Need a baseline jetting for my front mount RX-1

[rxrider]

That's what I'm saying, at the same boost pressure my current setup would produce the same fuel pressure as before. Changing out the IC and turbo may affect the float bowl pressure, how much, that I'm not sure of

Thanks Ted

 

[Blue shadow]

keep the 132.5 in and start on 10 psi and work your way up on boost until your jetting starts to lean out and then jet up.

 

[kinger]

I'm out of my league I cant figure out where the extra fuel is coming from then and I have no idea how the pressure is different in the float bowls vs the intake.

Dont respond to me I'll keep learning, I dont mean to hijak yoru thread.

Although for saftey would you not want to stat higher and work your way down?

 

[lakercr]

With the MCXpress turbo kit running stock carb setup with 135 mains jetting were spot on at WOT in my friends sled the other day.

I still run the Malpassi fuel pressure regulator so float bowl fuel pressure should remain about the same. What I don't know is how much the PL IC and GT2860RS will affect the jetting, my guess will be that it's going to be leaner comparing to the same boost pressure on the MCX (I ran 16 lbs of boost on my MCX at 11.0-11.6 AFRs WOT, main jets at 132.5)

Current carb setup:
Mains 132.5
Pilots 17.5
Needles 3
Pilot screws 2
Hurricane turbo springs
Billet T's
Billet Carb Caps
RX-1 Mountain upgraded float bowls

Guess I have no other choise than to run it with the 132.5 and watch the AFRs and Boost carefully and take it from there.

Thank you guys for the input.

I'd swap out the 132.5 for 135, maybe 137.5's. Everything else looks good.

 

[rxrider]

Thanks Blue Shadow and lakercr

kinger - my sled has a fuel pressure regulator, it's 1:1 type. At idle fuel pressure is about 4-5 lbs, when boost comes on the fuel pressure will rise 1:1 thus producing a fuel pressure of 14-15 lbs at 10 lbs of boost. The fuel pressure, and the air pressure going into the float bowl, determines the amout of fuel going thru the jetting circuities of the carbs.

Hijacking my thread??? no way buddy, you're not highjacking anything Keep the questions coming, we may all learn something.