Torque Converter Questions

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cr_bobcat
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Torque Converter Questions

Post #1 by cr_bobcat » Mon May 15, 2017 2:19 pm

So the build is listed in my footer. I have a C4 with the 26 spline shaft out of a '71 Mustang with a 250. I've previously been corrected that I will not be able to use the 250 converter on my 200. So I'm left to use the converter out of my 67 or order a new one. My gut feeling tells me that I'm up a creek on the existing converter as it's probably a 24 spline unless I'm uber lucky and someone swapped out the original trans sometime before I got the vehicle.

Where is a good source for a converter that has a higher stall speed for my application? I don't want to order something then end up a creek.

Thanks in advance! :beer:
Block: Stock C8 Block/pistons, C9-M head, 1.75/1.5 valves, dual spring, 1.65 RAU Rockers, port divider, direct mount Holley 4412-500, HEI w/20* advance, manifold vac, dual-out Arvinode exhaust, Clay Smith 264/274 110* installed w/ 4* advance, adjustable dual chain timing, C4 w/ shift kit, 3.20 (TBC) rear ratio, 9.44 SCR / 7.97 DCR

Build that Six with parts from http://www.vintageinlines.com

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cr_bobcat
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Re: Torque Converter Questions

Post #2 by cr_bobcat » Mon May 15, 2017 2:23 pm

To be clear, I'm rebuilding the '71 C4 so that I can hot swap in the existing trans.

I called a local shop here today and they want about $900 to rebuild a C4. I talked them down to $400-500 since I already have the '71 trans broken down and already have the rebuild kits, including transgo shift kit. Basically it's going to be the labor to inspect what I have and rebuild it.

I'm trying to figure out what I'm getting myself into prior to dropping the thing off and digging myself too deep into a money pit...
Block: Stock C8 Block/pistons, C9-M head, 1.75/1.5 valves, dual spring, 1.65 RAU Rockers, port divider, direct mount Holley 4412-500, HEI w/20* advance, manifold vac, dual-out Arvinode exhaust, Clay Smith 264/274 110* installed w/ 4* advance, adjustable dual chain timing, C4 w/ shift kit, 3.20 (TBC) rear ratio, 9.44 SCR / 7.97 DCR

Build that Six with parts from http://www.vintageinlines.com

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bubba22349
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Re: Torque Converter Questions

Post #3 by bubba22349 » Tue May 16, 2017 11:17 am

Are you wanting to use a stock stall converter or are you looking for one that's a more Performace version? You can maybe still use your existing convertor just swapping in the correct input shaft. Otherwise you can order a rebuilt 1971 Maverick / Comet 200 C4 torque convertor. Good luck :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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cr_bobcat
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Re: Torque Converter Questions

Post #4 by cr_bobcat » Wed May 17, 2017 9:30 pm

I want something with a higher stall. The car is slow out of the shoot but then kust wants to run run run.
Block: Stock C8 Block/pistons, C9-M head, 1.75/1.5 valves, dual spring, 1.65 RAU Rockers, port divider, direct mount Holley 4412-500, HEI w/20* advance, manifold vac, dual-out Arvinode exhaust, Clay Smith 264/274 110* installed w/ 4* advance, adjustable dual chain timing, C4 w/ shift kit, 3.20 (TBC) rear ratio, 9.44 SCR / 7.97 DCR

Build that Six with parts from http://www.vintageinlines.com

OpelGT+3point3
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Re: Torque Converter Questions

Post #5 by OpelGT+3point3 » Thu May 18, 2017 1:15 am

Does the new trans have the same shifter arm as the old one? Am I correct to understand that you have a 2.7 rearend ratio?

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cr_bobcat
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Re: Torque Converter Questions

Post #6 by cr_bobcat » Thu May 18, 2017 10:33 am

I have no clue on the shifter arm. I'm a complete noob when it comes to transmissions so I don't know much here. I've not pulled the one in the car.

The 2.7 was based upon what I read from the door tag. I've not jacked the car up and counted revolutions to confirm. I know that I have a 18-20% error in my speedo reading. So I don't know exactly what rear end I have for sure. I suppose I could also just take note of what my RPM are when doing 60 and run that through one of the online calculators too.
Block: Stock C8 Block/pistons, C9-M head, 1.75/1.5 valves, dual spring, 1.65 RAU Rockers, port divider, direct mount Holley 4412-500, HEI w/20* advance, manifold vac, dual-out Arvinode exhaust, Clay Smith 264/274 110* installed w/ 4* advance, adjustable dual chain timing, C4 w/ shift kit, 3.20 (TBC) rear ratio, 9.44 SCR / 7.97 DCR

Build that Six with parts from http://www.vintageinlines.com

OpelGT+3point3
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Re: Torque Converter Questions

Post #7 by OpelGT+3point3 » Thu May 18, 2017 5:28 pm

The shifter arms can't be changed from the outside. Remove pan, valve body, 7/8" nut. Not fun from underneath. So it won't be a "hot swap". A 2.7 rearend will be a dog off the line. Maybe a 3.7 or thereabouts. I wouldn't want anybody to bring me a disassembled trans because I would have to put it together before I could determine end play tolerances and selective washer choice. But most shops just put the same washers back in anyway. Consider removing the two front drums only and leave everything intact behind the snap ring on the out shaft. And just do it yourself. Not too difficult until you dismantle every little part then try to make sense of it.

