pwrtrip75

iTrader: (8)

HP tuners 2 bar
5.3 - single turbo
TH400 - Car was originally an auto car.

I think ive had this issue for a long time. Even my track runs with the glide last year in it I checked my logs and I short shifted at about 5000rpms.


Problem is more visible now I have a TH400. I logged the A/F And in all of my boost settings, 10psi, 14psi, and 18psi, they are decent and do not take any sudden turns. 10psi im tapering down to about 12.0:1 , 14psi is 11.7:1 and 18psi is 11.5:1 Timing is about 20* at 10psi and goes down to 14* at 18psi (93 octane).

I originally thought 1st gear was just too low and im blowing the tires off (street tires) and with a 3.00 gear I just shift to 2nd and from 3000-4500rpms it pulls great. I been monitoring my VE table and took it past 5000rpms today in second, rev limiter at the same spot.
The car runs great, turns on hard, but hits the rev limiter at about 5200-5300. I have all the fuel cut-offs at 7500. I am not sure what is going on....maybe I missed something?

Anyone want to look through this file and see if I overlooked something?
Thanks.

1slowbusa

iTrader: (8)

It looks to me that your fuel cutoff is at 7500 rpm. Did you check your injector duty cycle to make sure you were not going on range? I just briefly looked at your tune but would like to see a scan.

pwrtrip75

iTrader: (8)

They are 80# injectors w/ base pressure set at 60psi. I think the most i seen it was low 60% duty cycle. I formerly ran the car on E85 with a different combo, its got a new Magnafuel external pump, -10 main line Y'd off to -8 to each rail, -8 return. Now on 93 octane. Im quite confident my fuel system is more than sufficient for this setup.

What would you like me to scan specifically?

1slowbusa

iTrader: (8)

I just want to get one thing straight, the car is an auto or manual.

I would at least scan the RPM, Speed, Dyn Air, inj duty, IAT, TPS, Commanded AFR, your Wideband, KR, MAP, Advance, ECT, INJ B1(msec) and bank 2, O2 B1S1 and B2S2 at a minimum. Oh and fuel pressure if you have it connected to your HP tuner module.
That way we can see at least a base as to what the car is doing.

Its just odd to me that the rev limiter is activating at 5000rpm since the parameters in your tune are not set up to.

pwrtrip75

iTrader: (8)

It might not be the rev limiter, it acts like one. And it does it at the exact same RPM in 1st and 2nd gear. I just put new plugs in also, pulled some fuel out and slowly addded it back in making runs.....wanted to make sure the plugs were not fouled and make sure it wasnt loading up on fuel. Doesnt matter what boost level its at when it cuts out but everything is fine until it gets to that RPM. Different spots on the VE map from 10,14, 18psi of boost all dialed in really damn close which leads me to believe its not fuel related and something to do with RPMs.

Iva also logged everything, I dont save them though, i'll have to make another one. IAT's are low, never go above 90*. Timing is listed in 1st post. There is no MAP, this is 2-bar SD. TPS is at 100% working fine, speed is irrelevant, does it in 1st and 2nd gear, cant test 3rd gear 5200rpms w/ 3.00 gears would be too fast..lol.

I'll go make a few passes now....

jimmyblue

iTrader: (11)

You need to look at injector pulse width and the spark
advance; which is accounting for the power cut? One
or the other ought to do something, abruptly, at the
RPM where this happens.

That number for RPM is sorta close to where people
with bad knock sensors see trouble a lot; even though
this is not a '98 LS1, this could be the deal; valvetrain
noise spoofing knock sensors or something else that's
rattly at the wrong time?

pwrtrip75

iTrader: (8)

Here are a couple screen shots. 1st pic is on 10psi boost A/f is right at about 11.9:1 before it hist the 5200 wall.

2nd pic is on 14psi boost and around 11.3-11.5

There is no KR.

It wont let me upload my configuration file, says it is an invalid file. Without that you probably cant view my log attached.

pwrtrip75

iTrader: (8)

hmmm. I may have found something. Im an idiot...lol. I had my car setup with some monster 160# injectors last year and on E85 and different engine. I since swapped engines and put it back to gasoline. Im sure what I did is copy and pasted a stock VE table in and started over tuning.... Not realizing I had the previous VE table so altered and the PE table also altered to work together. Note the PE table and what it does at 5200... No rev limiter..... super flood and loading it up.

Ive since started using notepad and keeping a journal of all the changes I make and why. Unfortunately my car sits down for so long I lost track.

Or else those parameters got keyed in accidentally.....hmm. not sure why i'd have such a jump in the PE table. Weird.

1slowbusa

iTrader: (8)

Look at your WOT EQ power enrichment at 5200rpm you are commanding 1.880. 14.63/1.880 is 7.78 AFR. Is this what you want to command at WOT?

1slowbusa

iTrader: (8)

Ah you found it the same time i did.I think this will help correct the problem.

pwrtrip75

iTrader: (8)

Last year I had 3 fuel pumps in tank, they were messed up and i was running out of fuel. Must have done that to see if i could get more and never changed it back. oops.
I knew I missed something somewhere.... lol.

1slowbusa

iTrader: (8)

Sounds good at least you found it yourself, good job. Good luck.