760 sn superjet

[750bpx2]

I have a square nose superjet that i pulled the 650 out of. I got my hands on a 760 out of a gp 760. I have a lighter fly wheel in it and 650 stater. 650 coffman exhaust manifold to a coffman pipe. the manifold is bored out to match the exhaust ports on the cylinders. i have 10/1000" head gasket on and ported it as well ass decked the crank case. have stock 760 crank and Pistons in it. it has dual 38mm carbs. what jetting should i run in them????

 

[bach6177]

If it's from a gp760 and the carbs came with it you should have 44's


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[Quinc]

dual 38's I would start around 70 P 135M and 43ish pop off.

 

[750bpx2]

I meant 44s sorry. I was thinking about another project when I said that

 

[750bpx2]

If it's from a gp760 and the carbs came with it you should have 44's


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I meant 44s I was thinking of another project when I said that

 

[bach6177]

Here is what I am running in mine with a b pipe. It starts you out a little rich but very close.

Main-140
Pilot-120
N/S 1.5 (stock)
Pop off spring-95g
Low screw- 1 turn
High screw- 1.25 turns




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[OA5599]

Here is what I am running in mine with a b pipe. It starts you out a little rich but very close.

Main-140
Pilot-120
N/S 1.5 (stock)
Pop off spring-95g
Low screw- 1 turn
High screw- 1.25 turns




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I've been looking far and wide for that info! would you mind elaborating on the setup (flame arrestor, any porting, ect). also you may want to put that in the carb jetting database thread.

 

[bach6177]

I've been looking far and wide for that info! would you mind elaborating on the setup (flame arrestor, any porting, ect). also you may want to put that in the carb jetting database thread.

A/M flam arrestors, carbon tech reeds, stock porting. Ada head 185 compression. Lightweight RAD flywheel, MSD Enhancer with stator 3 degrees advanced.


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[750bpx2]

now that set up wont flood out when i mash the throttle right. i need optimal thrust and responsiveness. Also what pitch would i be able to push without slipping

 

[bach6177]

Nope, won't flood out. I have it in a aftermarket freestyle hull. I am running a 13/18 concord I believe .


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[rowsto]

Just to throw a spanner in the works try this
Main 105
Pilot 115
2.3 needle
80g spring

I had a similar setup and it worked well

 

[750bpx2]

ill see what happens. everything effects these things like temp altitude and humidity