converter stall speed question
Thread Starter
Safety Car
Joined: May 2005
Posts: 4,176
Likes: 7
From: Jennings LA
converter stall speed question
I have to set the idle on my new 383 to 1600 in park so it will idle at 800 in gear. it has the factory torque convertor 1981 / turbo 350
with lock up. will a 2500-3000 stall convertor affect my idle speed? I hate for it to idle that fast in park. cam powerband is 2500-6000
with lock up. will a 2500-3000 stall convertor affect my idle speed? I hate for it to idle that fast in park. cam powerband is 2500-6000
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
If you have that much of a differential between gear and park idles, I wonder if you have a vacuum leak>?
My 383 has a mild cam but that's not why I chose to get a stall convertor...I just wanted it to take off outta the hole like a Vette should. At low RPM the convertor just slips, so it can't affect your idle speed.
My 383 has a mild cam but that's not why I chose to get a stall convertor...I just wanted it to take off outta the hole like a Vette should. At low RPM the convertor just slips, so it can't affect your idle speed.
Melting Slicks
Joined: Jan 2004
Posts: 2,672
Likes: 1
From: New Cumberland PA
Originally Posted by Ironcross
A correct converter with a solid lifter engine should idle at around 800-850 rpms both in and out of gear. With a hydraulic cam, 600 would be acceptable both in and out of gear.
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
Originally Posted by mandm1200
I believe this in regards to an auto, not a manual tranmission. I never seen an auto that did not decrease in rpm when it was put in gear.
Mine do. in gear or out, same speed and all solid lifter engines. They will creep in gear but slight brake pressure controls that.
Melting Slicks
Joined: Jan 2004
Posts: 2,672
Likes: 1
From: New Cumberland PA
I'm not sure why lifters would have any affect. When it is put in gear, the tranmission puts some stress on what was a free wheeling engine. That's why you got to put your foot on the brake. Putting some stress on the engine will cause it to drop in rpms. A higher stall converter will slip more at lower rpms allowing a decrease between the idle speed in nuetral and the idle speed in gear.
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
Originally Posted by mandm1200
I'm not sure why lifters would have any affect. When it is put in gear, the tranmission puts some stress on what was a free wheeling engine. That's why you got to put your foot on the brake. Putting some stress on the engine will cause it to drop in rpms. A higher stall converter will slip more at lower rpms allowing a decrease between the idle speed in nuetral and the idle speed in gear.
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