Dragaholic

iTrader: (180)

Im trying to figure out where my rpms will fall after shifts so that I can have a rough idea what rpm range I need a cam to make its most power. Does shift extension vary on setup/power? If so, is the vary a lot? Those running this converter or have, please post up your shift extension you got out of it. Thanks.

BADFNZ

iTrader: (19)

Yes power will shift SE one way or another; more power will raise the SE a bit. I just got a PT4200 and the shift extension should be around 5700 or so, but it is around 6100. I've seen someone else have this problem w/ a PT4200 they just received. Just FYI.

Dragaholic

iTrader: (180)

Wow, so when the car shifts, it doesnt fall under 6100 rpms? Why is it so much more than what its rated for? (5700) Where did you get that rating anyway? I'd like to know what the PT4400 is rated at. Also, how much power are you putting down. Lastly,

Why is that a problem? Isnt the higher the shift extension the better?

XFiveLiter

I shift at 6400-6500 and it never falls below 5800-5900 (stock tach).

xxxhp

I have PT4000 behind a 427 motor. Its advertised SE is 5600 however I get 5800 SE when shifting at 6700 rpm. I got those values from an Autotap log.

Dragaholic

iTrader: (180)

Anyone else running this converter who would like to share their shift extension? It seems to vary from one application to the other. But from what Ive been told, Yank makes their converters to the specs of the car its going in. So if their were to make one for a completely stock 346 cu. in. and then one for a 427 cu. in., they would be slightly different. This is what Ive been told. I dont have the converter in the car just yet, but hopefully soon. Just trying to get a rough estimate so that I can start looking for the right cam. Thanks.

JNorris

iTrader: (4)

My PT4xxx converter had a shift extension of 6100RPM. As it turns out my PT4xxx was really a 4800-5000.

I think it is really unlikely that Yank can build a converter that will stall to an exact RPM. It will be within a 100-200 RPM range.

Good luck

BADFNZ

iTrader: (19)

Looks like there's a few of us that got the special PT5000

zupmanZ28

iTrader: (2)

I'm one of those special people. My PT4000 never drops below 6200 rpm (autotap verified) on a shift.

Eric

JaSSon

iTrader: (11)

I was one of those people too. I sent it back after a week in my car, told Dave what was up, its been repaired and sent back, for free. I had the luxury of a friends ST3500 sitting in his shop while the PT4200 was gone, put it in and ran #s in sig. If the PTs not right I may have to keep the ST3500.

Dragaholic

iTrader: (180)

Can higher stall and shift extension than what its rated at be a bad thing?

BADFNZ

iTrader: (19)

Well not if you have a high spinning motor. But for us with shift points around 6500, a 6100 SE is not good. And not to mention it's loose as hell on the street.

Dragaholic

iTrader: (180)

Well hopefully my converter was built right. I havent gotten around to finishing up the install, but should be done sometime this week.