Thats pretty impressive if your getting that type of mileage. The sticker on an auto only shows 24 and thats about what I am getting around 70. Are you going downhill or did you have a huge tailwind? Also what are your RPM's at 70?

 

I have not seen any updates on guys with the auto so I'll give feedback on mine. As of now the tranny is really close to scratching 2nd and 3rd. It breaks totally free anytime it downshifts to 1st and comes close going down to 2nd
Of course anytime being at WOT. We are still working on getting a few more MPH before the up shifts. I'm sure that will come as we get all the up shifts to hit hard. Anyone know at what RPM we should be shifting this motor to maximize acceleration, other than just prior to the rev limiter?

 

Nice info. I may be getting mine tuned on Wednesday.

Whose tune do you have and how many miles on your odo?

 

I'm using trifecta performance up in Washington. This is the "Beta" tune for his company so he cut me a huge break. It is all done via email and data logs so it is taking a little longer than normal. The engine tune is already done, overall nice and noticeable improvement. Hopefully we get the tranny done this week, although he said it is a little more tricky than the vet.

 

Yep, they do decent work for sure. Keep us posted!

 

Descent as in you would not use them?

 

I definitely would if I didn't have a guy local to me that I have tun all my vehicles. The guys are Trifecta should treat you right.

 

How do I tune my mind? My wife's dying to know

 

Start with putting on the vinyl version of Pink Floyd's Dark Side of the Moon and firing up a banana peel.

Wiseass.

 

My thoughts exactly

 

That'll work ;}-"

LOL

 

Okay, guys. I am working with Vector Motorsports who is local to me on a tune for the L99 cars. We are not done developing the tune yet, but what I can tell you is that there is a LOT of room for improvement with the 6L80E.

I just drove around after having the trans cal done and there is a noticeable difference. It gets out of the hole much faster...almost feels like we did a rear gear swap. The shifts are much more solid both in auto and manual mode and it tachs up more before the upshift. Overall, there is some decent performance increase and much more fun.

We are not done with that or the performance tune. I will be bringing the car back next week for them to work with it a bit more. I'll post more on it as it develops.

 

I'm telling you, this auto setup is going to be hard to beat

 

We are still working on my tranny tune. We are going to try and add some more line pressure in hopes of throwing back in some torque management. I know I said add some torque management As of now the car barks the first two shifts with no TM. I'm hoping to accomplish this with more pressure and a little TM for longevity purposes. Just remember on the L99 the first to second shift happens early at around 5700-5800. To fix this you have to set the up shift MPH to 30 or 31. Changing the RPM alone will not do it. The car is making crazy power right now and I'm at 4100ft. Can't wait to try it at a lower elevation.

 

Are you able to scratch the tires yet during shifts?