Propulsive Dynamics A/T upgrade Beta results
- Thread starter Chris@Motiv
- Start date
So my transmission slipping at 600whp is non-existent? I did my all proper maintenance on it when it was due. full synthetic fluids, etc. When it slams out of gear and redlines after trying to shift under 26psi, is it just my imagination? Must be.
The 6at is good to around 650 if it's in pristine condition, but most I've seen start to tap out right around 600 these days, alpina or not. Alpina seems to mostly help them shift at that level, doesn't seem to help slip all that much. The video doesn't really show much with the car at low boost. It'll be interesting to see which of these auto upgrades work out and which tables will be available in the upcoming transmission xdf.
With a combo of brake boosting and antilag, I'm able to build about 12psi before it wants to push through. So without an increased stall or trans brake, timing is everything to build max boost right as the light pops.
I was hoping you'd chime in! Surprised it took this long. As we can all read, I'm not trying to prove anything. I (not affiliated with any shop) am paying out of pocket to build the car and test this trans throughout all of it's ranges, from daily driving, to quirks of the twin turbo, to the average person's 500-600whp build, and now in to the 750-800whp "big power" range. But, having said that, let's be honest, horsepower itself isn't going to break a trans, torque/shock is what's going to put it in to the ground.
I am especially appreciative of your last sentence, because you've just qualified this thread as being meaningful since the car will be putting down more than your 700whp requirement later this week and I do race it, every weekend, plus 2 or more nights a week while tuning/logging.
Thanks man. I've been doing the best I can to get you guys the feedback you deserve.
Yep. Same car.
It is very solid from a dig. I'm launching with anywhere from 10-15lbs of boost on 275/40/17 MT ET streets and there is no hesitation/groaning during the pull or while driving easy later on. I'm confident 60' times will drop with this trans alone as launching technique is refined, but a higher stall will definitely make it easier to launch with your target boost. Unfortunately, the reality of increased stall won't be as easy as swapping in a different torque converter since the oem case was never originally designed for drag. I'd imagine the converter would have to be larger, thus requiring a different/modified bell housing. I'm sure Jason is already working an upgrade though.
I was able to get the stage 3 pump in, but I won't get a chance to install the pi rail and meet with chris for tuning/logs until Thursday at the earliest. I'm really trying to get some good pulls/videos before I head out on vacation.
I was under the impression that the single turbo cars weren't building enough boost of the line.
Thanks for your input looks like you are getting somewhere, love to see how you will do at strip.
I was under this same impression. thought that was the reason why most singles end up with worse 60 ft times, slower et's, and much higher mph despite making a lot more power.
I found a guy that builds custom converters.said he can build me a 3200 true stall for the 6hp21.but im going manual swap so that wont be happening.
Dedicated much.
My missus would punch me in the face if i told her I'm going racing every weekend and two nights a week hahaha.
I'm lucky to even want to care about racing once a month! I think my car looks good with dust on it anyway.
Just a small update, Jimmie got all his fueling set up and installed so now its 100% E85. We were able to get it cranked up to 26psi but the HPFP just isnt cooperating with us. It didnt matter how much fuel i added or took away via PI and/or flash it seemed to target 10bar. Some runs it was fine others it would just drop to low. Not to add hype or anything but jesus that thing shifts hard at 26psi and without skipping a beat. We did try some of the higher gears 4th and 5th and it hasnt shown any signs of letting up. Ill have to dig through some logs and post them when i get home.
The goal at this point is to figure out this HPFP issue and get it up in the 28-30psi range for the Ocala half mile at the end of the month. This should be a good stress test. Hopefully we can get this sorted out quickly.
The goal at this point is to figure out this HPFP issue and get it up in the 28-30psi range for the Ocala half mile at the end of the month. This should be a good stress test. Hopefully we can get this sorted out quickly.
