Injectors Maxed Out?
you need to log injector duty rate and rpm, then visit this web site http://smiley.tzo.com/fbody/atap/af.htm and check rpm vs ms to find percent.
Injector duty cycle is inaccurate to say the least. I seen my duty cycle hit a 116% while making a pass a the track. I confrimed with my in car WB the car never went lean AFR was 11.5-12.4 and this is on stock 00 (26 lbs/hr) injectors
Edit
I see you are boosted my response is for the NA guys since you will prolly want a little cushion for a rainy day
Edit
I see you are boosted my response is for the NA guys since you will prolly want a little cushion for a rainy day
TECH Apprentice
Joined: Jan 2003
Posts: 308
Likes: 0
From: Mission Viejo CA
James what size injectors are you now running now and what makes you think your injectors are maxed out?
In your sig you list your A/F at 11.5 which tells me your not leaning out at WOT on the Dyno. When I was on the dyno a couple of weeks ago we were making runs trying to get my A/F below 12.5 on a nitrous shot and after I seriously tweaked the PE table it should have been pig rich but still wouldn't get below 12.5 on the 125 dry shot of nitrous. We concluded that the injectors just didn't have anymore to give becuase no matter what changes we made to the table the A/F wouldn't go any lower. I'm making close to the same HP on 26# injectors so I would think you still have a way to go before you hit the top end of yours, didn't 42# injectors come with the S-Charger?
By the way if your AutoTap doesnt measure them I have a scanner that does.
In your sig you list your A/F at 11.5 which tells me your not leaning out at WOT on the Dyno. When I was on the dyno a couple of weeks ago we were making runs trying to get my A/F below 12.5 on a nitrous shot and after I seriously tweaked the PE table it should have been pig rich but still wouldn't get below 12.5 on the 125 dry shot of nitrous. We concluded that the injectors just didn't have anymore to give becuase no matter what changes we made to the table the A/F wouldn't go any lower. I'm making close to the same HP on 26# injectors so I would think you still have a way to go before you hit the top end of yours, didn't 42# injectors come with the S-Charger?
By the way if your AutoTap doesnt measure them I have a scanner that does.
