Adding this- I wonder if valve cover pressure is pushing fuel past the needle/seat? Or pressurizing the float bowl?
The T-line ran from line out of the fuel pump to the carb back to the gas tank helps reduce unnecessary fuel flooding into the 24mm flatslide float bowl, and directs extra gas back into the gas tank. The flow back into the tank is pretty good, and also helps with venting.
Honestly at first it was dumping fuel pretty bad, but after some riding it seemed to get better-ish? The ride is 10x better with this fuel pump than without it, however it is causing a rich spot mid range which may need to raise the needle position 1 clip. Also need to play around with the a/f screw.
I have the sidecover pulse fitting into the catch can *crankcase pressure*, and the valve cover pulse fitting *valve pressure* feeding the pulse on the fuel pump.
Do you think putting the sidecover pulse fitting into the fuel pump pulse fitting (less pressure), and diverting the pulse fitting from the valve cover *excessive pressure*? to the catch can would help alleviate this issue?
One thing I do not have is an intake manifold pulse fitting so it would either be from the side cover or the valve cover fittings ideally... Think its a better idea to tap into the intake manifold, and have an NPT fitting off there?
Also these are my last runs. Jets. Max speed. Gear ratios. Hopefully it’ll help someone in the future.
24mm pwk mod 275 camshaft
.2” over rod
All billet rod, flywheel, m
Flattop piston 14.5-15” tires
1.3 billet roller rockers
1st test run 130 main/42 pilot/gold needle in 2rd position 5.0 gear ratio 12/60
Hit 60.8mph
2nd test run 135 main/35 pilot jet/regular needle in 2nd position 4.53 gear ratio
Hit 57.5mph
3rd test run 135 main/40 pilot/regular needle in 3rd position 4.53 gear ratio
Hit 59.2mph
4th test run 120 main/38 pilot/gold needle in 3rd position 4.54 ratio *added fuel pump*
Hit 59.4mph
5th test run 120 main/38 pilot/gold needle in 3rd position 4.916 ratio 12/59 *added fuel pump, but issues with richness on low end *aka flooding out carb* top end keeps chugging* and it was rainy/wet
hit 58.5mph she felt pretty good... need to figure out overflowing out of carb.... that definitely is messing up with the jetting...float level... everything....
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