Bama tune 2011+ (moved)

[linnE]

Good to hear but I was not referring to your tunes. I was asking Kingcrab

 

[Seer]

Yes same day same dyno.
If it is so adaptive (which it is I cant really argue there) then why was power such a difference between Lund and the Bama tune?
If headers wont effect incoming air then why does it change power output and powerband. Granted it is a huge gain but its something. Must be because airflow has changed. A lesser restriction would promote a better incoming flow to a certain degree.

so where do your headers suck in air that affects your MAF?

You are removing air faster and changing the exit angle and velocityt of the air. You are not affecting the measurement of the air coming in that changes the fueling required. Your car goes into open loop at WOT and follows commanded values for fueling.

Again, there is more than peak power. I can write you a tune file with 13.0+ Air Fuel and crank timing to the point of detonation. It'll run like shit, but she'll get you a pretty dyno sheet for a few pulls.

 

[Bodam]

These threads ruin this forum

 

[Kingcrabb]

Just curious. Did you work with both tuners using specific PIDs datalogged to build your tune? Or did you just ask for revisions to your tune?
When comparing tunes did you verify each tune to make sure it is safe?

It was on Bama's dyno. When he was done I asked if I could load my Cam tune to see if there was a difference. The point at that time was not to compare to see which made the best power. But it turned out that there was a significant power difference.
And I would hope that both tunes were safe. That would make for shitty business if either one wasn't...

 

[Seer]

It was on Bama's dyno. When he was done I asked if I could load my Cam tune to see if there was a difference. The point at that time was not to compare to see which made the best power. But it turned out that there was a significant power difference.
And I would hope that both tunes were safe. That would make for shitty business if either one wasn't...

did you know I can make your car show you have 200 more hp than you really do on a dyno?

 

[stkjock]

It was on Bama's dyno. When he was done I asked if I could load my Cam tune to see if there was a difference. The point at that time was not to compare to see which made the best power. But it turned out that there was a significant power difference.
And I would hope that both tunes were safe. That would make for shitty business if either one wasn't...

so there were a few pulls done while Mike worked on the tune and go you that 5-10 hp mentioned above? Then you loaded the cammed tune and did the pull? I got that straight ?

post # 175

I sent an Email to Mike directly, Told him I got headers and requested some dyno time. He brought me in on a slow day and dyno tuned my car...for free.
To add to that the base pull (email tune) to the final pull (dyno tune) was only a gain of 5-10 hp.

 

[JEWC_Motorsports]

did you know I can make your car show you have 200 more hp than you really do on a dyno?

Quote of the FUCKING day!!!!!!!!!!!!!!!!

 

[Kingcrabb]

so where do your headers suck in air that affects your MAF?

You are removing air faster and changing the exit angle and velocityt of the air. You are not affecting the measurement of the air coming in that changes the fueling required. Your car goes into open loop at WOT and follows commanded values for fueling.

Again, there is more than peak power. I can write you a tune file with 13.0+ Air Fuel and crank timing to the point of detonation. It'll run like shit, but she'll get you a pretty dyno sheet for a few pulls.

No one said anything about peak power.
If I put the stock exhaust back on (full stock exhaust) datalogged the MAF then ran my headers and catback Im sure the Maf value will change. Will it be a huge difference probably not but it will change.

 

[Witt]

No one said anything about peak power.
If I put the stock exhaust back on (full stock exhaust) datalogged the MAF then ran my headers and catback Im sure the Maf value will change. Will it be a huge difference probably not but it will change.

Maf voltage feedback will change, calibration will not.

This is why there is air metering in the first place.

 

[Kingcrabb]

did you know I can make your car show you have 200 more hp than you really do on a dyno?

Yes. Non of the dyno values were changed.

 

[Seer]

No one said anything about peak power.
If I put the stock exhaust back on (full stock exhaust) datalogged the MAF then ran my headers and catback Im sure the Maf value will change. Will it be a huge difference probably not but it will change.

the amount of air you bring in, does not affect your calibration. This is why we have Mass Air Flow Meters.

The intake tract angle is what determines if you need a new calibration.

 

[Seer]

Yes. Non of the dyno values were changed.

Coming from a company that also likes to advertise before numbers on 87 and after numbers on 93, I will stick with reality.

 

[Kingcrabb]

so there were a few pulls done while Mike worked on the tune and go you that 5-10 hp mentioned above? Then you loaded the cammed tune and did the pull? I got that straight ?

post # 175

HUH?

