Suspension and Chassis Questions about your suspension? Need chassis advice?

Solid engine mount Q?

Old Feb 26, 2006 | 08:32 PM
  #1  
Raven90IROC's Avatar
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From: Katherine, Australia
Car: 1990 Camaro IROC-T
Engine: L98 Turbo (GT40)
Transmission: THO400
Axle/Gears: Forged axles, 3.23 rear
Solid engine mount Q?

Would a pair of solid engine mounts suited to a SBC (generic) be suitable for use on a thirdgen? Or are thirdgen mounts specificly different in some way?

Cheers!
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Old Feb 26, 2006 | 09:26 PM
  #2  
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
When I originally got rid of the factory clamshell rubber mounts and installed solid mounts, I used the ones designed for thid gens from Moroso.

The upper part #62510 is used on many different engines including big and small blocks in many different vehicles over different years.

Out of the 6 different lower mounts available, third gens need to use #62610 lower mounts

Using both these mounts keeps the engine in the stock location. Technically you could use whatever solid mounts you want. Mixing and matching parts will change where the engine sits.

I currently use a front motor plate and the engine has been set back about an inch and sits a few inches lower than stock.
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Old Mar 2, 2006 | 08:55 PM
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From: PA
Car: 92 camaro RS
Engine: LSA
Transmission: Magnum F
Axle/Gears: TNT 8.8 wavetrac 3.31
solid mounts are ment for race cars if you put in solid motor mounts in you should put in a solid trans mount to b/c the vibartion will work its way back and could do some damage on a stock rubber mount
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Old Mar 2, 2006 | 10:13 PM
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From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
Originally posted by obeymybird
solid mounts are ment for race cars if you put in solid motor mounts in you should put in a solid trans mount to b/c the vibartion will work its way back and could do some damage on a stock rubber mount
I thought I read somewhere else to leave a rubber tranny mount?
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Old Mar 3, 2006 | 05:49 AM
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ross's Avatar
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From: stuart fl
Car: 82 camaro
Engine: 434 ci
Transmission: t400
Axle/Gears: 9'' 4.10 gear
I have had the moroso mounts on my car for about ten years worked great car rides great I also used the rubber trany mount. And the resson I used the rubber mount was because my friend who owned a chassie shop said that the uni bodied cars flex alot and it would help keep me from braking the tranny case.
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Old Mar 3, 2006 | 04:01 PM
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From: Oshkosh wi
Car: 77 Firebird
Engine: 454
Transmission: th350
Axle/Gears: 4.10
I had solid motor mounts weld in frame connectors and solid body mounts on my 80z28 and it broke the trans case with the solid trans mount. I switched to a poly mount and never had that problem again.
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Old Mar 4, 2006 | 01:56 PM
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From: UofA(Tucson), AZ
Car: 92 Precision Red Firebird
Engine: v6->357 vortec xe262h rpm intake
Transmission: t5-> t56
Axle/Gears: 10bolt 3.42s
same here solid motor poly trans. if you do both solid you'll snap the trans somewhere
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Old Mar 4, 2006 | 08:12 PM
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From: Ohio
Car: 1991 RS
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 2.73
I don't understand. What's the advantage of harder mounts?
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Old Mar 4, 2006 | 09:38 PM
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Keeps the engine from moving around. If the engine moves, energy is being lost that can be put down the driveline. With my front motor plates, my engine becomes part of the chassis. When the engine wants to torque over, it can't and the power is transfered to the chassis. My chassis is set up so that it doesn't even twist when I launch. Both wheels come off the ground equally.

A twisting engine is also hard on other parts like exhaust etc. Even though rubber mounts are good for eliminating vibrations from the car, they allow the engine to move quite a bit. Poly mounts help a lot. Some people will even chain down the left front of the engine to keep it in place.
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Old May 1, 2006 | 07:21 AM
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Mark1963's Avatar
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From: Stock England
When you use solid engine mounts, are throttle linkages affected by vibration?
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