no_car_yet

How bad would one beat me in a race?

Note when my car comes out of storage it will have a new big cam in it with full new high perf. valvetrain along with fully ported intake and the heads will also be ported with bigger valves, plus what i have in my sig.

no_car_yet

I mean like a 90-92 vette, not a ZR1

costill91Z

need more info

if he's a 90-91 vette he has an l98, and it will be closer
92 and on, he's got the lt1- you'll lose by about 2 cars or more id guess

and do you have a 5spd on your gta?, if you have the 305 auto, and 2.73 gears, you're toast
what tranny does he have?

no_car_yet

well, hes getting that type of car so i am not sure what he'll end up with. yes i do have a 305 auto. i am getting a shift kit also over the winter and the cars has had the gears changed to 3.27's. that should help?

no_car_yet

so how much does a corvette weigh? i am pretty sure that when i get my cam and stuf in i should have more hp, if he has the L98 anyway.

I guess you people voting pretty even are thinking its a L98 auto, and someone said whipp you bad so i guess that would be for the LT1 6-speed ?

1991tealRSt-topGuy

i'd have to say the vette.......

MdFormula350

i voted for the corvette beats by alittle.. if it is a L98 with auto..

corvette were pretty fast those years..

no_car_yet

if i put in a high stall converter? saya 2400? would that help me keep even witha L98 auto vette?

tpivette89

dont underestimate an L98 Vette. mines an auto with the TPI motor and i ran the car 100% bone stock and came up with a 13.9 at 99mph. what does your car run? i doubt a lightly modded 305 could match those times

no_car_yet

and you are right. but i was thinking with the mods i plan, cam, tc,valvetrain, i might be able to run a low 14? and maybe if the vette never had good traction iand i did.

BikertrashDude

the Vette, unless he don't know how to drive.
biker

LYV18F

depends on the race...

won't do anything for you on the highway

no_car_yet

nah, i am not really ioto highway racing, i just like to race from say 0-100mph and then back off i spose

Marc 85Z28

iTrader: (3)

Not the ones I've run. I beat them almost as bad as 96-98 4.6 GT's. The 2 races I've had with the LT1's came out with me up by one length to 100 or so. I don't think I've ever raced a manual trans Vette, other than an LS6 - and that wan't fair

no_car_yet

i see that"corvette wipps you bad" seems to be a popular choice. are you people counting for it being non-ZR1, the mods i plan over the winter, and the vette being a L98 auto

tpivette89

you must race some really crappy drivers. on corvetteforum there are alot of LT1 autos into the low 13s 100% stock. those 4.6 GTs you are talking about run AT BEST high 14s. so theres a good second difference between that and a L98 Vette. you cant really compare the 2 cars when theyre that far apart in performance

youve got quite a few mods in your sig, what does your car run? maybe that would explain why its easy to walk away from LT1 Vettes. i also noticed your from MD. have you ever raced at Cecil County Dragway in Rising Sun?

zerotosixtyV8

I smoked an 85 TPI Vette. Well, I shouldn't say smoked, cause his nose was on my tail, but I beat him. The old guy driving it gave me a thumbs up afterwards. It was really close, and we both hooked up well. His was an auto too, so I'm assuming 14.8-14.9 for the 85. a 1990 is supposed to run a 14.1-14.2 with a 6-speed, so I don't think a 350 IROC, much less a 305 would be able to take it on. a A4 L98 Vette is basically an IROC-Z though.

tpivette89

not really, there are quite a few differences. first off, an IROC is about 200-300lbs heavier than a C4. also, a TPI equipped Vette has a better air intake and exhaust system than a IROC has. finally, and this is the biggest difference of all, is the Vettes aluminum cylinder head (the true L98 casting), availible on all Vettes from late 86' on up. these not only saved weight, but also bumped compression and flowed much better than the iron Fbody L98 cylinder head. combine these engine differences with the Corvettes much wider tires (better traction) and its pretty easy to see why they are faster at the strip

1988z51vette

you would lose.

1991tealRSt-topGuy

Marc 85Z28

iTrader: (3)

Crappy drivers? That's what I thought... But the same results kept happening. I have driven a 85 and and 89 Vette. The 85 felt like a 15 flat (115K miles), and the 89 wasn't much quicker with few miles and in excellent condition.

It has run a best of 13.8. It's a consistent 13.9-14.0 car. Best MPH at 99. That's before the trans and converter, SLP headers (had Edelbrock) and Nitto DR's. By no means a street rocket, but it will hold it's own. And I usually run at Cecil. Capital is much closer and no tolls, but Cecil is much nicer.

Most TPI Vette's that I've seen run are high 14's and some even in the 15's. I've NEVER seen a LT1 Vette run low 13's stock. Most are high 13's at BEST. In fact, very few LS1's can run low 13's. I'm not saying it hasn't been done - there was just no one there to see it. Stock of course - once modded everything goes out the window.

2 months ago I watched 2 trailers pull into Capital. Out rolled a mid 90's Vette and a 91 I think (rounded tail with quad tips). I thought man, I'm gonna see a couple of quick cars. NOPE. Both were low 12 second cars. Most people in the lanes were laughing.

