Highway driving with high stall converter

[mferraro76]

If i go with higher stall, lets say 2400, and am doing 50 mph, my rpms are lower than the stall speed (using rpm calculator). at 70, i will be above stall (around 2800 rpm) so what will it be like, driving 50mph?

say later, i want to add overdrive, will i need to swap in a lower stall converter?

 

[ga66mopar]

I'm running a 11 inch 2400 stall converter in my 66 and the only time I can tell it has a stall is when I first take off. There's no surging at highway speeds. I think it really maters what size converter you have as far as diameter . If you run a 9 inch 2400 stall converter it will surge more on the highway than say a 11inch 2400 stall converter. This has been my experience anyway.

 

[70rr-brian]

I run a 4000 stall on the street. The main place it gets me is when I am in second gear at low RPM's, or 3rd gear and low RPM's and don't want to mash the accelerator past the stall speed. The easing up to speed with a stall this high is annoying to say the least. Mine will have to jump 1k in RPM just to feel it move if I am in the 2k RPM range. But the stall you are talking about should not even be noticable IMO. Unless you are running a 2.xx rear gear ratio.

 

[mferraro76]

I'm running a 11 inch 2400 stall converter in my 66 and the only time I can tell it has a stall is when I first take off. There's no surging at highway speeds. I think it really maters what size converter you have as far as diameter . If you run a 9 inch 2400 stall converter it will surge more on the highway than say a 11inch 2400 stall converter. This has been my experience anyway.

what size tires do you have? what are your rpms going 65-70?

 

[2dht]

I have 2800 stall. Rear ratio is 3,91. Car is in everyday use and no problemo.

 

[ga66mopar]

what size tires do you have? what are your rpms going 65-70?

I'm running a 323 gear with 235 70 15 rear tires. I don't have a tach but at 70 mph it's turning around 2700 rpm give or take 100 rpm either way.

 

[Southernman]

You mentioned that you would later like to add an "overdrive" trans.

IMHO, if moneys of no concern, the 2400 you referenced will not be a problem. Many of todays street/strip converters stall at considerably less than the advertised numbers and cruising with anything up to a 3800 converter (3.,91 gear minimum) has never been a problem for me.

If money is a concern, hold off on the converter purchase for the OD trans, as you'll probably be looking at a stall converter that is capable of "locking up" in high gear. It sounds like you're running a "non lock up" converter now.

Southernman

 

[mferraro76]

ga66mopar - thanks for the info

Southernman - OD...later on maybe something like a gear vendor. don't want to hack things up to fit the OD tranny. i will prob keep the 727.

 

[Meep-Meep]

I'm running a TCI 2400 in my 66 Bel with 3.55's and 235 70 15's and it seems to be fine. My speedo is waaaay off so I have no idea what's going on but I know I'm turning 2800 RPM and passing semis. 3400 RPM and I'm running right along with traffic if not faster than most.