Posted By: sixpacksteve
8" convertor don't understand - 12/02/12 11:16 PM
i had my convertor ste up for my motor 5500 stall, bout 550 hp worked great, was flashing bout 4500. put my new motor in bout 700 hp.
ran on chassis dyno it flashed at 6200. i thought it would be the opposite. should of flashed lower? is this correct?
Posted By: Locomotion
Re: 8" convertor don't understand - 12/02/12 11:26 PM
Converters have a "range" that is affected by the torque & HP of an engine. The stronger the engine, the higher it will "flash".
Posted By: sixpacksteve
Re: 8" convertor don't understand - 12/02/12 11:30 PM
thats fine. for some reason i thought it would move down. thanks
Posted By: LSP
Re: 8" convertor don't understand - 12/03/12 12:34 AM
[quoteMore TORQUE moves the stall point UP...nothing to
do with HP
Maybe not in your case, but there are applications where the converter stall or flash is closer to the power peak than torque peak.
Posted By: sixpacksteve
Re: 8" convertor don't understand - 12/03/12 12:55 AM
peak is suppose to be some where around 6800-7000
Posted By: hemi-itis
Re: 8" convertor don't understand - 12/03/12 01:32 AM
How are you testing flash?
Posted By: b1dartsport
Re: 8" convertor don't understand - 12/03/12 02:18 AM
I have an A-1 converter that stalled 4800 on a 360 super stock motor and 5500 when I used it in my 408 stroker. All converters are built to stall a certain rpm by a certain torque number,if you move the torque number up the stall rpm goes up.
Posted By: Locomotion
Re: 8" convertor don't understand - 12/03/12 02:32 AM
An Autometer Ultimate playback tach is an excellent tool to see what's going on with converter flash, rpm drops, shift points, etc. You can even see different flash points when the weather changes, mainly between seasons.
Posted By: sixpacksteve
Re: 8" convertor don't understand - 12/03/12 01:22 PM
the chassis dyno shows where it flashs, going to call lenny at ultimate and give him the specs so he can reset it. didn't think there would be such a huge difference. probably need to change rearend gears, and bigger tires also!
Posted By: Bad340fish
Re: 8" convertor don't understand - 12/03/12 05:22 PM
My converter always flashed higher on the chassis dyno vs real world. Might be something to consider.
Posted By: sixpacksteve
Re: 8" convertor don't understand - 12/03/12 10:35 PM
so if i had a 1500 hp motor this wouldn't flash at all?
My first pump gas stroker made peak torque at 4500 RPM and peak HP at 5600 RPM, the stupid car woould run its fastest ET and MPH by shifting it at or above 7200 RPM 
Go to the track and make a plan to run the car enough to make it consistent and then try shifting it at 5500 RPM in all gears for several runs and then try 6000 RPM for several and then 6500 RPM, the goal is to find the RPM that makes the car the fastest, with me anyways 
Once you find the RPM spread, say it runs the best by shifting at 6500 RPM but not lower than 6500 RPM or higher than 7000 RPM, try shifting it at 6700 RPM for several runs and whittle a away hundred RPM at a time until you find out what it likes at that track that day 