BlueGreenTA

I was trying to install the
Hypertech Shift Firmnes.. But
I have heard that too much shift firmness
can damage the transmission in
the long run.

Is this true.


WHT IS THE SAFEST FIRMNESS SETTING
TO BE OK

100% -75%- 50%-25%

NEED HELP THANKS,
TOM

CAlley2001

I've heard this too. And if your not carefull you'll start a flame war. Hehe. I got a Vig3200 converter. And I heard that you should go 100% with a converter since there kinda loose to begin with. But before I went with 100% too and liked it. Nice firm shifts keep you moving. But there are people that dissagree saying they know that hypertech is responsible for there trannys blowing. But to my knowledge, there has never been any actual proff to this, and its usually something else that blows there trannys. Just my $.02

227Hawk

iTrader: (1)

<img src="images/icons/rolleyes.gif" border="0"> <img src="images/icons/rolleyes.gif" border="0"> <img src="images/icons/rolleyes.gif" border="0"> <img src="images/icons/rolleyes.gif" border="0">
SHUSH they'll know were in here.My feelings
are.......... found by search <img src="gr_images/icons/wink.gif" border="0"> Pretty much
makes me FLAMEPROOF <img src="gr_grin.gif" border="0">

OBSSSD

Go ahead and use the 100% as long as you don't have a shift kit. You'll be fine, I know mine is after 3 straight years of beating it silly at that setting. It is as smooth as it was the first time I bumped it up.....

227Hawk

iTrader: (1)

<img src="images/icons/rolleyes.gif" border="0"> Hand's OBSSSD a flame proof suit!
<img src="gr_grin.gif" border="0"> <img src="gr_grin.gif" border="0">

Black LS1 T/A

I ran with 100% (before Converter) for about 10 months and had to replace my pump. (Since the tranny was coming out, that is why I took the plunge for the converter at that time.) I will say, however, that it was in winter time on a very cold evening and I was not completely warmed up.

Doing it by computer rather than a shift kit bumps up the line pressure and the tranny mechanic said when he read my line pressure, it was too high.

Also, you're at max firmness during WOT, so it does not help your racing any better to drive it around with it slamming at part throttle. It's also harder on your drivetrain. The one positive thing; they say it DOES save your clutches. <img src="gr_images/icons/wink.gif" border="0">

With 3.73s before the converter, it was actually uncomfortable to have the shift firmness at 100%... my head snapped back on even part-throttle shifts. I'm too old for that, now. <img src="gr_grin.gif" border="0"> I think it contributed to a kink in my neck.

I think I'd like it with the converter in now, and I've bumped it to about 25%, but for MY peace of mind, I don't use 100% anymore.

TIFWIW. <img src="graemlins/gr_judge.gif" border="0" alt="[judgement]" />

C5XTASY

This is an urban legend. I've read this statement before about being at 100% shift firmness at WOT, so The HPPIII won't have any effect. Well, that's sort of right. Without the Hypertech, you're at 100% STOCK shift firmness at WOT. With the Hypertech, you add firmness to both partial, and WOT, shifts. It really wouldn't make any sense to only firm up partial throttle firmness, and not touch WOT. <img src="images/icons/confused.gif" border="0"> Either try one out, or give Hypertech a call for verification. <img src="gr_stretch.gif" border="0">
Ed

Black LS1 T/A

[quote]Originally posted by C5XTASY:
<strong>This is an urban legend. I've read this statement before about being at 100% shift firmness at WOT, so The HPPIII won't have any effect. Well, that's sort of right. Without the Hypertech, you're at 100% STOCK shift firmness at WOT. With the Hypertech, you add firmness to both partial, and WOT, shifts. It really wouldn't make any sense to only firm up partial throttle firmness, and not touch WOT. <img src="images/icons/confused.gif" border="0"> Either try one out, or give Hypertech a call for verification. <img src="gr_stretch.gif" border="0">
Ed</strong><hr></blockquote>

I didn't say they don't firm up part-throttle. <img src="images/icons/confused.gif" border="0">

I said:
"Also, you're at max firmness during WOT, so it does not help your racing any better to drive it around with it slamming at part throttle. It's also harder on your drivetrain. The one positive thing; they say it DOES save your clutches"

In fact, they DO firm up part-throttle shifts.
That much is obvious. What I was alluding to was that it STILL does not make your car faster at WOT because it is max'd out there anyway.

I went and checked the difference between a stock and HPP file where the shift firmness is at their 100% firmness.

It turns out it IS an urban legend, I guess. <img src="gr_emb.gif" border="0">

It turns out they decrease the motor current by 103 milliamps in alternating columns from 0 to 96% of WOT.

