Blown Interceptor

iTrader: (5)

I suck at Excel, and I am wondering how you are suppose to average the LTFT's? From the spreedsheet, they look decent to me, but I could be way off?

I will attach, if anyone wants to check it out??? Or give some advice on what to do...

Thanks,
Jason

jimmyblue

iTrader: (11)

Don't go by averages, they only obscure the real deal.

You want no values above zero and the rest as close
(but not over) as possible. Averages tell you nothing
useful. The HPTuners histogram is a clear way of
viewing data, though you also need to know which
fuel trim cell pertains to a given MAP, RPM to make
final sense of the trim "map" in the histo. Alternatively
you can select the RPM, MAP, FTC and LTFT columns
(ctrl-click the column headers) and then choose
Data>Sort and sort by FTC ascending. This will
rearrange the data by trim cell, page through it
and you will see where in MAP and RPM you have
fueling that's off base.

Blown Interceptor

iTrader: (5)

Thanks for the reply!

I am looking over the data, and my O2 sensors @WOT are 880/920, on the average. I am having a problem w/detonation and lowered my timing when I spray(100 Wet) to 26*. I am wondering if the detonation is lack of fuel? Is the 880/920 lean? I could add a bit more fuel when I first to spray @3600rpm.

Thanks,
Jason

Lady Redhawk

iTrader: (6)

I didn't see any knock at WOT. You are running a little lean though.

dvanorder

I did a sort on TPS and you indeed have no KR at WOT (or anywhere else). Looking a little rich at WOT, though narrowband O2's are by no means precise measures of AFR. B2S1 is consistently over 900 mv. B1S1 looks rich towards the end of your WOT run (low .9's) and more reasonable in the .88's for the earlier WOT points. Someone will correct me if I'm wrong, but it looks like fueling isn't your issue at WOT. With no KR recorded, why do you think you were detonating?

Lady Redhawk

iTrader: (6)

I would imagine that he has his timing set at about 27 degrees at WOT but the scan shows it drops down as low as 25 degrees or so. But it is not pulling timing because of knock.....Needs a tune.

Blown Interceptor

iTrader: (5)

Thanks for the graphs Lady Redhawk!

I pulled timing @WOT w/HP Tuners and set timing at 26* and it still detonates. My last dyno showed an average of 12.5, not on the spray. When I sprayed, it was 13.1, then it went down to 11.5...a little too rich.

Keep the ideas coming...

Thanks,
Jason

Blown Interceptor

iTrader: (5)

I think the reason I don't see KR, is I desensitized the Knock Sensors with HP Tuners, most likely not the best idea in the world.