When a manifold has a power rating of, for instance, idle to 6500, what engine size is this based on? The amount of air a 350 pulls in at 6500 would see a 283 up to 8000rpm. My lil 283 sees peak power at 6800 (according to dd2000) and I really don't know what manifold would have the right range. I'm not looking for torque (I have a big block '73 camaro for that sort of thing, I want this engine to have totally different character) but I want a manifold that has the appropriate power range.

Any advice appriciated.

 

You really have to spec out the rest of the combo...along with what type of trans and gears...

 

Take all manufactures power range ratings with a grain of salt. They may say 3000-6000 or idle-7200 (I think is the weind excellerator). The problem is, they dont give any numbers. It could lose 20% under 3000 but still qualify to be rated that way, by thier standards. Try to match the intake to the engine, but realize that the manufacturers ratings are merely a generalization, or a guideline.

 

I think its typically based on a 350.

 

Which is in fact another reason why the power ratings are off.