Set up Questions??

[Nick k]

Info please

B18FT
1 bar of boost
249cc injectors
Standard throttle body
T2 blower.
FSE adjustable fuel reg.

This is what i got. ( Lap on Mallory last year)

Cold idle 10.1 AFR
Hot idle 11.2 AFR

On boost at 1 bar 15.0 AFR !!! ( Reading using standard fuel regulator)

Now it maybe lack of fuel pressure on boost causing crap AFR on boost.

What setup would people recommend?? 32mm bypass?? Does the maf pot adjust fueling at idle only??

Just after a good proven setup then i can fine tune it on the dyno.

Cheers
Nick.

[SCHWARTZ]

Has is the man to speak to really. Think a 32mm hole will be to big for those injectors, what ones are they? Maf adjusts idle and until it sees 5v. Set the bypass hole for fueling with wot then adj maf to suit for idle.

[Markey Mark (BD)]

What fuel pump you using Nick?

[SCHWARTZ]

Also I'm having probs with far regs so mark has sorted me a standard reg and rail. You only need a rising rate reg if you're forcing std injectors prob ok for 18psi boost max. for that you will not need a bypass hole.

[Robbo]

i am/was running
15 psi boost
standard injectors
no bypass hole
clio rsi fuel pump
standard tb
standard cam
scoff mod
afm set to 650ohms
all done as cheap as possible
car runs really well but does not want to hot start now,no idea of afrs as i didnt have the time to check and setup so set the afm to 650 to be safe. survived a trackday at donnington and the drive there and back clocking 120mph on a private road.
The turbo, injectors, and fuel pump are probably on their limits now tho

[Nick k]

What fuel pump you using Nick?

Clio 1.8 16v pump in tank jobby.

[Markey Mark (BD)]

Clio 1.8 16v pump in tank jobby.

Thats cool that'll be up for the job

Do you know what you set your afm to and also whats the fuel pressure reg set to on the reg?

[Nick k]

Nope to both! Not used the adjustable FPR yet but its on standby, using the OE reg when reading where taken as i have a scoff AFR ting in there . What does that maf screw actually do? Can check the resistance now, Whats pins is it again??

[SCHWARTZ]

Reg needs to be set to 3bar with the pump running and the engine off.

[Markey Mark (BD)]

The screw on the maf will adjust the ohms, if remember its the 2 outer pins you check mate.

Ah thats cool well the standard reg should do fine unless thats got fault in it and causing it to loose pressure

[Nick k]

390.28 ohms

[SCHWARTZ]

That's standard matey you need to turn it clockwise to IIRC 650ohms.

[Nick k]

Ok, set the maf to 650 ohms, fuel pressure is 45 psi at idle with vac connected, with vac disconnected its oscillating betweem 40 and 50 psi with a needle wiggle. AFR are 11.1 at idle hot.

[Nick k]

Fuel pressure has gone up slightly as engine is not running, was 45 psi at idle with vac. Is that correct??

[SCHWARTZ]

Wants to be around 42psi without engine running so that's prob ok. It will drop when engine is running as injectors are bleeding off some of the pressure.

[Nick k]

So what did it change when i adjusted the maf from 390 to 650 ohms. will that give me more fuel on boost and bring the AFR down to a safe level??

[SCHWARTZ]

Nope that will adj idle and light throttle. The only way to richen the fueling up is to either run less boost or fit bigger injectors. If you are using a rising rate reg you should be able to get 18psi boost with standard injectors fueling ok.