2 bar map sensor Options

[jesterwr217]

ok im currently using check valves and im wondering what i have to do to put a 2 bar map sensor on just take out the map sensor and put the new one in and replace the check valves with regular vac hosing? and i have an safc 2 what do i need to change on it so my ecu isnt all screwed up? and if anyone has a link to somewhere i can buy one that would be great

[NuclearHappineS]

How come you guys NEVER understand this ... it's so simple..

Ghetto setup
This setup is only good for 5psi.

Stock FPR, 8:1 to 12:1 FMU, stock injectors, HIGH PRESSURE fuel pump (walbro 255HP) , stock map sensor + Checkvalves or instead of a check valve use a turboXS boost cut defender (FCD) or a greddy Boost Cut Controller (BCC) or an HKS FCD


Proper setup

Stock FPR, NO FMU, DOUBLE your injector size, regular low pressure fuel pump (walbro 190LP or 255LP), 2 bar map sensor, NO check valves, NO BCC, NO FCD

This setup is good for 12 to 14psi (depending on your exact SAFC settings and how close your injectors are to the ideal sized injector your fuel cut will vary in that range from 13 to 15psi)

Insane Ghetto setup (like for a 350-400hp setup on a stock ECU)
2.0 bar map sensor
FCD or BCC (BUT NO CHECK VALVES)
3:1 FMU
Double your injector size
Walbro 255HP or even a dual walbro 255HP setup

with a setup like this if you start with 400cc/min at idle, the FMU will make them act like 700cc/min injectors at 20psi

This setup is geared good for 450 crank hp @ 20psi of boost

Insane non ghetto setup (and possibly horrible idle setup)
2.5 bar map sensor
2.5 times your stock injector size
no FCD
no BCC
no Checkvalves
no FMU
Single Walbro 255LP (low pressure)

This setup is typically good for 350-380hp @ 18psi of boost (which is where you find your fuel cut)

OK so the summary.

If you are going for more than 5psi, don't use an 8:1 FMU.
If you are not going to make 450hp don't mix an FMU with bigger injectors
If you use bigger injectors don't ever use a check valve
If you use bigger injectors always use a 2.0 bar map sensor
Don't EVER use the SAFC IN/OUT settings to trim your fuel, use a 2Bar map sensor and the right sized injectors instead.

Idle at 17:1 to 15:1 AFR is OK
Part throttle at 15:1 to 14:1 AFR is ok
In boost your target should be 12:1 to 11:1 AFR

This post has been edited by NuclearHappineS: Aug 7, 2007 - 1:47 PM