and pinion (moser) two spider gears and a center pin (auburn) and the low roller clutch in the trans.

I got it all together and was running 13.1's all day yesterday.

my best 60' were1.75's.

The intake plenum, runners, and base are stock and unported. The heads are stock and unported. the cam is stock, the torque converter is stock. the only mods I have made not in my sig are an electric water pump and AIR,AC,andPS pump deletes, and I now have richmond 3.73's. the interior is completely stock and original with power seats, windows and mirrors.

 

Wow, Thats very impressive. Do you have any slips to post or dyno graphs?

 

Nice job! I figured you'd get into the 12's sometime soon, very cool. How was the air? Pretty good?

 

My computer at work doesn't have a memory card slot so I can't upload pics yet. they will be coming soon though.
It was cold last weekend and had very good air. It was hot and muggy this weekend which is why the car slowed up.

 

u make me wonder what my car would do on slicks and 3.42 gears with a few more mild mods like AC delete/electric pump/etc....

i trapped 100.87 mph on street tires but i do have a 2800 stall.

your car seems like a freak. nearly 104mph with stock TPI and just full exhaust/roller rockers. thats very impressive. i know guys with tunes on fully modded TPI/superrams doing near 103-105mph

i'd like to see some slips.. that car is nuts

 

It would be easy + cheap if you could find some 3.45's for that 9-bolt.

 

I've never had the car tuned or dynoed. The only thing I've done was adjust the fpr by looking at the o2 readings at WOT. A good tune would probably help a little.

 

I've been waiting for you to make it into the 12's. - It's about damb time!

congrats!

 

i'm gonna have to disagree... i been looking for quite some time before i went 3.27's.. 3.45's are rare and bring a BIG price

 

Are you sure? It should be the same as you paid for your 3.27's.

 

Are you the original owner of the car?

 

Do you have a nine bolt? Most of the cars of 1990 or later came with a ten bolt. I quite a few who installed a nine bolt for the strength. Yes the 3:45 gears are very scarce unless you live in Australia.

 

AWESOME!!

 

price wise it should be.. but because they are so rare, ppl that have them mark them up for high prices. i found a few 3.45 rears complete for well over 300. why pay that when you can have a 4th gen rear for the same price, with better brakes and more aftermarket in case of breakage.



anyway i thought i remember reading your thread when you went 13.15's, and you said you werent the original owner. could have a cam in it. i wouldnt be surprised

 

What kind of tires are you running on the back? I could run 12's with those 60 fts.

 

its all in the 60 foots, congrats.

 

1.7x 60's on stock torque converter... thats pretty darn good

 

I am wondering about the stock intake....pretty hard make that kind of power on an F-Body L98 with the stock intake.

You are pulling some serious 60ft times though... That is the fun part about L98 TPI's. Lotsa low low low end torque and a trans with a mile high first gear!!

 

Hey GTA matt,
That is some impressive times you have got!! Wondering if that must be all throttle body workin for ya. I just recently picked up a 58mm along w/my mods in my signature and will be runnin sometime this spring after I get a custom burned chip. I hope for some big improvements. I posted a while back about gettin the mini-ram set-up, but that got hindered to some medical issues so this is all I could afford for now. I'll keep ya all posted on how it goes.

 

Stock TPI , stock heads , stock cam . You have a 58 mm TB ???? Why ?

Also why is it worknig so good ? I think it has a cam or soemthnig else . It sure has SOMETHING in it for sure. It can;t be stock

 

I only have a 52mm TB. If I had to go back, I would have saved my 300 bucks. The throttle body didn't do a thing.

The car has the ten bolt disc rear.

I went over all this stuff a year ago, the motor is absolutely stock. Just headers and 1.6 rockers. The rest is in the suspension and tires, which are now 26/10/15 MT E/T Drags. I thought I had them in my sig but I guess I don't.

We switched over to 1/8th mile for the gamblers race later in the day and the car was on its way to run a 12.91 first round.

 

I just dont know what to make of all this. I called BS on this car last time he posted the 13.15 and I am tempted to raise the flag again. I am not saying the car did not run the times claimed, and I certainly do not want to call GTA matt a liar. I just think this car has been modified without his knowledge, plain and simple. There are many things that dont add up, but there are a few that do.