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cr_bobcat
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Re: Torque Converter Questions

Post #8 by cr_bobcat » Fri May 19, 2017 3:35 pm

I checked my door tag today. It says that i have a 2.83 rear. My speedometer is off by 18% or so though. I could actually have a different rear. I'll try to investigate. I'll get the rear end jacked up and look for a tag. I'll also try counting rotations while spinning the shaft.
Block: Stock C8 Block/pistons, C9-M head, 1.75/1.5 valves, dual spring, 1.65 RAU Rockers, port divider, direct mount Holley 4412-500, HEI w/20* advance, manifold vac, dual-out Arvinode exhaust, Clay Smith 264/274 110* installed w/ 4* advance, adjustable dual chain timing, C4 w/ shift kit, 3.20 (TBC) rear ratio, 9.44 SCR / 7.97 DCR

Build that Six with parts from http://www.vintageinlines.com

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bubba22349
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Re: Torque Converter Questions

Post #9 by bubba22349 » Sat May 20, 2017 9:18 pm

cr_bobcat wrote:I want something with a higher stall. The car is slow out of the shoot but then kust wants to run run run.


You might contact site member Crosely to see if he has a sorce for a higher stall converter. Good luck :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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cr_bobcat
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Re: Torque Converter Questions

Post #10 by cr_bobcat » Sun May 21, 2017 5:22 pm

I'll dig into it a bit. I've heard that there is a very competent shop here in Iowa up in New Hampton. I might be able to send my original up there for a rebuild.
Block: Stock C8 Block/pistons, C9-M head, 1.75/1.5 valves, dual spring, 1.65 RAU Rockers, port divider, direct mount Holley 4412-500, HEI w/20* advance, manifold vac, dual-out Arvinode exhaust, Clay Smith 264/274 110* installed w/ 4* advance, adjustable dual chain timing, C4 w/ shift kit, 3.20 (TBC) rear ratio, 9.44 SCR / 7.97 DCR

Build that Six with parts from http://www.vintageinlines.com

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bubba22349
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Re: Torque Converter Questions

Post #11 by bubba22349 » Mon May 22, 2017 12:49 am

If I remember right I think Crosley stated in one of his posts that he used the six convertors bottom half and swapped out the top half for a Pinto and modded the fin angle to increase the stall. Good luck :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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cr_bobcat
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Re: Torque Converter Questions

Post #12 by cr_bobcat » Mon May 22, 2017 8:29 pm

Did some maths today to try to figure out my rear end. I measured my tires at roughly 24.5" tall. Took a picture of my tach/speedo. My speedometer was reading 46-47 mph and tach sitting around 1600. Figuring in for the 18% error in my speedometer reading, it looks like I might have a 3:20 rear ratio. The car will be up on a lift tomorrow to get the exhaust installed. I asked the to snap pictures of the rags on bith the trans and the rear end. Might finally solve one mystery....
Block: Stock C8 Block/pistons, C9-M head, 1.75/1.5 valves, dual spring, 1.65 RAU Rockers, port divider, direct mount Holley 4412-500, HEI w/20* advance, manifold vac, dual-out Arvinode exhaust, Clay Smith 264/274 110* installed w/ 4* advance, adjustable dual chain timing, C4 w/ shift kit, 3.20 (TBC) rear ratio, 9.44 SCR / 7.97 DCR

Build that Six with parts from http://www.vintageinlines.com

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Re: Torque Converter Questions

Post #13 by 64falconsix » Tue Jun 20, 2017 1:26 pm

Just tested the custom converter I had built by Champ converters In Evansville IN. After sending the Info on my build they asked for,.... Bob Steckler the owner called and said I would need a 2,000 to 2,200 stall speed.... they delivered with 2,100 stall ......the turnaround was 7 days and just over $200.00 with a new stator and ring gear including shipping.....the difference in off the line performance is like night and day.......
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64 falcon 2dr 200 C.I. .040 decked ,comp. 260 .440, C.I. adjustable timing chain w/ 79 log head 52.cc , offy w/ triple webers , Clifford header , D.U.I. , C/4 2,200 stall , Transgo Stage 2 reprogramming kit , 7 1/4" with 3.20 gears. NX, N2O 75HP shot.

10.29@ 61.91 M.P.H. in the 1/8th mile. 4/12/13

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bubba22349
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Re: Torque Converter Questions

Post #14 by bubba22349 » Tue Jun 20, 2017 3:16 pm

:beer: Congrats on finding a good source for your needed higher stall convertor, sounds like you also got a great deal with quick service also. Good luck :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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