MPT Tune Officially out

[BMachine]

So i guess im the only one that there 0-60 increased? I had unleashed tunning 93 performance and i always got 5.3 and my best was 5.0. But after installing mpt 93 prx my time becam always 6.5 and above 6. But i love the way mpt feels and it is better then unleashed but its not making sense for me why my 0-60 went up?

Are you using 93 octane gas along with the prx tune, also road conditions matter, are you doing the 0-60 in the same location as the previous tests, the incline/decline of a road affects time. a tune shouldn't be increasing your 0-60 runs, 6.5 is what I ran stock with no mods.

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[seifrefai]

Its same conditionsnand yes same 93 octane i didnt change anything

 

[fordguys550]

Did they change your tire size on the tune? That will throw it off

 

[fordguys550]

Make sure your tire size selection is on stock value, unless of course its not

 

[seifrefai]

I told them the tire size is 275/r19 since i changed my tires to 19 inch

 

[seifrefai]

With unleashed he didnt even ask me or do anything but give me a tune. So maybe because the tire its giving wrong times?

 

[X0AYHAM0X]

Tbh I dunno how you guys are getting times under 6.0
The best I done is 6.1
I have Roush CAI and an x-pipe, what can I add to get 5+???

 

[mustangv6magn]

I am guessing mine will be affected cause of my 20 in. wheels

 

[seifrefai]

But i had the same setup of wheels and tires and everything and managed to always hit 5.3 or 5.4 with ease with the unleased tune. But i didnt enjoy the tune as much as i enjoy mpt tbh

 

[fordguys550]

Yes, but you see, if they change the size of the tire on the tune(vs the old one) your times will be different....the computer uses a preset tire size to estimate your 0 to 6p and other tests...for example, if your new tire size is shorter than your stock tires, but the tune wasnt changed to compensate, your actually hitting like 55mph where the ecu thinks your hitting 60...and since it takes less time to hit 55, your times apear lower than they should be. If your tires are taller than stock, and you dont change the tune, it will actually tell you it took longer than it really did...since you went 65mph...but the ecu thinks you went 60. So the real question, are your tires the same size as stock? Not talking about wheel size here, that has nothing to do with it....just your tire diameter. They may have input the wrong diameter for you. Double check your size online with the size in your tune. You can see that in the start up when you go to download your tune. Its a adjustable option

 

[fordguys550]

You have 275s on 19s....but whats the sidewall? Thats the impartant number here

 

[seifrefai]

This is the exact setup 275/40/R19 and thats what i gave mpt. But i guessbur right since unleashed didnt change anything in the tune when i put the tire and my cai. When i told him dont u have to update my tune. He always answers back in 3 words and he said its fine. Thats some bullshit compared to mpt honestly

 

[fordguys550]

Your tires around about 27.7" tall. About .75" taller than stock. Double check the tire size on your x4

 

[jojojohnny]

Fordguys550 knows his stuff. I leaned on his advice a lot when considering Mods.. So what he said again.... Tire size is huge and often overlooked..

 

[seifrefai]

Okay so do i just tune the car back to stock then tune it back to the mpt tune with the adjusted tire? Or just retune without going back to stock?

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