TT Shift Point
Thread Starter
Instructor
Joined: Mar 2003
Posts: 239
Likes: 0
From: Colorado Springs CO
TT Shift Point
I know there is another thread on this subject, but I can't open it for some reason.
On a Twin Turb, the TQ and HP curves cross at about 5500rpm (hp going up and TQ going down). Is that the optimal shift point?
Thanks for the discussion.
On a Twin Turb, the TQ and HP curves cross at about 5500rpm (hp going up and TQ going down). Is that the optimal shift point?
Thanks for the discussion.
Instructor
Joined: Aug 2003
Posts: 104
Likes: 6
From: Sydney NSW
Re: TT Shift Point (RoadRebel)
no thats not your optimal shift point, optimal shift point is when there is more torque in the next gear than the point your are at. To find it you need to look at a dyno sheet and gear ratios.
All dyno graphs will cross at that point (assuming the right measurements and equal scale is used) as HP = TQ X RPM / 5xxx (cant remember the number but its the point where they cross)
All dyno graphs will cross at that point (assuming the right measurements and equal scale is used) as HP = TQ X RPM / 5xxx (cant remember the number but its the point where they cross)
Advanced
Joined: Apr 2004
Posts: 82
Likes: 0
From: Savannah GA
Re: TT Shift Point (CussCuss)
According to a recent article in Chevy High Performance, the optimal shift point is where the HP or RWTq in your current gear equals the HP or RWTq in the next gear. On the charts in the article, they pointed out that the rear wheel torque and hp cross points are the same. It's in the July issue, I think, if your interested. There's also an interesting article about different intake manifolds on the LS1.
Good luck.
Good luck.
