It's going down a few days after after March 9th, gotta get my car tagged and insured. My mods are:
87 IROC 305 TPI
Holley AFPR
Holley Airfoil
BBK Underdrive Pulleys
Full Exhuast (TES headers, cat delete, blowmaster catback)
Free mods (gutted airbox, ac delete, tb bypass, smog delete)
LS1 Driveshaft
4th gen rear w/auburn posi and 4.11's
Suspension upgrades

My boy just has a stock 89 Supra Turbo 5-speed with muffler. How would i stand up against him? I'm gonna run him regardless, just wanna know what I'm up against. I think the odds are in his favor. I also have an LT1 cam for install, but it won't be going in for awhile. Thanks in advance.

 

Race from a stop and hope you nail the launch. You're going to run out of steam real quick with TPI and 4.11's.

 

I think he's got you beat, unless you only take it to 60.Then maybe.

 

Why would you put 4.11's in any TPI car. TPI makes its power low in the rpm range, so you want to keep it in its "sweet spot" or powerband. With those 4.11's your engine is going to rev out extremely quick. I say for an auto 305 go with 3.42's with a 5-speed 3.73's, but 4.11's come on now.

 

wow, 4.11s in a 700r4.

first gear is useless. with 3.27's my gear goes to 30mph!! 4.11's has to be 15. your just gonna spin! lol dont go from a dig.

go from a light roll, your 2nd gear. and race to about 80, your top speed in drive. LOL

he'll win cuz he will be able to go over 80mph

 

Well the 4.11's was a no choice deal. I wrecked the stock the rear from an accidental spin on a rainy day (thank it was only the rearend that took the hit). Then a couple of weeks later, a buddy of mine with a 94 Trans Am, bought a moser 12 bolt and was gonna throw away is rear, btw which is in very good shape. So i bought for $100 (one mans trash is another teasure) and i was good from get go. He said there were 4.11's in there, but it doesn't seem like it. There is also a semi-brand new auburn posi and with the gears. You'd be surprised how well it travels to 80. I actaully thought the gears would hurt it, but i guess not. Anyways, i had a feeling he would take me. Currently, the only problems he has is a boost leak and driver mod. He's new to stick. I'm not gonna take advantage of him like that. I want it to be fair (will it be fair on my side? HAHAHAHA!!) cause it all fun. When i lose i guess, just means more gotta be done to the motor. I'll try to get it on video also. Just gotta if aunt will let me borrow the video camera.
P.S. The gears feel like they have to be around 3.42 to 3.73. Because speedo didn't need to be calibrated, cause it looks to be pretty accurate. And car hooks and goes from punch (i'm kinda gently with her).

 

My 1st gear also goes to 30. That's why i'm thinking i have gears lower than the 4.11's. The guy i bought it from knows how to wrench things together, it's just that his facts and info is all screwed up. Told me LT1's came stock with 400hp. Whatever...

 

By that ratio, maybe you do have 3.42 gears...

 

Is there anyway by the human eye i can tell what gears i have? I remember something about counting teeth on gear and then dividing by teeth on pinion? I don't remember. Anyways, he's getting the car registered today and we will later on this week take it to an exhaust shop to patch up the exhaust leak. Then we gotta find out where the vacuum leak is coming from aswell.

 

Yeah, you count the number of teeth on both gears, and the ratio between them is your gear ratio..

 

You can do that or you can look for the teeth ratio that is stamped on the ring gear.

 

I'm hardly biased in this opinion, as I've owned 3 3rd gens (one a TPI), and I currently own a Toyota.

I think that you might get him off the line, but after a couple gears he'll be flyin by!

 

here is a very simple way to tell your gear ratio.

Get a buddy along side you incase your speedo is off. Go EXACTLY 70 mph, as clocked from the other car. Keep your car in 3rd gear (1:1 gear) with your foot slightly on the gas holding the car steady at 70. This won't work if you're coasting at 70.

Look at your RPM guage. If your RPMs are at 4100, you have 4.10s. If your RPMs are at 3420, you have 3.42s. This works for all ratios. Neat huh?

4.10s in a 700/4L60E isn't as bad as most people make it out to be. What he did wrong is put them in a car with a long tube runner setup

 

Urbanhunter, that is pretty neat. I'll try it as soon as it get it on the road. As far as the race goes, i already new that he was gonna take me up top and from a roll, knowing how the tpi chokes up there. So I may be able to get him from a dig? Going to like, 70-80ish?

 

here is a very simple way to tell your gear ratio.

