View Full Version : Stall Converter for a '67 RT Coronet

07-12-2006, 11:49 PM
For this engine, what kind of stall speed is good for this combo?
'67 440 (.030 over) Stock compression (10.5:1?). The cam is a MOPAR Purple Shaft cam pn#5007697
Advertised duration:284/284
@.050: 241/241
I think it has "hemi?" springs
915 Casting# closed chamber heads with 2.14/1.81 stainless valves installed.
Freinds dad wants it as "streetable" as can be, close to stock manners as possible. (wants to leave the motor as is if possible, his kid, or my best freind built it before he passed in December).
He is in the process selecting torque converters, wants to know ideal stall speed for converter. He wants to try to stick to Mopar performance, but throw out other suggestions.
the car is equipped with a 727 Tourqueflite, freshly built with a TransGo TS2 shift kit.
Lemme know what will work ideally with the combo, thanks in advance!:thumbsup
-Kevin M

07-12-2006, 11:55 PM
Dusting the cobwebbs off of this forum!!!!!!

Prince Valiant
07-13-2006, 08:10 AM
It's very important to know what gears he's running, and the basic tune, carb, and intended useof the car before making the best recommendation. But in my opinion, I'd think a good stall speed for this combo would be about 2600-2800rpm for a more street oriented car...best would be around 3200rpm...as far as who to go to specifically for the converter, that's hard to say. I'd probably look for speciality converter builders and take the combo to them (you can find them advertised in mopar mags, forums, etc). They'll certainly want more info too.

07-13-2006, 05:26 PM
I don't know the answer to this question, but it is pretty cool to see a thread with 67 R/T in the title!
Lets see some pics of this thing, and of your 68 :confused :shades

07-13-2006, 05:34 PM
Do not worry, i am not another grim.......

07-13-2006, 08:29 PM
Do not worry, i am not another grim.......

I didn't mean it like that, I just like old Mopars! :drool: :thumbsup

07-13-2006, 09:28 PM
I didn't mean it like that, I just like old Mopars! :drool: :thumbsup

Me too! My mom had a 68 R/T as her first car and my dad ran one of the few competitive Mopars on the local dirt tracks in the 70's... :headbang

07-31-2006, 10:22 PM
He bought a converter....thanks!

08-05-2006, 07:17 PM
When and if this guy ever decides to step on this thing harder, he will want a 9 inch converter, something along the lines of the Turbo Action 17509J. This is the famous "J" converter you might have heard about. It's an expensive converter, but IMO, well worth it.

I've run one 10 inch converter (B&M), two 9 inchers (1 TCI, 1 Dynamic), and one 8 inch (Munsinger), and the fastest my car ever ran was on the 9 inch converters. I think that the efficiency of that size converter complements the torque curve of a big block Mopar wedge. When I had my B1 in my Road Runner, I switched from the Munsinger 8" which had a 6000 rpm stall on the brake to the Dynamic 9". The stall on the brake remained the same, but with no other changes, my finish line rpm dropped from 7300 to 6700 with no loss in ET or MPH. That's REALLY efficient because the Munsinger was fairly efficient, at least for an 8". The rpm drop gave me some breathing room for when I sprayed the car...;)