Convertor slippage?
- Thread starter rb68rr
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TCI - TECHNICAL INFORMATION: Racing Calculators Fill in the blanks. This calculator doesnt add tire growth into calculation. You have to estimate that. If the converter is locked there should be less than 1% slip. A lot of lockup converters wont completely lock at WOT under high boost.
turbojimmy
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There was some good discussion in response to this thread I started:
http://www.turbobuick.com/forums/transmission-talk/220781-converter-too-loose-2.html
There's another one somewhere, too, that I started around the same time but I'm late for work.....
Jim
http://www.turbobuick.com/forums/transmission-talk/220781-converter-too-loose-2.html
There's another one somewhere, too, that I started around the same time but I'm late for work.....
Jim
TurboMonte 2
Car Nut
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Haven't you replaced that trashy converter yet?
Your previous thread & video indicated you're making lotsa rpms--but going nowhere fast.
turbojimmy
Supporting Member
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- May 26, 2001
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It depends on whether it's a lock-up or not. A lock-up converter is going to slip a lot more until you lock it. A non-LU is more efficient across the board but as a result does not slip as much down low to aid in spooling.
You also need to correct for 28" tall tires if you are using them, assuming you're using your VSS signal for the MPH in the formula. Your VSS will be incorrectly reporting MPH because the speedo gear in the trans is geared for a 26" tall tire.
Jim
I just got off of the phone with Precision Industries. They said that on the t-brake I should be able to mash the pedal all the way down and the converter should stall at 32-3500 and not 5200 rpm. They say it sounds like the fins are laid over and causing it to stall very high. And when I set the brake it revs way up to 5000+ at around 1/2 throttle.
I'm sending it back and having it repaired and upgrading to a 5-disk clutch. That way I can lock it at WOT.
Hopefully this is where all my power is being absorbed and I can start having some fun with this car.
I'm sending it back and having it repaired and upgrading to a 5-disk clutch. That way I can lock it at WOT.
Hopefully this is where all my power is being absorbed and I can start having some fun with this car.
sorry I hi-jacked your thread but I would say that 9% is too much. Are you locking the converter?
That sounds like a winner....I mean look at your car when it leaves. ALL the power is getting to the wheels. I seen you twist that driveshaft at BG, :biggrin:
I have a lockup and I'm seeing 33% and that is not good at all.
turbojimmy
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Sorry, went back and looked at my logs. It wasn't 6% unlocked, it was 3.6%.
I'm getting 25% locked with a 5-disc @ 5100 RPM. Trans and converter are at CK Performance right now trying to get it sorted it out, actually.
Jim
No, not at WOT, unless your aftermarket chip has it programmed to do so (very few can do this).
That's probably not terrible for the stock D5, especially with some age on it.
