DATALOGGING FIND NEED TO KNOW

05mustang_kb_charged · May 19th, 2007, 03:26 AM

I am data logging my car and Mass Air is reading 4.8 volts and the fuel injectors are 39# and showing 92% duty cycle. All I did was up the boost on a 2.8l Kenne Bell, The A/F Ratio is around 12.1-12.3 at WOT and just cruising it's about 15.6-16.8 average. I got the kit with 8 psi. and upped to 10 psi. and was told not to worry about it and the dyno is closed for another week or two. Could it be the tune or maxing stuff out. I was told the mass air was good for 535 rwhp and injector for 515 rwhp

impetus · May 19th, 2007, 07:03 AM

i believe you need a new tune. 15.6-16.8 is way too lean. fuel pump seems to be keeping up ok (WOT).

i went to the Kenne Bell website and found this...

"you may be suprized to see the air fuel ratio is the same WITHOUT RE-TUNING, even with HP jumping from 401-469 and boost from 5.5-9.5 psi."

did you log any data @ 8 psi? who does your tunes?

05mustang_kb_charged · May 19th, 2007, 12:35 PM

the tune came with the supercharger, the fuel pump cycled on and off and kept delta between 40-60 psi. i am waiting foe Shreve's Automotive to open back up to get the car custom tuned. Steve is one on the better tuners in South Louisiana. Never datalogged injector, mass air was 4.3 and fuel was about the same.

May 19th, 2007, 03:26 AM	#1
05mustang_kb_charged Hardcore Enthusiast 2005 Mustang GT Dyno Racer Join Date: Mar 2007 Location: LSU Country Posts: 2,272	DATALOGGING FIND NEED TO KNOW I am data logging my car and Mass Air is reading 4.8 volts and the fuel injectors are 39# and showing 92% duty cycle. All I did was up the boost on a 2.8l Kenne Bell, The A/F Ratio is around 12.1-12.3 at WOT and just cruising it's about 15.6-16.8 average. I got the kit with 8 psi. and upped to 10 psi. and was told not to worry about it and the dyno is closed for another week or two. Could it be the tune or maxing stuff out. I was told the mass air was good for 535 rwhp and injector for 515 rwhp

May 19th, 2007, 07:03 AM	#2
impetus Regular Join Date: Apr 2007 Location: up state Posts: 51	i believe you need a new tune. 15.6-16.8 is way too lean. fuel pump seems to be keeping up ok (WOT). i went to the Kenne Bell website and found this... "you may be suprized to see the air fuel ratio is the same WITHOUT RE-TUNING, even with HP jumping from 401-469 and boost from 5.5-9.5 psi." did you log any data @ 8 psi? who does your tunes? __________________ /impetus

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May 19th, 2007, 12:35 PM	#3
05mustang_kb_charged Hardcore Enthusiast 2005 Mustang GT Dyno Racer Join Date: Mar 2007 Location: LSU Country Posts: 2,272	the tune came with the supercharger, the fuel pump cycled on and off and kept delta between 40-60 psi. i am waiting foe Shreve's Automotive to open back up to get the car custom tuned. Steve is one on the better tuners in South Louisiana. Never datalogged injector, mass air was 4.3 and fuel was about the same.

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