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2011 GT500 Pulley & Tune upgrade 545RWHP/534RWTQ

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#1 OFFLINE   Justin00Stang


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Posted 20 September 2010 - 08:44 AM

A local guy brought his 2011 GT500 over with 1500 miles for a pulley swap and dynotune. I tuned the car first, to see how the 11s responded. We saw a nice gain of 36RWHP and 28RWTQ. Most 10s-11s will see 20-40RWHP gain from tuning, the gains aren't as large as the 07-09s. This is due to 10-11 having knock sensors which allows a more aggressive tune from the factory.

We swapped the pulley on later in the afternoon when it was getting warmer, we saw a 3-4psi increase throughout the curve and a peak TQ gain of 42RWTQ and a peak HP gain of 25RWHP. Had the conditions not gotten worse the peak HP gain would have been better. You can also see that the car is now starving for air up top, with a peak HP gain from the pulley swap of around 30-40RWHP in the 5000RPM range, it tappers off up top due to the need for a larger throttle body. We would get 10-20RWHP from a TB swap on this car.

Overall we saw a 61RWHP and 70RWTQ gain from a pulley swap and custom tune. I sell this 2010-2011 upgrade package on my website:

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Stock look 2.59" pulley:
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Larger 90mm replacement idler installed below IC tubes to take up slack and improve wrap.

The 2010-2011 fusebox has the IC relay and fuse built in, the rear most little relay is for the IC pump, you can install a jumper wire diagonal in it to run the IC pump while the car is on the dyno:
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Since you are only making quick WOT hits on the dyno, the IC system really never has a chance to fully circulate and cool. Also since the car is not moving the only airflow is provided by a fan. Jumping the IC pump and sitting a fan in the front of the car helps to keep temps stabil and prevents major heat soak from run to run.
Justin Starkey Justin@VMPTuning.com VMP Tuning- GT500 Specialists

2007 Shelby GT500 Red/Silver
Highest HP with 2.3L TVS816RWHP/779RWTQ

Mods: VMP 2.3L TVS Supercharger, VMP Dyno-Tune, VMP 2.5" Upper, VMP 72MM TB & Elbow, 123MM MAF, IW 10% OD balancer, 80s, Dynatech 1 7/8" LTs, Comp Stage 2 cams.

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#2 OFFLINE   GT500Tow


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Posted 20 September 2010 - 04:38 PM

Hey Justin. Can you tune my car this week ? I guess Sam said he doesn't have a file for this 72 MM T/Body. PM me if you will please. Oh and nice numbers.
1999 ford Lightning 575HP 11.80's [White]
2004 mustang mach 1 Sons car, has 500hp Pro charged, built engine.[White]
2007 Ford GT500, White/blue stripes.
Moser M9 9 inch rear with coilover shocks. All custom built LCA's, UCA, Panhard bar. 3.89 gears DTT. Auto turbo 400 trans is next. Complete custom Leather interior. Lots of billet, complete custom stereo system.
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#3 OFFLINE   68fastback


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Posted 20 September 2010 - 06:42 PM

...nice 5 page article starting on pg 126 in the November MM&FF on the L&M TBs ...on the FRPP SC kit (2.9 WHipple?) they tested the LM66 added 26 over the CJ65 and the LM72 added 29.

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