Opinions on where i should start my jetting

[Whitty21]

I have looked at previous threads to try and find someone with similar mods like mine. But i was unsuccesful. My jetting is spot on right now with a dynojet kit. its a dxp350 jet, which i believe is about 270.

Heres my mods now:
K&N filter
No airbox lid
stock pipe, lame i know, savin up for an f7

Now why i am rejeting is that a redesigned head from oconnoracing.
Ken says it should step it up a jet size or two, i was thinking of getting jets from 280-300.

What do you think?

 

[scotj77]

I would do whatever ken says. he designed it. he would know best.

 

[Whitty21]

the problem is that i am not sure what size i have now, so i dont know where to go up from

 

[Whitty21]

i was also wondering if i should change my pilot jet, it is still stock

 

[scotj77]

what if you just order more dynojet jets. get 370-400 or call dynojet for a crossreference.

 

[scotj77]

pilot is probably ok. just my opinion though

 

[Whitty21]

Thanks man, but dynojet only sells those stupid jet kits and i hate them, i looked on their site for a cross reference and didn't see anything. It's alot cheaper to get them from the local dealer.

 

[slipknot23]

CONVERSION FOR KEIHIN TO MIKUNI TO DYNOJET Jets_R_Us_conversion_chart_mikuni_vs_dynojet_vs_keihin_sizes

 

[scotj77]

If it was mine. and i still had the stock exhaust i would probably start around 280 and work my way down from there. so buy 250-280 with the head work you wouldn't really increase flow so the jetting isn't going to go up much. with the other mods you have i would guess you are going to land around 260 270. that the minuki jet numbers

 

[scotj77]

CONVERSION FOR KEIHIN TO MIKUNI TO DYNOJET Jets_R_Us_conversion_chart_mikuni_vs_dynojet_vs_keihin_sizes

with some math you could figure out what your jet is but thanks for tryin slipknot

 

[Whitty21]

i tried the math, it isn't even somewhat linear, dynojet is just chinsey and kinda guess. anyways the call the jet i have a dxp350 jet. using the approximate average i found that miki jets are approx. 0.9375 smaller i would still need a 330 miki. clearly the kit hets arn't involved in the same kinda math. i guess i will just guess more than i figured. stupid dynnojet kits

 

[scotj77]

I tried it too it wasn't linear at all. just some made up numbers. on dynoports side.
I would try calling them direct. i can't see you needing to be jetted anywhere near that high unless there are more engine mods that you aren't aware of. don't forget you will need a needle too.

 

[Whitty21]

haha well the argument that is gunna come up is that i have an air leak covered by fat jetting, which i know for a fact i dont have. i will just get some jets and a whole bunch of plugs for plug chops

 

[scotj77]

sounds like a plan. best of luck to ya.