Do you even know how
AO Gold Member
Join Date: Sep 2007
Location: South Africa
County: Western Cape
Thanks alterro. Really valuable information. I have been told that on the 3.2 engines, the lobe centers are also different because the either exhaust cam timing, or both, have also been altered. can anyone perhaps confirm or deny this?
So far we have:
Cam Lift Duration Open Close Lobe Center
Inlet 9.3mm 215 1 BTDC 32 ABDC 109
Exhaust 9.3mm 215 37 BBDC 2 ATDC 109
3.2 V6 GTA
Inlet 9.3mm 223 1 ATDC 44 ABDC 113
Exhaust 9.3mm 215 36 BBDC 3 ATDC 110
3.2 V6 GTA2 (Popular grind in South Africa)
Inlet 9.3mm 231 9 BTDC??? 40 ABDC??? 109???
Exhaust 9.3mm 223 41 BBDC??? 6 ATDC??? 109???
The GTA2 grind adds another 8 degrees duration to the inlet cam and uses the GTA inlet cam profile on the exhaust. It pumps the power of a 3.2 engine to 196kW (263bhp), and if induction, exhaust and mapping is done, then this potentially climbs to 215kW (288bhp). I have seen a few cars with this kind of power, but they had carbon plenums and F430 throttle bodies as well.
My next question: Does one have to replace the plenum and throttle body to get this kind of power or will the stock units be sufficient? I would like my engine to look as stock as possible.
Last edited by Ian Lusso; 23-06-16 at 08:03.
Reason: Correcting GTA cam timing figures