mike tkach

iTrader: (3)

i think the efi cam is the same as the carbed cam except for a wider lsa.

sutphen 30

nope,,efi cam is 230,236 carbed cam is I think 222,228

sutphen 30

just shows you how effiecent a carb is at making the numbers,,less cam.

MILD THUNDER

iTrader: (3)

HP500 Carb Camshaft. 222/230, .576/.598 110LSA

500EFI camshaft 230/236 .598/.610 114LSA

I wonder what was behind Merc's choice on the HP500 cam. They were known for reversion with the 110LSA. One of the only cams I've seen in a mercruiser/mercury racing engine with a 110LSA.

mike tkach

iTrader: (3)

i knew you would post up the info faster than my old azz could find it,lol.

demax990

Hmm lots to think about I found a set of 088 heads with 30 hours on them for 450. I am thinking about going with the 500efi cam. I know I will need to change out springs to match the roller cam. But will I see any real gains with the 500efi vs the 420 cam

mike tkach

iTrader: (3)

i would say that the tighter lsa had something to do with it.

mike tkach

iTrader: (3)

not sure how much power gain but flat tappit cam is old school.the hyd roller setup is the way to go.

sutphen 30

no way,icl of 106 and 8 degrees less.carb cam kinda sucked from the get go,,but swap it out for a 731 and the motors really responded and didn't revert at 850rpm.

demax990

Ok so who wants to sell me a 500efi cam with lifters and rockers for a very very good price as I am just a poor guy doing a low cost build