Converter guys
Thread Starter
Drifting
Joined: Jun 2002
Posts: 1,682
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Converter guys
I just have a quick question for you guys... I have my converter tuned to not lock up in paddle mode, but it seems like the converter will never flash . Just curious, because this could fry a single disc converter at WOT... Anyone else notice this. I'm going to revisit my tune again tonight, but I could have sworn I set all the values for apply to 158....
Melting Slicks
Joined: Jul 2007
Posts: 3,097
Likes: 5
From: Brentwood World's first A6 in the 9's (including N/A, blower, turbo and nitrous cars) 9.950@139.267 CA
I just have a quick question for you guys... I have my converter tuned to not lock up in paddle mode, but it seems like the converter will never flash . Just curious, because this could fry a single disc converter at WOT... Anyone else notice this. I'm going to revisit my tune again tonight, but I could have sworn I set all the values for apply to 158....
Melting Slicks
Joined: Jul 2007
Posts: 3,097
Likes: 5
From: Brentwood World's first A6 in the 9's (including N/A, blower, turbo and nitrous cars) 9.950@139.267 CA
P.S. I also just responded to your PM.
Thread Starter
Drifting
Joined: Jun 2002
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Exactly.... I hit it once just to see how it was acting. I bet alot of people forget TUTD when they do the tuning....
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Thread Starter
Drifting
Joined: Jun 2002
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Meaning if you have a 3200+ converter and you nail it, it shouldn't grab until the rpm... When I hit it, it was grabbing at 1500-1800 rpms ....
Last edited by xstang; Mar 25, 2009 at 03:43 PM.
Melting Slicks
Joined: Jul 2007
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From: Brentwood World's first A6 in the 9's (including N/A, blower, turbo and nitrous cars) 9.950@139.267 CA
I just took a look at some of my scans and even with my 3600 the car starts moving well before it hits the rated stall speed.
Melting Slicks
Joined: Feb 2004
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From: Sugar Land TX
You should be able to footbrake to almost 3000 with a 3200 stall. Converter is locked if you only see 1500-1800 and moving.
Thread Starter
Drifting
Joined: Jun 2002
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Chris.... I guess what I'm trying to say if you drive your car with a stall at 5 mph and floor it in S or D, it will flash then catch at 3000+rpms before throwing you back. Now... do the same 5mph roll and floor it in paddle mode /watch the tach... It's not jumping the same way... That's how my car is currently working. I'm thinking the paddles are locking the converter.
Safety Car
Joined: Nov 2007
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From: Bethesda MD
Can you take off in 2nd or 3rd gear? If you have decent tires and start in a high enough gear with no spin, you should see pretty close to the true stall speed if you mash it.
Melting Slicks
Joined: Jul 2007
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From: Brentwood World's first A6 in the 9's (including N/A, blower, turbo and nitrous cars) 9.950@139.267 CA
I just got off the phone with Dave from Yank Performance (to double-check my facts before posting) and here’s how it works:
- The rated stall speed of a converter is known as the flash stall
- As a general rule of thumb, you should only be able to footbrake the car up to around 1000 RPM less than the advertised flash stall.
- How high you can footbrake the car may be slighly higher or lower depending on your tires, track prep and how good your brakes are.
- When the car starts moving the converter isn’t locked, but rather it’s “coupled up” which means that the internals of the converter have reached a point where the fluid will start turning the input shaft of the transmission and in turn, the wheels
Christopher
Melting Slicks
Joined: Jul 2007
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From: Brentwood World's first A6 in the 9's (including N/A, blower, turbo and nitrous cars) 9.950@139.267 CA
Chris.... I guess what I'm trying to say if you drive your car with a stall at 5 mph and floor it in S or D, it will flash then catch at 3000+rpms before throwing you back. Now... do the same 5mph roll and floor it in paddle mode /watch the tach... It's not jumping the same way... That's how my car is currently working. I'm thinking the paddles are locking the converter.
Does that sound like what might be happening?
If it's not, I just helped a guy with his tune earlier today and found out that it was set up all wrong so that might be the case with yours too.
If you want to e-mail me your tune I can take a look if you'd like.
Christopher
Melting Slicks
Joined: Feb 2004
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From: Sugar Land TX
Yes, that's how it worked for me and multiple PI converters over the past years. Obviously you do have to be able to hold traction, have brakes that hold just as Yank told you, etc. The torque your particular engine produces varies this rpm as well.
This is a PI converter and not a Yank. PI converters typically have a stall rpm more than a Yank rated the same. I've owned multiple PI concerters including a 3200. I could brake stall mine to over 2500 rpm on a good concrete surface.
This is a PI converter and not a Yank. PI converters typically have a stall rpm more than a Yank rated the same. I've owned multiple PI concerters including a 3200. I could brake stall mine to over 2500 rpm on a good concrete surface.
Thread Starter
Drifting
Joined: Jun 2002
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Ok, I went home and changed my apply settings to 158 for apply and left all the release speeds stock... It feels like it's flashing now. The only thing is, it feels like the paddle mode hits way too hard when you nail it. I might stay out of paddle mode all together. Has anyone figured out how to add in some torque management without the car acting too sluggish? 
Right now with TM removed /looser converter, it feels like it's going to snap my tranny in half every time I nail it! 
Right now with TM removed /looser converter, it feels like it's going to snap my tranny in half every time I nail it!
Safety Car
Joined: Jan 2008
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From: Middle of No where AK
Ok, I went home and changed my apply settings to 158 for apply and left all the release speeds stock... It feels like it's flashing now. The only thing is, it feels like the paddle mode hits way too hard when you nail it. I might stay out of paddle mode all together. Has anyone figured out how to add in some torque management without the car acting too sluggish? Right now with TM removed /looser converter, it feels like it's going to snap my tranny in half every time I nail it!
Right now with TM removed /looser converter, it feels like it's going to snap my tranny in half every time I nail it! That may not be the actual converter. That my be your shift pressure. If it is too high when the conveter engages it will give you a very firm shift. Basically feels like you got kicked in the pants.