Modify torque converter for WOT lockup? July 24, 2013, 03:37:05 PM I have a Precision Industries "3500 stall" single-disc lockup converter in box fresh from PI (previously used) ready to go into the car. I am second guessing myself and am curious if it's worth sending back to PI to have it switched over to multi-disc so the car can be locked up at WOT. Anyone have opinions on this? From what I understand, with any decent power, the single disc won't stay engaged at WOT.The only thing holding me back is the $485 parts and labor charge. Expensive, but if it's the type of thing that only needs to be done once...The only other consideration is that I don't remember if I can control lockup under wot at only certain conditions. I know lockup will hurt if it's always locked at WOT, since it would lose the torque multiplication below. I need to see if the Baumann TCS give me more control than simple TPS and gear conditions. Quote Selected
Modify torque converter for WOT lockup? Reply #1 – July 24, 2013, 03:53:44 PM I think the transmission computer answers my question...I don't get much control over the lockup. The Baumann software (and possibly hardware) is absolutely terrible for making these more useful functions available. Quote Selected
Modify torque converter for WOT lockup? Reply #2 – July 28, 2013, 11:11:16 PM I always thought AODs have a mechanical lock torque converter???No way to change it...from what I have read....hmmTravis Quote Selected
Modify torque converter for WOT lockup? Reply #3 – August 02, 2013, 02:45:29 AM Errrr, I'm running a 4R70W. Forgot to mention that above. The electronic control does require an AODE or 4R70W though. Quote Selected
Modify torque converter for WOT lockup? Reply #4 – August 02, 2013, 08:16:27 AM Or a 3rd party tranny controller...Travis Quote Selected
Modify torque converter for WOT lockup? Reply #5 – August 02, 2013, 12:59:34 PM Quote from: turbotrav;419442Or a 3rd party tranny controller... I have one of those on the shelf too - I just need to get it plumbed in one of these times. The PI unit shouldn't run much warmer than the stock converter since it is up to 30% more efficient than oem 12" units. The stock converter with stock radiator cooler would run 170-172ºF. Not bad but not great either.Anyway, there is little reason to run multi-disc with how sloppy the lockup controls are in the Baumann unit. Supposedly they are going to release an update to provide more control, but I also know I heard this same thing 2 years back. A software update just never comes... Quote Selected
Modify torque converter for WOT lockup? Reply #6 – August 02, 2013, 09:30:16 PM I havent had any personal experience with the Baumann unit...I guy on here with a turbo 5.0 turbocoupe loves his...controls a 02 mustang V6 4R70 with stock 3.8 v6 converter with lockup...he has never complained...You can always use the 94-95 Mustang 5.0 auto computer...that has built in electronic tranny controls. You would need quarterhorse and Binary Editor to modify stuff. Might give you more resolution that you are looking for.Travis Quote Selected
Modify torque converter for WOT lockup? Reply #7 – August 05, 2013, 01:02:11 PM After I got the unit and got behind the basic "car shifts" functions, I found the baumann unit to be overpriced for what it is. Reliability is something that would require testing, but I could create a transmission computer from scratch that does more than the Baumann unit, and that isn't my specialty of profession. The poor lockup control and shared fuel pressure table annoys me the most. I would also prefer something other than "rpm's/speed" for input. I don't know if the EEC provides engine load, but load would make much more sense for shift points than anything else.Supposedly they used to have more features in the software (and before they took their sweet time in upgrading the software to something that works well on systems past Windows 2000), but they were removed permanently since they just confused some people. I'd like to see those as an option, not removed because some of the customers couldn't figure them out. Anyway, I'm keeping the converter I have here now. Hopefully I can get it installed soon. I want to get the car out on the street and test the flash stall speed before the swap, for comparison. Quote Selected
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