JDM still no tune

[KrisR]

Jim... did you see the comment earlier about "Predicted Air Charge Protection" in the tune being Enabled, and needing to be Disabled...what the hell would that have to do with a car running lean at WOT?

You would think that if the "Predicted Air Charge Projectection" ...anything... would cause the car run fat rich? Yet with this enabled it seems to be making the car run lean... go figure...

Side note...at least on my car, the timing got yanked at the same time the car went lean also. My tuner was commanding, say, 19 degrees, and it would make that until around 4500rpm when the timing would drop to about 12 degrees and it would go lean. I guess that this "feature" looks at the load and it flips out if the load goes over 100% (as most FI vehicles do) and tries to recalculate stuff to make the load go down.

 

[PNR Welding]

Mine did the same thing until my tuner found the problem. "Predicted Air Charge Protection" in the tune was still Enabled, and needed to be Disabled. Not sure if this is happening to yours.

Same thing happened when I changed tuner from JDM to Modern Muscle right after I did the build and went from 3.0 pulley to a 2.75. Eric Brooks told us to turn it off and then it took the fuel that was commanded. Jim Sr can try the hack system (not recommended) and pull fuel from the base till they figure it out. That way he is not making pulls on the lean end.

 

[dragpac]

JDM still couldn't figure charlies car out so he went there and picked it up so he can get a cage and TRY to get it tuned.a friend told him about this guy in Del. that tuned a 08 Z06 that ran8.80's.so after a few hours I'm told they figured out that the car was being tuned for 42lb injectors when it has 60's and the overdrive wire at the trans had to be pulled.it made 560rwhp.and ran a [email protected] at atco last night.now it will get the lower pulley 15%underdrive and more fine tuning.

 

[timfoster405]

Are you saying the new tuner was able to look into JDM's tune and see that their tune was set up for 42 lb vs. the installed 60 lb injectors?

I thought JDM and other tuners "locked" their tunes out and other tuners can't look inside the tunes to see how things are set-up?

 

[PNR Welding]

JDM still couldn't figure charlies car out so he went there and picked it up so he can get a cage and TRY to get it tuned.a friend told him about this guy in Del. that tuned a 08 Z06 that ran8.80's.so after a few hours I'm told they figured out that the car was being tuned for 42lb injectors when it has 60's and the overdrive wire at the trans had to be pulled.it made 560rwhp.and ran a [email protected] at atco last night.now it will get the lower pulley 15%underdrive and more fine tuning.

Are you guys sure that the problem was the injector table? I know that Jim Sr. is a pretty damn good tuner and when ever he tuned my car he would have you fill out a form and you would list your mods on it. I dont think Jim Sr. would overlook injectors.

I actually met Charlie at Atco last Thursday, was talking to him about his car till my battery went dead cause of running the fan for too long. We were talking about the shifter in my car and he said if they couldnt figure it out, they were picking the car up and going elsewhere. Im suprised that the other shop was able to fix it so quickly and JDM couldnt. When I first got my car, there was an issue that I thought would never get fixed till SCT updated there software and after a few hours Jim figured it out.

Congrats on the time also. 6.70 is nice. That is probably around a 10.50 - 10.60.

 

[dragpac]

I'm only saying what the new tuner said to charlie,as far as I know what was inside JDM's tune the box was locked even after charlie ask him to unlock it.the other guy went into the stock computer.

 

[07 s197]

Whats the reason for unplugging the overdrive at the trans?

 

[dragpac]

I'm not sure,charlie told me it had trouble starting when it was hooked up.the tuner is raceproven motorsports in claremont,del.

 

[Pumpkinfish]

I'm surprised we haven't heard anything more from JDM. I would like to hear the whole story. I live in the Philly area and my frind is from Delaware and I've never heard of these guys. Not saying thats bad or good, just saying I've never heard of them.

 

[JimIII@JDM]

Yea we technically couldnt figure it out before he picked the car up but we had found what we thought to be the culprit was a cut wire in the fuel system harness and the main power wire was twisted together, not such a secure connection.....

We didnt get a chance to dyno it after that since Charley had to get his car to the roll cage shop. We told him to bring it back after to get it tuned. If he is using someone else then good luck with it!

 

[dragpac]

Yea we technically couldnt figure it out before he picked the car up but we had found what we thought to be the culprit was a cut wire in the fuel system harness and the main power wire was twisted together, not such a secure connection.....

We didnt get a chance to dyno it after that since Charley had to get his car to the roll cage shop. We told him to bring it back after to get it tuned. If he is using someone else then good luck with it!

first of all this is me talking and not charlie,theres no technically about it.you had the car for a very long time and it still had a fuel problem.you told charlie to bring it back so you could what (fix it somemore) Jim sr. is your dad and JDM is your shop so I don't blame you at all for defending them but to me personally I thought it was rediculous.that what couldn't be figured out in many attemps was cured in a few hours.IMO

 

[NastyStang113]

LOL... Christs sake...

