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Jeff Chambers · 02-06-2002, 07:59 AM

Measure the TB right at the throttle blade location (tough to do without disassembling it). I'd bet that it measures 58mm at that point. The FRPP 65mm will have a noticable step at the throttle blade where it measures 65mm then steps on both sides to slightly more than 65mm. Probably to account for casting and machining tolerances. In class competition, they measure it at the TB with a 'go - no go' gauge.

02-06-2002, 07:59 AM	#6
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Measure the TB right at the throttle blade location (tough to do without disassembling it). I'd bet that it measures 58mm at that point. The FRPP 65mm will have a noticable step at the throttle blade where it measures 65mm then steps on both sides to slightly more than 65mm. Probably to account for casting and machining tolerances. In class competition, they measure it at the TB with a 'go - no go' gauge. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"