pulley #'s equal boost #'s

[Ratpack]

Last year I had 24 pulleys on the top and bottom and had 7 lbs of boost. I told MPI that I wanted 10 lbs and they sent me a 26 tooth for the bottom. Now it has 15 lbs and is running lean. Any ideas?

 

[Riceburner]

Makes no sense.

22/26 is 5.5 ish psi.

26/22 is 10.2 ish psi.

No way 26/24 should be 15 psi.

Bad guage? Obstruction somewhere after the boost pick up.

 

[Ratpack]

no it doesn't. The chart says that combo should be 9.2 lbs. Wouldn't an obstuction in the boost line make it show less boost. I am going to change back to 7 lbs and see what happens.

 

[quebecmoutainrider]

what kind of controller do you have...if a gems..then you can adjust the richness in the idle ,midrange,WOT.positions..this should solve your problems/

 

[Ratpack]

Nope. Its an RX1. I think that it does not have good vaccum so it's not raising the needles like it should. Now I just need to find out where the vaccum comes from and what is wrong with that.

 

[sledhead_dan]

Where are you measuring boost, before or after carbs ?

 

[millstreet]

need to measure boost after carbs, intercooler will show higher boost #s