What's the difference ?

fordracer · #1 (**permalink**) 04-13-2002, 08:22 AM

I was flipping through my SVO catalog and I have a question about Cobra Jet heads. What's the difference between the B429 head which is complete and found on the 535 hp crate motor and the C429 heads which are found on the 514 cu in crate motor ?

427sharpe · #2 (**permalink**) 04-13-2002, 11:36 AM

The B429 head has a revised port profile with less cross section--its a monster sized port! SVO received a lot of feedback from racers wanting better response so they revised the port and cross section to improve lo rpm flo and hence the C429 head. This is also why they run the bigger head on the larger displacement motor...