What size turbo are you running? We are running a tighter converter in Casper and we can stall it to 3000 easy. sounds like something else is wrong.
Torque Converter Stall Questions
- Thread starter jpowel29
- Start date
What size turbo are you running? We are running a tighter converter in Casper and we can stall it to 3000 easy. sounds like something else is wrong.
the same converter in a 2x4 and a 4x4 will stall differently correct? One that will stall say at 2500 rpm in a 4x4 will stall at a lower rpm in a 2x4 correct?
PTE's GT4582. Essentially 80mm inducer and it has a similar size turbine and A/R that I ran before on my GT4202.
I gave the turbo info to Jack at Precision Industries when I placed the order along with the following facts about my truck:
2wd - 4.56 gears/spool - 33" tall slick
Turbo needs at least 2500rpm brake stall to light
I run the external lockup controller from Fleece and it works well
Trans Data Log when fully staged (after bumping into the second yellow on):
Engine RPM = 1859rpm
Throttle Position = 9.4%
Trans Fluid Temp = 167 F
Gear = 1
Trans Input RPM = 1861
Trans Output RPM = 0
Converter Turbine RPM = 0
TCC Slip RPM = 1858
DT Ratio = 7.995:1
OffClutch PSI = 0
OnClutch PSI = 232.1
Converter locked just over 1 sec after shifting into second gear:
TCC Slip RPM = -2
TCCDC % = 89.8
TCCPCSCP PSI = 208.8
At only 9.4% throttle the fueling and torque are minimal - boost is zero.
I gave the turbo info to Jack at Precision Industries when I placed the order along with the following facts about my truck:
2wd - 4.56 gears/spool - 33" tall slick
Turbo needs at least 2500rpm brake stall to light
I run the external lockup controller from Fleece and it works well
Trans Data Log when fully staged (after bumping into the second yellow on):
Engine RPM = 1859rpm
Throttle Position = 9.4%
Trans Fluid Temp = 167 F
Gear = 1
Trans Input RPM = 1861
Trans Output RPM = 0
Converter Turbine RPM = 0
TCC Slip RPM = 1858
DT Ratio = 7.995:1
OffClutch PSI = 0
OnClutch PSI = 232.1
Converter locked just over 1 sec after shifting into second gear:
TCC Slip RPM = -2
TCCDC % = 89.8
TCCPCSCP PSI = 208.8
At only 9.4% throttle the fueling and torque are minimal - boost is zero.
You don't think a pinion brake in combination with the stock wheel brakes will hold a 2wd on the line?
I think it would help a bunch even if it didn't hold the truck it would help for sure might get another 200 rpm , I have been thinking of this idea since last year and if i run into similar issues one will get built , I just haven't had the need to justify the time .
I agree. I think it woudl give you a few hundred more RPM before you start pushing through the brakes.
Don't you guys get it yet? The converter will stall like an sob. Either the converter is defective or the tuning is way off. You pick it. Doesn't it strike any of you strange that this converter will stall 3000 easy on a lot of powerfull trucks but not this one. HMMMMMM. So you trash PI without checking your tunes, call them with a bad attitude bitching. Terry put the word out to refund your money. You must have made a great impression. Problem now is every vendor has seen this. You will be lucky if anyone takes your phone call now. I won't.
When you see Steve Cole take my side, you know you're wrong.
When you see Steve Cole take my side, you know you're wrong.
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Mark Broviak @ Danville is running a 2wd with gears and he's holding his back, but he has a Suncoast 1053 in his IIRC.
Brayden
Brayden
Josh
I then suggest he get his money back and go somewhre else. You can advise him what to do and where to go since you seem to know it all and if he is still bitching about his good core he sent in, I will send him one at no charge.
Didn't have a bad attitude when I called and I don't now either. I told them my converter stalled at 1859rpm when I needed one to stall about 1000rpm higher. I was told to buy a smaller turbine housing or return the converter for a refund since loosening it up further could burn up the clutches.
Never said I knew it all. Since you seem to disagree, maybe you can explain your stance. I'll say I think it is either a converter issue or a brake issue. If the converter was stalling and the brakes were holding it, then I would agree it could be a tuning issue, but that isn't the case here.
The only thing I see posted that makes the brakes suspect is he says he just put EBC brake pads on the truck. They come with a break-in coating that helps them get seated correctly. If they haven't been run long enough to wear through that, maybe some of his braking power isn't there.
Maybe as a test the parking brake could be used to see if that gives any more stall speed before it starts to push through the brakes.
The only thing I see posted that makes the brakes suspect is he says he just put EBC brake pads on the truck. They come with a break-in coating that helps them get seated correctly. If they haven't been run long enough to wear through that, maybe some of his braking power isn't there.
Maybe as a test the parking brake could be used to see if that gives any more stall speed before it starts to push through the brakes.
Read my post to Brayden.
Josh
You seem to think I have never seen a powerfull truck in 2WD or had any experience with them. Well you're wrong. I think you should advise him what to do. I am all ears and might learn something.
I have no doubts about that, but you still seem to be avoiding my question. How is a tune or turbo going to make the converter stall and push through the brakes?Read my post to Brayden.
Josh
You seem to think I have never seen a powerfull truck in 2WD or had any experience with them. Well you're wrong. I think you should advise him what to do. I am all ears and might learn something.
Spoke with Terry this morning and it was a completely different experience than what I had yesterday. He answered my questions, offered suggestions on what try different, and offered his help on down the road.
I worked the brake pads pretty hard to clear up the break-in coating.
I did try the parking brake test and it seemed to help out a little more. I also want to try a second gear start tune to see if that helps.
Thanks for the suggestions.
Second gear start
Upgrade rear braking/driveline brake
Possibly changing impeller to get more stall (may need to change pulse counter - that is new idea that I will need to learn some more about)
He was confident that once we overcome the brake push that the converter would come on up as it does in the 4wd applications.