c32kompressor

i dynoed stock at 330.2 whp and 327.4wtq, now i have a custom pulley and i cant break 12's! maybe im running to lean? where and how could i get my air fuel ratio checked? and if im running to lean where and how could i fix that? im pretty concerned about this :/

Gramma_Benz

If you're running too lean, you will actually get a CEL showing a lean condition code.

To check your AFR, you will need to get a 02 sensor bung installed in your exhaust, prior to your primary CAT which is a total B**ch. Then get a wideband datalogger such as this:

http://needswings.com/Zeitronix-DashDAQ-Touch-Screen-Display-and-Datalogger-DashDAQ.aspx

You're probably running a little leaner...but nothing I'd worry about considering the size of your pulley.

But you would definitely get a benefit from getting a custom ECU Dyno tune.

moosejaw

how did you get up to 330 whp stock?

ohlord

a less generous dyno.You would be hard pressed to break 300 h.p. at the wheels
stock.
A much much much less generous dyno

pcasey06

prob a dynojet, not a mustang dyno (loaded)

Zeppelin

What did the car run stock? 12's are not guaranteed with a pulley. You could even have belt slip causing lower boost.

c32kompressor

The dyno was a dynodynamics. The car is faster than another c32 with the same mods I can guarentee, I don't know what it ran stock. Never raced it stock. I am the third owner, maybe the previous owner did something??

TemjinX2

you can run lean and not get a lean code. I had afr in 15-16afrs and still not get a lean code. Just get a dyno with the afr.

Gramma_Benz

My bad, actually, mine was a hidden code, it didn't trigger a CEL. My code reader didn't show it, but my mechanic's reader could.