what the hell is causing this restriction with my tune???
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.
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.
the kpa is 98 and at 5000 the kpa goes down to 94 and stays there.
Originally Posted by 30th t/a
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.
the kpa is 98 and at 5000 the kpa goes down to 94 and stays there.
Originally Posted by 30th t/a
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.
the kpa is 98 and at 5000 the kpa goes down to 94 and stays there.
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.
Originally Posted by Frost
It sounds like your injector tables may need some work.
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
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Originally Posted by ringram
75mm lid->85mm MAF->90mm TB/Intake..
94kpa under WOT, Hmm where is the restriction I wonder..
75mm lid dude!
94kpa under WOT, Hmm where is the restriction I wonder..
75mm lid dude!
He's got problems with his tune and stock injectors.
Originally Posted by INTMD8
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.
If you send me a log file I'll look at it.
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.
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
those injectors do seem awefully small tho. some 36lb sound about right for u
Originally Posted by 30th t/a
yea thats him
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.
Originally Posted by Phoenix 5.7
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
those injectors do seem awefully small tho. some 36lb sound about right for u
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.
