Hi, a friend of mine recently bought a 93 Z28 and now he wants to race me, which comes as no surprise. Would I stand a chance against him? My car is a 89 IROC stock 350 TPI and his is a stock 350 LT1, also he keeps on bragging about how easy it is to modify LT1's and how TPI is old and outdated, so I really want to shut this guy up and kick his *** in a race, do I stand a chance?

 

You don't have a chance, unless you race from a stop...

If you go perfectly without spining and he spin like crazy, you may have a chance, but don't race maybe more than 60mph

 

Yeah it was planned from a stop not from a roll.

 

is your 89 a g92 car with 3.27's? Is his car 6-speed?

It should be close for a little while, but after 60mph he will start to walk away from you. A lightly modded L98 will hang and beat stock Lt1's. If he can decently drive, he will slowly pull ahead and at about 70mph-100mph he will have about two lengths on you.

 

As stated above go from a dig. Once you get past 2000 rpm's his car will be making more power at every RPM point through every gear.

 

i dont think you will stand a chance unless as stated before he spins like crazy .......

and tpi is old and out dated .....

good luck but dont get mad if you lose ...

 

It depends how long you race. My friends 95z28 didn't catch up and pass me until after the 1/8 mile.

 

good luck let me know how it goes doing the same thing in a few months. if ur car is G92 u have a chance. And TPI is old and out dated, lol try finding aftermarket parts other than a tb there is nothing. oh yeah shifty correct me if im wrong but isn't everything outdated considering everyone is running w/ a first gen motor.

 

Yeah, nobody makes replacement baseplates, runners, or anything.

 

Dont worry I know TPI is old and outdated , however he doesnt have to be such a smartass about it. His car is an auto and my car is juat a plain old IROC with 2.73 gears.

 

dont worry about him just go run him and have fun

if you lose then you lost to newer technology big deal right ??

i bought a 72 firebird with a 350 in it one time for 300 bucks .....LOL...looked great as long as you didnt look at the driverside rear quarter....LOL

but anyway it was quick as hell and i had alot of fun in that car ...but i wouldnt go out looking to race people they always seemed to come to me with the look of the nose on that car it just screamed race me for some reason...LOL

anyway a long story short i raced quite a few people and always looked at it like this if i win then my 300 dollar car beat yours if i lose then you beat a 300 dollar car....ooooh.....LOL

 

the 2.73 gears are killing ya, Ive seen L98s take out Lt1s easily. Sotck v Stock esp the SD ones it be a close race in 1/8 mile after a 1/4 the Lt1 will win. My 91 L98 Ran 14.3, and ive seen bonestock Lt1 run 14.3 and 14.4. L98 is very underated engine. If u had the 3.23 or 3.27 gears you can take him imo

 

Was that stock? Ive always wondered what a stock L98 will run. I test drove one and that car was awesome. But then again so is the LT1

 

Yep thats what the orignal told me when he showed me the slip, to bad hes paralyzed now But anyways the L98 is very much underated, ive herd bone stock l98 goin 14.2 14.1 when they came out brand new. Just its been on the road for many years so it looses power over time..

 

i going to say\agree with what was said above if you had a lower gear then you should have had him of the line. if you have some small moddds i would say you can still take him off the line.

 

I was looking around on the net and most of the times that I found for these cars (4th gen LT1's) are 0-60 in 6.8 sec and a 14.8 quarter mile. These were tests done from car magazines, my IROC reaches 60 quicker then 6.8. Are these accurate results or just bs from a test driver that didnt push the car hard enough?

 

no those arent accurate. A Lt1 should read 0-60 5.5-5.7 secs. And lows 14s to high 13s in a 1/4. Your L98 would reach 0-60 round 5.8-6.1 stock , dependin on year

 

those a real times for 93 lt1's the stock l98 cars with 3.23 gears can take them in the 1/4 but, that's it the 93 lt1's are right at your door and will pass you just over the 1/4 mile. after 93 they got better (I think 93 was still obd1?) and started running mid and low 14 1/4's naturally each year seemed to get slightly better

 

Yeah a L98 3.23 can beat a early Lt1 2.73

 

The age of something doesn't really matter sometimes, fast is fast. L98's are capable of beating LT1's sometimes stock. Usually it's better to have a mod or two. L98's have more TQ at a better RPM, LT1's have more HP at a better RPM. Both have their advantages and disadvantages.

 

the LT1 torque curve is real flat, alot flatter than a L98

 

If you race an LT1, 0-60 is usually what you want if you're in an L98, because they can and have out TQed them. Of course their HP changes things some later on.

