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[deputydawg]

Currently building a 95" Twin Cam using Andrews 37G cams and reworked, ported heads with larger valves in a 2001 Heritage Classic. CR is about 9.7:1. Also installing a SE programmable ignition module. The bike currently has a Thunderheader, no plans to change it.

I am contemplating upgrading the carb from a stock 40mm CV to a 44mm CV. I do a lot of altitude changes in the summer, so I wanted to stay with the CV for that reason. My riding style is mostly ratting around, holding the throttle wide open until I realize I am being a Dumb ass(again), doing the daily burnout, but rarely running the R's over 5.5K All that may change with the new set-up, I do from time to time need as HP as I can wring out, he he. 

Will the larger size carb be worth the expense and possible complications or should I stay with the stock(as one local mechanic has suggested) carb. Thanks for the help. Mark

Also, if I decide to do the carb change later, how hard is it to do once the bike is built. The manifold will have to be changed according to the HD website. I have done this job on my Shovelhead 30 years ago(seems to me it had the hiccups everafter, even when I put on new clamp rings to stop that pesky air leak!). I am a fairly competent wrench, but by no means a pro. Thanks again. Mark

[rednectum]

on a 37 build, i would stay with stock carb. going larger with a carb and not having enough velocity at the port will kill low end. your stock carb will carry another 10 hp/tq over what the 37 build will do.

i would however take the money i saved on carb and buy an ignition controller so your dyno guy can get ignition curves dialed in.

[deputydawg]

Thank you Mr Rednectum. My dyno guys do 100's of bikes every year. Does it seem likely that they already have this controller? Or is it a part that stays bolted on the bike? I already have the SE Pro Adj. map ignition system. Thanks, Mark.

[rednectum]

Thank you Mr Rednectum. My dyno guys do 100's of bikes every year. Does it seem likely that they already have this controller? Or is it a part that stays bolted on the bike? I already have the SE Pro Adj. map ignition system. Thanks, Mark.

your adjustable map ignition is what i was talkin about. i didnt even know SE offered an adjustable one! should be good to go!

[deputydawg]

Fine Dawg deal, thank you very much Mr. Rednectum. Mark