headers vs manifolds on a 318 2bbl difference ????

rumblefish360 said
Seems like you just about said exactly that you can’t. Read below.

I couldn't figure out how to PM ya

273 said
Plus dyno pulls only works well over a fairly narrow rpms so they favor top end.

What I meant is from what I understand a dyno is most accurate over a pull of 3000 to 4000 rpms or so and is easiest to set up for. So generally our engines work from idle to peak+ hp rpm somewhere into 4500-6500+ rpms so they tend to dyno the top 3000-4000 or so rpms or "favour the top end".

If thats wrong fair enough.