Jetting ported 701

Kyles73dart

Kyles73dart

Location
Dawsonville, GA
Looked through the jetting database thread and didn't find anything close to to what I was looking for. It is a 701 with cases and 61x cylinders ported, b-pipe, dual 46's. Right now the carbs are set up with 120 pilots and 150 mains, 2.0 N/S, 65g spring. I just took it out and it seemed lean. What jetting would you guys start out with on this engine set up?
 
Roseand

Roseand

The Weaponizer
Site Supporter
Location
Wisconsin
That is like single 44ish jetting on a ported 701. You are either ridiculously rich or have some strange air leak causing you to be that lean. Definitely don't order any larger main jets!

Sent from my SM-G920V using Tapatalk
 
Quinc

Quinc

Buy a Superjet
Location
California
My bad,I read that as a single 46. Like Roseand said, you are way too rich. Try 120 Pilot and 130Main with 28-32psi.
 
Kyles73dart

Kyles73dart

Location
Dawsonville, GA
You guys are right. I went and popped the cylinder head off and looked at piston wash and the plugs. I think it's way rich. This is after about half a tank of fuel run through while I was messing with the carbs.

20160627_184648.jpg 20160627_185036.jpg
 
Last edited:
yamanube

yamanube

This Is The Way
Staff member
Location
Mandalor
I was running 120p/110m, B pipe, dual 46s with 81mm ProTec cylinder (very similar to a 62t cylinder with heavy porting).
 
V

Vortex

Location
Southeast
I've been tuning dual 48s on a ported 727, the best I've had so far is 127 pilot, 140 main, 2.3 needle 115 spring.

About 1.5 turns on the low
3/4 turn high

That's on the rich side but it doesn't bog too bad
 
You must log in or register to reply here.
Top Bottom