Weenie pipe I.d.

cgray

Member
We run at a track that has a 5/8 header rule. Most of the guys run the small 5/8 open headers. I was talking to a well known reputable engine builder who said if I could run one of the small pipes with a muffler that would make more power. I remember seeing somewhere the weenie pipes were around the same I.d. Are all the muffled weenie pipes around.625
 

1fasttiller

Member
Is there a MIN-MAX spec in the current AKRA rule boon for the weenie pipe diameter? I don't have mine in front of me to look.
 

cgray

Member
The rule for the predator (claimer class) is for a 5/8 (.625) I.d. Pipe. Most guys rune a pipe like the robertsons torque tube 5/8 open header. I was talking to an engine builder who mentioned if we could run a small muffled pipe the engine would run better that’s why I was asking. I called ARC the other day asking them about the rlv weenie combo and they confirmed it was right at .625 5/8. I was just trying to find out before I ordered one and it not be legal.
 
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