Has anyone heard both pipes? Is the Fatcat louder? I had a ProPipe on my last bike and couldn't hear the speakers at highway speeds plus the pitch was just plain annoying, at least to my ears.
1. The fatcat WILL be louder.dennish said:I am running 24 discs with a closed end cap on a GMR 107". they dyno'd it down to 13 discs with 24 producing the best t-curve.
The reason I asked the difference in noise between the fatcat and st 2:1 is I am told I could improve my numbers by switching out to a fatcat but won't do it if the noise level increases.
I had GMR do a 107", w/R&R cast heads, 615/585 gear drive cams & camplate, S&S roller rockers, Rivera Primo clutch, HPI 51mm tb & ST 2:1 Supermeg. Mike Stegman at Latus dyno'd it, 117hp/117tq. He said he could have tweaked it to get a few more ponies on paper but liked this tq curve the best. He said he was impressed with how the tq curve comes up to 100lbs at 2700 rpm and stays over 100 until 6300 rpm. The bike runs great.PR3VS56 said:1. The fatcat WILL be louder.
2. Tell us more about your build/numbers.