Cub jetting

[RNBRAD]

Just curious as to what and where people are jetted at on their cubs? 421 with 35mm pwk's: 160 mains, 55 pilots, CEL needle mid clip. I'm at 600 elevation and 80 to 90 degree temp. Pre-mix 40:1. This is spot on for me, what is everyone else getting?

[locogato11283]

35mm pwk, vf2's, rockets, k and n clamp ons

 

162 main, 45 pilot, CEL needle i think...

[FASTOYS]

Brad , i guess you got that thing going ?! That jetting sounds close .

[RNBRAD]

Brad , i guess you got that thing going ?!  That jetting sounds close .

413811[/snapback]

 

Oh yea but still taking it easy.

[23champ]

I was running 158 mains in PWK 35mm, I pulled the plugs out after several passes on the strip and the plugs looked a little rich so I dropped to a 150, which was all I had at the time, now its a tadd lean.....152 or 155 ought to be about right for me

[locogato11283]

damn ed, all the way down to 150's?? my plugs look just right with 162 and might possibly be able tyo drop down to 160s..our setups arent that much different...you have case porting in yours? wonder what gives??

[odaen]

Pipes? He's running CPI's to your Rockets.

[23champ]

damn ed, all the way down to 150's?? my plugs look just right with 162 and might possibly be able tyo drop down to 160s..our setups arent that much different...you have case porting in yours? wonder what gives??

413889[/snapback]

 

 

I matched the cases to my old cylinders, and beleive it or not they are pretty damn close to the cub cyl.

[RNBRAD]

Champ, what's your pilot at? You running open filters? Tyler your running a leaner pilot than I am and I really could go up a size on it cause I'm just a half turn out from seated on the air screw. The differences are interesting.

[23champ]

50 pilot, CEL middle, mains at 150 (need to be at 1152 or 155).

[23champ]

yeah, K&N pods

[23champ]

damn ed, all the way down to 150's?? my plugs look just right with 162 and might possibly be able tyo drop down to 160s..our setups arent that much different...you have case porting in yours? wonder what gives??

413889[/snapback]

 

You runnin a highly oxygenated fuel also. I'm not, i run VP C12

Edited September 11, 2005 by 23champ

[badassbanshee479]

I am running 160 mains in my 39 pwks and its just a touch on the rich side

don't remember what pilot and needle I have I will have to go check.

[89Steeda]

148 Main 48 Pilot and CEL in the middle. 4mill Cub,68 bore, 35 PWK's at sea level.Case is ported.

[locogato11283]

Pipes?  He's running CPI's to your Rockets.

413896[/snapback]

i wouldnt think theres be 3 or 4 main jet size difference between them, but i could be wrong...

 

I matched the cases to my old cylinders, and beleive it or not they are pretty damn close to the cub cyl.

413900[/snapback]

yea i remember u told me that now. mine are perfectly matched with cairos case porting he did on my cylinders.

 

You runnin a highly oxygenated fuel also.  I'm not, i run VP C12

413925[/snapback]

didnt even think about that...by the way, how much does that shit run?? same shit u run in the 500 im guessing?? this oxygenated seems to work pretty well for us..i think its about 4.25 a gal..we just buy a 55 gallon drum of it..