950 SPI engine clutching and jetting help asap

[trevor_zr600]

i dont know where to start with clutching and jetting on this engine SPI gives no specs im wondering if someone could help

 

[winter brew]

Need more info....What RPM are you aiming for? What is the claimed HP at that RPM? What altitude? Track length? What chassis and what clutches are you running? gearing? What tuning parts do you already have to play with?

 

[trevor_zr600]

its a 2004 rev 800 chassis 144 track 21/43 gears tra 3 primary and an r.e.r. secondary

so far i have a dalson pin kit that goes to 25 grams and a 40/44 dalton helix i will buy whatever i need to make it run perfect the motor revs to 7800 rpm

 

[winter brew]

I would just run it with the 415 ramps, 160/320 spring, try your 44/40 and throw some additional pin weight at it (18g?) and see what it needs from there. Tough to say on something like that what will work good. Did the engine builder have any suggestions for a start point?