2005-2014 Mustangs Discussions on the latest S197 model Mustangs from Ford.

Tuning experts...lets talk.

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Old Jan 5, 2008 | 11:32 AM
  #11  
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Default RE: Tuning experts...lets talk.

Good posts guys...Next time I get to test my car Im going to get the fuel to 12.7 low and 13 high. Im close right now so im not too worried and My car will hardly be dirven for the next few weeks. After, Ill call up Brenspeed and see if they can guide me through any timing adjustments to gain some more power with the added fuel. Kinda a pain but I just wanna get it close before I can see a dyno...
Old Jan 5, 2008 | 12:39 PM
  #12  
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Default RE: Tuning experts...lets talk.

Just to add...I think im going to try a tune from Bama or VMP...Which one do you think I sould test the AFR on? Im leaning toward bamas race tune becuse theres a good deal on both tunes right now.
Old Jan 5, 2008 | 01:14 PM
  #13  
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Default RE: Tuning experts...lets talk.

hmm i also have brenspeed tunes, I noticed some pinging earlier this summer. . . i kind of ignored it and thought it was some dash rattle. Interesting


Old Jan 5, 2008 | 01:24 PM
  #14  
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Default RE: Tuning experts...lets talk.

Call bamma chips for a tune that will work with the mod's you've done to your car, doug is a great tuner and he will work with you till your happy with the tune.
Old Jan 5, 2008 | 02:19 PM
  #15  
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Default RE: Tuning experts...lets talk.

before we get too critical of mail order tunes, think of what you paid for. Most tunes are what, around $100? And even though they aren't spot on, they do offer a noticeable performance increase. Are they perfect? Heck no, nobody should argue they are. They are chosen out of a collection of data, gathered from hundreds, or thousands, of other similiar cars, depending on your choice of tuner. They do their best to get a tune with the best hp possible with the knowledge they have. Of course, they try to play it safe because they don't want to pay for a $5k engine over a $100 tune. There is always room to improve them on a dyno or with a wideband on the street, but they can't do that with $100. If you want a perfect tune, spend $200-$400 and get some dyno time. Will it be worth it? Maybe, maybe not. Depends on how close the original tune was. and no 2 cars are 100% identical. There are differences in so many ways. Manufacturing tolerances (in both car and aftermarket parts), fuel (what kind, where you bought it, when the gas station last refilled it's tanks), etc.
Most reputable tuners will work with you to get your tune better. That doesn't necessarily mean they will send you 100 new tunes until it's perfect, but they might. The MMR cai is not real popular. There's probably less cars that Brenspeed has tuned with it, hence the large variance. But what they learned from yours they will apply to the next car, and so on, and so on.
Old Jan 5, 2008 | 02:36 PM
  #16  
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Default RE: Tuning experts...lets talk.

ORIGINAL: bodyman

Call bamma chips for a tune that will work with the mod's you've done to your car, doug is a great tuner and he will work with you till your happy with the tune.
why would i do that? I like Brenspeed, they have just as good as customer support as doug, if not better. Doug's tunes aren't necessarily better than brenspeed's, in fact i think brent over at brenspeed has much more experience than doug in the area of mustang tuning but that's just my opinion.

I'll stick with Brenspeed for now.
Old Jan 5, 2008 | 03:30 PM
  #17  
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Default RE: Tuning experts...lets talk.

ORIGINAL: Stage4

before we get too critical of mail order tunes, think of what you paid for. Most tunes are what, around $100? And even though they aren't spot on, they do offer a noticeable performance increase. Are they perfect? Heck no, nobody should argue they are. They are chosen out of a collection of data, gathered from hundreds, or thousands, of other similiar cars, depending on your choice of tuner. They do their best to get a tune with the best hp possible with the knowledge they have. Of course, they try to play it safe because they don't want to pay for a $5k engine over a $100 tune. There is always room to improve them on a dyno or with a wideband on the street, but they can't do that with $100. If you want a perfect tune, spend $200-$400 and get some dyno time. Will it be worth it? Maybe, maybe not. Depends on how close the original tune was. and no 2 cars are 100% identical. There are differences in so many ways. Manufacturing tolerances (in both car and aftermarket parts), fuel (what kind, where you bought it, when the gas station last refilled it's tanks), etc.
Most reputable tuners will work with you to get your tune better. That doesn't necessarily mean they will send you 100 new tunes until it's perfect, but they might. The MMR cai is not real popular. There's probably less cars that Brenspeed has tuned with it, hence the large variance. But what they learned from yours they will apply to the next car, and so on, and so on.
Thats not what is really being said here. We all know the mail order tunes are not perfect, they are just close. But how close is close? I don't think a 15.1 AFR is acceptable. Now if my readings came out in the 13s then I would be fine with it. The goal is around 12.7-13.1...Im running about 13.1 (14%richer) and itsprobably still 2-4% lean. Im not saying the car doesn't run strong because she is flying now that I fixed the AFR.

Once I get brents new tune I will richen it up a little more and fine tune the AFR to my linkings. The timing seems to be ok. The car is pulling nice through 4th gear now.

After I get the AFR sorted out it still wont be perfect...but then and only then I would say its "close" Now, how is everyone else here going to know how their car is running? The don't.

By the way...the scary part is that I never hear and knock or ping...even at 15.1....?
Old Jan 5, 2008 | 05:01 PM
  #18  
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Default RE: Tuning experts...lets talk.

Here's a copy of my Brenspeed dynosheet with the A/F ratio.




[IMG]local://upfiles/33124/3EE60968A3DF4651984ECF107C472780.jpg[/IMG]
Old Jan 5, 2008 | 05:17 PM
  #19  
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Default RE: Tuning experts...lets talk.

ORIGINAL: Black GT

Here's a copy of my Brenspeed dynosheet with the A/F ratio.




[IMG]local://upfiles/33124/3EE60968A3DF4651984ECF107C472780.jpg[/IMG]
I guess Brenspeed tunes a little lean then. They told me on the phone that 13s and even up to 14 is ok. That dyno shows it runnin around 13.5. If factory is 12.7(V6), im guessin that 13.5 is fine since the factoy is rich.

The best thing I can see doing w/o a dyno tune is to get a wideband, tune the AFR the best you can, and floor it in 3rd gear to check power/timing. A little experimentingand it should be close.
Old Jan 5, 2008 | 05:26 PM
  #20  
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Default RE: Tuning experts...lets talk.

ORIGINAL: NickSezz

I guess Brenspeed tunes a little lean then. They told me on the phone that 13s and even up to 14 is ok. That dyno shows it runnin around 13.5. If factory is 12.7(V6), im guessin that 13.5 is fine since the factoy is rich.

The best thing I can see doing w/o a dyno tune is to get a wideband, tune the AFR the best you can, and floor it in 3rd gear to check power/timing. A little experimentingand it should be close.
I don't know what the optimal A/F ratio should be. I took it to Brenspeed to have the A/F ratio checked because I had it at another shop on a Mustang dyno and they said it was running way too rich (10.7 - 12.5). Brent checked it on his Dynojet and said it was fine.

The other shop also had my max at 301.5 rwhp and 309.8 rwtq. Although the car temperature was cooler and I understand Mustang and Dynojets give different readings.



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