fuel pump question

[jmd]

i have a bosch 044 fuel pump. i will be doing a pulley swap tp a 3.70 size which will increase boost to about 11psi. it is now at 8.8 at 6500 rpms. i run 60 psi injectors and a corvette fuel bucket but have stock fuel rails. the afr was 12.6 at 6500 on the old dyno sheet . do you think it will handle it? i am unable to attach the old dyno sheet on this post.

[slow94]

thats too lean. It needs to be around 11.6.

[WWhittle]

thats too lean. It needs to be around 11.6.


i wouldn't necassarily say that- every car is different. His car might like leaner but with less timing. LS1 vs. Mod Ford for example is much different.

You should try to datalog the duty cycle of your pump, injectors and rail pressure, along with A/F.

[jmd]

the avg. afr on the dyno sheet is 11.9. and the min is 11.6. the max is 12.6

[slow94]

i wouldn't necassarily say that- every car is different. His car might like leaner but with less timing. LS1 vs. Mod Ford for example is much different.

You should try to datalog the duty cycle of your pump, injectors and rail pressure, along with A/F.


yes I agree, but the general concesus is that you don't want to go above 12to 1 unless you are running higher octane regardless of what the amount of timing it can hold. I know that my truck is a pushrod motor and not a mod motor and that it doesn't like the high a/f ratio with timing. I'm sure that there are exceptions, but most people no matter what the motor or type of car will run a a/f ratio between 11:1 and 12:1 on street octane.