THINGS THAT DONT ADD UP:
A 14.5 is good for a heavy stock 350 GTA. He has exhaust, TB, rockers, and a chip, that should net roughly 14.0. This car is a full second quicker and 5mph faster than some of the fastest known stock 350 Camaros. 4 MPH!!! If he wasnt trapping 104 mph I would say he is just getting out of the hole well, but to trap 104 in a plus sized GTA he has to be making 350+ hp at the flywheel. This is LS1 territory guys.

Another is the stellar 1.75 short times. My only explanation is there has to be a converter in there somewhere to do that. I dont know of anyone else doing that with stock stuff.

Overall this car is just too far over to top to be believable. If he said he had a BONE stock GTA that would run a 13.80 @ 100mph that would be hard enough to swallow, but somewhat believable because there have been L98 Camaros and Formulas that have ran close to that though they are few compared to the amount of stockers that run 14.8. Heck we would be amazed if he told us his cam only GTA ran a 12.93 and he is claiming stock long block?

The 60ft time, ET, and trap speed all fit together as a legit pass, but not for a stock car.

THINGS THAT DO ADD UP (sort of):
There are a few guys on here that are running quick ETs for stock intakes, many of them at the top of my head are 305 guys however. TunedPort335 runs a 13.40 at 96mph with a stock headed and intaked 335 with 2.73 gears. That is a fantastic ET but his MPH is believable. My ET is poor for my combination because I can not launch the car, but my trap speed is decent at 100.5mph. I have a ported stock intake, cam, and port matched and polished heads, and the stock chip.

This still brings me back to the question of GTA matt running 104mph with stock unported intake and heads. Decent times can be achieved with stock intake stuff but 103mph on unported parts? No way.

 

With a 60 foot that low, i say its quite possible and true, and of course a good shifting tranny. to ensure it makes it down the end.

I hope i can get close to that time. The roller rockers i think make the heads not totally stock, i wonder what it would run with the stock rockers. either way its running good.

 

[QUOTE]Originally posted by D's89IROCZ
[B]Stock TPI , stock heads , stock cam . You have a 58 mm TB ???? Why ?

Did you not read my signature? I didn't say anything about having only stock heads, stock cam.

 

with the mods you claim to only have done, you might break into the 13's but 12.9's?? i bet any other 350 couldnt even do that with 75 or 100 shot of nitrous, yeah you have slicks, but theres gotta be a converter or something to yield 1.7 go fts, im sure it could possibly be a factory freak, but who are you kidding, you gotta be making at least 320-330 WHP to get into the 12's

 

That trap is too high for those mods. I understand there are freaks, but thats above and beyond. BUT I cannot prove crap, so congratulations on the new times.

 

He is not the orginal owner. So it could have a cam or aftermarket heads in it.

 

He's got a good/fresh tranny, so just asume that what ever converter the trans shop put in was a rebuild(usually is) and is a little loose. Proper driving(he's got the practice...) and good suspension(in the sig/last thread...) I believe it to be possible. I went 14.70 in my car, K&N, JCWhitney cat-back and auto trans. The car weighs 4161 w/a manual trans and no ecm/wiring/tpi. Nothing else was changed weight wise from before so, it had to be slightly heavier. I was going 1.90 60's on stock suspension and 255/50/16 Fuldas - 14.70@ something like 93-94mph. The trans was fresh, and just a fresh stock type converter.
...So high 12's possible with a more traction, lighter car, and more mods? yes, I think so....

 

Actually, I'm a GM tech. I do all my own work. The trans that was in the car was the original, never been removed. I've only pulled the valvebody down to install the B&M transpak. The first time the trans was ever out of the car was on Sunday when I pulled it out to see what broke. Since it had 100K on it I replaced the band with another used band that was in better shape then mine. I installed a corvette servo that I've had laying around for years and the low roller clutch, which is what broke, is from a 2000 chevy pickup 4l60 with 200k on it.

Oh, and I put the original converter back in it. Still had the original GM manufacture sticker stuck to it from 1990.

The first time I ran the car, it had 58k on it, a hypertec chip, 160 t-stat, tb airfoil, K&n air filter, and MSD coil. It ran 14.03 at 95 MPH. Since then I've only added a few bolt ons that slowly made the car faster one by one.

