VERY lean AFRs up top help please!!....
#16
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Since you are using a fmu, the fuel pressure will increase with boost unlike if you just had a normal fpr that remains constant which you could see fuel pressure with the car just idling.
If you can dump the fmu and just tune the injectors, i would go that route personally. Just keep the a/f between 11.5 and 12:1 and you will be fine. Also, you may want to put back in a normal head gasket to bring the c/r back up since it will give you more power throughout the rpms since you arent out there running 20+ psi
If you can dump the fmu and just tune the injectors, i would go that route personally. Just keep the a/f between 11.5 and 12:1 and you will be fine. Also, you may want to put back in a normal head gasket to bring the c/r back up since it will give you more power throughout the rpms since you arent out there running 20+ psi
#18
Since you are using a fmu, the fuel pressure will increase with boost unlike if you just had a normal fpr that remains constant which you could see fuel pressure with the car just idling.
If you can dump the fmu and just tune the injectors, i would go that route personally. Just keep the a/f between 11.5 and 12:1 and you will be fine. Also, you may want to put back in a normal head gasket to bring the c/r back up since it will give you more power throughout the rpms since you arent out there running 20+ psi
If you can dump the fmu and just tune the injectors, i would go that route personally. Just keep the a/f between 11.5 and 12:1 and you will be fine. Also, you may want to put back in a normal head gasket to bring the c/r back up since it will give you more power throughout the rpms since you arent out there running 20+ psi
well it is a daily driver so i wanted to be on the safe side with the lower compression ratio, even if it meant a loss in power...
as for getting rid of the fmu, you think i'll get enough fuel pressure to comp with the injectors with just the walbro and the ecu???
#19
Since you are using a fmu, the fuel pressure will increase with boost unlike if you just had a normal fpr that remains constant which you could see fuel pressure with the car just idling.
If you can dump the fmu and just tune the injectors, i would go that route personally. Just keep the a/f between 11.5 and 12:1 and you will be fine. Also, you may want to put back in a normal head gasket to bring the c/r back up since it will give you more power throughout the rpms since you arent out there running 20+ psi
If you can dump the fmu and just tune the injectors, i would go that route personally. Just keep the a/f between 11.5 and 12:1 and you will be fine. Also, you may want to put back in a normal head gasket to bring the c/r back up since it will give you more power throughout the rpms since you arent out there running 20+ psi
ROAD/RACE
#21
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You cant control the fmu as well as leaving the fp constant and tuning the injectors. Plus 550cc is way overkill for what you are running. People with vw/audi's are making 325+ with 440cc injectors @3bar (45psi) fp. If you ever need more, you can increase base fp to 3.5-4bar (440@4bar ~= 550cc@3bar)
#24
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the specs of 440cc injectors mean thats what they flow at ~45psi. but as far as your lean condition idk. i have stock injectors with a 12:1 fmu and its kinda exhibiting the same problem... it will reach 12.5 afr at about 7.5 to 8 psi of boost. but i have a stock engine with no airflow mods so it will overboost after about 5000rpm to 9-11 psi and cause it to lean out too much(13-13.5).
#26
oh ok. kinda had a brain fart there. fpr regulates fuel pressure seen at the rail. im gonna just run the stock fpr and see how it changes the afr then.... i should be okay as long as i dont boost too much right? cuz wont i be even leaner without the fmu?
#27
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I havent used the ecuflash. When i had my lancer it was basically rrm piggy or a fmu and i used the fmu. How does it let you control fuel, by rpms or just overall adjustments?