C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Oct 10, 2009 | 11:38 AM
  #21  
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I've seen 109 at the drag strip. Don't think I've ever been higher than that on the street.
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Old Oct 10, 2009 | 11:40 AM
  #22  
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140 & still climbing slowly, but ran out of road. About 120 MPH at Charlotte Motor Speedway, but was limited by the pace car up ahead.

At 140 MPH you are gobbling up the road at a rate of one mile every 25 seconds. So if you have a nice clear 3 mile stretch in front of you, you will cover it in a little over a minute. An open three mile stretch is about all you can find around here in the foothills. I get real nervous thinking about weaving in and out of traffic at 140 mph.
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Old Oct 11, 2009 | 12:02 PM
  #23  
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Originally Posted by pmihaltian
140 & still climbing slowly, but ran out of road. About 120 MPH at Charlotte Motor Speedway, but was limited by the pace car up ahead.

At 140 MPH you are gobbling up the road at a rate of one mile every 25 seconds. So if you have a nice clear 3 mile stretch in front of you, you will cover it in a little over a minute. An open three mile stretch is about all you can find around here in the foothills. I get real nervous thinking about weaving in and out of traffic at 140 mph.
You said it! That's equivalent of driving through a bunch of (perhaps-not-so)stationary objects at 70mph

Perhaps I bought a special '95? It was a nice day, and I took one of my best friends down the stretch I call the Autobahn. Im 180lbs hes 200lbs the roof was off, windows somewhat up, we hit 155mph. And it was still pulling! It was tempting to go for 160+ but an on-ramp was approaching quite rapidly, and I had a rather increasing need for aviator goggles. I decided to play it safe and hit the brakes
The car is all stock, I was running Mobile1 syn5-30, about 70degrees, sea-level, July 5th 2009

Originally Posted by 86IndyCarVette
The speedo on my 86 vert only goes to 85mph, so I can do 85+. LOL
LoL! Well stated!

At 155 the car sucks to the ground quite nicely, but any bumps/dips in the road the car tends to get a fore/aft see-saw feeling rocking. Comfortable yes, but personally I wouldn't mind a stiffer suspension.

Last edited by torchredd; Oct 11, 2009 at 12:09 PM.
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Old Oct 11, 2009 | 12:11 PM
  #24  
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149mph stock lt4.. it had more in it.
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Old Oct 11, 2009 | 12:18 PM
  #25  
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Originally Posted by joe3906
My car has plenty of oomph, more than I'll ever need.
I've been up to 180 on a Kawasaki ZZR1200 and that
quenched my thirst for speed, not to mention what it
did for my mild case of constipation.

Speed seekers and Corvettes are synonymous; anyone
who say's he bought a corvette for the color or body
lines isn't being totally honest. Having a corvette under
you with the capability of accellerating and out manuvering
most vehicles on the road is a very tough thing to resist.
The trick is to recognize all the above, use a tremendous
amount of self-control, and enjoy a vehicle that has
become a symbol for the American dream.
Very well stated!
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Old Oct 11, 2009 | 11:05 PM
  #26  
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Originally Posted by joe3906
My car has plenty of oomph, more than I'll ever need.
I've been up to 180 on a Kawasaki ZZR1200 and that
quenched my thirst for speed, not to mention what it
did for my mild case of constipation.

Speed seekers and Corvettes are synonymous; anyone
who say's he bought a corvette for the color or body
lines isn't being totally honest. Having a corvette under
you with the capability of accellerating and out manuvering
most vehicles on the road is a very tough thing to resist.
The trick is to recognize all the above, use a tremendous
amount of self-control, and enjoy a vehicle that has
become a symbol for the American dream.
I bought mine for the color & the body lines, & I`m being totaly honest
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Old Oct 11, 2009 | 11:16 PM
  #27  
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Originally Posted by pmihaltian
140 & still climbing slowly, but ran out of road. About 120 MPH at Charlotte Motor Speedway, but was limited by the pace car up ahead.
:
How in the hell do you get to go on the track? I will kill for a chance to drive my vette around Charlotte Motor Speedway...