Oh, and the car has 103K on it now and over 500 passes on it. Engine has never been out or taken apart.

 

well someone let me borrow some slicks.....and i'll see what my stock TPI L98 will do with just full exhaust and 2800stall. i bet i have mid lower 13's for sure. i get 1.88 60 foot on street tires... and i am babying it as much as possible to keep traction. slicks probly would drop me to near 1.7's. i'm trappin 100.x mph


104mph just means there has to be a cam in there or cam/heads of some sort.

 

That trap speed is way high. You mentioned that thety switched to 1/8 mile in the afternoon. You cannot calculate an accurate 1/4 e.t. from an 1/8 mile time on a TPI car.

My old '89 Fomula 350 which weighed about 3,400 lbs with driver and gas only trapped 100mph at best. The first 1/8 mile, it would eat moded LS1 cars. The second half, they would blow past like I was standing still because the motor ran out of breath from the super long intake tract.


It had ported intake, AS&M runners, 2500 non-lockup converter and 60ft 1.900 on a Yokohama A52 275/40/17 tire with a heavy azz RONAL wheel.

The numbers do not add up for stock intake,head,cam, and the biggest question on all-stock converter. All the TPI guru's here know that the single best improvement for one mod beside nitrous or forced induction is changing the T/C.

Hmmmm.....

 

I know a good torque converter would help alot. But i broke a built rear(moser gears, auburn pro series posi, arp main cap studs, moser axles, and TA performance rear end cover) with a stock 1200 stall converter. what do you think a good 2800 converetr would do to it? I'm waiting to put in a 12 bolt with 4.10's or 4.56's.

 

I would not run TPI with 4.xx lol

 

Actually you can. I use the car for bracket racing and it is deadly consistent.
For example, last saturday was opening day at the track. I got there in the morning, unloaded, ran 13.003 with all the fluids cold. the next to passes were 12.938 and 12.930. then we switched to 1/8th mile. Came back on Sunday. Unloaded, first pass, with everything cold......13.003. It broke on the line the next pass, but I can guaruntee it would've been 12.93.....

 

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GTA matt, what do you shift that thing at? I am curious to see what rpm that "stock" engine pulls to.

I just cant see an engine that we all know dies at 4700rpm run 104mph in the 1320.

You are running what a stock L98 car would run with a 100hp shot of nitrous. That motor has cam and intake and possibly head work. Sorry man, I just dont think people are buying the "its stock" thing anymore.

 

It shifts at 5000 Rpm and crosses the line at 3600 in 4th. Yes, it falls dead on its face after 5k.

For years everyone has been wondering if a bolt on L98 can go 12's and somebody finally does and everyone calls BS. WTF?

Is everyone just jealous because they spent big money for **** that don't match up, just to find out it still runs 14's. Do some research on what makes a car go fast before you buy stuff.

 

I believe you ran those times. I just think that there is a REALLY good chance there is something else under your hood.

 

I'm not buying into it sorry...Maybe you just did your 12.9x pass with a KN filter? Everyone here knows you dont put 4.10-4.56's in a stock TPI car...lol. I've run 13.21@104.63, 2 1/2 years ago but thats with alot more boltons. I know Formul8! was running low 13's aswell with a ton of boltons, but we both had alot of intake work. and your GTA is a much heavier car. 2-3 boltons will not get any L98 Thirdgen into the 12's sorry... maybe the previous owner did heads or a small cam. Not calling u a lair ,just saying if your car is doing 1.7..60' 12.9x @ 104.xx it has more mods then listed..

 

Actually, the fastes I got the car to go was 13.50's. Winger4800 who bought the car from me, made a few minor changes and the car went 13.30s with a ton of room for PROM tuning and a few other items.

As far as I know, it is still stock heads, cam, bottom end.

 

I do believe that car ran the times. He posted the slips earlier on, when it ran 13.15. I DO NOT however believe, the car is , as he says. Ive been around the block a few times. I know lots of people that can build a 406, and tell the world its a 350. Now IM not suggesting he has a 406, just trying to make a point. Running that kind of trap means somthing in the heads or valvetrain is modded.

