Right torque converter

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Dalton697

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Okay I'll admit I'm a little new to the automatic world, I have a 74 dart sport 360 when I pulled the transmission due to leak I was told the torque converter was bad which it is bad pretty grooved up on the outside shaft, but it was a 12" converter and I'm told it should be an 11", curious what the different is and I'm in the process of rebuilding the 360 .30 over with .454/475 lift cam with .256/262 duration 2.02 intake valves and 1.60 exhaust, header, weiland dual plane intake and edelbrock carb. The car has 8 3/4 with 3.55. This will be pretty much just street machine but may see 1/4 turn every now and then and was wondering what type of stall to use with this
 
.............stall speed will be higher on a smaller converter, u may also need to change the flex plate to match the converter...i would recommend putting in a front bushing as well as the front seal in the trans.....kim,...........
 
It should be a rule posted on this fourm:

All mild street machines run 2500ish stall.


Here is a link to back it up:

http://www.hardtail.com/techtips/selectingconverter.html



"Here are some general guidelines for selecting a converter:

According to B&M, the stall speed should be rated at about 500-750 RPM under your engine's peak torque RPM. If you don't know this figure, be conservative in your estimate. You don't want to end up with a converter that has too high of a stall speed. Don't be too conservative, though - it is possible to get a converter with too low of a stall speed, which will have roughly the same effect as too high of a stall speed.

Know your camshaft specifications. If your cam has less than 220 degrees duration (@ 0.050" lift), which most street machines do, you make most of your torque down low in the RPM range, and you probably won't need more than a 2500 RPM stall speed, if even that much.

Have a good idea of your vehicle's weight. Remember, lighter vehicles will lower the rated stall speed; heavier vehicles will have the opposite effect.

High stall converters generate a lot of extra heat. The installation of an external transmission cooler is mandatory with a higher than stock stall speed converter. Actually, you should have one in there anyway. Heat is the number one killer of transmissions - 85% of all trannies die because of inadequate cooling.

The best advice I can give anyone buying a converter is to talk to the manufacturer. They know torque converters better than anybody, and can help you to select exactly the right converter for your combination. This article was designed to give you some insight into what is needed to determine the right converter, and to make you familiar with the terms and what you need to know to speak intelligently with the experts."


Sticky that. Your welcome.
 
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