MUSTANGGT06

Went to the track yesterday and let my brother drive my 06 GT auto with the new 4.10 gears. I have not had too much success with the new gears and my brother who has alot more track experience wanted to try them out. I have always just left the car in drive with traction control and O/D off. My best times from 0-60 ft where around 2.2. My brother manuel shifted all the way thru 3rd and tacted it to the rev limiter. He was able to get 2.0 and 2/10th better ET's. He said if the Rev limiter was was raised even more that he could have gotten even better times. To make a long story short, I have a predator C&L street firm shift tune on it now and went in and changed the shift points to 6200 and raised the Rev limiter to 7000 (which is the highest it will allow). Does anyone think that is too much or am I ok.

Nuke

The stock rev limiter setting is 6250 RPM. Brenspeed reset mine to 6800 with their tunes but I brought it down to 6500. Although many claim that our engines can handle 6800 RPM, I'm not a track guy so I'm comfortable at 6500. 7000 RPM is too high for my comfort zone.

PHX8839

Mine is set to 6.75 K. I wouldnt go over that.

07 GT E UPP

IMO, just a wee bit too high.....Have mine set at 6600 with my Mods

Lifter583

According to Brent at Brenspeed, the optium shift point is 6300 on my manual. This is the point the car is running out of pull, and the best point where the next gear comes in. After running a dyno test, I can see my curve slightly drop off after 6300. But there is the view of higher RPMs in a gear allow a better setup going in to the next gear. Just have to run it and see where your times are the best. Mine works best at 6300. One guy I know shifts at 6500 then runs it in 3rd at 7000 rpm over the finish line..

MUSTANGGT06

I assume that the Rev Limiter does not come into play while the car is in drive and going thru the gears if the shift points are set at 6200 rpm and the rev limiter is at 7000 rpm. The only way I could go above 6200 rpm is if I am manuel shifting and run it up to 7000 rpm. Is this correct?

Lifter583

Either manual shifting or set your shift points by setting them manually on your tuner. The reason the limiter is set higher, when you are within 200 rpms of the limiter point the computer begins to shut things down, so when it hits the limiter it doesnt just slam off.

drbobvs

I would set the shift points to anywhere between 6250 and 6500 rpm. Rev limiter is fine at 6800.

kentompkins

JMS Tuning had set my shift points at 6,500 and I sqeaked all the way up to third (lost time). I would go lower by 100 and run again. Test & Tune nights are a great way to have fun and figure this out for your setup.

Stkjock

if your car is running a canned predator tune, order a tune from Doug @ Bama, his auto tunes are known to be great, then all u do is mash the gas