SCT tune now available for 2011 5.0L!

FastRedPonyCar · Aug 30, 2010

Dont' forget that if you dyno in 4th gear instead of 5th, you'll see an extra 10 or so HP to the wheels.

Companies are hyping their numbers because they're testing in 4th gear. Other companies with "lower numbers" are PROPERLY testing in 5th.

The fact of the matter is, you're not getting an accurate reading unless you test in 5th gear which is the 1:1 ratio

http://media.ford.com/images/10031/2011_Mustang_GT_Specs.pdf

To be perfectly honest, I wouldn't buy a tune from a company that didn't have the balls or honesty to advertise their gains at the proper 1:1 ratio. It's dishonest, mis leading and not fair because it makes the tunes done by the guys that did things right look inferior.

I don't know of any companies advertising numbers they've gotten from an automatic transmission so that's not a valid excuse.

LRSjmac · Aug 30, 2010

FastRedPonyCar said:
Dont' forget that if you dyno in 4th gear instead of 5th, you'll see an extra 10 or so HP to the wheels.

Companies are hyping their numbers because they're testing in 4th gear. Other companies with "lower numbers" are PROPERLY testing in 5th.

The fact of the matter is, you're not getting an accurate reading unless you test in 5th gear which is the 1:1 ratio

http://media.ford.com/images/10031/2011_Mustang_GT_Specs.pdf

To be perfectly honest, I wouldn't buy a tune from a company that didn't have the balls or honesty to advertise their gains at the proper 1:1 ratio. It's dishonest, mis leading and not fair because it makes the tunes done by the guys that did things right look inferior.

I don't know of any companies advertising numbers they've gotten from an automatic transmission so that's not a valid excuse.

Thanks for pointing that out. That was a variable I hadn't thought about & it caused me to do some searching. See below a post from Steeda on another forum.

We have some numbers now we are ready to release. But first a little background.

In 5th gear this car dyno'd at 368hp but would hit the speed limiter before the rev limiter due to our car being a 3.31 gear equipped car. In 4th gear the car dyno'd at 336hp at the wheels.

We decided to work with the car in 4th gear. As I mentioned earlier in this thread this will produce lower numbers all around, from the baseline number to the final number so they should not be used to compare against other cars.

As mentioned earlier a car with 3.73's will also dyno slightly differently in both 4th and 5th gears. Add on top of that the fact not every dyno reads the same, different days with different weather conditions produce different results, etc and it becomes nearly impossible to make accurate apples to apples comparisons.

That is why discussions on power numbers can become so heated. With questions whether one company or even an enthusiasts dyno number is accurate, what it really means, will it affect performance?... etc... etc...

In addition, with the speed limiter removed and rev limiter increased wheel speeds in 5th were going 170+. As unlikely as it was that a tire would blow out from that wheel speed we decided safety first and did our testing in 4th to keep the wheel speeds safe.

The attached dyno sheet is from pulls done on the same day, on the same dyno, on the same car, all in 4th gear on a manual transmission 2011 5.0 with 3.31 gears. This is the culmunation of over 8 months worth or work both here and with Ford right in Dearborn on pre-production cars. The numbers shown are the result of the cold air and custom tuning. Like our 05-2010 Cold air kits a custom tune/cold air package will be required for these gains.

Peak gains are 44.04 horsepower and 52.84 ft/lbs of torque, with even higher point to point gains. The highlighted point at 5500 shows a gain of 59.83 horsepower and 59.19 ft.lbs of torque. These gains are on 93 octane fuel. The baseline number was on a completely stock car with 87 octane fuel as delivered from Ford.

SCT tune now available for 2011 5.0L!

FastRedPonyCar

LRSjmac

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