Whats the largest you can machine stock TB to?
#4
Re: Whats the largest you can machine stock TB to?
I had a 52 one, and that had touches of holes in the backside of it. I have seen some places on ebay go to 53, and 53.5, but i would assume you would need a perfectly centered TB to start with, and some very precise machining. Either that, or go back over it with epoxy and fill in the holes.
#5
Re: Whats the largest you can machine stock TB to?
I've bored alot of LT1 throttle bodies and the largest you can go safely is 52mm. Yes you can get 53 or 53.5 but you have a very good chance of breaking through a casting wall. I did one for a friend of mine that had a TPI and wanted me to see how big I could go. Almost to 54mm and I broke though a wall. Also any larger than 52mm and you will have to port the bores in the LT1 intake.
Even on some stock castings that are bored to 52mm will have the screw holes exposed, which will not hurt anything. The screws will seal the holes.
Even on some stock castings that are bored to 52mm will have the screw holes exposed, which will not hurt anything. The screws will seal the holes.
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01-14-2015 04:00 AM