2001 Procharged Trans Am - Tune Check

[blindsquirrel]

VE had better be over 100%, or that belt driven hairdryer ain't doing it's job.

[Evil Phoenix]

It's quite alright for this to have over 100% VE. It happens in NA engines also.. When you see like 130% it's likely compensating for falling fuel pressure or something.

This one was probably extrapolated out in boost numbers he can't hit right now anyway.

Even though I clearly had the wrong MAP sensor selected when I did those data logs, i do log the fuel pressure. Does the fuel pressure look to be lower than you would have expected or want?

[Evil Phoenix]

VE had better be over 100%, or that belt driven hairdryer ain't doing it's job.

What would you anticipate the "highest" value be if you had to predict it? My work computer is pretty locked down so I cant review the file from here, not until I get home.

[blindsquirrel]

Depends on how much power it makes, which is more to do with what it'd make N/A and not solely the amount of boost.

[Evil Phoenix]

I cant post the image through this computer but on a dynojet it put down 662.68whp and 544.18tq

I wish the image I have also showed the AFR vs target but I didnt own it when this was completed.

[abc]

It's quite alright for this to have over 100% VE. It happens in NA engines also.. When you see like 130% it's likely compensating for falling fuel pressure or something.

This one was probably extrapolated out in boost numbers he can't hit right now anyway.

I noticed 125 percent VE at 165 kpa, 4800 rpm, is that alright?

[Evil Phoenix]

Being completely new to this car and not knowing a ton I didn?t repoll for supported parameters then select the correct manifold pressure sensor. I had the stock SAE sensor that is not a 2 or 3bar like the tune is.

I was told that was my problem. Due to weather I haven?t been able to get new logs but I will soon.

[edcmat-l1]

Injector data not being correct combined with what the PE is commanding, the slope of the VE is going to incorrect. Numerically it's pretty close to what it should be but they never look like that when they're correct. Not that interpolated slope look.

It does look like somebody was swaggin the data to get it to idle decent. Between the transient min and min PW tables whoever was tooning it was trying to get them under control down low.

I'd be really surprised if that's Pat G's work. Just the PE would lead me to believe it isn't.

[blindsquirrel]

What is the deal with FIClinic's SPA data? Their sheets are all like that, just a straight line between two points. No other real, accurate data has an SPA that looks anything even remotely like linear.

[Evil Phoenix]

So Fluid Motor Union is down the street from my house and I spoke with them about them taking the car and addressing the tune. Have their help with getting these things dialed in a little better.

OJ said that he has about 3 cars in front of me and he would need the car for about a week. I?m looking forward to that experience.

I will get the car out and take some new logs so that you may help identify areas of specific concern.

I clearly has the wrong MAP sensor being monitored. Set the p0101, 102 and 103 to mill on first then what other PIDs should I add or update when logging so that I get good logs.

I know when driving I need to do my best to fill out all the areas in the VE table, loads and excel and such so as to provide the most data possible. But if I?m not capturing the appropriate PIDs it?s not going to be as helpful as it could be.

What list of them should I add or update to the correct one?

[edcmat-l1]

If you're taking it to someone to have them iron it out, leave it alone. I don't want someone bringing me a half-baked cake and expecting me to finish it. Personally I'd wipe it clean anyway just because everyone else has had their nose pickers in it.

[Evil Phoenix]

I?m not trying to add to the mess but if there are specific issues I can update so they don?t have to it would be helpful, no?

That way I?m not paying for them to alter things that have been identified as wrong.

As for the list of PIDs, bringing good logs to have something to look at before strapping it to a dyno would be helpful, right?

[edcmat-l1]

I?m not trying to add to the mess but if there are specific issues I can update so they don?t have to it would be helpful, no?

That way I?m not paying for them to alter things that have been identified as wrong.

As for the list of PIDs, bringing good logs to have something to look at before strapping it to a dyno would be helpful, right?

When you take your car to a qualified tuner you shouldn't have to tell them anything besides what parts are in your car. They should be able to diagnose any issues. If they're qualified, they do not need your help and probably, like me, don't want your help.

[Alvin]

What is the deal with FIClinic's SPA data? Their sheets are all like that, just a straight line between two points. No other real, accurate data has an SPA that looks anything even remotely like linear.

the equivalent of SPA for Ford is linear.

When I convert Ford data to GM with my own stuff it comes out as linear and it works. Better than not having it for sure.

[SiriusC1024]

What is the deal with FIClinic's SPA data? Their sheets are all like that, just a straight line between two points. No other real, accurate data has an SPA that looks anything even remotely like linear.

Ford data is like that. Probably has to do with whoever is calibrating. It works well enough, but not ideal.

[Alvin]

I made a spreadsheet to back out GM data from Ford data a long time ago. I had it publicly posted but took it down after finding another tuner posted it with the fields moved around and with their logo at the top.
Anyway.. I learned a lot about the two characterization strategies..

ford injector vs GM.jpg