jetting size and restrictor

dmotors · #1 28-12-2012, 04:50 PM

i have a 4 port kit for my evo 9 i have 1000cc inyector size im planing to use up to 30 psi of boost and to get 20% and a mix 50/50 .

i calculated 0.4mm jets, what restrictor i have to use if the calculation is ok

Richard L · #2 02-01-2013, 09:32 PM

Please allow a bit more head room for the calculation. Small jet suffers more losses.

I think a 0.7mm restrictor is about right.

dmotors · #3 03-01-2013, 03:32 AM

Thanks richard , my calculation is ok for the aquamist jets ???

Richard L · #4 03-01-2013, 07:08 PM

The calculation on the lower limit. I would increase the pump pressure by 1/2T clockwise. approximately +25psi to allow you a bit more head room. If it is too much, you can always raduce the flow with the "gain" trimmer.

dmotors · #5 04-01-2013, 03:57 PM

Ok thanks richard ill check out that

Richard L · #6 05-01-2013, 12:08 AM

Can you tell me what is your target power.

A direct port is good but I think you should consider putting one jet at the exit of the intercooler to improve you charge air cooling. I think have one medium size jet will give you that extra ceiling I was talking about. A 0.7 or 0.8 mm is about right.

It is so easy to reduce the overall flow but sizing the restrictor.