Which adjustment would be the correct way to adjust the fuel. Turbo efficiency or fuel multi .... i have good solid a/f all through but i'm having to run 66psi. the turbo efficiency is at 120% and the multiplier is .68 with blue tops. stock b20 at 8psi the car runs solid and puts down 12.9 in the quarter.

i still need to work on idle but its a track car.

 

HAHA what?

66 psi? at that psi you should be at the same altitude as commercial aircraft.

 

im assuming he is talking fuel pressure which is pretty high

 

ya fuel pressure.. it is very high i would like to be able to drop it back to the 43 psi but it starts to lean out at about 5500rpms. everything else is perfect. i'm street tuning right now and the cars drives great but wont idle it just wants to idle hop and between 800-500rpms and die. i'm still trying to figure out the correct way to adjust the fuel in the needed areas. I need more fuel across the board to drop the fuel pressure but i only really need more fuel when the boost hits 6.5 psi. Do i change the turbo efficiency or each individual cell?

 

what are you tuning with

 

You need to drop your fuel pressure back down to around 43 psi. Then adjust your fuel multiplier to where you are back in the good a/f ratio area. If you are then having trouble with it leaning out under boost, get some larger injectors. Also wouldn't hurt to hook up a fuel pressure gauge and see if when it is leaning out if the fuel pressure is dropping. If it is, then getter a higher volume fuel pump. You should be running atleast a walbro 255..

 

I'm using crome pro i have dsm injectors on bone stock b20 that should be enough. the turbo is a tiny .48. i have a fuel pressure gauge and a walbro 255 and lc-1 wideband. I have covered my *** on the fuel side. everything seems to be fine but i with the fuel pressure up but i would like to have it lower.

i have a friend thats goin to drive tonight will i adjust a few things.

 

i have it down to 50 psi. i upped the fuel multi to .75 and changed a few cells. I was also able to get the car to idle. just a little more time i should have it.