12secSS

iTrader: (30)

Have him post the tune here. It sounds like he may be modifying the VE Table, but the MAF is not tuned properly. Is he tuning via the VE Table or MAF, should be the MAF. No other table should be touch to get the AFR to match the commanded, what is it commanding. You need to post up a log file as well. To me it sounds related to the MAF, either mechanical or calibration wise.

30th t/a

iTrader: (51)

I found out from my tuner that in the PE tables, he is seeing .6 at 6500 and .26 at 6900. From what he told me he is usually seeing 1.1 1.2 & 1.3.

the kpa is 98 and at 5000 the kpa goes down to 94 and stays there.

Violatorno1

iTrader: (3)

I'm taking it you mean he's seeing those figures in the BEN map while logging where .6 is showing rich. This is where the tune and a log file could really help sort you out.

Frost

iTrader: (45)

Not taking a stab at him, but any tuner should know that commanding below 1 in PE DOES NOTHING since stoich is specified and 1 is stoich.... It sounds like your injector tables may need some work. He's steady taking away from your PE and beating it up on the dyno while not realizing that he is doing NOTHING since he is looking in the wrong place.

edcmat-l1

iTrader: (10)

The PE is way outta wack. Hes right in that they are usually around 1.1-1.2
See if he can fill the pe table with a stock pe, and then the same with the maf table. Use a stock tune from the same year, and just copy/paste. Basically, start over.
If the pe is out that far, somebody didnt know what they were doing.
as for the map, it looks ok, not pulling a vacuum, so no restriction.

edcmat-l1

iTrader: (10)

I was thinking the same thing. IFR is off, and hes compensating in the PE only, and cant get enough fuel out of it. WOW!!
YEP. Put it back to stock and start over. And this time start with the correct values in your injector flow rate, and everything else will fall into place. Real close anyways.
Usually, you only need to tweak the PE table in the HUNDREDTHS. That is .0x

amwellls1

Wow thats scary

Billiumss

iTrader: (11)

Is your tuner Steve Pilic by chance?

30th t/a

iTrader: (51)

yea thats him

qqwqeqwrqwqtq

How much power is it making? Does the maf reading correlate with the rwhp?

If you send me a log file I'll look at it.

ringram

75mm lid->85mm MAF->90mm TB/Intake..

94kpa under WOT, Hmm where is the restriction I wonder..

75mm lid dude!

My90Iroc

iTrader: (26)

That's not the problem. The diameter of the opening in the 75mm lid and 85mm maf are basically the same. I have my 85mm maf butted up to my 75mm lid. Remember the stock 75mm maf fits inside the 75mm lid. I also run a 90/90 setup. FWIW I also completely ported my maf and the lid still doesn't create a restriction. I always see 100 kpa under WOT and on the right day I'll see some 105's.

He's got problems with his tune and stock injectors.

30th t/a

iTrader: (51)

453/411 with the lid seeing 94kpa with 12.3 a/f and 458/414 with no lid on and 12.8 a/f and 96kpa.

Im not sure if the MAF correlates with the MAF. I know very little about tuning. Thats why I paid a experienced tuner to do this and here I am now.
Im going to be buying HP tuners and LM-1 after a **** load more research. I can see Im going to have to educated on LS1 tuning.

Violatorno1

iTrader: (3)

The best thing you can do. Start with reading all the sticky tuning docs. Redhards blog can give you alot of good info too.

Phoenix 5.7

iTrader: (7)

is ur tuner sure he has a good 85mm maf table in there? or do u have a stock maf u could put in place to see if it still does the same issue?

those injectors do seem awefully small tho. some 36lb sound about right for u

Billiumss

iTrader: (11)

Steve is a smart cookie!

He use to work for GM doing some engine dynoing/tuning for them when the LT1's were hot and did a little tuning on the LS1's before they went full production. I'd say he knows what he is doing.

He taught me a few things, this must be one heck of a problem child for him.

I have to give him a call one of these days to shoot the **** with him.

30th t/a

iTrader: (51)

Im buying some SVO 30LB injectors, fabbing up a 4" diameter, custom twin cone CAI and I do have my stock MAF for the next time I go out there. Steve Insist that my 85mm MAF is good and my lid & filter is a definate restriction. I know its not the best but I honestly done think the lid & filter are behind this problem.

30th t/a

iTrader: (51)

Well I took my car to a local dyno place to get looked at. I found out that my old tuner did not scale my MAF for the Z06 style. The guy that tuned my car yesterday said the old tuner had it scaled as a LS1 style MAF and thats why is would go rich in the upper RPM band. The car seems to pull much better now and has much better throttle response.