Help Please-->Converter flash/shift extension
Thread Starter
Joined: Nov 2001
Posts: 7,303
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From: Delray Beach, Fl.
Help Please-->Converter flash/shift extension I hear guys say u should have a true flash stall of 300 to 500 BEFORE PEAK TQ?Is this true?
What kind of drop in rpm should u see in between 1 to 2 and 2 to 3 from a shift point of 6800 thats inducive to max effort ET?My peak tq is 4600 and my peak hp is 6500
I would like the info so I can compare to my autotap info.
Thanx
JS
<small>[ July 11, 2002, 10:00 PM: Message edited by: JS ]</small>
What kind of drop in rpm should u see in between 1 to 2 and 2 to 3 from a shift point of 6800 thats inducive to max effort ET?My peak tq is 4600 and my peak hp is 6500
I would like the info so I can compare to my autotap info.
Thanx
JS
<small>[ July 11, 2002, 10:00 PM: Message edited by: JS ]</small>
Re: Help Please-->Converter flash/shift extension Running ST3500 -2.2 STR about 2 weeks, RUNNING STOCK CAM,shifting @ 6100 RPMS never drop below
5100 on WOT shifts stalling at 3200 with 3.23's, on 275/40/17 nitto's DR's ,,flyes off the line
5100 on WOT shifts stalling at 3200 with 3.23's, on 275/40/17 nitto's DR's ,,flyes off the line
Re: Help Please-->Converter flash/shift extension 300 - 500 rpm before peak torque is the basic rule of thumb. The flatter the torque curve, the more you can flash closer to peak torque. You do not want to flash above peak torque and even on a flat torque curve, I would go for 100 - 200 rpm below peak torque.
There is not as magic a rule of thumb on the shift extension, in part because different converters couple-up at different points, so the converter's efficency comes into play. 6000 rpm is probably as high as you would want to hold because that's probably about where your HP curve starts to flatten out. That would keep you pumping at max HP for the longest period, assuming the converter can handle it efficently.
<small>[ July 12, 2002, 08:22 AM: Message edited by: Ragtop 99 ]</small>
There is not as magic a rule of thumb on the shift extension, in part because different converters couple-up at different points, so the converter's efficency comes into play. 6000 rpm is probably as high as you would want to hold because that's probably about where your HP curve starts to flatten out. That would keep you pumping at max HP for the longest period, assuming the converter can handle it efficently.
<small>[ July 12, 2002, 08:22 AM: Message edited by: Ragtop 99 ]</small>
