i mean we are already forcing air into the motor would forcing air into a better flowing head do any difference. it gets forced no matter what. what are your opinoins on this subject

 

They help, but the cost/performance depends on your power goals.

 

Less restriction with ported heads.

 

Anything that improves airflow is helpful. The biggest gains come from the shape of the runners not the size. Velocity is what matters most.

 

i say no on a daily driver...not worth the money vs hp gain.

 

On a street car they would be in the Top 10 mods. On a race car like my bbc (see link below), heads cost as much as the rest of the motor and can add a couple hundred hp.

 

it is very important in a race type car. on a street strip, not really. but it depends on your budget. bang for the buck on under 500 rwhp setups, na, not the best. but if you are looking for 700+ rwhp, then they are very important. more resistence = hotter air = need more octane, less timing, etc etc.

boost is a measure of resistence. i will take less resistence and less boost but more power any day of the week.

 

i see what you guys are saying. so for my setup as of right now heads should be less of important than say a 12 bolt or something of that nature. but if i was to want to make 700rwhp i should opt for a good set of heads. thanks for the help

 

From one that knows from personal experience, heads on a blown application are everything. Port size, Valve size, cam timing events in relation to the heads, and squish area and chamber design. The heads on my car are directly responsible for the power that my car makes.

It is the most important part of the design of the engine on a blown application, because too big of a port or not enough valve can cost you power. If you can achieve more flow from a smaller port than with a head with a bigger port, you will always make more power.

 

what kind of heads are you running and what would you suggest? any ideas are greatly appreciated

 

Rob had stock heads and cam in that car when he was making 800+ rwhp.