94 shift points
Thread Starter
Racer
Joined: Nov 2002
Posts: 420
Likes: 0
From: palm harbor fl
94 shift points
I just got tunercat and I wanted to change my shift mph,right now they are high. I'm running 3.54 gears and my current shifts are1-2 43 mph,2-3 78mph 3-4 133mph. Car won't shift at wot until I let off the gas, when I looked at the table 97%-100% in first was 43 and then it went down to 36 mph for the next three tps down to I think 75% tps.Should I move these down an equal amount or use the scaling feature for the whole column. any suggestions would really help, I want to go to the track next weekend. thanks
Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
First thing to do is tell us what ratio you had before so we have all the info, then you can scale all the old table values by the %.
If it was a 2.59:1 and you went to 3.54:1, youd go "2.59 divided by 3.54" which equals about 0.732. So you multiply all the transmission tables that relate to SPEED ONLY by that number, which will reduce them all down to a safe level.
Then you can work with them from there. The RPM thresholds have never ever been changed on my .bin, and i went from 2.59:1 up to 3.33:1, all i changed were the shift points and TCC lock/unlock points that are a TPS% Vs MPH arrangement.
Once you have the upper and lower points set for each gear, you can smooth out the tables, more so the downshift points, this will mean you dont have to nearly floor it to go from 2>1, and it will make the car abit smoother to drive.
Here is a screen shot of my shift points on my 94 with the 3.33:1,
If you want to email me your .bin file with the stock shift points on it, i can make the changes for you. I did some for Rtracy a couple months back.
How did you end up going with your 95 there Ray?? did you get it all sorted out mate?
If it was a 2.59:1 and you went to 3.54:1, youd go "2.59 divided by 3.54" which equals about 0.732. So you multiply all the transmission tables that relate to SPEED ONLY by that number, which will reduce them all down to a safe level.
Then you can work with them from there. The RPM thresholds have never ever been changed on my .bin, and i went from 2.59:1 up to 3.33:1, all i changed were the shift points and TCC lock/unlock points that are a TPS% Vs MPH arrangement.
Once you have the upper and lower points set for each gear, you can smooth out the tables, more so the downshift points, this will mean you dont have to nearly floor it to go from 2>1, and it will make the car abit smoother to drive.
Here is a screen shot of my shift points on my 94 with the 3.33:1,
If you want to email me your .bin file with the stock shift points on it, i can make the changes for you. I did some for Rtracy a couple months back.
How did you end up going with your 95 there Ray?? did you get it all sorted out mate?
Racer
Joined: Jan 2004
Posts: 458
Likes: 1
From: NY
Yep! It's alot different when you have a set of stickies and go to the track. You can get a good log without all that wheel spin on the street. I do notice the car surging a bit now at lower RPM's. Maybe due to the the change in lockup, I don't know. What do you think Case?
It was a good day at the track saturday although I popped a fuse for my water pump during a run and the temp rocketed to 260.
The car never shout down like I thought it would at 250. Turned out to be a bad relay.
Again, thanks for the help Case!
Oh, and in case you want to know I ran a 12.2 at 112MPH in the quarter. Not bad for a street car!
It was a good day at the track saturday although I popped a fuse for my water pump during a run and the temp rocketed to 260.
The car never shout down like I thought it would at 250. Turned out to be a bad relay.Again, thanks for the help Case!
Oh, and in case you want to know I ran a 12.2 at 112MPH in the quarter. Not bad for a street car!
Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Hey no worries Ray, anytime at all mate 
Did you make any changes to the main shift points i did for you a while back?
Im not sure what the surging thing would be, id really have to see that to know. Run Datamaster and send me the log if ya like, ill see if i can see anything i consider abnormal in that.
12.2 sounds like a pretty good time too mate, 112mph is a fair bit of grunt too!!
Did you make any changes to the main shift points i did for you a while back?
Im not sure what the surging thing would be, id really have to see that to know. Run Datamaster and send me the log if ya like, ill see if i can see anything i consider abnormal in that.
12.2 sounds like a pretty good time too mate, 112mph is a fair bit of grunt too!!
Racer
Joined: Jan 2004
Posts: 458
Likes: 1
From: NY
Hey no worries Ray, anytime at all mate
Did you make any changes to the main shift points i did for you a while back?
Im not sure what the surging thing would be, id really have to see that to know. Run Datamaster and send me the log if ya like, ill see if i can see anything i consider abnormal in that.
12.2 sounds like a pretty good time too mate, 112mph is a fair bit of grunt too!!
Did you make any changes to the main shift points i did for you a while back?
Im not sure what the surging thing would be, id really have to see that to know. Run Datamaster and send me the log if ya like, ill see if i can see anything i consider abnormal in that.
12.2 sounds like a pretty good time too mate, 112mph is a fair bit of grunt too!!
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Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Well Ray thats great in a way mate, cause i never actually changed those 93 or 100% upshift points, i thought id leave them alone cause i didnt really know what speeds youd get to in each gear, its very hard to tell cause almost every car is different once you change a few pieces.
Racer
Joined: Jan 2004
Posts: 458
Likes: 1
From: NY
Well Ray thats great in a way mate, cause i never actually changed those 93 or 100% upshift points, i thought id leave them alone cause i didnt really know what speeds youd get to in each gear, its very hard to tell cause almost every car is different once you change a few pieces.
Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Yeah i changed all of those i think, cause they were still set quite high. I changed a fair few of the downshift points to smooth it out, and a few of the upshifts to stop it shifting up too easily at part throttle (the stock numbers are really tame until somwhere around 85-90% throttle, and the result is hard to make it shift back without almost flooring it).
Here is a screenshot of your shiftpoints when i first made changes, the red ones are what i changed. I changed a couple of the 93 and 100% downshift points, but i left the 93 and 100% upshifts where they were (hope you can see it ok!!)
Here is a screenshot of your shiftpoints when i first made changes, the red ones are what i changed. I changed a couple of the 93 and 100% downshift points, but i left the 93 and 100% upshifts where they were (hope you can see it ok!!)
Last edited by Casethecorvetteman; May 10, 2007 at 09:49 AM.
