High Stall Converters and Highway Driving???
#865129
11/27/10 11:16 PM
11/27/10 11:16 PM
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Joined: Jan 2003
Posts: 5,186 Wherever I am.
Junky
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,186
Wherever I am.
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I get tired of conflicting info. I've read on here that it's fine to run a tight converter rated at 3000 stall on the streets, roads and highways. Talked to someone today about running a TC with about 3000 stall who said that it would be too high for highway driving. That it would generate too much heat. That I should keep it down to no more than a 2500 stall TC. This person has been racing and custom building engines for like 40 years. I'd like input from you all about this subject. I'd like to run a 3000 stall TC. I'm running a 727 with 3.73 gears. The cam would love it.
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Re: High Stall Converters and Highway Driving???
[Re: Junky]
#865131
11/27/10 11:25 PM
11/27/10 11:25 PM
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Joined: May 2003
Posts: 6,562 Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,562
Downtown Roebuck Ont
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Your friend is still stuck in the sixties. I'm running a 4800 lb C-body with a 493 727 3000 Turbo Action converter with 3.23 gears. ZERO problems. Install a good quality trans cooler and enjoy. With 3.73's it would be locked up freeway speeds anyway. Kevin
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Re: High Stall Converters and Highway Driving???
[Re: Junky]
#865132
11/27/10 11:25 PM
11/27/10 11:25 PM
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Joined: Jul 2003
Posts: 6,167 Maryland
GO_Fish
master
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master
Joined: Jul 2003
Posts: 6,167
Maryland
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you'd need to do some calculations, including exact tire height and rear gear ratio. As long as your highway RPM's are higher than your stall speed, you will not generate excessive heat. I.E. Highway RPM's at 3500, not so much heat. Highway RPM's at 2500, there would be heat caused by slippage in the converter, and more heat generated as RPM's decrease. Install a big trans cooler and go for it!
Shop carefully for your converter. They will need all kinds of precise information to get you the right converter (it must work with your cam selection for optimum results). If you provide them with bad info (or they never ask for detailed info) you will not get the full bang for the buck and may be unsatisfied. The wrong converter can make the car a dog!
Scott B.
"I'm a self-made man... I started with nothing, and I still have most of it!"
68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph
69 340 GTS stock 14.18@ 95.60 mph
01 5.9L Ram 1500 Quad Cab 4x4
01 3.5L 300M 16.23@ 86.97 mph
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Re: High Stall Converters and Highway Driving???
[Re: Junky]
#865134
11/27/10 11:28 PM
11/27/10 11:28 PM
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Joined: Jan 2003
Posts: 5,443 Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,443
Indiana
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I agree with the above posters on running a quality unit PLUS a tranny cooler. I run a TA 10" tight unit now for 5 years on the street with 3:91's and 27" tires (3500rpm unit) and no problems so far. I also have a temp gage so I can watch the running temp of the tranny with the converter. Call Paul Forte at Turbo Action and he will ask for all of your info. Junky: With your new cam, I would bet that you won't be able to wipe the smile off of your face if you went with a 3k+ converter. With all of the bolt on items that I have thrown onto my car in the last nine years(5 carbs,2 intakes, 2 cams, 2 ignition systems, even 340 HP manifolds to TTI headers[second place!]), this 3500 converter is by far the most "seat of the pants" improvement that I have seen.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: High Stall Converters and Highway Driving???
[Re: Twostick]
#865136
11/28/10 12:04 AM
11/28/10 12:04 AM
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Joined: Jan 2003
Posts: 20,177 Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,177
Park Forest, IL
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Unless you are really on the throttle the converter will be pretty much locked up anyway. (At least as locked as it will get)
"Everybody funny, now you funny too."
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Re: High Stall Converters and Highway Driving???
[Re: slantzilla]
#865137
11/28/10 12:35 AM
11/28/10 12:35 AM
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Joined: Jul 2003
Posts: 6,167 Maryland
GO_Fish
master
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master
Joined: Jul 2003
Posts: 6,167
Maryland
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my understanding is the better converters slip less under light load than "budget" converters. My 9.5" Dynamics converter has a noticeable slip pulling away from a stop sign at light throttle, but by 15 mph or so, it is not noticeable. For the most part, you usually get what you pay for with converters. Not to say that some brands may be over or under rated.
Scott B.
"I'm a self-made man... I started with nothing, and I still have most of it!"
68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph
69 340 GTS stock 14.18@ 95.60 mph
01 5.9L Ram 1500 Quad Cab 4x4
01 3.5L 300M 16.23@ 86.97 mph
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Re: High Stall Converters and Highway Driving???
[Re: crlush]
#865140
11/28/10 01:27 AM
11/28/10 01:27 AM
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Joined: Aug 2003
Posts: 11,179 Atco NJ
DJVCuda
I Live Here
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I Live Here
Joined: Aug 2003
Posts: 11,179
Atco NJ
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the fin pitch, stator design and construction can essentially make a smaller diameter converter flash AND become efficient at speeds... picture a pinwheel behind a fan - one will push the other and it will eventually get close to the same speed. That is a positive pitch on the fins, the old school way to get stall was to put a negative pitch, and it would work against itself never getting efficient. Not anymore. I put this together a few years ago - might be worth the read. April / May 2008 Mopar Enthusiast Magazine - Talking Torque Converters
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Re: High Stall Converters and Highway Driving???
[Re: Junky]
#865143
11/28/10 05:20 AM
11/28/10 05:20 AM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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I have been driving my 63 on the road since 2006 with a 9.5 Dynamic converter that flashes about 4200. I drive the highway all the time along with the back roads. I drove it to Carlise going up 83 at 60 mph all the way taching about 3300. Its about 90 miles one way. I have not had any problems in my 63 or my boys Dart that has been on the road since 1997 and also has a 9.5 Dynamic unit. See here I am at Carlisle. Ron
Last edited by 383man; 11/28/10 05:22 AM.
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Re: High Stall Converters and Highway Driving???
[Re: 383man]
#865145
11/28/10 07:35 AM
11/28/10 07:35 AM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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here's my understanding of the topic.
New, high quality torque converters are good for the street, AND will still stall high on the track for good ETs.
remember, it's a TORQUE converter. TORQUE being the key word, not "RPM"
the more torque you put into it, the more it will slip. at maximum torque, you'll get maximum slippage, up to the stall point.
under part throttle, light load cruising, your not really making any torque, and that "high stall TC" is not slipping excessivly --again, at part throttle cruisng.
**Photobucket sucks**
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