Finally decided on a cam for teen SB. Should I bother with header?
Ran your engine on Camquest and it said 308hp@5000, 364tq@3000.
Yeah, I think I am optimistic with my 320 hp estimate. I ran similar with camquest as well.
Like I stated, I am so pathetic with my low end feel now, I crave torque and that is all I really care about and I think I am realistic with 350, maybe even low.
I think my gains might be slightly aided with my mild 308 cast head work with a good 3 angle job, bowl & mild porting and gasket matching. I did similar with my exhaust manifold and intake manifold as well. Lots of hours with the grinder anyway. It sure looked good going in and a general rule of flow work is that, "if it looks good, it probably flows good"....LOL. I actually believe that. I recall bumping my CFM numbers a bit in camquest & that really moved the needle in hp, hence my optimism anyway.
So to update, I am hearing that headers are simply not worth the hp / $$ I would spend. I am glad too. Love my manifolds, painted with POR cast iron grey and they look factory cast. Love the sleeper look as well.
And, I am expecting that with far greater air flow through my new 4 barrel intake system, much better 360 heads worked over, far more lift in the cam along with more duration, loss of the stove pipe pathetically choked off exhaust manifolds and single exhaust now replaced with better flowing larger manifolds running back to dual X-pipe system running through Thrush Welded mufflers......that gains should be quite substantial and more importantly, when I want them.....right from idle. No more power levels that are far North of my operating range.