Main jet thread

[Freak]

Please state your boost, Altitude and your main jet THNX!

20lbs - 8-10k' - 135m (too lean)

 

[Skydog]

12lbs 500-800 feet Stock main that is 135 i think?

 

[snowy1]

18lbs-10,000 ft.- 136.3 mains needs alittle more.cpr kit with bigger turbo added.

 

[monker]

how about state the kit you are running too...

8lbs...0-2000ft...132.5 (probable 130 soon)...MPI supercharger

 

[rerod]

Michigan 1000ft, 9-16psi 140 jets.

 

[Skydog]

Bender

 

[Colorado Yamaha]

MPI Stage I @ 10lbs, 11-13k feet 127.5 mains. AND, still tuning for this thin damn air!

 

[rx-hi]

MC-X rear 3-6000 130 main

 

[KbxSrx]

MPI 5-10 lbs 2500-9000 feet 130

 

[hooper]

MCX-rear, 10-18 lbs, sealevel , 135 mains.

 

[rxrider]

MCX REAR, 11-18 lbs, 0-3000 ft, 140 mains
Lets add carb springs too. I run Holtzman green carb springs with needles in 3rd position. Pilots 17.5, screws 2 turns out.

 

[Blue shadow]

cpr front mount at 13 psi with 130 mains so far sealevel

 

[Otis RX]

Bender... 1,400 ft...... 13psi.......135 main.......stock springs.......will start messing with Holtzman spring inventory.

 

[sledheadgeorge]

8 to 16 lb boost, stock mains, went down one size in the pilots, stock carb springs, 800-1800'

 

[BlgsRX-1mtn]

MPI Stage 1 SC kit 10 lbs? boost(high boost pulley configuration) at 7000-10,000+ elevations 127.5 mains, 25 pilots screw at 2 3/4 turns out needles stock. Slightly lean at idle (13s on the O2) lean side of range in the mid (mid- high 12's on the O2) and running right on at WFO (11s to low 12s on the O2).

Jim