ESR TRX 5B Tuning?

[jafa0]

I have a ESR 344 built by Pete (Hybrid Engineering) Mx / Duneish porting, PVL Digital ign, 39 PWK carb, ESR intake, Vforce 3 reeds. I have a TRX5B standard mount and a TRX11 CM. I have had a difficult time getting any bottom end throttle response out of the 5B pipe. I have tried a bunch of different jetting combos 52-58 pilots 175-195 mains and DEG, DEJ DGH DJG CEJ CEL needles and then some. Mid and top end are great. my TRX11 CM has better bottom end though. Mainly curious as to if anyone else has had trouble tuning the 5B pipe.

[huntertools]

Had almost the same problem with mine when I first got it. Very strong on the top of the pipe but flat on bottom end. Tried every range on the jetting with no luck. Had two issues, one the flywheel was bad. Replaced and ran much better. Two the CDI was a aftermarket Ricks stator, replaced with OEM and bottom end power came in. I also run the 5B pipe.

[kb250r]

What's the timing set at? Mabe call Pete and give it some timing, 2-4 degrees of timing usually Wakes up my bottem end ever time.. But be CAREFUL that pvl will smoke a piston QUICK in the wrong hands ....I've always had a lot better luck with the 38 A/S or 41.5 for 370+...I've never had luck with the 39 pwk..cej and dgh middle to last clip has worked for all my builds...just trying to help  good luck

[jafa0]

Appreciate the feedback. I am running .027 on the timing right now, up from .023 ( I have a friend that broke a piston at .038, he runs his 344 at .020 timing.). Pete and I have talked about it in the past, even dropped the timing slightly going from a 1/4" spacer to 3/16". I ran the TRX11 on this motor for a while and it picks up the pipe super easy on a DEJ 3rd clip 52 pilot 175 main, and tries to rip my arms off. If it wasn't so stupid loud I'd probably just keep running it. Its about 94db at idle 106db if you check it at 3500 like the cops at the Oregon dunes do.