KLUG'S SS

iTrader: (6)

Got a problem on my 2003 SS I noticed that when I am rolling about 20 or 30 mph and I mash it down to kick it into first gear I am seeing between 6 and 8 degrees of knock retard but the weird thing is that when I punch it right off the line from a standstill there is no knock retard at all and there also isn't any when I kick it down at passing speed like 60 mph. I am only seeing it at a 20 or 30 mph roll. Anybody have any suggestions?

CAMMIN03'

iTrader: (1)

What do you mean by Knock retard???

BlownChevy

iTrader: (20)

It would help if you list your mods...if any.

KLUG'S SS

iTrader: (6)

On my Predator in the diagnostics the knock retard on there says 6-8 degrees and when it does my truck feels doggy as hell

speedy02

iTrader: (2)

Do you have any screen shots?Are you using HP Tuners.

KLUG'S SS

iTrader: (6)

right now i just have a cam 216/224 551/551 115, headers, k&n filter, and a shitty predator tune. getting a tune from nelson soon.

CAMMIN03'

iTrader: (1)

You know, my buddies 03 SS had a tune from PCMforless.com and it was skipping at about 30-35 when he would nail it... he switched his tunes out and it doesnt do it anymore....

KLUG'S SS

iTrader: (6)

yea that piece of **** predator that I have probably isn't helping any. sorry if I seem a little dumb on this this tuning stuff is a whole new thing to me.

BlownChevy

iTrader: (20)

I think a dyno tune will fix the problem....It sounds like the cam does not like the predator tune. Probably a little too much timing.

BigTex

iTrader: (16)

Its the downshift. Mine does it too. If I nail it and have it shift down on its own, it will have KR. If I manually shift from say 3rd into 2nd then nail it, I usually get no KR. I think this is some torque management function.