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It would seem that at least two people on this board, myself and nino, would like to know the best place to adjust, if any, the shift points... or at least a good place to start from.
From the "Do shift points really exist" thread...
<blockquote>quote:</font><hr>Originally posted by nino:
my problem is i need to know how to adjust my shift points. i let them alone, but i am sure if i was to adjust them for the better, my ETs would improve. every shift has so many options i have no idea where to start. +/- 4 +/- 6 +/- 12 man i am so lost
<hr></blockquote>
<blockquote>quote:</font><hr>Originally posted by HAZ-Matt:
To add to this...
What is the mph that a the computer is supposed to shift for each gear in 3.42 geared cars?
How high can we safely rev on the stock valvetrain?
<hr></blockquote>
The rev limiter and the shift points go hand in hand. I think... but am not completely sure, that the transmission is set to shift at whatever mph that produces 5900 rpm in that gear. The rev limiter is set to 6000 rpm from the factory. Hypertech recommends setting the shift points so that they occur 100 rpm below the rev limiter.
The HPP3 installation instructiosn have a table with the common rear end gear ratio and the mph/rpm ratio. The values they have given are:
1-2 1 mph = 137 rpm
2-3 1 mph = 73 rpm
3-4 1 mph = 45 rpm
Assuming that the transmission shifts at 5900rpm, that would mean that the mph it is set for would be ~43.1 mph for the 1-2 shift, ~80.8 mph for the 2-3 shift, and interestingly enough, it would mean that the 3-4 shift would occur at ~131 mph. Is thrid gear even good till 131? I've never been past 100, so I haven't payed attention to how many revs are left in 3rd gear, if any, when it reaches the limiter.
The only shift point that I had remebered reading on this board is the 2-3 occuring at 78mph on stock cars, however I don't know if that was correct. If so that means the shift is actually occuring at ~5694rpm.
So... can anyone shed some light on this subject?
EDIT: I changed the name of this thread because I need a favor. If someone with autotap could find out where the car actually shifts with 3.42's, I'd appreciate it.
[ January 17, 2003: Message edited by: HAZ-Matt ]</p>
From the "Do shift points really exist" thread...
<blockquote>quote:</font><hr>Originally posted by nino:
my problem is i need to know how to adjust my shift points. i let them alone, but i am sure if i was to adjust them for the better, my ETs would improve. every shift has so many options i have no idea where to start. +/- 4 +/- 6 +/- 12 man i am so lost
<hr></blockquote><blockquote>quote:</font><hr>Originally posted by HAZ-Matt:
To add to this...
What is the mph that a the computer is supposed to shift for each gear in 3.42 geared cars?
How high can we safely rev on the stock valvetrain?
<hr></blockquote>
The rev limiter and the shift points go hand in hand. I think... but am not completely sure, that the transmission is set to shift at whatever mph that produces 5900 rpm in that gear. The rev limiter is set to 6000 rpm from the factory. Hypertech recommends setting the shift points so that they occur 100 rpm below the rev limiter.
The HPP3 installation instructiosn have a table with the common rear end gear ratio and the mph/rpm ratio. The values they have given are:
1-2 1 mph = 137 rpm
2-3 1 mph = 73 rpm
3-4 1 mph = 45 rpm
Assuming that the transmission shifts at 5900rpm, that would mean that the mph it is set for would be ~43.1 mph for the 1-2 shift, ~80.8 mph for the 2-3 shift, and interestingly enough, it would mean that the 3-4 shift would occur at ~131 mph. Is thrid gear even good till 131? I've never been past 100, so I haven't payed attention to how many revs are left in 3rd gear, if any, when it reaches the limiter.
The only shift point that I had remebered reading on this board is the 2-3 occuring at 78mph on stock cars, however I don't know if that was correct. If so that means the shift is actually occuring at ~5694rpm.
So... can anyone shed some light on this subject?
EDIT: I changed the name of this thread because I need a favor. If someone with autotap could find out where the car actually shifts with 3.42's, I'd appreciate it.
[ January 17, 2003: Message edited by: HAZ-Matt ]</p>
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