RE: Macs pipes : Which one to buy ?
It Started out Taching 11,500 I cut 1/2 inch off it went to 11,800 I cut 1/8 inch off it went to 11,900 I cut 1/8th more it went to 12,000 I cut 1/8 more it went to 12,600. I flew it for another 1/2 gallon! This engine is still fairly new! Sunday it tached 12,650! So it's still breaking in! I think I'm done cutting the header long or not! Unless some one can convice me that I should! Super Tiger said this motor creates it's best power at 11,000! Go Figure! I'm running an 11X9 APC!