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

C4 modifications?

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Old Dec 1, 2012 | 12:46 PM
  #21  
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I would have to agree with you about that.

Yes I have a mechanical shop and two of the handiest country boys with a wrench that you will ever meet. One is a GM trained tech and the other one if you ask him what time it is he'll build you a watch.

I'm not Donald Trump (who would really want to be anyway) but I'm not pleading poverty.
If it costs a little...it costs a little. I just dont want to tear the engine completely down and start over when this car is nice and tight and runs good. Honestly as busy as we are I haven't had the time to really look into it...I was just trying to find a starting point and get some ideas.

I am not afraid to ask anyone a question...
Old Dec 1, 2012 | 12:50 PM
  #22  
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Torch...since I got my 1995 c4 LT1 I have fell in love with all Corvettes....

I have my eye on a nice clean 2004 with low miles right now...Problem is I will have to find a good divorce attorney if I bring another toy home.

Anyone know a good attorney...its a beautiful car...I'm just sayin
Old Dec 1, 2012 | 12:54 PM
  #23  
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According to Car and Driver a stock 1992 Corvette with the LT1 engine will attain 157 MPH.

See this: http://www.corvetteactioncenter.com/...l#.ULpDG2drfNE

I know the owner of this site personally. He has connections with GM/Corvette and does not post anything unless the source is verified and the information is accurate.

So, you are definitely right where you should be.

Does not mean you cannot sweeten the pot!
Old Dec 1, 2012 | 01:09 PM
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Originally Posted by Hipsterdoofus
Torch...since I got my 1995 c4 LT1 I have fell in love with all Corvettes....

I have my eye on a nice clean 2004 with low miles right now...Problem is I will have to find a good divorce attorney if I bring another toy home.

Anyone know a good attorney...its a beautiful car...I'm just sayin
It is always easier to beg forgiveness than to ask permission....
Old Dec 1, 2012 | 01:42 PM
  #25  
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I'm a beggin fool too...Jtown we have the same exact car polo green too! cept I chromed the rims
Old Dec 1, 2012 | 01:47 PM
  #26  
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Originally Posted by TorchRedlt4man
According to Car and Driver a stock 1992 Corvette with the LT1 engine will attain 157 MPH.

See this: http://www.corvetteactioncenter.com/...l#.ULpDG2drfNE

I know the owner of this site personally. He has connections with GM/Corvette and does not post anything unless the source is verified and the information is accurate.

So, you are definitely right where you should be.

Does not mean you cannot sweeten the pot!
Torch...I have seen these numbers b4 and it only has the 92 speed numbers I believe...the 95 shows several different gear ratios and I
would think that would make a huge difference as well as trans. Thanks for the link though...I will bookmark it for future reference

Last edited by Hipsterdoofus; Dec 1, 2012 at 01:51 PM. Reason: forgot
Old Dec 1, 2012 | 02:01 PM
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put a mark on the drive shaft. jack the rear tires up. Spin the driveshaft one turn while counting the number of turns the wheel makes. That will you you a" close enought to guess" idea of your rearend. 50 something MM intake, good set of heads and intake, headers and dual exhaust should get you a bit higher.
Old Dec 1, 2012 | 02:33 PM
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Originally Posted by ghoastrider1
put a mark on the drive shaft. jack the rear tires up. Spin the driveshaft one turn while counting the number of turns the wheel makes. That will you you a" close enought to guess" idea of your rearend. 50 something MM intake, good set of heads and intake, headers and dual exhaust should get you a bit higher.
Using the link from Torch man...the service parts id tag says it
G44 which means it is a 3.07 Ratio
G92 is a "performance axle ratio" (whatever that is)
M30 4 speed auto tr. 4L60E

LT1 engine
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Old Dec 1, 2012 | 03:49 PM
  #29  
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Originally Posted by Hipsterdoofus
I would have to agree with you about that.

Yes I have a mechanical shop and two of the handiest country boys with a wrench that you will ever meet. One is a GM trained tech and the other one if you ask him what time it is he'll build you a watch.

I'm not Donald Trump (who would really want to be anyway) but I'm not pleading poverty.
If it costs a little...it costs a little. I just dont want to tear the engine completely down and start over when this car is nice and tight and runs good. Honestly as busy as we are I haven't had the time to really look into it...I was just trying to find a starting point and get some ideas.

I am not afraid to ask anyone a question...
This site will help you out a lot. Lots of good people here (the c4 section) who have helped me out immensely and I try to pass that info back on (and also new stuff i learn).

There is something new I learn about this car everyday. Im always finding neat features that GM would now be too-cheap to incorporate.

However, this is a very different car than what most GM-certified mechanics are used to.

Id be afraid to take it to a dealer. They just dont know or have the patience.

They need to get onto this website and ask questions to correctly diagnose c4 problems.

If they have been at the dealer a long time and used to work on c4's, then they have forgotten how to work on them.

Working on these cars is an art/science mixture.

You'll be better getting a NOS part than something at autozone for this car.

Also, just because you went to the dealer and paid top dollar for an AC Delco part doesnt mean its the same part that came on the car.

You need to know simple stuff such as how to identify a new old stock AC Delco part, vs. a made-in-china AC Delco replacement part.

Or if you are forced to buy a replacement part (vs. new old stock), knowing which ones work and which ones dont.

Weatherstrip is a great example of that.
You will need the forum to know what other members experience with each part is.

Or certain mechanical steps.

An example is how to replace the lt-1 timing cover without damaging the water pump driveshaft seal. You can do a search on here and see how the proper size marker cap can be slid over the waterpump shaft to keep the seal (on the timing cover) from folding over while you install the timing cover.

Crazy.

