RT195/30mm PHBH/BGM clubman set up.
Posted: Thu Feb 25, 2016 9:47 am
RT195/60x110 crank/BGM clubman/30mm PHBH. BGM ignition 17deg by strobe, no advance retard set up.
Port timings set up as per MB advice (piston level with lower edge of transfer of transfer port at BDC)
Using a flip choke set up to ensure the choke is opening and closing correctly and not affecting the rest of the jetting.
Start point set up ( combination of advice from BGM tech notes and the guy who built my engine)
Pilot 55
Choke 70
Main 125
Needle X2 2nd clip down from top
Atomiser AV266
Slide. 40
Float. 3.5
dialled in the air screw, it now starts well and ticks over nicely
It pulls away fine and from about 1/4 throttle fells juddery and lumpy ( which I diagnosed as too rich)
First iteration
Needle X2 raised clip to the top (lowers the needle to weaken the mix)
All other jets remain the same
That cleaned it up nicely and it now Picks up to above 1/2 throttle.
Next step is a good run to move it fully up and down the gears, check out the main jet and get a plug colour.
Final set up Advice from others who have set up this combination would be helpful as it would give me a target to aim at and identify possible issues if they are way outside the ballpark.
Port timings set up as per MB advice (piston level with lower edge of transfer of transfer port at BDC)
Using a flip choke set up to ensure the choke is opening and closing correctly and not affecting the rest of the jetting.
Start point set up ( combination of advice from BGM tech notes and the guy who built my engine)
Pilot 55
Choke 70
Main 125
Needle X2 2nd clip down from top
Atomiser AV266
Slide. 40
Float. 3.5
dialled in the air screw, it now starts well and ticks over nicely
It pulls away fine and from about 1/4 throttle fells juddery and lumpy ( which I diagnosed as too rich)
First iteration
Needle X2 raised clip to the top (lowers the needle to weaken the mix)
All other jets remain the same
That cleaned it up nicely and it now Picks up to above 1/2 throttle.
Next step is a good run to move it fully up and down the gears, check out the main jet and get a plug colour.
Final set up Advice from others who have set up this combination would be helpful as it would give me a target to aim at and identify possible issues if they are way outside the ballpark.