Converter lockup

[Indigo Joe]

I wasn't sure exactly where to post this, so I will start here. I put together an older 2009 with a modern 8 speed which runs great.

In the bad old days of the 80s and 90s we used to be able to lock a converter in 3rd gear and feel it lock decisively (for a while) and gain 2 or 3 mph.
I tried that again lately as soon as I shifted into 5th at WOT with a reasonably healthy 7.0L N/A Challenger out of curiosity, using a reasonably new 3rd gen (2020) HP70 with a stock scat pack converter, and it DIDN'T like it.

I assume the HP90 converters would act about the same way. That's kinda why I posted here, a larger knowledge base and a similar converter. I do have a redeye and won't bother trying it with that, or doing anything with it.

It acted like a snowmobile clutch, RPMs didn't change but the MPH increased from 104 to 109 as the converter clutches were trying to engage.
I am sure it didn't do the clutches any good and was wondering if what I was trying to accomplish is even possible with these modern factory converters ? Increasing the apply pressure and fill time didn't seem to change anything, so I will just forget about trying that again.

Maybe someone can bring me up to speed somewhat on multi-clutch setups that are made for that, that would work with a 70 or 90. I am curious.

Attached is a snip of the 4-5 shift and the attempt to lockup soon thereafter.

Thank you.

 

[BULL]

I don't have any experience or insight, but I am curious as to how you are manually engaging the lockup?

 

[Indigo Joe]

The tune gives you the option to which gears you would like to utilize the lockup, Bull.. I chose 5 to 8. I don't know much about it besides that however.

 

[covidcommander]

I know nothing but not sure about doing that 🤔 anyone else try that?

 

[Indigo Joe]

Here is another 4-5 from the 30th, and it calls for the lockup at the end of the shift/beginning of 5th same as before. Note the MPH climbs substantially from 104 to 118 but the RPMs do not climb all that much. It appears the clutch starts to take hold when the ramp starts upward. I won't mess with doing that again until I get more information. There are 2 or 3 clutches in there from what I understand now, I would think there would be a way to get them to apply firmly and quickly with the available adjustability. I have HPT but I am not going to screw around without a clue.
It's not all that big of a deal I guess but I am curious