351C/C6 Factory Performance Torque Converter |
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Ross6860
New Member Joined: 03-October-2012 Location: Ohio Status: Offline Points: 35 |
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Posted: 02-February-2016 at 11:21AM |
Posting here in the engine forum hoping someone knows the answer. I'm pretty sure Ford made a factory "high performance" torque convertor for the 351C/C6 combination. Anyone know for sure, and possibly a part number? Probably unavailable, but I'm hoping. My engine builder, and a build shop I trust, have both reported nothing but problems with the big name, not to expensive suppliers like B&M, Hughes, STI, etc. To the point they recommend having a new converter cut open and rebalanced before install, or buying from a reputable small shop in the first place. Multiple complaints pointing to the engine balance but turned out to be the TCs causing the problems. Anyone comment? |
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1974 Gran Torino
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6072 |
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the 1972 Cobra Jet converter is rated at approx 2600 rpm stall IIRC, it uses a unique flexplate & stud circle pattern. good thing I saved this pic member Kenneth posted to his project thread a while back because all his pics are lost
personally I wouldn't start fresh trying to find the 45 years old factory converter? surprisingly new flexplates are available though. I just ran across a converter thread here http://www.the351cforum.com/viewtopic.php?f=6&t=727 on the 2nd page they get to some good stuff, Kid Vicious / kv racing has been pushing Clevelands hard for a long time & he doesn't BS I'd just pay up & get what you pay for rather than paying for what you get Edited by Rockatansky - 02-February-2016 at 1:35PM |
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72 GT Ute
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mcford
Senior Member Joined: 31-May-2003 Location: Utica, Michigan Status: Offline Points: 2160 |
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72 is 2800 and it drops to like 2200-2400 for 1974. and like mentioned about, the stud pattern and flexplate are unique FOR THIS CONVERTOR,
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Mike
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MrSmog
Senior Member Joined: 21-January-2016 Location: Ky Status: Offline Points: 1407 |
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funny thing is, it wouldn't surprise me to find out Ford sourced that 2800 rpm converter from B&M or one of the other top tier aftermarket perf places back then lol Honestly it sounds like the engine builder is lookin for a "out" just in case there is a problem. |
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unlovedford
Senior Member Joined: 17-December-2010 Location: Tennessee Status: Offline Points: 10142 |
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Is he going to dyno the engine? If so, then the engine balance can be ruled out if there is a problem.
More often, it is the wrong flexplate, timing or wrong/bad harmonic balancer that causes vibration issues. I've had a couple of B&M convertors, and a few off-brand units and never had an issue...but have had issues with wrongly weighted flexplates and balancers not intended for the particular engine. Just because it "fits" does not mean it is right. |
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Joe
1972 Mom's Squire Wagon 1972 Torino Wagon 1976 Torino 1968 Cougar XR7-First batch 1972 Torino 460 1989 BroncoII/Jeeps/Titanimous Popeye and Brutus (Rams) |
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Ross6860
New Member Joined: 03-October-2012 Location: Ohio Status: Offline Points: 35 |
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There are several well thought of local shops, and only one that does balancing in-house. They also happen to be the local Ford "experts". So regardless which machine shop or builder you choose, unless they are sending your rotating assembly out of town, they all get balanced at the same shop. Considering the value of some of the builds going through these shops, I wouldn't assume they are covering their ass in advance. The two shops I dealt with have very good reps with the local "car craft" community. Restorers and racers alike. They aren't making a dime off of a TC, so why would give me a line? Hopefully I'll report back how it comes out. It's a 408 Cleveland going in that fat Torino in my Avatar. SCAT kit at just under 10:1. It's a street cruiser, not a race car.
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1974 Gran Torino
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6072 |
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408 with a 4" stroke should have plenty of bottom end grunt & shouldn't need to rely too much on a stall converter, you'll just be giving up usable rpm. same with the rear gear, the 4" crank arm will turn a highway gear with ease & you'll tach out lower all day long
unfortunately the very mild barely above stock stall converters usually end up being disappointments stock is around 1500 - 1700 BTW, a converter for a 6 cylinder or small V8 will have a slightly higher stall than the correct converter for a 351 or larger engine
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72 GT Ute
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mcford
Senior Member Joined: 31-May-2003 Location: Utica, Michigan Status: Offline Points: 2160 |
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just looked in my 1972 ford specifications manual and Fords rating on the 72 CJ torque convertor is 2750-2950 stal speed
Edited by mcford - 03-February-2016 at 12:33PM |
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Mike
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