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

Lt4 question

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Old Feb 2, 2005 | 11:06 PM
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Default Lt4 question

does all lt4s have the plaque near the gearshift saying lt4 and the horsepower rating?

where is the 5 suppose tobe in the vin number?

thanks
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Old Feb 2, 2005 | 11:07 PM
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the plaque is something you can buy from ecklers/mid america.
for any year/model corvette
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Old Feb 2, 2005 | 11:09 PM
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All the ones I've ever seen have that plaque. As far as the VIN. I thought the "5" was the start of the number sequence... or "P"... at the end of the VIN.
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Old Feb 2, 2005 | 11:18 PM
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Default lt4

anymore opinions
here?
would like to know some definite answers
thanks
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Old Feb 2, 2005 | 11:30 PM
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"5" will be the eighth digit in the VIN of an LT4 car. It'll be a "P" if it's an LT1.

No LT4s had a hp plaque on the console. Those are aftermarket.
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Old Feb 3, 2005 | 06:13 AM
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Originally Posted by 96GS#007
"5" will be the eighth digit in the VIN of an LT4 car. It'll be a "P" if it's an LT1.

No LT4s had a hp plaque on the console. Those are aftermarket.
Yup, aftermarket...

Since my LT4 didn't have the F45 suspension option, I trimmed down the HP plaque and attached it between the seat controls like so...

Last edited by wake; Feb 3, 2005 at 06:31 AM.
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Old Feb 3, 2005 | 06:50 AM
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Looks like my LT-4 brothers got this one handled.
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Old Feb 3, 2005 | 11:24 AM
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Originally Posted by lookingforvette
does all lt4s have the plaque near the gearshift saying lt4 and the horsepower rating?

where is the 5 suppose tobe in the vin number?

thanks
Another way to tell if it is an LT4 is to get a flash light and take off the oil cap. Look inside and on the head it will say LT4.
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Old Feb 3, 2005 | 11:27 AM
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From: Everyday you must choose between the pain of discipline and the pain of regret. Fredericktown, OH
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Originally Posted by qwik96GS
Another way to tell if it is an LT4 is to get a flash light and take off the oil cap. Look inside and on the head it will say LT4.
Now, THAT I did not know.
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Old Feb 3, 2005 | 12:02 PM
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Originally Posted by LT-4 CE
Now, THAT I did not know.


Now everyone go look

Last edited by qwik96GS; Feb 3, 2005 at 03:36 PM.
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Old Feb 3, 2005 | 01:52 PM
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Originally Posted by LT-4 CE
Now, THAT I did not know.



Now I need to look when I get home...
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Old Feb 3, 2005 | 04:29 PM
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Originally Posted by qwik96GS
Another way to tell if it is an LT4 is to get a flash light and take off the oil cap. Look inside and on the head it will say LT4.
Great info! I have the plaque, but I just added it this Christmas. It wasn't on the car when I bought it...
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Old Feb 3, 2005 | 05:27 PM
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Originally Posted by qwik96GS
Another way to tell if it is an LT4 is to get a flash light and take off the oil cap. Look inside and on the head it will say LT4.
Mine don't. That started with the later cars although I'm unsure of how late.

FWIW, if you really have one torn apart, late LT4 pistons have "LT4" cast on the underside but the early ones don't. I'll have to upload a pic of mine and a late LT4 piston side by side.
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Old Feb 4, 2005 | 02:16 AM
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Originally Posted by 96GS#007
Mine don't. That started with the later cars although I'm unsure of how late.

FWIW, if you really have one torn apart, late LT4 pistons have "LT4" cast on the underside but the early ones don't. I'll have to upload a pic of mine and a late LT4 piston side by side.
I wonder how late too. Mines GS #92, but don't remember what date it was built off hand.

Ron
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Old Feb 4, 2005 | 08:32 AM
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Originally Posted by qwik96GS
I wonder how late too. Mines GS #92, but don't remember what date it was built off hand.

Ron
It wouldn't surprise me if a couple months (or less) into the build, that too many mistakes were being made during assembly (ie LT1 heads on LT4 or vice versa) that the change was made. Pure speculation on my part.

Here's the piston pic I was talking about...
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Old Feb 4, 2005 | 09:35 AM
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Originally Posted by 96GS#007
"5" will be the eighth digit in the VIN of an LT4 car. It'll be a "P" if it's an LT1.

No LT4s had a hp plaque on the console. Those are aftermarket.



Larry
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