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Old 08-08-2007, 06:01 PM
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Torque converter question

My 83 Silverado has a 355 sbc and a th350 trans in it. The torque converter I bought(and I probably shouldn't have) was supposidly a knock-off B&M with a 2200 to 2400 stall. It never has stalled out at all and works like a stock converter. Could a faulty converter cause a torque loss off the line? I don't know how the inside of these things work. Seems like my power isn't getting back to the wheels.
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Old 08-08-2007, 06:15 PM
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How is that 355 built? Has it been on a dyno? It won't stall if the engine doesn't have the power and an engine with more torque will make the same converter stall higher.
It all needs to match the total package-engine, rear gears, weight...etc.
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Old 08-08-2007, 06:42 PM
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I'm in the middle of a head change but I had 461 heads on it, xe268h cam, performer rpm intake, 650 dp, and an eagle bottom end with flat top pistons. It's in a 83 4X4 truck with 3.08 gears and 31" tires. I would think I would at least be able to stall this converter out. I've played with timing and still no tire fire. Just read an article in knowledge base and now feel like a dumb@$$ for asking my question.
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Old 08-08-2007, 08:43 PM
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Stall speed may be too high.
Shane
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Old 08-08-2007, 08:55 PM
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Regardless of anything else, you really should have 3.73 gears with those 31" tires.
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Old 08-08-2007, 10:29 PM
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What do you mean you cant stall the converter out?? Where ever the RPM sits when you do a brake torque IS the stall speed. Either it's stalling to high or too low. Which is it?
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Old 08-09-2007, 05:47 PM
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Its not stalling at 2200 to 2400 rpm, more like 1200 rpm. I want to do 3.73's gears but time and cash are coming short so it'll have to wait. I bought the 2200-2400 stall so I could get more power off the line but since it's not stalling out all the way it's supposed to I can't even break tire, 2500rpm and above it really pulls hard. Gears are killin me, I can go 65 mph in first gear!!!!!
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Old 08-09-2007, 07:23 PM
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Either of two things will cause a low stall. Bad converter or not enough power to "push" the converter into stall speed. Gears will affect your launch but have nothing to do with stall speed.
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