Yet again more W2 360 talk
Roller cam for sure, IMO you're not getting to 600 hp easily with a flat tappet cam.
I had a 340/W2 combo a few years ago. It was OK, car usually ran 12.0 at around 3,200 lbs. This was stock stroke 340 with TRW "pop up" pistons and a solid flat tappet cam, the old Mopar Performance purple shaft .528" 241/241 @ .050". The W2's were older 810-castings with open chambers. They were "cleaned up" but I wouldn't say they were "ported" and just had 2.02 valves. Intake was a Victor W2, not ported and a 750 double pumper. This was a 7,000-7,200 rpm combo. There was not much torque off the line. it was fun on the street but a little lazy at the track with a 1.75 60 ft. It needed gears (4.30+) and a good converter.
At one point I tried switching to a ported Strip Dominator with an 850 TQ. It looked cool but it never ran right. Part of it was that the motor was tired and generally vacuum was under 10" which may have had something to do with it. I do think the intake may have been too much for the TQ. In my mind the TQ was never designed to run on a single plane with a large plenum. Plus it's only a single fuel inlet. Maybe it could have worked with more tuning but I tried for a while and gave up.
Here is the W2 Strip Dominator. Had the carb flange opened up, would have swallowed anything. It was a good intake. Probably should have kept it but I sold it with all my W2 stuff at Carlie a few years ago.
Plenum.
Roller cam for sure, IMO you're not getting to 600 hp easily with a flat tappet cam.
I had a 340/W2 combo a few years ago. It was OK, car usually ran 12.0 at around 3,200 lbs. This was stock stroke 340 with TRW "pop up" pistons and a solid flat tappet cam, the old Mopar Performance purple shaft .528" 241/241 @ .050". The W2's were older 810-castings with open chambers. They were "cleaned up" but I wouldn't say they were "ported" and just had 2.02 valves. Intake was a Victor W2, not ported and a 750 double pumper. This was a 7,000-7,200 rpm combo. There was not much torque off the line. it was fun on the street but a little lazy at the track with a 1.75 60 ft. It needed gears (4.30+) and a good converter.
At one point I tried switching to a ported Strip Dominator with an 850 TQ. It looked cool but it never ran right. Part of it was that the motor was tired and generally vacuum was under 10" which may have had something to do with it. I do think the intake may have been too much for the TQ. In my mind the TQ was never designed to run on a single plane with a large plenum. Plus it's only a single fuel inlet. Maybe it could have worked with more tuning but I tried for a while and gave up.
Here is the W2 Strip Dominator. Had the carb flange opened up, would have swallowed anything. It was a good intake. Probably should have kept it but I sold it with all my W2 stuff at Carlie a few years ago.
Plenum.