11-15-2002, 08:54 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Drive Pin fitament
I used the Trigo (blank) adapters and machined them and the axles to accept the OEM pattern of 6 pins on 4 1/4" diameter with countersunk holes secured with regular 1/2" diameter wheel studs. Then the 3/4" barrel nuts (actual drive pins) are torqued to apply the clamping load. The PSE FIA wheels have 6 holes (49/64ths") that allow about .015 clearance with the barrel nut diameters. This is quite adequite given the pin diameters and the bolt circle diameter. I machined the same 49/64th" diameter holes on a 6x4 1/4" pattern in a piece of 6" diameter round stock to mimic the backside of the wheel. And then put it over the barrel nuts and then torqued the barrel nuts. This contained or limited the expansion (if any) of the barrel nuts and kept them alligned during the tightening process. To date I have not had any problems. The PSE FIA wheels will not permit a 5 lug pattern due to the diameter and design of the mounting pad on the back of the wheel.
Rick
Last edited by Rick Parker; 11-15-2002 at 09:12 PM..
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