Stick with us, and we will help out!
Old Dec 1, 2012 | 04:11 PM
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Originally Posted by TorchRedlt4man
According to Car and Driver a stock 1992 Corvette with the LT1 engine will attain 157 MPH.
I trust these guys better with their measurement method vs. C&D.

LT-1 vette even outran the Acura NSX.

Perhaps they should have ran a zr-1 there too (and watched it get out ran) j/k


Last edited by dizwiz24; Dec 1, 2012 at 04:14 PM.
Old Dec 1, 2012 | 04:27 PM
  #31  
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Originally Posted by Hipsterdoofus

I have a really good friend that sold chevy's for years and years and he thought that it wouldn't let you go over 153 without a chip or download. The car climbs pretty good until 155 and then just stops...no engine cut out or noticeable shut down, although I just run it up until it hits 155 and immediately shut it down.
There is no speed limiter on the '95 Corvette.
If your car stops at 155, then something has been done to it.
Also as mentioned, after 17 years it just could be a little "tired".
Old Dec 1, 2012 | 04:31 PM
  #32  
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Originally Posted by Hipsterdoofus
I'm a beggin fool too...Jtown we have the same exact car polo green too! cept I chromed the rims
Actually... I bought some chrome wheels here on the forum. One needed welded, it had a small crack. That is done, at some point this winter I will have the tires switched.... Something about a Corvette with chrome wheels. In fact I am gonna eventually buy a set of chrome rally wheels for my old man's 72, but it needs some other things before a new set of wheels... like brake lines and calipers, exhaust and tires... I hunted for a polo green with a tan gut because the old man's car is green and tan... I wanted them to match. Now that I have chrome wheels for mine, it only makes sense to go with chrome rallys for the old girl, no?
Old Dec 1, 2012 | 04:56 PM
  #33  
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One of the mods at that speed should be a rollcage. A sudden stop at that speed, on the roads (insane) or at the track, I want some kind of protection, for a mishap.
Randy

Last edited by rlane5; Dec 23, 2012 at 01:25 AM. Reason: mispelled
Old Dec 1, 2012 | 08:45 PM
  #34  
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Jtown...I agree...many of my friends are the "all aluminum" kind of guys but call me what you want but some nice chrome added in the right proportion is a beautiful thing to me...cheers

Rlane...agreed
Old Dec 1, 2012 | 09:22 PM
  #35  
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1 mod LSX Who didn't know that was coming?

Old Dec 23, 2012 | 12:56 AM
  #36  
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Originally Posted by Hipsterdoofus
Workin on it Torch...I should say that my LT1 has tunable exhaust (power effects),auto trans, not sure of the gears. I havent been able to have a long visit with the original owner but do know that he did "some things".

my "thing" is I just like to go fast, dont really like beating a car up on rough back roads and all but I live in Texas and there are some loooonnng open stretches of road that really make it hard to not put your foot in it hard.

I read the same article diz did. I have heard that it is pushing upwards of over 170 top speed.

I have a really good friend that sold chevy's for years and years and he thought that it wouldn't let you go over 153 without a chip or download. The car climbs pretty good until 155 and then just stops...no engine cut out or noticeable shut down, although I just run it up until it hits 155 and immediately shut it down.
So just to clarify... you want to know how you can go faster than 155mph down the highway with wheel bearings (and countless other parts) that I am willing to bet haven't been checked in almost 20 years, anemic brakes most likely outfitted with pads from some parts place that don't have a snowball's chance in hell of actually stopping from that speed, lines that are 20 years old, and all without the slightest hint of safety equipment.


Wow. Just... wow.
Old Dec 23, 2012 | 09:40 AM
  #37  
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Originally Posted by Hipsterdoofus
Using the link from Torch man...the service parts id tag says it
G44 which means it is a 3.07 Ratio
G92 is a "performance axle ratio" (whatever that is)
M30 4 speed auto tr. 4L60E

LT1 engine
The first 1992 LT1/Automatic equipped Vettes built all came with 3.07 differential ratios. Mine came that way & I believe my build number was just over 5,000. I took delivery in November 1991.

Then Chevy started putting the 2.59 ratio into the automatic Vette.

The 3.07 ratio became the "Performance Axle Ratio".

I believe this was done specifically to raise the fuel mileage numbers.

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Old Dec 23, 2012 | 09:46 AM
  #38  
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Originally Posted by RedLS1GTO
So just to clarify... you want to know how you can go faster than 155mph down the highway with wheel bearings (and countless other parts) that I am willing to bet haven't been checked in almost 20 years, anemic brakes most likely outfitted with pads from some parts place that don't have a snowball's chance in hell of actually stopping from that speed, lines that are 20 years old, and all without the slightest hint of safety equipment.


Wow. Just... wow.
Isn't that againt the rules? for someone who used to be a moderator you would think the first thing they would do is read the rules and abide by them.
Old Dec 23, 2012 | 10:20 AM
  #39  
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I would invest in more life insurance for the wife and kids if you have them.. I would take the time to pull all the suspension and clean and check it all over very carefully zyglo the a-arms and dog bones in the rear new bushing all the way around good brake pads rebuild calipers new wheel bearings and not the cheapos. Fresh tires etc. if you want to go that fast do it in a well preped car. Being new to you does not make it a new car.
Old Dec 23, 2012 | 10:26 AM
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Originally Posted by RedLS1GTO
So just to clarify... you want to know how you can go faster than 155mph down the highway with wheel bearings (and countless other parts) that I am willing to bet haven't been checked in almost 20 years, anemic brakes most likely outfitted with pads from some parts place that don't have a snowball's chance in hell of actually stopping from that speed, lines that are 20 years old, and all without the slightest hint of safety equipment.


Wow. Just... wow.
How much are you willing to bet?



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