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Joined: Sep 2002
Posts: 3,944
Hard-core CEG'er
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Hard-core CEG'er
Joined: Sep 2002
Posts: 3,944 |
Originally posted by 99Mystique ATX:
We got the chip set up tonight and my car shifts VERY quick. I personally love how it shifts, it is aggressive though and im worried about damaging the tranny. Any thoughts?? At full throttle the car jerks forward when it shifts. 1st to 2nd is very quick and 2nd to 3rd is a little more relaxed, still better than stock.
Thoughts??
Keyser and I talked about the shift points of a boosted CD4E along time ago and he said, "There is a regular shift pattern and a WOT shift table. If it were my car I would set the WOT shift points for about a 7k shift and leave the others alone. I'd also stiffen up the 2-3 shift."
Since your car isn't boosted, then I would suggest leaving your shift points were they are and only upping the line pressure during WOT. This will allow you to still have some since of driviablity during daily driving stints and a aggressive shift package when you really need it.
Once an ATX is mated up to a boosted or jacked up engine though, yeah you would want to up the line pressure during part throttle conditions to lessen the amount of slippage, but not by alot. And this goes for any ATX, because if you just aimlessly up the line pressure during all conditions, you will run the risk of blowing a seal or even a drum.
Something to think about... Most of the damage your hear about on a CD4E is from run-away line pressure situations. And most of the time, that situation is merely the person running around town while the trannys shift program is in Limp Mode because there is a problem with the thing and they can't get it fixed or have no idea what is going on. This mode defaults the pressures to 110psi throughout. Running at such a high pressure, under all conditions, can damage a lot of stuff!! So be careful and good luck... 
Phillip Jackson
`98 Mystique LS
262K+ and counting...
ATX rebuilt @ 151K
"This storm has broken me, my only friend!" RIP Dime
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Joined: Dec 2001
Posts: 6,910
Hard-core CEG'er
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Hard-core CEG'er
Joined: Dec 2001
Posts: 6,910 |
car had a SVT airbox and the 17s on it at the time on a mustang dyno  this is with the SVT airbox, main cat and exhaust, K&N and a optimized y-pipe on a dyno jet 
- 95 Mystique LS - Zetec/5spd
- 99 Contour SeVT Sport - Duratec/5spd
Official NE-CEG Contour/Mustang Family
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Joined: Aug 2003
Posts: 1,356
Hard-core CEG\'er
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OP
Hard-core CEG\'er
Joined: Aug 2003
Posts: 1,356 |
Originally posted by unisys12:
Keyser and I .... So be careful and good luck...
Thanks a lot for the info! With my tune, we went with the stock superchips tranny line pressure increase, which increases the line pressure a little bit at all throttle positions. We also dropped down the shift time a little bit. I take it that in the stock program the 2nd-3rd shift has too low of a line pressure??
My street tune increased the line pressure a little bit and decreased the "designated clutch slip time". The car shifts very quick and firm now. But, if this is too much, i'll do another tune that's a little less aggressive for the street/daily driving. Personally, I like the firm shift. I guess thats probably because it makes it more like a stick, but still...
Brapple, thanks for the graph, thats exactly what I was looking for. I guess the car shifting around 6300 is probably a good place to shift.
1999 Mystique LS V6
Alpine CDA-9807, Rear deck sub, Opt. TB, K&N RU-3530/MAF adaptor, custom heatshield, FSVT 17's, SCT 4-program chip, Eibach's/ST200's, Hella Fogs...
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Joined: Dec 2001
Posts: 6,910
Hard-core CEG'er
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Hard-core CEG'er
Joined: Dec 2001
Posts: 6,910 |
Originally posted by 99Mystique ATX:
Brapple, thanks for the graph, thats exactly what I was looking for. I guess the car shifting around 6300 is probably a good place to shift.
just remember that I have a 5spd and from the thread it sounds like you have a automatic
- 95 Mystique LS - Zetec/5spd
- 99 Contour SeVT Sport - Duratec/5spd
Official NE-CEG Contour/Mustang Family
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Joined: Aug 2003
Posts: 1,356
Hard-core CEG\'er
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OP
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Right, but both are regular cammed 2.5 Duratec's probably making power/dropping off at similar places.
Yes, unfortunately, my car is an auto.
1999 Mystique LS V6
Alpine CDA-9807, Rear deck sub, Opt. TB, K&N RU-3530/MAF adaptor, custom heatshield, FSVT 17's, SCT 4-program chip, Eibach's/ST200's, Hella Fogs...
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Joined: Dec 2001
Posts: 6,910
Hard-core CEG'er
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Hard-core CEG'er
Joined: Dec 2001
Posts: 6,910 |
Originally posted by 99Mystique ATX:
Right, but both are regular cammed 2.5 Duratec's probably making power/dropping off at similar places.
yup, they are both from my car 
- 95 Mystique LS - Zetec/5spd
- 99 Contour SeVT Sport - Duratec/5spd
Official NE-CEG Contour/Mustang Family
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Joined: Jun 2000
Posts: 5,854
Hard-core CEG'er
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Hard-core CEG'er
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last time i had it dyno'ed, my car put down 175.3hp, completely stock except for a deleted resonator, and a KKM intake (at the time).
1999 Silver Frost SVT
#609 of 2760
Quaife, lightened SVT Flywheel, SPEC stage II clutch, removed resonator, k&n drop in - various other goodies too.
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