Paul Richard
Member
I'm want to ream my stock 48mm TPI throttle body for 54mm throttle blades. Blades are 2.125 from Bo Laws Performance here in Orlando. I'll go ahead and machine the shaft bore for bushings while I have the shaft out, but the bushings are not what I'm posting about. I've fabricated a fixture for the H16 adjustable reamer. That part is not going to be a problem either I do envision a couple of issues however, and wonder if anybody has found a solution. Number one is retaining the coiled return spring. I could build a retaining clamp to keep it coiled, but surely someone has already solved that problem. I see the two "nubs" (which appear to line up) on each plastic spring retainer, and wonder if these nubs are there for clamping/alignment during removal and reinstallation. Second is which end of the throttle shaft to grind off: the throttle bracket end, or the throttle position sensor end. Either way that end of the shaft will have to be machined for a retaining screw for re-assembly, as the peened end will be gone. I appreciate any experience anybody would like to share. Thanks. Paul