Lean dyno.
Melting Slicks
Joined: Aug 2005
Posts: 2,960
Likes: 112
From: New Braunfels TX
I agree with your assessment and by first looking at the file this would tell an experienced tuner right away if it was actually the problem. I was telling the OP to have someone set the P/E table pig rich to eliminate the tune possibility and then if there was no change richer then look to the fueling side - specifically the stock pump or the BAP.
BUT...
It is impossible that the problem has anything to do with the change from Florida air to Texas air. I know this for a fact from lots and lots of experience both personal and from tuning out of state cars. And I'm not saying that you said this because I wasn't there and have no idea, but if you did then that is what I am referring to with my comment.
With boosted cars going lean the most common problem I have seen is usually a fueling issue, because even a dumb tuner can set the P/E table value high enough to get the A/F ratio in the high 11's before the car leaves his shop.
BUT...
It is impossible that the problem has anything to do with the change from Florida air to Texas air. I know this for a fact from lots and lots of experience both personal and from tuning out of state cars. And I'm not saying that you said this because I wasn't there and have no idea, but if you did then that is what I am referring to with my comment.
With boosted cars going lean the most common problem I have seen is usually a fueling issue, because even a dumb tuner can set the P/E table value high enough to get the A/F ratio in the high 11's before the car leaves his shop.
Drifting
Joined: May 2002
Posts: 1,479
Likes: 42
From: Dallas / Ft. Worth The Republic of TEXAS
My point still stands that to see if you have a fueling problem you command a lot more fuel and see if the A/F ratio changes on the dyno. Whether you increase VE at WOT (if there is a VE table) or raise the PE ratio it is simply a diagnostic test to see if you have a fueling issue or not. How you command the extra fuel makes no difference really.
Maybe that crazy Texas air that's messing up tunes has gone to your head
Last edited by OBSSSD; May 19, 2013 at 10:19 PM.
Melting Slicks
Joined: Aug 2005
Posts: 2,960
Likes: 112
From: New Braunfels TX
Last edited by JMBLOWNWS6; May 19, 2013 at 07:40 PM.
Drifting
Joined: May 2002
Posts: 1,479
Likes: 42
From: Dallas / Ft. Worth The Republic of TEXAS
Now if you don't understand the concept of adjusting the PE table to diagnose a fueling problem then I'm not sure you should be diagnosing anyone's car. But now I'm done with this discussion because I learned a long time ago if you argue with an idiot they just pull you down to their level and then beat you with experience
Cheers!
Melting Slicks
Joined: Aug 2005
Posts: 2,960
Likes: 112
From: New Braunfels TX
Well since I have never "raped" a PE table in my life if your car had that done to it then it wasn't tuned by me. RPM had HPTuners and did quite a few of their own tunes, but I have no idea what they adjusted on them and frankly I don't care. I was the only tuner in town for a long time who tuned the positive trims out first and then flatlined the PE table where I wanted to command the A/F. This was at a time when all the shops in town were doing exactly what you just accused me of, and thanks to this that's why I tuned hundreds of cars in a short time frame for a lot of really happy folks.
Now if you don't understand the concept of adjusting the PE table to diagnose a fueling problem then I'm not sure you should be diagnosing anyone's car. But now I'm done with this discussion because I learned a long time ago if you argue with an idiot they just pull you down to their level and then beat you with experience
Cheers!
Now if you don't understand the concept of adjusting the PE table to diagnose a fueling problem then I'm not sure you should be diagnosing anyone's car. But now I'm done with this discussion because I learned a long time ago if you argue with an idiot they just pull you down to their level and then beat you with experience
Cheers!
I had RPM (CJ) install it and you tuned it. I called you on the way home and told you I had issues and a SES light. Your excuse was I didnt have enough time to get it all squared away. Then when I finally got smart enough to look into it and you did exactly what I stated. On a no cat car you had the rear 02's enabled and couldn't even uncheck a no report. I have been part of cars you can never touch on the street or the track. So stop trying to act perfect when you are far from it. Im not perfect either but you make this sound like we dont know what we are doing and you are sadly mistaken. But thanks for trying. 
Last edited by JMBLOWNWS6; May 21, 2013 at 06:51 AM.
Former Vendor
Joined: Nov 2006
Posts: 187
Likes: 3
Yes.
The P/E table should be set to what you want to command in terms of actual AFR at wide open throttle. Raising it will richen the car up but it is not the "correct" way of doing it i.e. Raping the P/E table. Similar to Raping the Injector tables which should also be used as constant values.
The correct methods being, as already stated, via the MAF and/or virtual VE tables.
That said, the 60's should be plenty of injector at that power level with regular gasoline and the meth injection should provide even more head room.
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Le Mans Master
Joined: Jul 2010
Posts: 5,977
Likes: 719
Yes.
Yes.
The P/E table should be set to what you want to command in terms of actual AFR at wide open throttle. Raising it will richen the car up but it is not the "correct" way of doing it i.e. Raping the P/E table. Similar to Raping the Injector tables which should also be used as constant values.
The correct methods being, as already stated, via the MAF and/or virtual VE tables.
That said, the 60's should be plenty of injector at that power level with regular gasoline and the meth injection should provide even more head room.
Yes.
The P/E table should be set to what you want to command in terms of actual AFR at wide open throttle. Raising it will richen the car up but it is not the "correct" way of doing it i.e. Raping the P/E table. Similar to Raping the Injector tables which should also be used as constant values.
The correct methods being, as already stated, via the MAF and/or virtual VE tables.
That said, the 60's should be plenty of injector at that power level with regular gasoline and the meth injection should provide even more head room.
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
When I got my car on another tuners dyno it was hitting 13.5-13.7. Luckily I had suspected the tune was junk and I was there for a re-tune that day. By the end it was making more power much safer.
Good luck getting yours squared away.
Good luck getting yours squared away.
Burning Brakes
Joined: Apr 2007
Posts: 972
Likes: 11
From: Dawsonville, GA
If the car is meth injected, I would look into that also.
My tune is a "meth-dependant" tune. Before driving away after getting mine off the dyno, the tuner told me: "Whatever you do... ALWAYS be sure you have meth in that tank"
My tune is a "meth-dependant" tune. Before driving away after getting mine off the dyno, the tuner told me: "Whatever you do... ALWAYS be sure you have meth in that tank"
Thread Starter
Burning Brakes
Joined: Feb 2010
Posts: 1,066
Likes: 21
I think we should be able to get it squared away pretty easily once we get it back up for a tune.
Safety Car
Joined: May 2006
Posts: 4,016
Likes: 93
From: St. Louis, MO
Tech Contributor
Thread Starter
Burning Brakes
Joined: Feb 2010
Posts: 1,066
Likes: 21
Car has a fuel pressure gauge, and as stated before I saw no drop in fuel pressure but maybe I missed it when paying attention to AFR.
