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KR Performance Tune


shelbypt
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I want to keep my KR as stock as possible, but feel a tune may wake it up even more. With my 07 GT500, I installed the JLT CAI with a tune and it woke up big time. Has anyone had a tune done that adds horsepower, but does not cause engine lights to come on? Also, anyone who's done any performance add ons that work, feel free to chime in.

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Keep in mind, there is already a performance tune on it from Shelby to allow for the increased airflow from the CAI and hood...could it be more agressively tuned without leaning out? Good question! I am also interested in any other performance mods that have been done.

Edited by txcobra
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On a more serious note. Suppose you try a different tune but decide to return to the original tune that was installed at SAI, how will that work?

 

I would "assume" it would work like any other tune. If you reprogram the computer with a new tune, you'll need a hand held programmer. The tune that's currently in your car will go into the tuner and get stored, while the new tune goes and gets loaded int the car's computer.

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So far so good with the suggestions, please keep them coming. I was not aware of a performance tune from SAI, I will look further into that. The blower may be a good option a few years down the road. Oh, and by the way FIA, I'll see you on Nicholls road when you get that awesome KR. I have the carbon fiber rearviews which you know are more aerodynamic. I have the advantage :-) Plus I'll wax the underside of my KR....

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Thanks Crazyhorse. I have also read that KR's are getting about 509 RWHP (or 580-590) at the crank so if that's true, I am wondering how they are getting that without a very aggressive tune. Other than the CAI and exhaust, there isn't anything else different from a standard GT500 which is hitting the dynos at around 430-450 RWHP. Thoughts?

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The TVS is Ford Racing Performances supercharger upgrade. It will bring the Shelby GT500 crank horsepower over 600. It costs about $5,600.

So has any of the KR owners dynoed their car? These KRs feel like they are pushing more power than the 540!

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Good Job txcobra! That makes since. My 07 GT500 had the 373 gears too with the JLT cai and tune and there is still a difference with the KR. My KR is breaking loose too easily. I took a corner leading to the interstate, like I've always done in the GT500, but the KR broke loose and went about 70deg sideways. In my mind, I was thinking OH SHET, you can't wreck this car. So, since then I have been taking it really easy and re-leanring how to drive. it.

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Every KR dyno pull I have seen, both in magazines and at Tasca, have shown 507-515 at the wheels. Figuring the 20% rule that means more than 540 at the crank for sure. The 2010 GT 500, even though rated the same, only seems to be getting 480rwhp. That's why I suggested porting the stock blower instead of swapping to a TVS. Seems like it would be about the same gain for alot less money. Of course, if the TVS is under rated as well, that's different.

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