ZO6Ted

Want to go to the track Sunday if I can fix this. How do I get rid of the flat spot on the 1-2 shift. I increased the shift rpm to 5800 from 5600. Increased shift mph from 31 to 32. Rev limiter set at 6k. Feels like its same as before at the track like a 1/2 second it just dies at the top of 1st. Same RPM at 2-3 gear does just fine. Help

03sierraslt

iTrader: (22)

I forget the name of the setting, I'll have to try to look.

ZO6Ted

Thanks Pat I appreciate it sir!

FFDP

iTrader: (2)

Hmm, I don't have this issue on my 2012 with the same transmission.

It just goes right into 2nd and keeps on going with no delay that I've noticed. I still have TM active so timing drops for all of like .3 to .5 seconds. I've changed shift speed and oncoming pressures and line pressure by a small amount.

ZO6Ted

Yeah it did it with the stock tune and the Whipple tune and it still is. Only thing from bone stock to begin with is 18" tires instead of 17s.

ZO6Ted

I understand the 6 speeds are different. Would it help if I upped the shift mph?

03sierraslt

iTrader: (22)

My understanding is that it's on the engine side, I can't seem to find it. I found the solution before and saved the info but can't find it now.

ZO6Ted

Ill go look around thanks

ZO6Ted

Just not finding anything. Should I try raising the shift mph?

bigsapper

iTrader: (2)

I read something recently that changing the throttle boost (?) exacerbates the 1-2 shift issue.

I know on a completely stock tune, just using E85 causes this to be really bad.