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03-03-2016, 10:40 AM
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#1 |
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Registered User
 Join Date: Sep 2005
Location: So. Cal
Posts: 321
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Poly mount?
Should I run poly inserts on my clam shell mounts? I searched and some guys don't like them. Some guys say the other rubber replacement fall apart so poly is the only ones that hold up
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03-06-2016, 07:46 PM
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#2 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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Re: Poly mount?
Yes, I would go poly...(Did that)/ they will have a little more vibe @ idle speed, vs the rubber parts, but they do hold up
 Longhorn
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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03-07-2016, 02:19 AM
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#3 |
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meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: Poly mount?
My rubber sbc mounts didn't like 400+hp and any age at all. I ran them for a couple years but the engine had far more movement than I would have been comfortable out on the track. I swapped out for poly mounts and like the change.
The poly mounts don't vibrate all that much more than the rubbers. If your making good power, then rubber mounts will wear and vibrate a good amount, so the poly change might not be that noticeable at all. My 4l80e stock mount has held well tho, at least so far, ~5 years.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING  |
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