Torque Converters

Run a stock converter. OR at the very most, a factory high stall, which is generally about 1000 RPM over stock. In reality, your combo will run better with the stock converter.

First, you need to realize that Chrysler products differ from any of the other domestic makes in this area. Stock Chrysler converters have a stall speed of around 1300-1800 RPM. The factory high stall about 1000 over that. Chrysler knew that a higher stall speed would aid in giving their cars a more snappy feel and better acceleration with highway gears.

Your engine will be very mild with the Comp 268 camshaft. Keep in mind when Comp says "Will work with stock converter but a mild stall will help" that is a blanket statement. In comparison to other makes, your STOCK converter is ALREADY a mild stall. Putting more power and torque into your engine will make the stock converter stall even a little higher. That's how converters work. The more torque they see, they higher they stall.

With your mild engine and mild 3 series gears you are talking about, IMO going to even a mild stall above the stock converter will be a mistake. You will lose some snappiness right off the line, in favor of launching at a higher RPM that's really not needed. It will do this because a higher than stock stall converter will be locked up LESS right where your engine will be wanting to pull.......just off idle. If you had 3.55-3.91 or lower gears, this effect would not exist. Also, with highway gears and a higher than stock stall (remember the 1300-1800 IS stock) your converter will not be engaged its fullest at highway speed. Converters are never fully engaged unless they are a lockup, but you will lose more engagement because of the highway gear. That will cost you fuel mileage and possibly increase heat in the transmission.

The converter stall flash is described in the MP manual like this. It can only be measured really accurately with a manual valve body, but you can get a general idea with an standard valve body. The MP book says to put the car in D (high gear with a manual valve body) apply the parking brake and hold your foot on the brake pedal. Gently depress the gas pedal until the tach STOPS rising. This is your true converter stall speed.

However, that really doesn't hold AS true as it once did, because converter technology has come light years since that information was published. It is possible with modern converter technology to get a converter that will flash to 5K RPM and still maintain good enough engagement to drive on the street. There's a down side. They are expensive. Also, you do NOT need such a converter on a street build as mild as yours. IMHO, a stock Chrysler converter is a good match for your combination up to a 3.23 gear. If you go to a 3.55, then you can step up to the factory high stall. I think if you use a stock converter you will be very happy. The converter will be RIGHT THERE at the beginning of the cam's torque curve. That's just my opinion. I am sure others will argue.