zippy

At 13psi on a 6.0L, unless you have two 63mm turbo's, you're way out of turbo. The small turbo is why it peaked early. I'd say the mess after that is either valve float or an ignition problem. It is possible that the dyno rpm trigger was having issue's also.

2ktransam

iTrader: (12)

I was thinking the same thing. I have a MPT70 on my 6.0L and I had to turn my boost controller all the way up to get 12.5-13psi. I might have to step up to a MPT76 next year.

SpoolinChevy

Hopefully there's no real problem and everything on the log's look good. I was looking at eventually upgrading turbo's but not this soon.

zippy

If I had to bet I'd say at the track you'd be quicker at 8-10psi than pushing that turbo hard. If you push the turbo real hard you'll get inconsistant flow as well as alot of heat from it. Unless it's a hybrid turbo I wouldn't go smaller than a 76mm on a 6.0L. Some of the hybrid turbo's are very impressive and can push the needed air with a smaller wheel. They are just very expensive.

SpoolinChevy

76mm is what i was thinking.I think i saw somewhere KB carries mp76's but I'm not totally sure. Do they still use the t4 flange? I was thinking 4" exhaust to go along with it, I'm not sure i could fit a 4" dp with that also. I ran 3 or 4 times earlier in the night at my regular 10-11#'s, but i let out at the end not knowing if they were going to let me keep running or not so i never got a good number at my original boost.

Spoolin

iTrader: (8)

You ever upgrade turbo?

nonnieselman

iTrader: (10)

Kinda old post that frenchy dug up..
but it could be the dyno spark signal is pickup up noise?
Mine looked a lot worse than that graph until Josh hooked up the injector signal wire instead of the one that goes over the Spark plug wire.

Worked great after that..

Spoolin

iTrader: (8)

I'm trying to catch up man...can't you cut a brother a little slack?

nonnieselman

iTrader: (10)

NOPE... i got some catching up to do also... :nunchuk1:

Atomic

iTrader: (42)

This is what spark retard looks like