Dynos of near-stock 2.5's...

Contour Enthusiasts Group Archives

Hey, I was wondering if any of you guys could post your near stock (or any regular cammed 2.5). I've been searching and all i've come up with so far is 3L and 2.5L SVT dynos. I'm looking for this so I can show my buddy so we can work on shift points for my car in the tune.

I'm gonna keep searching but i've tried a bunch of different things and no luck in finding a 2.5 non-svt...

Thanks in advance!

Stock is around 125-130 Hp.

Right, but i'd like to see the curve with the stock cams to see where the power starts dropping off...

My old 2.5L was around 150 fwhp after just the air filter chip and y pipe. I have the sheets some where, If I can find them I'll post em. Need to dyno my new built 3.0L with the nitrous still

my 2.5 put down 160whp. With the worst possible ignition problem ever.

Originally posted by 99Mystique ATX:
Right, but i'd like to see the curve with the stock cams to see where the power starts dropping off...

Power drops off right before 6k.

Ok, so shifting just after 6k is probably good then.

Hector, or anyone else with a slushbox and a chip, how hard does your car shift? Is it safe to bump up the line pressure a little bit and decrease the designated clutch slip time a little bit?

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??

Originally posted by 99Mystique ATX:
Ok, so shifting just after 6k is probably good then.

Hector, or anyone else with a slushbox and a chip, how hard does your car shift? Is it safe to bump up the line pressure a little bit and decrease the designated clutch slip time a little bit?

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??

My car shifts hard just with my trans cooler.

With the chip.....it is a little harder. I have had a chip for most of the car's life and I am at 138k now....so hard shifting can't be all that bad.

138k is good especially on a boosted car...

Maybe the quick shifting actually helps the tranny out?? Less slip time would generally mean less heat right??

On my car we set the fans to come on at a lower temp so that should help keep things nice and cool too.

Originally posted by 99Mystique ATX:
138k is good especially on a boosted car...

It has to last me until spring.

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...

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

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.

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

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.

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

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).