Posted: Sat May 13, 2006 5:24 pm
The VE table is simply a percentage of the reqfuel baseline. Work the other way around. First set your reqfuel the tweak the ve table.
I picked my base reqfuel going off what other 914 people used. Stock 2.0 Bosch injectors are HUGE(24lb/hr i think) for this application. You will get a feel for it when adjusting reqfuel. My car idles with an AFR of around 15 with reqfuel at 9ms and the VE table entry at idle (1000 - 1500rpm, 27 - 33kPA) aroudn 20%. Look at your pulsewidths at idle, mine around about 1.5ms i believe.
I'm sticking with PWM and avoiding going to resistors to limit current. I found an oscilloscope in my house so i'm going to look at my outputs when the car is running and go from there.
Is your MAP signal stable? If your car is too aggressive then you won't get a clean MAP signal in which case you will have to try something else... ie: alpha-N, etc.
Check for leak by spraying carb cleaner at the suspect points on the intake. Your rpm should drop. As always throw a timing light on and check timing at idle.
Good luck
I picked my base reqfuel going off what other 914 people used. Stock 2.0 Bosch injectors are HUGE(24lb/hr i think) for this application. You will get a feel for it when adjusting reqfuel. My car idles with an AFR of around 15 with reqfuel at 9ms and the VE table entry at idle (1000 - 1500rpm, 27 - 33kPA) aroudn 20%. Look at your pulsewidths at idle, mine around about 1.5ms i believe.
I'm sticking with PWM and avoiding going to resistors to limit current. I found an oscilloscope in my house so i'm going to look at my outputs when the car is running and go from there.
Is your MAP signal stable? If your car is too aggressive then you won't get a clean MAP signal in which case you will have to try something else... ie: alpha-N, etc.
Check for leak by spraying carb cleaner at the suspect points on the intake. Your rpm should drop. As always throw a timing light on and check timing at idle.
Good luck