How does a higher stall converter work?
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: How does a higher stall converter work? (Stewart's74)
Converters also have and efficentcy rating. Your top of the line Art Carr, Protorq, Hughes, vigilante, just to name a few. High end units might have 96%+ the 4 % is lost to heat. Only lockup style converters can achieve @100%
High stall budget converters produce massive heat and without large coolers are bound to fail. They also cause the car to do many more rpm than necessary to maintain a constant speed on level ground Because they are not as efficient as the hi end models.
The correct way to determine the stall of converter you can use is. Your typical highway rpm. If your rear gearing and tire size makes you go above 2500 rpm at your hiway speed a 24-2500 rpm stall would be safe. You can’t run your vehicle in a steady state slip mode. The heat will ruin the tranny and gas mileage suffers. Your HP is making heat instead of propelling the car down the road.
The other area of concern is the diameter. You really want the smallest diameter(weight) for what ever stall you choose. I presently have a 9.5 3000 stall I have driven around with as much as 3800 stall converters they just require getting used to.
High stall budget converters produce massive heat and without large coolers are bound to fail. They also cause the car to do many more rpm than necessary to maintain a constant speed on level ground Because they are not as efficient as the hi end models.
The correct way to determine the stall of converter you can use is. Your typical highway rpm. If your rear gearing and tire size makes you go above 2500 rpm at your hiway speed a 24-2500 rpm stall would be safe. You can’t run your vehicle in a steady state slip mode. The heat will ruin the tranny and gas mileage suffers. Your HP is making heat instead of propelling the car down the road.
The other area of concern is the diameter. You really want the smallest diameter(weight) for what ever stall you choose. I presently have a 9.5 3000 stall I have driven around with as much as 3800 stall converters they just require getting used to.
Safety Car
Joined: Jan 2001
Posts: 3,569
Likes: 1
From: Hawaii
Re: How does a higher stall converter work? (gkull)
Your top of the line Art Carr, Protorq, Hughes, vigilante, just to name a few. High end units might have 96%+ the 4 % is lost to heat. Only lockup style converters can achieve @100%
The other area of concern is the diameter. You really want the smallest diameter(weight) for what ever stall you choose. I presently have a 9.5 3000 stall
The other area of concern is the diameter. You really want the smallest diameter(weight) for what ever stall you choose. I presently have a 9.5 3000 stall
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: How does a higher stall converter work? (Maurice)
http://www.bmracing.com
I couldn't find any E. ratings on their site - maybe contact tech support.
Here is all they have to say about the "Hole shot line"
A higher than stock stall speed as delivered by the Holeshot converter will provide several advantages and benefits in vehicles with modified engines. Many modifications, particularly big cams, tend to reduce low end power and torque. The high stall converter allows the engine to launch the car at higher rpm where more torque is available. The Holeshot is generally a very good choice for the typical street machine that is looking for better launch capability and more tractability. Street rods with modified engines will also benefit from a Holeshot converter.
Stall speed listings are based on engines producing 230lb. ft. of torque at 2,500 rpm. More torque at 2,500 rpm will give you more stall speed, less torque at 2,500 rpm will give you less stall speed than the stall speed ratings indicated.
Key Features
Furnace brazed impeller
New precision steel alloy pump drive tube
New heavy duty needle bearing between stator & turbine (not a thrust washer)
Needle bearing between stator & turbine
Furnace brazed turbine
Dual pattern drive lugs on some GM Holeshots
New turbine hub
New springs and rollers in stator
I couldn't find any E. ratings on their site - maybe contact tech support.
Here is all they have to say about the "Hole shot line"
A higher than stock stall speed as delivered by the Holeshot converter will provide several advantages and benefits in vehicles with modified engines. Many modifications, particularly big cams, tend to reduce low end power and torque. The high stall converter allows the engine to launch the car at higher rpm where more torque is available. The Holeshot is generally a very good choice for the typical street machine that is looking for better launch capability and more tractability. Street rods with modified engines will also benefit from a Holeshot converter.
Stall speed listings are based on engines producing 230lb. ft. of torque at 2,500 rpm. More torque at 2,500 rpm will give you more stall speed, less torque at 2,500 rpm will give you less stall speed than the stall speed ratings indicated.
Key Features
Furnace brazed impeller
New precision steel alloy pump drive tube
New heavy duty needle bearing between stator & turbine (not a thrust washer)
Needle bearing between stator & turbine
Furnace brazed turbine
Dual pattern drive lugs on some GM Holeshots
New turbine hub
New springs and rollers in stator
