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Positive Pressure vs. Temperature

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Old Sep 21, 2002 | 10:02 AM
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Default Positive Pressure vs. Temperature

New to LS1 Edit. I was playing around with my transmission settings. I'm trying to get it to shift harder. I adjusted my Positive pressure vs. Temperature to -95 for the whole chart, to actually feel a firm shift. Four questions:

1. Did I go about this the correct way?

2. Will this hurt my transmission?

3. How does this Positive Pressure vs. Temperature work?

4. What value am I changing with the -95?
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Old Sep 21, 2002 | 11:10 AM
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Default Re: Positive Pressure vs. Temperature

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by CorsicaLT1:
<strong>New to LS1 Edit. I was playing around with my transmission settings. I'm trying to get it to shift harder. I adjusted my Positive pressure vs. Temperature to -95 for the whole chart, to actually feel a firm shift. Four questions:

1. Did I go about this the correct way?

2. Will this hurt my transmission?

3. How does this Positive Pressure vs.
Temperature work?

4. What value am I changing with the -95?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">In the LS1 Edit manual they have a pretty good example of how to stiffen the shift points in the Positive Pressure vs. Temperature table. 0 would be the stiffest point on this chart.

I would like to know if changing the “90” on the maximum pressure to say 95, which would stiffen the “0” in the Positive Pressure vs. Temperature table?
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Old Sep 21, 2002 | 03:45 PM
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Default Re: Positive Pressure vs. Temperature

I changed it to -95 so I wouldn't have 0 for my wot. Anyone have any answers to any of my other questions?
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Old Sep 21, 2002 | 07:26 PM
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Default Re: Positive Pressure vs. Temperature

I would like to know if changing the “90” on the maximum pressure to say 95, which would stiffen the “0” in the Positive Pressure vs. Temperature table?

(Good question, I'd like to know also.)
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Old Sep 22, 2002 | 07:09 PM
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Default Re: Positive Pressure vs. Temperature

Holy cow, you made everything 90? <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />
So instead of ~800 MA at 24% TPS, you have 90??

I hope you're not looking for real high mileage from your tranny.

If you made your Base Pressure versus torque 90, maybe you'll be ok. I raised my table about 33%, leaving 90 as a maximum.
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Old Sep 22, 2002 | 09:13 PM
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Default Re: Positive Pressure vs. Temperature

Anyone have any knowledge about my questions?
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Old Sep 22, 2002 | 09:58 PM
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Default Re: Positive Pressure vs. Temperature

Did you miss the post above?
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Old Sep 22, 2002 | 10:30 PM
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Default Re: Positive Pressure vs. Temperature

Well, if you look at the post(s) above, I believe he was actually replying to Lady Redhawk's post. In which I was also interested in. I was still looking for answers from my original post!
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Old Sep 23, 2002 | 07:59 AM
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Default Re: Positive Pressure vs. Temperature

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by CorsicaLT1:
<strong>Well, if you look at the post(s) above, I believe he was actually replying to Lady Redhawk's post. In which I was also interested in. I was still looking for answers from my original post!</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The information applies to you to. 3 of the 4 questions are answered. The difference between 90 and 95 MA is small. MA = milliamps.
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Old Oct 10, 2002 | 11:04 AM
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Default Re: Positive Pressure vs. Temperature

Ragtop,

Where did the 33% leave you at WOT... for example, my stock file is 98 at WOT I think... so did you move to like 65.6= 98 * 0.67 for WOT ?

And you even did 33% at all the low-throttle conditions?

Thanks,

Dean
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Old Oct 10, 2002 | 03:46 PM
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Default Re: Positive Pressure vs. Temperature

Sunset:

I did not go above above 90, so if the change would have caused me to go above 90, I replaced that cell with 90. On the low end, I left below 50 at zero and start with around 10 at 60 and let it build from there. All values are 90 by 230 ft-lbs. I may make it so all values are 90 by 200 ft-lbs or even 150 ft-lbs, but I haven't messed with it in a while.
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Old Oct 10, 2002 | 04:59 PM
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Default Re: Positive Pressure vs. Temperature

Thanks Ragtop... no I see my confusion- you're talking about the base pressure vs. torque table, not the postive pressure table... So, did you not mess with your positive pressure vs. temp table at all, and still get what you feel is satisfactory improvement in firmness? If you did change that table too, what did you do? I'm very hesitant to follow the ls1edit manual, as it puts much of the upper end of the table at zero.

Regarding the base pressure vs. torque table, leaving a maximum of 90 only really changes the 2nd and 3rd gear (1st gear isn't there and 4th is already 90...).. do these changes override what goes on in the other table?

Thanks much for your reply(ies). P.S. any ideas on my post on the timing table... when you bump timing, do you change those lower total timing values at the higher gm/cyl levels, or only where timing is more 'normal' in the twenties?
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Old Oct 10, 2002 | 07:31 PM
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Default Re: Positive Pressure vs. Temperature

I haven't changed my positive pressure table. My tranny has a shift kit.
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