[Formulajones]

Originally Posted by Verdoro 68

My recent chassis dyno results really has me rethinking my decision to stick with R/A manifolds. What are the cam specs and head flow combos that tend to benefit more headers vs. losing very little with manifolds?

There are quite a few variables. The entire build thread on the engine I spoke of is still here somewhere. I've put links to it in the past when this subject comes up. I think that engine made 520's for HP and near 600 ft lbs. It had iron d ports ported by Dave. I think around 260 CFM, and the hydraulic roller is the same one I've used, Paul's custom grind
239/243 on a 112 lsa.
The neat part is Paul posted the entire dyno graph back to back with headers and RA manifolds and they follow each other withing 3-4 HP and actually better torque with manifolds.
Owner of the car used to post here, can't remember his name.