1989 Factory HP Rating?
Team Owner
Joined: May 2001
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From: ...tearing up the highways, one state at a time™®©
Originally Posted by LIVIN KC
The console plate on my 1989 reads 250 HP and 10.1 Compression.
Why do I not see this in any factory specs?
Why do I not see this in any factory specs?
Here are the accurate specs: http://www.corvetteactioncenter.com/...9/89specs.html
Safety Car
Joined: Sep 2000
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From: Hinckley Ohio
Originally Posted by *89x2*
that was not correct, that is why.
Here are the accurate specs: http://www.corvetteactioncenter.com/...9/89specs.html
Here are the accurate specs: http://www.corvetteactioncenter.com/...9/89specs.html
1989 was either 240 or 245......not 250
Drifting
Joined: Apr 2005
Posts: 1,283
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From: New York
This is interesting, for my 1991 it shows 245, 250 HP depending on where in the production run it was. I don't see any differences in the mechanicals of the motor, so the only thing I can figure is that it must have been a different tune with the chip.
I also think it may have something to do with what gear ratio that is in the car, which leads me to believe it was the tune.
I also think it may have something to do with what gear ratio that is in the car, which leads me to believe it was the tune.
Team Owner
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From: ...tearing up the highways, one state at a time™®©
Originally Posted by KODAVETTE
This is interesting, for my 1991 it shows 245, 250 HP depending on where in the production run it was. I don't see any differences in the mechanicals of the motor, so the only thing I can figure is that it must have been a different tune with the chip.
I also think it may have something to do with what gear ratio that is in the car, which leads me to believe it was the tune.
I also think it may have something to do with what gear ratio that is in the car, which leads me to believe it was the tune.
Team Owner
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From: ...tearing up the highways, one state at a time™®©
Originally Posted by BADDUCK
My 1989 shows 245HP and 9.5:1 compression. It's a 6 speed w/3.54 gears.
^^^ Sport mufflers
The 2.xx series geared cars, had one outlet on each muffler plugged shut to reduce (eliminate) drone
3.07 automatics and the stick shift cars had sport cans out back
Le Mans Master
Joined: Jan 2004
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From: Why are there squished peanut butter cups in my underware?
Originally Posted by *89x2*
It has to do w/ sport mufflers and gear ratios.
The 2.xx series geared cars, had one outlet on each muffler plugged shut to reduce (eliminate) drone.
3.07 automatics and the stick shift cars had sport cans out back.
The 2.xx series geared cars, had one outlet on each muffler plugged shut to reduce (eliminate) drone.
3.07 automatics and the stick shift cars had sport cans out back.
The gospel has spoken! 
BTW, sport mufflers were restricted to coupes only.
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Le Mans Master
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From: Less Talk, More WOT | Houston TX
Originally Posted by juanathandavid
Since we are discussing factory '89 specs, what does a healthy '89/4L60/3.07's run in the 1/4 mile? What about 0-60?
Thread Starter
3rd Gear
Joined: Nov 2006
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From: Pensacola FL
Guess the factory plate is wrong . .
Thanks for the replies. I have studied the 89 engine specs very carefully and do not understand why my console plate reads as it does.
I have yet to find another 89 in my area with the same plate.
Curiosity just has me . . sorry.
I have yet to find another 89 in my area with the same plate.
Curiosity just has me . . sorry.
Safety Car
Joined: Sep 2000
Posts: 3,524
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From: Hinckley Ohio
Originally Posted by LIVIN KC
Thanks for the replies. I have studied the 89 engine specs very carefully and do not understand why my console plate reads as it does.
I have yet to find another 89 in my area with the same plate.
Curiosity just has me . . sorry.
I have yet to find another 89 in my area with the same plate.
Curiosity just has me . . sorry.
the L98 engine did become available as a 250hp engine, but not in 1989, so someone installed an incorrect aftermarket console plate..
Team Owner
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From: ...tearing up the highways, one state at a time™®©
Originally Posted by LT4BUD
The console plate is not factory....it is aftermarket so it could say anything......
the L98 engine did become available as a 250hp engine, but not in 1989, so someone installed an incorrect aftermarket console plate..
the L98 engine did become available as a 250hp engine, but not in 1989, so someone installed an incorrect aftermarket console plate..
certainly NOT a factory item.
Burning Brakes
Joined: Apr 2005
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From: JUPITER FLORIDA
Originally Posted by *89x2*
that was not correct, that is why.
Here are the accurate specs: http://www.corvetteactioncenter.com/...9/89specs.html
Here are the accurate specs: http://www.corvetteactioncenter.com/...9/89specs.html
Team Owner
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Originally Posted by cplonner
Are the gear ratios on that site right? i have heard from many different people different information.
The 2nd gear ratio for the 700 does not match anything I have, and the 3rd gear ratio for the M6 doesnt either. Unless these have been altered from year to year...which is not unlikely.
Last edited by vader86; Nov 14, 2006 at 10:04 PM.
Le Mans Master
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From: Why are there squished peanut butter cups in my underware?
All rear axle ratios for the `89 model year.
2.59 base auto coupes & verts
2.73 performance axle auto verts
3.07 performance axle auto coupes
3.33 most 6-sp manual coupes & verts
3.54 early 6-sp manual coupes & verts, and the ZR-1 prototypes
2.59 base auto coupes & verts
2.73 performance axle auto verts
3.07 performance axle auto coupes
3.33 most 6-sp manual coupes & verts
3.54 early 6-sp manual coupes & verts, and the ZR-1 prototypes
Team Owner
Joined: May 2001
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From: ...tearing up the highways, one state at a time™®©
Originally Posted by cplonner
Are the gear ratios on that site right? i have heard from many different people different information.
Yes, and more: http://www.corvetteactioncenter.com/...89/89prod.html
Team Owner
Joined: Jun 2001
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From: Orlando FL
St. Jude Donor '08-'09
Originally Posted by BADDUCK
My 1989 shows 245HP and 9.5:1 compression. It's a 6 speed w/3.54 gears.
I need to figure out how to remove it since none of it is correct anymore heh, or figure out how to etch "stock specs" into the plate LOL.