Get a buddy along side you incase your speedo is off. Go EXACTLY 70 mph, as clocked from the other car. Keep your car in 3rd gear (1:1 gear) with your foot slightly on the gas holding the car steady at 70. This won't work if you're coasting at 70.

Look at your RPM guage. If your RPMs are at 4100, you have 4.10s. If your RPMs are at 3420, you have 3.42s. This works for all ratios. Neat huh?

4.10s in a 700/4L60E isn't as bad as most people make it out to be. What he did wrong is put them in a car with a long tube runner setup


HOPE YOU HAVE THE STOCK TIRE SIZE FOR THIS "FORMULA" TO WORK.

 

Yes, i have stock tire size on the car. 245/50/16 all the way around. So i feel the technique should work.

 

groovy man

 

Just curious, what times is everybody running?

 

13.5 at 99. Mod list is on my webpage below.

 

Nice!!! I would like to be in the 14's. Probably low 15's with my set-up. You think?

 

The only way to tell is to run it at the track. I would say your in the high 14's, but a guess is a guess.

 

15.1... with all my mods... but it did have 200,000 on the stock motor

 

Would love to go to the track, just don't know where any area in my area. I live in Boston, don't think Mass has a track? The motor is definitely a strong running one, only have 81k on it. It was treated pretty bad before i got, but now i'm giving it all the TLC it deserves. *** bless the 305!!

 

Epping, NH is the closest one

 

Hey 89IrocZ350TPI, your located in MA. Where about? It's cool meeting other camaro owners.

 

Worcester, MA

 

Why has nobody mentioned that you can just jack the car up and turn one wheel and count the number of wheel turns it takes to rotate the driveshaft once?

 

Another neat trick. Won't hurt to try it.

 

beat me to it! i got in here late. lol that will get a rough idea of what u got LOL

i got a header/exhaust/gutted airbox L98 with 2800stall and 3.27 rear. goes 13.9's at 100.9 as my best. with the 2.77's i hit 13.89 at 97

 

I have a friend with an MKIII Supra Turbo with the 5 speed (it's also an 89). When it was stock, he was beat by another friend with a 90 LB9/700-R4 IROC with 3.73s and similar bolt-ons numerous times. IF you have traction, you will win. The MKIII turbo 5 speed cars are rated at 15.2 second cars through the 1/4 bone stock. My buddy managed 15.0 out of his Supra with directional sticky tires.

You won't win by much, but you should win. The MKIIIs are nothing like the 93+ MKIVs. Only 232hp/255lb-ft in a 3600 lb car. Nothing that a good TPI thirdgen should be scared of, when in stock form.

Of course, I know first hand that like all other turbo cars, these things will fly with some $$$. But bone-stock (and untouched) they're nothing to be scared of.

 

The 90 LB9s were a good amount faster than the 87's.

 

Gotta love the L98. I was looking for one badly around the time i picked up my IROC. If knew all the channels i do today compared to a year ago, i would've got one. But the LB9 is wonderful platform to learn off of, especially for a 1st time rear wheel drive car with gobs of torque. My 1st car was a n 85 200sx, loved the car, but it was sslloowww. Learn my lesson with it too. Always check your fluids and never take your car for granted.

 

Eh, 20 ponies. Given the extent of his mods, there really isn't much of a difference between his car and a 1990 auto LB9 with the same mods.

Both are peanut cammed, and Speed Density isn't going to magically grant him a ton of power. I've seen plenty of bolt on LB9s from any year with the 700 that have broken into the 14s, and that should be all he needs.

 

He definitely won't be puttin in money into while i'm still here. He's gotta do things like bacis tune up and working out all of the quirks. Won't be able to race him once he puts money into, i'll be at Wyotech for about a year. I plan to boost the 305 in the future. Rebuild motor with forged internals and take the porper channels to get the turbo working at it's best. If done right, i don't believe he be able to touch me. His knowledge with cars in general is very limited, but he'll learn in time. He's my best friend, plus it's all fun and games.

 

Oh, btw, the motor in his car is from an 87 Supra Turbo. I know it really doesn't make to much of a difference, but i believe the short 8 ponies and some torque, prior to the 89.

 

The 86 cars had the real PEANUT cam straight from the lg4. I believe the stock 90 LB9 cars with a 5-speed ran 14.8-14.9.

 

The 5 speeds were faster than that in many cases. I've seen closer to 14.4s-14.6s (a.k.a. L98 territory) out of the 5 speed LB9 cars. Remember that only the 5 speed cars got the better cam and were rated at 230 hp.