I did however take two laps in my 97 TA at hickory motor speedway, After two laps security started turning on the lights..... car went much faster leaving the track then I did on the track..
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Old Oct 11, 2009 | 11:18 PM
  #28  
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Originally Posted by kenv
I bought mine for the color & the body lines, & I`m being totaly honest
really? I bought mine because i didnt know any better
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Old Oct 12, 2009 | 12:10 AM
  #29  
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Originally Posted by torchredd
Very well stated!
i too have had the pleasure of owning a zzr1200 and like you said it will sure give you a case of the weak stomach if your not careful. i have had my 89 at 152. its nice and comfortable on the road at that speed. its a drm 383 stroker 6speed.
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Old Oct 12, 2009 | 12:42 PM
  #30  
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Originally Posted by joe3906
My car has plenty of oomph, more than I'll ever need.
I've been up to 180 on a Kawasaki ZZR1200 and that
quenched my thirst for speed, not to mention what it
did for my mild case of constipation.

Speed seekers and Corvettes are synonymous; anyone
who say's he bought a corvette for the color or body
lines isn't being totally honest. Having a corvette under
you with the capability of accellerating and out manuvering
most vehicles on the road is a very tough thing to resist.
The trick is to recognize all the above, use a tremendous
amount of self-control, and enjoy a vehicle that has
become a symbol for the American dream.
ZZR1200 is the tourere version of the ZX12R correct? They have different engines but the ZZR version still makes 130-135hp at the rear tire. Great touring machine that will still carve corners like mad. I have a 96 GPZ1100 with a full micron exhaust and that thing makes my Vette seem like a Ford Taurus with the FFV engine....lol

I bought my Corvette for the power but more importantly because it takes me back 10 years when I had my first one that my dad gave me. I also like the power, the braking ability, the cornering, and the overall look of the car. Also I like the attention that it gathers. I have had it a month and have hit 100 in it one single time and that was it. Must add that I average over 23 mpgs with this thing and I drive it in mixed driving conditions....oh and I am 28 years old. Like you say about self-control, that is the BIGGEST thing with these cars. It is very easy to get yourself in trouble or hurt yourself or someone. Pick your spots is all I can say.

Most articles show that the Cross-Fire cars are 140+mph, the Tuned ports were 150-155, and the LT1's are 160-165mph. Plenty fast even by todays standards let alone 20+ years ago.
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Old Oct 12, 2009 | 01:45 PM
  #31  
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Originally Posted by TLS_Addict
ZZR1200 is the tourere version of the ZX12R correct? They have different engines but the ZZR version still makes 130-135hp at the rear tire. Great touring machine that will still carve corners like mad. I have a 96 GPZ1100 with a full micron exhaust and that thing makes my Vette seem like a Ford Taurus with the FFV engine....lol

I bought my Corvette for the power but more importantly because it takes me back 10 years when I had my first one that my dad gave me. I also like the power, the braking ability, the cornering, and the overall look of the car. Also I like the attention that it gathers. I have had it a month and have hit 100 in it one single time and that was it. Must add that I average over 23 mpgs with this thing and I drive it in mixed driving conditions....oh and I am 28 years old. Like you say about self-control, that is the BIGGEST thing with these cars. It is very easy to get yourself in trouble or hurt yourself or someone. Pick your spots is all I can say.

Most articles show that the Cross-Fire cars are 140+mph, the Tuned ports were 150-155, and the LT1's are 160-165mph. Plenty fast even by todays standards let alone 20+ years ago.
Shows that the aerodynamics are pretty decent since a 50-60 hp increase resulted in another 10 mph or so on the top end......some vehicles reach a point where the addition (realistic ) of more power does not increase top end. I've been about 20 MPH faster than your LT1 mph however, that was at a high altitude. I'm starting to believe thath the decrease in air resistance around 6,000 ft, more than counteracts the loss in HP when it comes to top end speed. Having a modified engine did not hurt either.

Last edited by aboatguy; Oct 12, 2009 at 02:15 PM.
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Old Oct 12, 2009 | 02:07 PM
  #32  
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Originally Posted by aboatguy
Shows that the aerodynamics are pretty decent since a 50-60 hp increase resulted in another 10 mph or so on the top end......some vehicles reach a point where the addition (realistic ) of more power does not increase top end. I've been about 20 MPH faster than your LT1 mph however, that was at a high altitude. I'm starting to believe thath the decrease in air resistance around 6,000 ft, more than counteracts the loss in HP when it comes to top end speed. Having a modified engine did not hurt either.
I agree 100%....I think a lot of it is where the horse power IS made in the engine. If your engine is peaking at a higher RPM I would think that it would help more as speed increases over a mid RPM power car.

