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post #1 of 14 (permalink) Old 05-09-2014, 09:24 PM Thread Starter
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what are you shifting at

im currently shifting at 5100. I have the j mod and mark VIII TC. I want to go higher, what would be a nice shifting point.

and what about you guys what mods do you have and were are you shifting?

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post #2 of 14 (permalink) Old 05-09-2014, 09:44 PM
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You need to datalog to find your optimal shift points.

Log acceleration. Shift so acceleration before the shift is as close to acceleration after the shift as possible.

-Brandon
97 Laser Red Thunderbird LX 162k, Stage 2 4.6L 2v N/A | 300 BHP (255 RWHP, 290 RWTQ) | 13.95 @ 97.58 | Build details | Pics at the Lorain Assembly plant
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post #3 of 14 (permalink) Old 05-10-2014, 02:55 PM
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Quote:
Originally Posted by swampt420 View Post
im currently shifting at 5100. I have the j mod and mark VIII TC. I want to go higher, what would be a nice shifting point.

and what about you guys what mods do you have and were are you shifting?
Wherever I want! Man I love having a modern manual. Lol



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post #4 of 14 (permalink) Old 05-10-2014, 03:40 PM
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Quote:
Originally Posted by theterminator93 View Post
You need to datalog to find your optimal shift points.

Log acceleration. Shift so acceleration before the shift is as close to acceleration after the shift as possible.
+1

There is no one-size-fits-all shift schedule except for the OEM schedule on a stock or basically stock car. YMMV

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post #5 of 14 (permalink) Old 05-10-2014, 07:26 PM
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Quote:
Originally Posted by Black_Cat View Post
Wherever I want! Man I love having a modern manual. Lol
^thats what I want!!

You can see mods in my sig and I shift right at 5600. I will datalog once I get my hands on an xcal. We don't have a write up on dataloging do we? I've watched a couple youtube vids on it but that's about it.

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post #6 of 14 (permalink) Old 05-10-2014, 07:36 PM
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There are write ups, but the good ones are all for-paid info for tuners.

Besides... my auto shifts exactly when I want it to, and faster than any manual.

-Brandon
97 Laser Red Thunderbird LX 162k, Stage 2 4.6L 2v N/A | 300 BHP (255 RWHP, 290 RWTQ) | 13.95 @ 97.58 | Build details | Pics at the Lorain Assembly plant
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post #7 of 14 (permalink) Old 05-10-2014, 07:48 PM
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GM has a sticky in the "EEC Tuning" section on datalogging with the Xcal2. I don't know how/if it differs from the Xcal3 though.
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post #8 of 14 (permalink) Old 05-10-2014, 10:03 PM
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You obviously haven't seen me shift lol.



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post #9 of 14 (permalink) Old 05-11-2014, 04:43 PM
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My heap has a Bauminator transmission controller.
It's the second best thing I brought for my cougar.
First were the TFS heads.
Open the laptop and input the rpm's I want to shift at.
By the way at present time it's 5900.

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post #10 of 14 (permalink) Old 05-12-2014, 09:43 AM
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What rear gear are you running?

The best way to find the optimum shift points is to try different ones at the track. You can study dyno sheets all day, but the timeslip is the proof.

Al

97 T-Bird LX 4.6 - 80k miles
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post #11 of 14 (permalink) Old 05-12-2014, 10:20 AM
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Originally Posted by T6Rocket View Post
What rear gear are you running?

The best way to find the optimum shift points is to try different ones at the track. You can study dyno sheets all day, but the timeslip is the proof.

Al
You can mess around with trial and error for hours on end and get close eventually... but the quickest, most effective way is to just look at the acceleration log.

-Brandon
97 Laser Red Thunderbird LX 162k, Stage 2 4.6L 2v N/A | 300 BHP (255 RWHP, 290 RWTQ) | 13.95 @ 97.58 | Build details | Pics at the Lorain Assembly plant
98 Black Mark VIII 160k, stock daily driver
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Gone but not forgotten: 96 Mark VIII, 94 Cougar XR7, 93 Mark VIII

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post #12 of 14 (permalink) Old 05-12-2014, 11:33 AM
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3.73 gears.
The only sheet that counts is the dyno sheet.
Shift at peak rpm.
With the trans. controller human shifting error is removed.

I have run 4.56, 4.10 and 4.88.
all those gears were too much for the HP the engine was making.

A new intake (TFS), new headers and new cams are coming.
Then pay the dyno guy to dial it in.

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post #13 of 14 (permalink) Old 05-12-2014, 03:01 PM
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Quote:
Originally Posted by theterminator93 View Post
You can mess around with trial and error for hours on end and get close eventually... but the quickest, most effective way is to just look at the acceleration log.
Sure, always look at the dyno sheet if you have one. 3-4 passes would get it done, shift points are not rocket science, unless the combo is totally new to you.

Al

97 T-Bird LX 4.6 - 80k miles
94 Supra TT Auto - street/strip car
04 CVPI- Brenda's car - 76k miles
Previous Fords:
95 T-Bird LX 4.6 - fully optioned, owned 15 years, 220k miles
96 Cougar XR-7 4.6- Brenda's car, owned 11 years, 187k miles
88 T-Bird 3.8 - first T-Bird, owned 5 years, 206k miles
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post #14 of 14 (permalink) Old 05-13-2014, 06:05 PM
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Quote:
Originally Posted by swampt420 View Post
and what about you guys what mods do you have and were are you shifting?
It'll vary a little from run to run, but ~6875-6950 for both the 1-2 and 2-3 per the datalogs. Mods in garage (link in sig below).

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