As for the LB9 autos, they're all about the same. The 85 had the same cam as the L98 and 5 speed LB9s, but 86+ are pretty much the same. With full exhaust and bolt-ons any LB9 auto car 86-92 is going to be in about the same territory. There are slight differences in the cam in auto LB9s that's shown in the tech data section of this site, but they're all considered "peanut" cams.

 

If you boost the 305, unless he replaces his CT-26 turbo or does some major weight reduction, you will destroy him. His current turbo isn't good for much more than 10lbs on that motor, and it's already pushing 8 lbs from the factory.

There ARE 800+ hp MKIII monsters, just like the 1000+ hp MKIVs, but he'll be spending a lot of time and money to do that, which it sounds like he's not that committed.

 

I know there are some powerhouse 7M-GTE's out there, but it'll be awhile or probably never happen with boy. I don't know for sure how commited he is. His 1st car was a Jetta III GLS, which he got around the same time as I got my IROC. Just one ride in the IROC, he wanted to get rid of his Jetta to get something faster. It definitely seemed very fast the 1st time i drove it. Never been in a car with a decent amount of torque before this one. In the future if he does stick to his guns like he speaks now, there's gonna be some good times.

 

To tell you the truth Supras are car not to underestimate. I ran a 12.4 in my Trans Am. I also have a 1987 Turbo Supra with a downpipe and boosting only 8psi off the turbo I ran a 13.8 but I only got to run it once because the headgasket blew. But with a boost controller and a fuel management system you can get supra's in the 12 real easy just turn up the boost. John

 

I think it is a drivers race. I do agree about the 4.11 with a 700-r4. 700-r4s have a 3.06 first gear, and i bet you zoom right through first too quick. Dont feel bad though i almost made the same mistake.

 

That is a good theory, but just remember that the stock tachs arent always the most accurate things.

 

I dont what to say this but the tach thing doesnt work because at 70mph in my car I am doing around 2800 in 3rd end the rearend is a borg warner 10-bolt posi-trac.(3.23) gears The transmission is a level three bowtie 700r4 race transmission. John

 

perhaps your tach is off? I've personally tried this in 5 different GM vehicles and it was dead on every time. You need to have the stock tire size, forgot to mention that. Also there are no borg-warner 10 bolts. Only borg-warner 9 bolts. If your tach is accurate you probably have a bw 9 bolt with a 2.77 posi.

Also link here's another way, with the stock 700r4 gearing and 50/16 tires you should be taching ~2500 rpm in overdrive while doing 65mph - although your speedo will be reading high. Mine read 83 when I was going 65 in my old T/A. She went from 3.23s to 4.10s through a 4L60E.

 

Will do. Been taking awhile to get her on the road. Been really cold lately, making really hard to get things done. Should be ready next weekend, hopefully.

 

Ok it is a borg warner 9bolt but it has 3.23 gears in it(counted the teeth when I changed the gasket and fluid in the rearend) . And The tach is not what I am going by I have a megasquirt engine mangement system I just plug it up to my laptop and I can control the whole engine from inside the car on the laptop. And the rpm is running between 2800 and 2900 at 70 mph in 3rd gear. I got stock size tires on the rear also. So on my end it doent work.

 

my fisrt crush was a 90 4 door 2.0L auto toyota camry, i put a turbo (from a 2.3 mustang)on it and used my cold start injecotr for fuel mangment with a boost switch no intercooler and ran 6 psi(motor lasted 1/2 year). now the reasion im telling you this, my roommate at the time has a 91 vette with 6/speed and l98 with the same mods you have and head work and a hotter cam. we raced in bangor ME and from a stop he beet me by 2 1/2 cars and he barlly pulled in any other gear then 1st (some of you might call bull ****, but i got the vid to back it up) make a long story short i think you might get taken

 

I bet that thing makes some nifty burnouts with that 4.11 and 700-r4 1st gear

Just messing.

Without serious mods, that supra shouldn't be much of a threat. Just launch like a ***** and you'll be alright. Be glad your not racing a 2JZ

Btw, mine is a 3.27 posi and I hit about 35 in 1st hitting about 5000 rpm. 2nd gear sucks, so you have to over-rev 1st a good bit.

 

I used to run an '87 Supra for SCCA autocrossing and I constantly got my *** handed to me by the F-bodies in the class I ran (FS). That was with exhaust and some (cough, cough) "tuning". The best I ever mustered was a third place. I think your Camaro would win, turbo doesn't kick in on the Supra till around 3k. Although I do agree with everyone about the 4.11's

 

I would assume so in most cases.

My brother has one and it's a pile.

He's dropped a 1JZ in his Tacoma with a 5 speed now.