Either way 150mph is FAST by any standards.
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Old Oct 12, 2009 | 02:27 PM
  #33  
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Originally Posted by speedoholic
How in the hell do you get to go on the track? I will kill for a chance to drive my vette around Charlotte Motor Speedway...
The NCRS had a regional judging event at CMS this past May. They had a regional event at CMS two years ago also. On Friday evening of the event, they clear the track and let the guys drive their Vette's around for several fast track laps.

You had to pay a small up front fee and sign a waiver. They had a NASCAR Cup Car as the pace car. I think one of the Bodine boys was driving the pace car. I don't know how fast the pace car was going, but I suspect that he was in the 100 - 110 mph range.

What you could do was lag back substantially thereby letting the pace car get most of the way down the back or front stretch and then nail it coming out of turn one. This lets you come full throttle out of turns 1 & 2 and most of the way down the straight. I could get almost to turn 3 before I had to slam on my Gerlock ABS to keep from hitting the car in front of me. This process netted me between 116 - 120 mph before I had to slow. The guys with the new Z06's were hitting 135-140 on the back straight and Roy Sinor, in his new ZR1, hit 165 on the back stretch.

NCRS is having their National Convention at CMS this coming July and I am sure that they will have Track Fast Laps for the attending members. Hopefully, I'll see you there.
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Old Oct 12, 2009 | 03:45 PM
  #34  
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Seen around 150 with the top off - on a closed course, of course.
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Old Oct 12, 2009 | 04:12 PM
  #35  
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Two years ago saw 125 on the front straight at Roebling Road.
I was loafing last time at VIR, it was less than that on the back straight. I was really loafing trying to sort the car out after major updates to the chassis. I did make it up the esses around 100, which is a better indication of chassis setup.

Its been through its shakedown tests, We'll see what she does on CMP, Road Atl and Roebling Nov and Dec.
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Old Oct 13, 2009 | 06:50 PM
  #36  
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my 92 coupe will go 157 all out in an auto and it dynoed last week 260 rwhp.its bone stock and it takes a few miles.motortrend tested several c-4s that broke 160.and yes it feels unstable at that speed.do i like it yes and no,id rather my car was much quicker so im swapping the d36 for a ford 9 with 3.89 gears.




and on another note i cant imagine why anyone who owns a c-4 has never seen the otherside of 140??????????????????

Last edited by c-4 lhozwalte; Oct 13, 2009 at 06:52 PM.
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Old Oct 13, 2009 | 07:20 PM
  #37  
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[QUOTE=id rather my car was much quicker so I'm swapping the d36 for a ford 9 with 3.89 gears.QUOTE]



pmihaltian: Yeah I will be their, should work out perfect. By July my car should be finished, I hope. You set me a goal, Now Ive got something more to work toward. CMS is only about 30mins from my house. funny part is, Ive never been their. Never been real big on nascar, I do love short track racing and have been to 90% of the tracks in NC and a few in SC. I would rather watch a short track race over nascar any day..... But I would rather drive on a nascar track.

Do they make you have any safety equipment? And can people ride along with you? My wife's birthday is in July and see wants the Richard petty driving experience for her birthday.

Thanks for the info Hope to see you their.
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Old Oct 13, 2009 | 07:50 PM
  #38  
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I've got a timing slip @ Bonneville for 134.5 MPH

Unofficially its seen 146.

Oh, that's a 1986e factory L98 with 120K on the clock.

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Old Oct 13, 2009 | 07:51 PM
  #39  
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140 is easy in my '94 - heck, it'll hit 100 before the end of the entrance ramp onto the freeway (routinely). If you own a vette and do not drive it fast you may as well stash your 'nads in a safe in your closet because you just don't need 'em.
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Old Oct 13, 2009 | 08:40 PM
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I hope to top 155 in a mile or so in a few days......
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