Each bore is 55mm, I put on one from a gt-500 they are 62mm each. Thats was a nice mod.
GT Tb's have 55MM Bores like you said. GT500 TB's have 60MM bores. BBK upgrade for the GT has 62MM bores. BBK upgrade for the GT500 has 65MM bores.
FRPP does not make an adapter kit. They will sell you the GT500 TB and you can buy an adapter from somewhere else.
Not really sure Klaw, other than to say the monoblades should outperform the twin bores by a wide margin (I'd guess ~30-50%). Though a 62mm twin bore should be fairly close, the monoblade should still be better (has 15% more surface area).
Dan
That was my thinking too. Can't say I'm really happy with Whipple though. They don't have any monoblades in polished and apparently aren't ordering more (nice that I paid extra for a polished blower). I ordered/paid for a black monoblade a couple weeks ago and it still hasn't shipped - they're waiting for their order which was supposed to be there two days after my order. Now my build is probably going to stall and I have dyno time booked etc.
The Ford Racing twin 62mm in polished looks like a very nice piece. I probably should have just ordered that.
I didn't realize that upgrading the throttle bodies on these cars was actually a performance gain. I thought that I read early on that there wasn't much to be had there. How much difference does it make?
Well FRPP also has a twin 63.5mm bore TB kit that comes on the new Cobra Jet race car and one just came in 1st place in it's class with a qualifying time of 10.08 1/4 mile time so I would say a twin 63.5mm would be plenty for street use.
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