V6 CF1/CF2/CF3 power differences
I'm actually trying to understand some things about our v6's. I previously got a CF1 GTV with a CF3 engine that was very very strong with a wide torque spread at all rpm. All the car was stock, from intake to map & exhaust. The benefit of being on a CF1 car is that the throttle body diameter was 80 mm. The previous owner, who did the engine swap, told me that the CF1 engine was not as strong (timing was OK).
Now i've got a CF2 engine with mods (squadra remap, 3.2 cams, 74,5 mm TB, ACT plenum, ELFP and decat) and it don't feel as torquey, except on the very end of the rev band (6k to 7.3k rpm). Is there any upgrade done to the CF3 engine to counterbalance new emissions regulations and the precat that would explain the big power gap when fitted in a CF1 engine and ECU ? I see that the pistons and head gaskets differs (or is it only the TS ?). Maybe the CF3 engine got more compression ? I know that only the cf2 cars got a DMF but does it make this much difference ?
Last edited by Betepaille; 15-04-19 at 19:31.