mustangsho

My car was falling off hard core around 4800 rpms. so i hooked up a wide band and played with some timing. the air fuels were coming off around 13.2 to 14.0 wot I thought thatwas pretty lean. It has 45psi at idlewith pressure regulator unpluged.Anyone no where a good air fuel is onthis thing just for reference


I hooked up the stock air meter for ****s and giggles it was at about 10.2 wot

It has a stock low end,. It has e 303, 1.7 crane rockers, 1.94 intake valve, 1.60 exhaust valve, .0200 milled off the e7s, heavier valve springs, mac shorty headers, straight pipes to flowmaster dumps 24 lb injectors, pro m 75 mm mass air, mac cold air fenderwell ,typhoon upper and lower, 70mm throttle body and egr spacer

TTGreenSN95

im just learning about this stuff myself but my car runs faster around 11.7 a/fim sure whatever cam and maf heads and stuff they all want something different mine just faster when I put it here. I tried 13.20 a/f but it was weak on the top like you said if that helps you any

mustangsho

That make alot of sense cause mine falls off hard up top. We knew that was to rich. My fp is at 43 lb and timing is perfect. i keep hearing about rotating the maf housing i have not got to do that yet????????????

mustangsho

I ment it was rich when i put the stock maf on.

TTGreenSN95

I ran a 14.20 with it set at 11.70
Iran 14.60 with it set at 13.20
these where the only things i changed it just felt weaker with the 13.20.
I never ran the car with it set lower than 11.70 but i put it on 11.30 and took it around the block and it didn't like that at all....it huffed and puffed i guess 11.30 was to rich. To really figure it out im guessing you need a dyno or a timeslip.....

r.barn

14.7 is the theroretical pefect lean/rich.

Most cars run a little better rich of peak in the high 13's
10-11 is where boosted engines run.

TTGreenSN95

I was thinking the stock setting was 12.50@WOT ????