The most impressive Vette I've seen was a 88. Ran a 13.7@101 I think? I talked to the guy and he told me it had the better gears (couldn't tell me what ratio though ), MAF, pressure regulator, and runners. That was on Goodyear Eagle F1's.

tpivette89

come down to Cecil this Fri, youll see a L98 run much better than a 13.7. ill be there testing out my newest mods. see my sig for my old times. like i said before, mine ran a 13.9 at 99mph 100% stock. my brother has a 91' (same motor) that ran a 14.0 also stock. you have witnessed crappy drivers. go to www.corvetteforum.com to see what experienced drag racers run in stock corvettes

Marc 85Z28

iTrader: (3)

I doubt I'll be able to make it Friday night. I couldn't get there until at leat 9 due to work... After the holidays were not as busy here at work and I get off earlier in the spring. We could meet up in the spring, but I'll be more than a second quicker by then I do however run around Ritchie Hwy some nights and will gladly run any C4 I come across.

I checked out the site. Some of those times are REAL hard to swallow. Some are listed quicker than Z06's. Times posted in people sig's are real hard to believe, especially when everything you see in person contradicts it. I don't think I manage to run every crappy Corvette driver. Most of the TPI's barely spin the tires! They chirp and GO. Given an even launch they're dead even with me up till I hit second and they fall back. One of the above mentioned LT1's was powerbraking, launched at half throttle or so and nailed it half way through first. He obviously practiced.

zerotosixtyV8

how so? aside from better aerodynamics and IDRS, and 10 HP gain with aluminum heads, what's the difference?

zerotosixtyV8

how so? aside from better aerodynamics and IDRS, and 10 HP gain with aluminum heads, what's the difference? It's only a tiny bit faster than the IROC and has an ungoverned 170 MPH top speed. A new SS is just a tiny bit slower than a C5, the C5 starts pulling ahead at like 90 mph by a bit, an SS would beat it off the line.

LYV18F

suspension.


you think they put that crazy sh*t with the iron ***** in it in a camaro? i don't...

Marc 85Z28

iTrader: (3)

170 huh? From a measly 250HP? The LS1 has over 100 more HP and better gearing, better aerodynamics and tops out a 175. 170 MPH from 250 HP

zerotosixtyV8

hehe, I saw a police video where they were chasing a mid 80s Corvette and the chopper was pinging it at about 170 MPH with radar. no idea if it was stock, but 170 MPH

GTATransAM

Was that the vette that slipped and smashed a truck from behind? I think it was like on a Arizona highway or some desert? Black or Red color Vette?

zerotosixtyV8

I thinkso, I only remember the chopper guy saying "he's doin about 170", it would make sense. And doesn't a C4 weigh like 3300 lbs? that's about the same as an IROC...

tpivette89

C4s weigh between 3000-3200 lbs. IROCS are about 300 lbs heavier (3300-3500)

1991tealRSt-topGuy

you must be the type of person who belives everything you read in magazines, huh?

thats sad

1991tealRSt-topGuy

hmmm differences?

rack&pinion VS. gear box steering
IRS VS. solid rear
german designed 6 speed VS. T5 (need i say more)
92+ had ASR
all 86+ vettes also got ABS

thats alot MORE than an IROC...........

engines aint everything, bub

zerotosixtyV8

I am having a lot of trouble buying this...LT1s weigh 3500 lbs, but they have a lot more bulk than an IROC. and the 305s are supposed to weigh about 3200 lbs...A C4 wasn't light despite being small. The C5 weighs less than it.

tpivette89

doubt me if you want to. i own both and have had both cars weighed at the track. show me YOUR proof that im wrong. why dont you go to the TPI board and ask them how much the typical IROC or GTA weighs

Marc 85Z28

iTrader: (3)

Magazines? Yes, I do quote them from time to time, but do not take them as gospel. They are interesting to look at.

I know for a FACT that a stock TPI Vette will not hit 170 MPH. Not magazine data, it's called Physics. 250 HP will not push that Vette to 170 MPH - PERIOD. While I have driven TPI Vettes, I've never attempted a top speed run. I do however know a couple of C4 owners, and they would agree. An LT1 might come close, but not a TPI.

tpivette89 What's your opinion on this?

IROCZTWENTYGR8

iTrader: (1)

From the Tech Data:

IROC-Z 350 5.7 Automatic Overdrive: 3,341lbs. (Unoptioned)

The Corvette will win here IMO. It does have an L98 that has slightly more power than the Camaros L98 and the car weighs less. They are usually .2-.4's faster than L98 Camaros considering both are good running cars. Even with the mods I'd say the 305 TPI isn't gonna win, but you might not lose by that much of a distance.

tpivette89

want my .02 huh? 170mph? certainly not. LS1s top out somewhere in the low 170s. a TPI Vette will go somewhere between 150 and 160

12sMustang

I don't see 170 from a C4. I put that you'd win by a bit, but I think this is only the case if you do an experienced port job on the heads and intake, and choose the right cam. Despite claims of 13.9s, this, I believe, is not average. The old stock 5.0 I had ran even with them on the highway, and pulled on one. The 90-92s are overestimated IMHO. It will be very close, and I wouldn't be surprise which ever way it turned out unless the race was a blow out.

Chris

TPIterror

When my car was running stronger, I raced an 88-90 L98 auto Vette and beat it. I also raced a 96 LT1 auto vette and lost by a 1/2 a car length twice. I'd say both cars were stock, but the L98 had custom rims and a spoiler, so maybe he had some mods.

This makes sense because at the time, my car was running dead even with or barely beating LT1 auto Camaro and Firebirds.