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

Solid mounts and/or anti-torque strap

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Old Nov 16, 2025 | 03:53 PM
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Default Solid mounts and/or anti-torque strap

OK so my engine is moving so much that the one of the pulleys for my supercharger was ground down by a suspension bolt.
I need either solid engine mounts or at least an anti torque strap.
Anyone have leads on either?



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Old Nov 16, 2025 | 09:33 PM
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That same bolt contacted my pulley as well with my old d1-sc procharger. That was wtih solid motor mounts.
(To answer your question: there was a guy here ‘churchkey’ who made the solid mounts I am using).

I had to grind the head of the bolt down.

this is a probably a separate issue that you dont have, but I determined the s/c bracket was bending under boost and I had to recut my bracket with another leg to it with a support peg (between both brackets) in the direction it was bending (photo 2). That was causing the belt to become unseated

Have had no problems since i went to f1a-94 and upped to boost to 20+ psi. (383 splayed main, forged)




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Old Nov 16, 2025 | 10:52 PM
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I also found I was having problems with SC clearance from sagging motor mounts- I changed to poly motor mounts and took care of the problems.
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Old Nov 17, 2025 | 07:09 AM
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Was going to send a PM but your inbox is full. I have a set of Prothane aluminum/poly mounts that I am going to sell.

used them a few years, overkill for my mild build. I found a set of solid rubber mounts and swapped them in (I didn’t want cheap hydraulic mounts).

if interested let me know and I can pics/price.
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Old Nov 17, 2025 | 07:11 AM
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Originally Posted by BrianCunningham
OK so my engine is moving so much that the one of the pulleys for my supercharger was ground down by a suspension bolt.
I need either solid engine mounts or at least an anti torque strap.
Anyone have leads on either?


Maybe After Dark Speed :

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Old Nov 19, 2025 | 07:52 PM
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Originally Posted by dizwiz24
...

this is a probably a separate issue that you dont have, but I determined the s/c bracket was bending under boost and I had to recut my bracket with another leg to it with a support peg (between both brackets) in the direction it was bending (photo 2). That was causing the belt to become unseated

Have had no problems since i went to f1a-94 and upped to boost to 20+ psi. (383 splayed main, forged)


tempted to stick a camera under there

Had it to the dragstrip
sounded like I lost the driveshaft for a second

drove it back, so it wasn't that
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Old Nov 23, 2025 | 12:46 PM
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BTW I actually installed a smaller pulley to gain clearance losing belt wrap in the process.

That just made it move even more, the shifter hits the body work
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