Where should I be shifting at?
Thread Starter
Racer
Joined: Oct 2001
Posts: 274
Likes: 0
From: Bradenton Fl
Where should I be shifting at?
When I ran at the drag strip I shift my auto by hand I do this because when it is drive it won't whine out the gears so when it shifts it drops out of the powerband ,so I usually shift at 5000 rpms but I was just looking at the dyno graph for the L98 and thouht maybe I was shifting to high, at what points of the powerband should I shift.
Melting Slicks
Joined: Oct 2000
Posts: 3,426
Likes: 4
From: Heidelberg PA
Cruise-In V Veteran
Re: Where should I be shifting at? (daddydahlin)
Being that I have a manual, it may not matter. But my power curve to shift is 4500rpm. Before the headers and intake - shift point was 4200 to 4300. :cheers:
Instructor
Joined: Jul 2001
Posts: 114
Likes: 0
From: Whittier CA
Re: Where should I be shifting at? (daddydahlin)
Let the trans do its job. If properly setup, it controls the shifts far better than manually shifting it. Problems can occur if the TV cable is not adjusted correctly.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Where should I be shifting at? (daddydahlin)
You may be shifting a little high; since you have a "dyno" available try some passes at different shift points, say 4,800, 5,000 and 5,200rpm. Compare trap speeds and go with the best results.
With my mods before the siamese base Drag2000 dragstrip simulator told me to shift at 5,000-5,200rpm; after the siamese base that raised to 5,400rpm.
So I think you may be good around 4,800-5,000rpm.
With my mods before the siamese base Drag2000 dragstrip simulator told me to shift at 5,000-5,200rpm; after the siamese base that raised to 5,400rpm.
So I think you may be good around 4,800-5,000rpm.
Thread Starter
Racer
Joined: Oct 2001
Posts: 274
Likes: 0
From: Bradenton Fl
Re: Where should I be shifting at? (65Z01)
Thanks everyone for your info. I start trying different shift points at the track. Also one more quick question is there any way to change the shift points of the transmission
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Where should I be shifting at? (daddydahlin)
You can get the B&M Governor Recalibration Kit, P/N 20248, from Summit for around $30. It comes with an assortment of springs and inner weights to change the WOT shift poits.
For convenience you can get a new stock governor, P/N 2420-2117, from your Chevy dealer for around $50.
For convenience you can get a new stock governor, P/N 2420-2117, from your Chevy dealer for around $50.
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