Ryan23silverado

iTrader: (1)

7.50g/cyl??? the table only goes to 1.2g/cyl

Grams per Cylinder is figured by: [(grams per second) x 15] / engine RPM

Here is one of my older timing tables just for referrence on the lower rpm numbers (i'm boosted too, so you can get away with more -be aware of knock):

marc_w

Here is my latest table.

I was way wrong - I'm only at the mid-teens down low - I looked at a log and thought I was set to 20 down there.

I just looked at one of my runs at the strip, and I'm actually getting something very similar... I just never paid any attention to it.

Here's it is...

This was before headers... and I cut a 2.13 at full street weight and near full tank of gas. I thought that was fair, so I never looked into the timing dip.

ktmrider

Are the 03+ trucks running drive-by-wire TB's? If so maybe the electronics are not reacting fast enough when snapping the throttle wide open from idle. I know my father's 04 Furd and my 03 Hemi does not have the crisp throttle response that the cable/TPS system has. Just a thought...

marc_w

Yeah, 03's are running DBW... Mine definitely has nice sharp throttle responce, but I'm not sure about how quick it's opening vs a standard cable TB. You can get an idea of how mine opens - it's the green line in my scan above...

Black Blown 02

I have an 02 with a cable throttle and the same timing problem.

MagRagC5

I have HP also and have the same problem. Are you throwing a code 101 MAF error? I was and changed the code trigger values- it seems to have worked SOTP, but I haven't mapped it since.

Ed

speedy02

iTrader: (2)

Oops,I was wrong.It's at 0.63g/cyl.. Im going to try playing with the High octane timeing table a little and see if that works.When would i have to use the low octane timeing table?Dont it read off that table if you get bad gas or alot of knock?
Mark_w for some reason i cant see the tables in the links..I get "Unable to load graphics conversion filter".I would like to see them.
It's throwing no code.

Ryan23silverado

iTrader: (1)

Did you figure this out on your timing yet?

speedy02

iTrader: (2)

I have been adding a little timeing to 60-72g/cyl to 2000 rpm at a time and it looks a little better..But, Im still getting the timeing dip..What would smoothing do?