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Corvette and other GM motor mounts.

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Old Jun 17, 2001 | 09:06 PM
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grobb284's Avatar
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From: New Carlisle, Ohio
Engine: LS1
Transmission: T56 Tremec
Axle/Gears: Viper Dana 44, 3.54 gears
Corvette and other GM motor mounts.

While browsing the Summit catalog, I saw a listing for Camaro motor mounts, left and right side. In my 1987 Corvette chassis, the mounts appear the same, though I have not measured them.

The reason for my question, I wish to move the motor rearward in my car, 1/2 inch. Rather than modify the frame, are there any factory mounts that will move the motor rearward? Are these compatible with the Corvette supports that capture the mounts, a horizontal bolt.

Failing that, are there any that will move the motor vertically 1/4 inch.

The driveshaft,the rear transmission mount are not a problem. Nor is the firewall. Just the motor mounts.

Realize you guys may have more experience with motor mounts, please be patient with me.


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Old Jun 17, 2001 | 09:38 PM
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Im not aware of any rubber mounts that locate the engine differently... but there are solid mounts out there that Im sure you could find that would locate the engine in a different spot. That would introduce alot of vibration of course.

Why do you wanna change it?
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Old Jun 17, 2001 | 09:46 PM
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From: New Carlisle, Ohio
Engine: LS1
Transmission: T56 Tremec
Axle/Gears: Viper Dana 44, 3.54 gears
Installing some Nascar headers, 18 degree, that fit overall better than the aftermarket Corvette headers, + they are equal length, 1-3/4" stepped to 2", and stainless.

After making adapters for the 23 degree aluminum heads, the right header, #2 cylinder, is 1/8 inch away form the rt. front a-arm pivot. Would feel more comfortable with a litle more room.

1/4 inch up, or 3/4 inch back should do it. I say should, for nothing in a modification works smoothly.
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Old Jun 18, 2001 | 01:38 AM
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From: Klamath Falls, Oregon
In my travels around the web I seem to remember that I read, somewhere, that camaro/bird mounts sit the engine lower in the chassis. Hence the different part #'s. Maybe the corvette is the same way and a caprice mount will do what you need.
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