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Originally Posted by 2023_ZL1-AUTO
Something has to be out of tolerance? I have a similar issue (still do), where the adapter plate on my Soler throttle body to the supercharger snout makes the throttle body protrude out just enough that it rubs the black plastic cover on the throttle body electronics. I had a friend make me a piece of stainless that fits around that area. It's kind of like a "L" shape and the throttle body bolt holds it in place. Now the belt rubbing is over a smooth stainless steal surface vs cutting into the plastic of the throttle body and fraying the inside of the belts edge. This reminds me, Soler owes me a different adapter plate! I need to remind them of this! Good luck!
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I had a similar issue with Soler’s adaptor plate, I ended up having the LT5’s throttle body’s holes elongated to be able to bolt onto the LT4 s/charger without the adaptor plate therefor not being indexed off center and causing my rubbing issue. As my s/charger is not ported I had a heat rejecting glass filled nylon plate made that has the outer profile of the LT5 throttle body (black part in pic mounted between the T/B and blower) and the internal is machined with a tapper from 95mm (LT5 T/B size) to 87mm (stock LT4 s/chargers mouth opening size) to allow the butterfly to open without fouling on the LT4’s non ported 87mm opening. The plate is only 5mm (approx 0.200") thick. As the T/B is now no longer indexed off center due to the supplied Soler adaptor plate there are no issues with belt rubbing. Another bonus is that the T/B is very noticeably cooler to touch vs the blower as the heat from the blower isn’t transferred into the T/B as it would be with direct alloy on alloy contact.