I currently have a SY3500 with 3.73 gears and run ET Streets at the track and will run drag radials around town. My best 60' at the track is 1.81 with that combo with the ET Streets at 20 psi. I recently got a 218/224 cam and thought a higher stall would be better... which would be better for my setup, a ST3800 or TP4000? Yank's website lists the ST3800 as a "street/strip" converter and the other as a "race" converter.

I am concerned that the TP4000 will be too much around town as I drive my car mostly everyday. I don't mind the SY3500 at all and some people classify that as "loose". I think it's fine. Another concern is heat... I can't get a trans cooler since I have a ram air setup. Currently, my SY3500 has no problems.

Any advice??

-Jim

<small>[ September 17, 2002, 02:14 PM: Message edited by: key master ]</small>

 

I think the ST-3800 will "feel" better around town and give excellent 60's as it hits hard off the line but it will lose out to a PT-4000 from a roll. The PT-4000 will probably match the ST-3800 60' wise but I can't be sure. The ST-3800 will feel tighter around town than the PT but I love my PT-4400 from a roll. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> Just loose as sin for daily driving.

 

Ohh, why can't you remotely locate your ram air unit?

Personally I would do a trans cooler over a ram air unit anyday. Any power gained from the ram air will be negated by excessive tranny heat. Plus trannys are expensive!

 

Why would a PT4000 be better from a roll? More efficient? Or simply because it has a higher stall?

I've been told that the PT4000 would roughly feel like my current SY3500 around town... sounds good to me.

How would I "remotely locate" my ram air??? Or did you mean remotely locate the cooler? If so, where if not right in front of the radiator?

-Jim

 

I actually remotely locate the cooler. It is best in front of the radiator but you can actually mount it under it also, laying flat or parallel with the ground. Basically just having the fins there will help better than nothing, I've even hear of people doing them in their fender wells.

Also you could do it in a location that doesn't get much air and make your own ram-air with some tubing from home depot to get some air across it. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

OOh, the reason the PT would be better form a roll is it is more effecient, kinda like the SY TC's. It is a little easier on your tires off the line but is much better from a roll than the ST series.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by key master:
<strong>Why would a PT4000 be better from a roll? More efficient? Or simply because it has a higher stall?
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">YTP 4400 is more efficent and has a longer shift extension.

<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
I've been told that the PT4000 would roughly feel like my current SY3500 around town... sounds good to me.
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Not a chance. I've driven both and the YTP 4000 is definitely looser. The extra STR does not negate the extra 500 rpm of stall. Plan on using another 300 or so rpm around town.

<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
How would I "remotely locate" my ram air??? Or did you mean remotely locate the cooler? If so, where if not right in front of the radiator?
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I have a cooler with FTRA, its no big deal. I mounted a 16000 GVW on the side of condensor and use the FTRA to pin it in place on one corner. You could also mount it off to the side, using the "Dope" method (I hope I got the right guy <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> ). You NEED a cooler, even with your SY 3500.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ragtop 99:
<strong>You NEED a cooler, even with your SY 3500.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I only see max TFT around 205 or so with my SY3500+3.73s and no cooler even during the Texas summer, usually much less like 180-190. I understand the cheap insurance idea, but why do you say you need one? Mike seems to discourage the "need" notion too. What am I missing?

 

I,ve said it before, all say it again; if you're seeing close to 200 Degs, you should be worried. <img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" /> The hottest my trans gets in 90+ temps, stop and go is 185-190. I won't even tell you what it would do at temps in the 50's or 60's on the highway!!!!!!!!!! And yes, my very cold transmission shifts/locks-up just fine (actually shifts harder when it is cooler). Don't buy into that "too cool" rule. http://www.transmissioncenter.net has a nice temp chart that will make most of you "see the light" finally. When I finally get a converter, I bet I will not have any trans issues because of my pre-converter preps I have done. Just FYI

 

Mike does not discourage the use of a cooler, especially if your temps hit 200* or higher. Talk to him and tell him you are going to flog the car. He'll tell you to get a cooler AND a deep tranny pan too. <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />

If you start flogging a high stall converter on the street, or at a road course, or by hot lapping, the tranny will get too hot. Even an efficent converter generates a lot of heat if you keep it in the rpm band where it is generating torque multiplication and running at high rpms.
I try to keep mine in the 160* - 180* range.

 

A ST 3800 will not feel tighter than the SY 3500. May only be a hair looser as the higher STR is some help.

Raising your part throttle shift points with edit will help tighten things up.

 

OK, several things have been decided: I will need a cooler for any converter I get. Also, the YTP 4000 will be noticably looser than my SY3500.

Now, will the ST3800 feel much looser than my SY3500? I would think it would feel tighter because of its higher STR with only 300 RPMs higher (3800 - 3500 = 300). Would that be a true statement?

I really don't want anything looser than my SY3500, I think it approaches my street limit of looseness, even with my 3.73 gears.

-Jim