DiscerningZ32

Alright. I feel childish posting this, but I'd really like to do it myself.

I was wondering if it was possible to run a 4l60e C5 coupe or FRC to 200mph or faster (201mph, lol).

This of course would require full throttle in overdrive. Could the 4l60e handle this with roughly 500-600 at the wheels?

I'm worried I'm a speed junky, but I'd like to build up a car to pop that 200 mph mark (ON A TRACK, not on the street, I'm not that stupid).

I figure given the c5 coupe's low drag coefficient, and .7:1 over drive gear that it could be possible with the right rear gear and enough power.

I've been toying with top speed calculators (tires, gear ratios, drag coefficient, etc) and I think it might be possible.

Has anyone ever tried this. Has anyone tried it in an Automatic?

What do you guys think. What do you think it would take?
I'd hate to have to resort to buying a supra...LOL/JK

On a side note, how fast will/has a stock/modded c5 auto gone?

Thanks for any info/advice!

crmartin99

iTrader: (3)

on a stock trans you'd burn up the 3-4 clutches trying. That's for sure!

DiscerningZ32

Assuming the trans holds, or was built to hold it (or replaced for a 4l80e) does anyone think it's possible?

98RedBird

iTrader: (77)

I'd think you'd run out of gear... but if not I'm sure you could build the 4L60 to handle it, at least a few times. But then comes the question of why? I might be the minority but I get more of a thrill out of acceleration than I do overall speed.

DiscerningZ32

Really?

Over drive is a .7:1
With the proper tires and appropriate rear gear it should THEORETICALLY run to 200+mph.

I know this is all hypothetical, but i'd REALY like to buy and build a car for top speed now.
I've lost interest in the 1420, roadcourses, etc and I've always been a bit of a speed junky I think.

Would I be better going with a T-56 C5? (I prefer autos though...)
I mean, isn't 5th for a t-56 .8?:1 and 6th basically useless?
Can the C5 hit 200mph with the right mods or should I go with a different car?

rotary1307cc

iTrader: (5)

with a 4l60 built to hold OD i see you having no problem at all...

Id surely think that around 450 whp, or a bit less would push you there in a c5

rotary1307cc

iTrader: (5)

I thought they were a 3.42 rear gear, but i may be wrong.... if thats the case he def has enough gear



the C5 is a good platform to do what you are asking, i wouldn't look elsewhere

Kmaroman

iTrader: (1)

i knew this girl at school who always said her dads vet could do 170 easy, i kind of doubted her cause it was a late 80s

00cls1camaross

iTrader: (10)

Are you on a stock stall?

98RedBird

iTrader: (77)

Yeah, in that case you should have enough gear to get you there, I didn't realize that was the ratio for overdrive, you're right, theoretically you should have the gear but also, yes, a T56 would be better suited for that kind of run than a 4L60 would.

And yes, a c5 can get there with the right mods. The great aerodynamics of the car would help out an amazing amount from 100 on. What I would be most concerned with if I were you would be the car losing a considerable amount of stability at those speeds.

DiscerningZ32

This is assuming everything on the car starts out stock.

I don't know if I'd go with a higher stall, it might complicate things.

I haven't decided on what c5 to go with, or to go with a C5 at all.

Stability is my main concern with whatever I go with.

I wish I could find someone else who has done this in a c5, but alas I can't.

It looks like I'm going to be on my own on this one, hopefully redline or vette doctors in NY will have some ideas. But they don't know my plans just yet... lol!

I'll see if anyone knows on corvetteforums

Blazingz28

iTrader: (5)

I have figured out your problem..

Buy a c6 z06, fill up with gas, go to track, hit 200 mph

white02ws6

iTrader: (7)

fixed it. stock c6 z06 wont it 200.

rotary1307cc

iTrader: (5)

stall would make no difference....

you would be running in OD and you would want the converter locked

you would need a tranny to hold OD, and a converter with a good lockup clutch.... wouldn't matter what your stall is

rotary1307cc

iTrader: (5)

a stock ls7 c6 zo6 will......

TireSm0ke

iTrader: (1)

You just need a converter that can handle lockup at in OD at WOT.... Theoretically the car should get there no problem but once you hit around 150 the car will be fighting for every mph... good luck though

white02ws6

iTrader: (7)

I'm not trying to hijack dudes thread, but if the C6 Z06 will do 200 why does gm claim the ZR1 as the first production corvette to break 200? i know the top speed was close but not quite 200.

the_merv

iTrader: (88)

4th in the 4LsittyE is .70:1
5th in the C5 Vette T56 is .74:1, 6th is .50:1

A Stall won't matter, Stock will work just the same as an Aftermarket one as long as the Lockup works.

Depends on what Gears you have in the back, I would trust a T56 to pull that task easier than a A4 ever..4th in the A4 won't hold it..it'll burn up.

the_merv

iTrader: (88)

That's cause they test top speed in 5th, not 6th.

00cls1camaross

iTrader: (10)

stall makes a difference if your at 100% throttle and it unlocks. You would need to make sure that the converter is locked in 4th. Also a smaller 9.5" stall will be less rotating mass... That makes a difference.