I stand corrected about the WOT statement.

I still would not have it banging into gear at all those part-throttle positions.

PS: I wonder what their logic is in alternating columns for the current decreases?

C5XTASY

[quote]Originally posted by Black LS1 T/A:
[QB]

I didn't say they don't firm up part-throttle. <img src="images/icons/confused.gif" border="0"> <hr></blockquote>

I didn't mean to allude in my statement that you said that, either. I was just addressing the WOT portion of the post. Sorry if it came across that way. <img src="gr_stretch.gif" border="0"> Personally, I would not leave the HPPIII set at more than the 50% firmness setting, but each to their own. I like the Hypertech, it has addressed some downshift issues I had with the car. <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />
Ed

iateyourcat

I set mine at 100% when I first got it just to try it but, I liked it so much that I never changed it back.

ToplessTexan

[quote]Originally posted by C5XTASY:
<strong>Personally, I would not leave the HPPIII set at more than the 50% firmness setting, but each to their own. I like the Hypertech, it has addressed some downshift issues I had with the car.</strong><hr></blockquote>

HPP3 makes the sames shift point adjustments to both up- and down-shifts, independent of firmness changes. Ed, I wasn't sure if you were indicating your improved downshift was in firmness or point. I would like it more if it made shift speed adjustments as well. <img src="gr_sad.gif" border="0">

I've been on 75% as long as I can remember.

gwj

I've been trying to keep a thread going in the Drivetrain section, where folks would monitor their acctuator solenoid current with different "tweaks" so we can set up a database and try to determine what the "norm" is for changes that effect the trans line pressure:
At WOT:
calculated load
*acc solenoid current
trans temp
current gear
pre/post HPP3 settings
pre/post shift kit
pre/post MAF mods

+ it seems that some pcms work on a different scale year-wise. If you can contribute some ATAP readings, or general observations, please reply to my thread in drivetrain and/or email me any data you have.

C5XTASY

[quote]Originally posted by ToplessTexan:
<strong>

HPP3 makes the sames shift point adjustments to both up- and down-shifts, independent of firmness changes. Ed, I wasn't sure if you were indicating your improved downshift was in firmness or point. I would like it more if it made shift speed adjustments as well. <img src="gr_sad.gif" border="0">

I've been on 75% as long as I can remember.</strong><hr></blockquote>

Topless, I realize the HPPIII makes shift point changes independent of firmness and also that both up and downshifts are affected.
The problem I was having was that WOT downshifts, between 30-35 mph and 70-75 mph, were inconsistent as far as dropping down the same number of gears each time (according to friends with C5s, a very common issue because of PCM load inputs, etc.,) By dialing in +2 mph on the 1-2 shift and +5 mph on the 2-3 shift, the problem was eliminated. However, when I did this, and used a 75% firmness setting, I was routinely breaking the tires loose on both upshifts and hitting the rev limiter. I did not adjust the rev limter up to 6300 rpm, but perhaps should have. Dropping the 2-3 shift to +4 mph and the firmness to 50% firmness cured the upshift rev limiter problem on both shifts. By the way, I carefully calculated out where my rpms would be after setting my shift points and am only about 50 rpm over 6000 on the 1-2 at WOT. The 2-3 is still well under 6000 rpm. That rev limiter was coming in at exactly 6200 rpm indicated on the tach when the tires broke loose. When the tires didn't spin, I didn't hit the limiter.
All this occurred over about a four day span last fall before I put the car to bed. I'm looking forward to getting the car out and experimenting again this spring. I also want to try the power programming. I'm running a stock MAF because, I've read numerous times, it seems the HPPIII doesn't like the aftermarket MAFs very well and accurate air flow monitoring is crucial to success with it.
It would appear that shift settings of +2 mph on the 1-2, +5 mph on the 2-3, firmness setting of 50%, rev limiter of 6300 rpm, low fan turn-on temps for a stock thermostat and power tuning may be the way I end up going come spring. I'm really ready for winter to end! <img src="gr_grin.gif" border="0">
By the way, I realize that increased firmness is different than adjusting the shift solenoid speed, but, it seems to me, that increased line pressure which causes the clutch packs to lock up sooner, will result in essentially a quicker shift because less time is spent with the clutches not fully engaged. This quicker lock-up of the clutches should mean that the car is applying full power to the wheels sooner (i.e., same thing as a faster shift). Is my thinking off-base? <img src="gr_stretch.gif" border="0"> Thanks!
Ed

[ March 05, 2002: Message edited by: C5XTASY ]</p>