I brought my car in. First pull was the email tune that Mike sent me. He then did a few more pulls while fine tuning the tune. The final pull when tuning was done was only a few HP different the the first pull.
I am saying that his email tune was pretty much spot on.

Then when tuning was done we loaded the Lund tune (i was standing the window of the car while he sat in the driver seat) and did another pull to see what my Cam tune made.

Maf voltage feedback will change, calibration will not.

This is why there is air metering in the first place.

So if the Maf voltage changes than that obviously means headers effect incoming air..Thanks.

the amount of air you bring in, does not affect your calibration. This is why we have Mass Air Flow Meters.

The intake tract angle is what determines if you need a new calibration.

....I didnt say anything about the calibration. You said Headers wont effect incoming air. If I put the stock exhaust on my MAF reading Will be different which means incoming air has changed..

 

[Scott_0]

Seer I dont know what you do for a living nor I care honestly, but to look at you boast about your knowledge (which honestly does seem vast, or so it appears atleast to us here on the internet) I hope youre tuning cars or atleast working in the auto industry

 

[Witt]

the amount of air you bring in, does not affect your calibration. This is why we have Mass Air Flow Meters.

The intake tract angle is what determines if you need a new calibration.

Yes, angle and most importantly MAF sample size (maf housing diameter) if using a slot style MAF.

If the engine ingests less air because of a more restrictive exhaust system the MAF voltage feedback will be lower and the PCM will command less fueling.

2 situations that can change this are on alpha-n and speed density cars. Alpha-n for obvious reasons and speed density because volumetric efficiency has changed.

Headers will affect o2 transport delay but that, as Seer mentioned, is an adaptive value and it only affects closed loop. Pre-11s this has no bearing at WOT but 11s stay in closed loop almost all the time however o2 velocity is so quick at WOT transport delay has little to no bearing.

 

[Seer]

Seer I dont know what you do for a living nor I care honestly, but to look at you boast about your knowledge (which honestly does seem vast, or so it appears atleast to us here on the internet) I hope youre tuning cars or atleast working in the auto industry

I do not work in the auto tuning industry.

 

[Witt]

So if the Maf voltage changes than that obviously means headers effect incoming air..Thanks.

It was in response to what you and Seer were talking about...

I sent an Email to Mike directly, Told him I got headers and requested some dyno time. He brought me in on a slow day and dyno tuned my car...for free.

Thanks.

 

[Seer]

HUH?

I brought my car in. First pull was the email tune that Mike sent me. He then did a few more pulls while fine tuning the tune. The final pull when tuning was done was only a few HP different the the first pull.
I am saying that his email tune was pretty much spot on.

Then when tuning was done we loaded the Lund tune (i was standing the window of the car while he sat in the driver seat) and did another pull to see what my Cam tune made.



So if the Maf voltage changes than that obviously means headers effect incoming air..Thanks.



....I didnt say anything about the calibration. You said Headers wont effect incoming air. If I put the stock exhaust on my MAF reading Will be different which means incoming air has changed..

MAF voltage changes due to a pressure change, the headers themselves have ZERO impact on the metering of incoming airflow nor will they require a recalibration.

 

[Kingcrabb]

Yes, angle and most importantly MAF sample size (maf housing diameter) if using a slot style MAF.

If the engine ingests less air because of a more restrictive exhaust system the MAF voltage feedback will be lower and the PCM will command less fueling.

2 situations that can change this are on alpha-n and speed density cars. Alpha-n for obvious reasons and speed density because volumetric efficiency has changed.

Headers will affect o2 transport delay but that, as Seer mentioned, is an adaptive value and it only affects closed loop. Pre-11s this has no bearing at WOT but 11s stay in closed loop almost all the time however o2 velocity is so quick at WOT transport delay has little to no bearing.

I am familiar with how Maf and o2 readings work with the pcm.
Seer said that headers will not effect incoming air which it will effect maf reading which means incoming air has changed....which means headers will effect incoming air.

 

[stkjock]

I brought my car in. First pull was the email tune that Mike sent me. He then did a few more pulls while fine tuning the tune. The final pull when tuning was done was only a few HP different the the first pull.

yes, exactly what I said above.

so somewhere between 4-6 pulls were done before the "cammed tune" file was used.

So with that in mind, you see no reason why the final pull would show lower power numbers?