Box Stock

Best header?

br2715

br2715

Member
Trying to find the best header. Power range in the cam I have is 7-9000rpm. No muffler required. Any input will be greatly appreciated!
 
Was looking at this one. Does anyone know anything about this one?
 

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All depends on the primary size... if you running that much camshaft I’d say you would want the first stage in the .930 up to say 1.000 in size range.
 
OVALTECH1 said:
All depends on the primary size... if you running that much camshaft I’d say you would want the first stage in the .930 up to say 1.000 in size range.
Click to expand...

This is the stages in that particular pipe. Does that look good?
 

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I feel the first stage is kinda small for your application... which I believe is an open or similar??
 
Look into something like a RAPP HJT4 .... get a .930 or bigger primary with a single step a second step wouldn’t hurt but don’t choke it on the primary end.
 
The best header is the header which makes the most power on a particular motor. You wont know which is best unless you try them all and see which makes the best for that motor. Just because header 1 works great on a motor dont mean it will be the best header for another motor, and vice versa.
Try a few different headers and see what works best for you.
 
This chart can help with length if you have the capability of making your own. If you want to make a staged pipe Use a program like pipemax. For single stage pipes this chart closely matches the 3rd order length of pipemax.
 

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I know an old guy that once went out of state to race and lapped them. He had put a square tube header on{home made} before he left only because thats all he could find. When he returned to that track months later every kart there had a square tube header. He won again with a round tube header. He sold a bunch of engines with that trip.
 
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