I just got my 1715 tuner yesterday and I did the reprograming but i programed the wrong tire size in i went off the BF goodrich website and they said they were 33.1 and i just went out to the truck with a yard stick and there 32 and a half do i just hook up the programer and go threw all the steps again or what??

John

 

If you want accurate speed and shift points, then I would.

 

OK talked to Anita at performance and she told me to switch it to stock then reprogram and switch the tire size.

John

 

je3169,

Be aware that the height numbers listed on a manufacturer's website are for a tire not under load. That means that the height measurement is for when the tire is off the car/truck.

The height of the tire when mounted on your truck will be less because of the weight of the truck causing the tire to compress a little (or a lot if you have low air pressure).

So a question for Mike would be: Do you use the tire size measurement for a tire under load?

 

OK i retuned it to stock and then reprogramed it and changed the tire size to 32.50 i would think that you would set it at the the tire size under load but now i am not sure. Mike if your out there drop me a line

Thanks John

 

Hi everyone,

RJ made an *excellent* and important point about taller tires in his response..........in many cases the installed tire height at rest is not going to be what the manufacturer states on the sidewall. Now the better 35" tires, for example, will actually measure within a tenth or two of an inch within their rated height when installed. But there are many tires, the Futura brand at Pep Boys is a great example, where a 35" tire may only be as short as 33" or 33.5" when installed!

And of course, that is going to affect speedometer calibration. Now there will be some tire growth at speed, but by and large what you want to enter is the actual *measured* height of the tire when installed on the vehicle, that is going to give you the most accurate speedometer calibration.

Now with some codes, when you plug the MT back in it will allow you to go directly back into the options menu so you can adjust tire size without doing anything else, while other codes you have to return to stock and then reflash the PCM, entering your measured height as you did. That varies from one computer code to the next, and the only way you know is by what the Micro Tuner says when you plug it back in......if it says "Go back to stock," then that's what you have to do, and then you reinstall it with your corrected tire height.

Bottom line is, it's an easy fix, and always manually measure while installed on the vehicle and with the vehicle on firm level ground any tire of 32" or taller, is our recommendation.

 

Thanks for the info Mike.

John

 

You're very welcome John, anytime!

 

Mike,

What do you mean by this in your post above.

"any tire of 32" or taller, is our recommendation."

Also, do you sell Borla exhaust systems? I am in the market for the tuner and exhaust and would like to buy from a single vendor.

Thanks for your time.

 

He ment if you have 32" tires or taller you need to measure them manually like with a yard stick. I know he sells Magnaflow not sure if he sells Borla

 

Hey je3169,

How did that microtuner wake up that 03 for ya?

 

Hi Rollwave,

As John mentioned in his response, what I meant was that we recommend manually measuring any aftermarket tire (meaning a tire that didn't come on the vehicle from the factory) of 32" or taller, due to the potential for them being shorter than advertised. This was in regard to entering a different tire size with the Micro Tuner to recalibrate the speedometer when you've had a change in tire size.

We don't carry Borla exhaust systems for several reasons, but what it really comes down to is this: while Borla is a good system, there is a better exhaust system available. Like you, I had for years been a fan of Borla, as they use good quality T304 stainless steel, have a million-mile warranty, and some of their systems years ago for Explorers & Rangers (engines with fewer than 8 cylinders) were, at that time, the best available. We loved them on several of our 4.0 V6 Fords, Explorers, Ranger, etc. in the early to mid-90's.

That has changed, in that today Magnaflow's cat-back systems are getting a better result, gaining more power and doing better in torque as well as being aircraft grade 304 S/S & backed by a Lifetime warranty. We spent 23 months testing virtually evry name brand cat-back exhaust system (and intake kit) for this platform, and Magnaflow was the only one that actually increased available torque at any throttle position, at any rpm. Just to give you an idea of comparing where Borla stands in the field so to speak, Borla was among the better exhaust systems we tested, for example, gaining 16-17 HP on a 5.4 F-150 compared to Magnaflow gaining 19-21.5 hp, and Flowmaster's 10-12 HP. Borla did better in terms of the torque available below 3000 rpm than Flowmaster, Gibson, etc., which is a classic weak point with most exhaust systems causing significant loss of torque below 3000 rpm, especially on part-throttle. So all in all, Borla is certainly a good system, better than most. It's just not the very best we found, that's all. Magnaflow gains a little bit more HP and does a bit better torque-wise as well, along with no tendency to drone.

We're a bit different here at Performance in that while we handle just about anything to improve the performance of these vehicles, we're not a place where you can get any brand of any part. We test as much as possible to determine just which performance parts are actually doing the best job in terms of power gained and/or actual performance improvement in each respective area (tuning, intake, exhaust, igniton, and so on.......), and focus on carrying what actually does the best job for each situation and vehicle application. We try to identify what will get the best actual result, if and when a clearly superior part or manufacturer actually exists, and that's what we carry, primarily.

The Borla systems for V8's are nice exhaust systems to be sure, and if you go that route you'll probably be happy with it, as it's certainly a better system than the typical Flowmaster, Gibson, etc. It's just that on V8 motors they can tend to drone a bit in these F-150's (something they don't do on vehicles with motors of less than 8 cylinders by and large), and you can get a better result power-wise without spending any more money with the Magnaflow system.

Please feel free to give us a call if you would like to go over any of this in more detail, etc., or if you'd like to perhaps explore doing a combo deal on the exhaust & Micro Tuner, etc., we'll be happy to help any way we can.

Thanks for your post,

 

Hey 03F15054FX4 it woke it up i am very happy with it well worth the money.