Mac .21 pipe length?

[Keebibear]

Im moving my Mac from a Seaducer to my Hawk and have bought a new header and Andy Brown pipe.Im assuming the pipe fits over the header and what do I set the length to start at? Any recomended coupler to work on this setup?I think I had to run a white Aerotrend before.Thanks

 

[shoboat]

Keebibear,

Try 7 3/4" to 8" to start you can go into 7 1/2" if your propeller will let you.

Any good small coupler will work good, the blue Aerotrend works great for

me.

Good Luck,

Mark Sholund

 

[Scott Schneider]

With my 3 mac 21's have found I can't go that short. Typically @ 8" to 8 1/8" with 45% to 60% fuel.

And YES the Aerotrend "Superblue" or "Cream" coupler materal is best.

Scott