 

i agree 100 percent

 

Exactly, stoplight to stoplight, it's ugly. I've beaten a few LT1's and LS1's on the highway but it wasn't by much and it's pretty rare. Speaking of torque. I just had my car dyno'd again at a local LS1 shop. It was a special dyno day for a local F-bod board. Anyway, the 2 stock LS1 M6 birds before me put down 295-305 HP and 315-320 TQ. On my first run I put down 236 HP and before the guy pulled up the TQ number he asked me what I thought it put down. I said 330 and he laughed. So he pulls it up and it says 318 and he says that was pretty close. So I tell the guy in the car to start the pull at 3,000 RPM instead of 3,200. This time power stayed nearly the same and TQ jumped to 339. The other guy at the computer about fell over. I told him,well it's got 192,000 miles I guess I should rebuild it.

 

My old 89 Formula 350 (auto) with headers, gutted cats, k&n and a cat back couldn't beat my old 96 Formula (auto) with 3.73s and a catback no matter how many times I tried. By the time the 96 hit around 70 mph it was all over. Maybe I had a weak L98 or a strong LT1???? Although in defense of the L98, at the time it had about 90K on it while the 96 had around 40K. Still wish I'd kept the 89 though.

 

had a freind a few years ago, big fat guy(really like 275lbs).well daddy bought him a 93 auto z28. it had 3.23. and absolutly completely frickin stock. first night at the track it ran a 9.2@77 1/8 mile and it ran a 14.29 1/4. my gta ran a 9.4@75 1/8 and a 14.56 1/4. very close race. let me pose a question.......if your car makes say 330 rwtq at 2800rpm, how many times in an acceleration run are you going to be near your tq peak? just once right? so that would be when you first launch, now an accurat way to measure initial acceleration is by 60 foot right? so you should have faster 60 foot times with a tpi car right? now assuming we have two stock tire, cars who whould have quicker 60 foots the lt1 or the l98? 330rwtq and stock tires means your going to spin like crazy if you dont let out. if you let out you arnt making 330rwtq are? so how would a l98 be quicker? l98's make great low rpm torque, the kind of low end torque you need to get a load moving, becuase thats what torque does, its work.now hp on the other hand is how fast work(torque) can be done. so how is it that a car can be faster because it has more torque when hp is what makes it fast? do you think the 290-300rwtq that an lt1 makes is not adaqute to do the work of pushing its mass forward? i say l98's have an abundance of torque that isnt nessicary to make it faster.i.e. more than it needs.

horsepower is torque over an amount of time people.

we race time, not work that a motor could do if it had more of a load to pull.

how do you make a dodge cummins turbo deisel fast? make 600hp to the wheels. that would mean your making around 1500tq to the wheels. how fast is that in a 11000lb truck? 13's in the 1/4, but not from 1500tq, its from the 600hp.

 

This is why people who put big numerical gears behind a stock TPI usually end up unhappy. First, launching without tire spin is near impossible. Second, by the time you get to the finish line you're way past peak power. Second gear probably feels a lot stronger but beyond that it's a pointless move. Stock for stock, I think the TPI+3.23 gears is the better combo vs. the LT1+2.73's both being auto's that is. When I dyno'd the Camaro with only a cat-back there was a '93 auto Z with only a cat-back as well. His peak RWTQ was 310. My RWTQ was above 310 through 4,000 RPM. My peak was 336. Beyond that of course, the LT1 took over peak hp was 265, to my 241. My point is that as long as shifts occur earlier for an L98, it will run with a stock LT1. Naturally, a higher revving design like the LT1 is going to respond better to typical speed mods.

 

Its a 91, speed density, still using proms. Its about as old as your car and probably wont get stock times, also consider the driver, is he familiar with sports cars? I think this will be a close run. Obviously if the guy doesnt know how to drive he is just gonna hammer the accelerator. The lt1 pulls all the way up to 5200 rpm (at least thats when mine dropped off at the dyno). It hit 302 rwhp and 314 lbs of torque. It will be close if you can drive, but your gearing will most likely be your doom.

 

Those are some good RW numbers for an LT1. What mods?

 

Computer tune, headers, 3" exhaust w/ no cat, 1.6 RR's, spohn torque arm, spohn wonder bar, and LS1 aluminum driveshaft. I got a CC306 camshaft sitting in my closet:

232/244 lift
Intake: .544
Exhaust: .570

I can't wait to have some fun with that sucker. That cam is supposed too pull as high as 6800 rpm . I've just been too lazy.