 

[GJP05]

Sounds like the car was fixed before you had it picked up but it was never put on the dyno to prove it. Then the new shop put it on the dyno and said they fixed the issue by tuning it.

 

[Natural1]

Yea something was really screwed up with this car when it was put back together. We are doing the best we can with what we were given. Its really pissing us off too now!

We'll get it figured out...

If I had a dollar for every time I had a problem like this, I would have enough money for someone else to work on my car.

Sounds like the car was fixed before you had it picked up but it was never put on the dyno to prove it. Then the new shop put it on the dyno and said they fixed the issue by tuning it.

Very possible..

 

[AMChrisRose]

Just a quick note on this, because I've seen it a million times before...

A shop gets backed up and the owner decides to pull it for whatever reason before the car gets to be fixed. Maybe it was on the backburner because they were extremely busy or whatever the case was... that's not really why I posted...

The reason I posted is to say, who says the problem is fixed?

I've seen many cases where I see something I don't like in a tune file, where the car will still dyno fine but could over time develop an issue, etc. Some places don't take the time to fix it or know the difference so "there are no problems". They're not datalogging, they don't catch it, there's a million things that could happen.

There's a good chance that maybe JDM was seeing some weird returnless voltage stuff that has an affect on transient fueling, etc. They could have seen battery voltage trying to compensate for a draw to keep pressure from dropping at WOT? Maybe it was an alternator or battery issue, ground, wiring, whatever. I don't know the specific issue. Someone else (RPM in Delaware) comes along and makes a pass on the car without datalogging fuel pump voltage at the table and voltage at the pumps but gets a somewhat stable air/fuel plot and calls it a day. What the hell the voltages are adaptive, right? They don't know anyway, all they see is decent pressure and somewhat stable AFR's and the car makes power. Voila... tuned... WRONG.

That's the difference. If the problem was fixed, I'd recommend you have a shop look at it who specializes in S197s. I know RPM in Claymont, DE... I'd trust them with my LS-based Chevrolet all day long. Fran's a good kid. I wouldn't ever bring them an S197. Then again, there's probably less than 10 individuals I'd trust with an S197 for tuning.

Just sayin... maybe you should let JDM tune it. Let them take another stab at it. If they get jammed up I'd gladly help them. Sr/Jr/Ned are great dudes.

 

[dragpac]

if someone puts a motor in a car and hooks everything up would it sound right to you if they told you I'll start it up next week to see if it runs?as far as who got it running it's pretty clear to me.JDM said it could be the trans was wired wrong.the trans swap was done on L.I. and thats when the trouble started so why not drop the trans so you can follow the wires in the tunnel and find out for sure how it's wired.it's not like charlie is a penny pincher ,do the work find the problem and get paid.Fran did more than strap it on the dyno and presto.

 

[NastyStang113]

And this is the very reason why shops hate working on other people's fuck ups.

 

[timfoster405]

Hey Chris...sounds to me like you miss strapping the cars down and "really" tuning them instead of the "virtual" mail order stuff... Ha Ha !!

 

[dysan]

Just a quick note on this, because I've seen it a million times before...

A shop gets backed up and the owner decides to pull it for whatever reason before the car gets to be fixed. Maybe it was on the backburner because they were extremely busy or whatever the case was... that's not really why I posted...

The reason I posted is to say, who says the problem is fixed?

I've seen many cases where I see something I don't like in a tune file, where the car will still dyno fine but could over time develop an issue, etc. Some places don't take the time to fix it or know the difference so "there are no problems". They're not datalogging, they don't catch it, there's a million things that could happen.

There's a good chance that maybe JDM was seeing some weird returnless voltage stuff that has an affect on transient fueling, etc. They could have seen battery voltage trying to compensate for a draw to keep pressure from dropping at WOT? Maybe it was an alternator or battery issue, ground, wiring, whatever. I don't know the specific issue. Someone else (RPM in Delaware) comes along and makes a pass on the car without datalogging fuel pump voltage at the table and voltage at the pumps but gets a somewhat stable air/fuel plot and calls it a day. What the hell the voltages are adaptive, right? They don't know anyway, all they see is decent pressure and somewhat stable AFR's and the car makes power. Voila... tuned... WRONG.

That's the difference. If the problem was fixed, I'd recommend you have a shop look at it who specializes in S197s. I know RPM in Claymont, DE... I'd trust them with my LS-based Chevrolet all day long. Fran's a good kid. I wouldn't ever bring them an S197. Then again, there's probably less than 10 individuals I'd trust with an S197 for tuning.

Just sayin... maybe you should let JDM tune it. Let them take another stab at it. If they get jammed up I'd gladly help them. Sr/Jr/Ned are great dudes.

So who's going to tune yours now that you got one?

Heh...couldn't help myself.

 

[NastyStang113]

So who's going to tune yours now that you got one?

Chris already ordered a tune from Justin @ VMP.