 

the only way to find out is to take a look at the heads.. is there a casting number on there? maybe even measure valve lift to see if its indeed a factory cam

104mph in a full weight car with stock L98 with few bolt ons and stock converter.

if you had a converter it be more believable. i wonder what the fastest bolt on L98 vettes are doing? i know i heard of a stock TPI car in the 12.8's i believe but he had cam and head work.

you have the same basic mods that A LOT of ppl have on this board and your running on average 5mph+ faster and up to a full second quicker. i dont think that shows that research payed off. and i know they aint jealous... cuz your the only L98 car that has gone this fast that i know of and most here know of with as few mods as you have. if there was alot more cars going this fast then yeah, i can see ppl being upset that their car isnt goin that fast.

 

I know some cars run way better than others both being stock. especially some LS1 F bodies. I am also a GM tech not to far from him. He is hooking super well on a sticky track with sticky enough tires to trash the rear, I dont see any reason for him to make something up. Aint like hes winning $ for being a stocker in the 12's congrats. my car has more bolt on and is slower but it sure wont hook like his!

 

Is it a TTA

Your car is a FREAK!

I would be happy with high 13 pass..

slick do help quite a bit..

 

GTA matt, I dont think anyone here is calling you liar, and I for one am certainly not jealous. How can you say you have a well thought out combination when you haven't even modified the car? Anyway, all anyone here is saying is that your engine is modifed in order to run those times. Please dont take offense, if this was my car I would be wondering what the heck had been done to it to make it run so good.

 

At least someone else picked up on that.

 

I've been over the history of the car a year ago. The car was traded in at the pontiac dealership I worked at 4 years ago. It needed a new rear. I stole the car at $3500 with only 58K miles on it. An older couple owned it and rarely drove it. I bought it and began modifying it.

What kind of aftermarket heads would someone put on that still have press in rocker studs??? I removed the ORIGINAL intake gaskets from the car a year after I bought it because it was leaking oil. Believe me, I know what the original intake gaskets and runner gaskets are when i have to grind them off because they've been stuck on for 10 years. At the same time i did that, I installed valve stem seals because it had the typical start up smoke. What aftermarket heads do you have to do that to? The timing cover and oil pan have never been removed. And who trades in a car that has alot of work done to it?

You can listen to the car and tell it has the stock cam. I can put a dial indicator on it and show it has the stock original cam.

Oh, and to make another point about the car. It has the ORIGINAL 21# injectors with the original fuel pump. I have it running 8 PSI more then stock. Its funny, because everyone else I know slaps a 24# set of injectors in before doing anything else.

Believe me. I, more then anybody else knows this car inside and out. theres nothing on the car I don't know about. I ran into the original owner a year ago and raced his new LS1 trans Am. He almost had a heart attack when his old TPI car spun tires past his new one.

And why not put 4.10's or 4.56's in a TPI??? Anybody else installed a modified plunger in the trans so it shifts to 4th ot WOT? I want to use the most out of all 4 gears the car has.

 

Awesome!! Matt, I PM'ed you.

 

Stock with heads and cam work ? LOL

Let's put this into perspective. A bone stock LS1 MANUAL TRANNY camaro/firebird with slicks have been known to get into the 12's barely with slicks, of course they put down 280-290 hp at the rear wheels.

I am sorry but this is no way a stock cam,stock heads and intake TPI with a stock convertor and tranny are putting down anything near 280-290 hp at the rear wheels which is close to what you'll need for that time. It don't add up.

There freaks in every year vehicle. Say you have 20 identical vehicles. 2 faster than average, 3 slower than average and 15 about average. Say he pulled a rabbit out of his hat and got one of the faster than average ones. I'll be generous and say somewhere your car got 20 extra hp than the average car did. That would give you 260 flywheel hp (stock). With only a 20% (probably higher) drivetrain loss you have 208 hp at the rear wheels (stock) plus your minor mods. There is about 70 hp somewhere in there.
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Hooking up and getting excellent 60 foot times are a great start to a great ET but that still does not explain how this TPI does not run out of air on the big end and the last half of the 1/4 mile as all other TPI's do ?

 

I pulled 104.6mph out of a Bone Stock TPI 3 years ago, but there was a 383 with a tiny XE256h cam under it, sorry I just cant beleive its stock like you think