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#1
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New stall converter feels slugish
Hopefully someone can help me out here. I recently had my 518 tranny get a performance rebuild. In the process, I upgraded the converter to a higher stall speed. The stock converter stalled at 1700RPMs where as the new one stalls at 2100RPMs. It used to be snappier off the throttle than it is now. My question is if this is normal with a higher stall converter? If so, how will this equate into better 60ft times? I guess I expected something a little different than what I got.
I AM HILLBILLY |
#2
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The converter's not made by GER is it?
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#3
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No, its Mopar performance.
I AM HILLBILLY |
#4
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It all depends how hard you stand on it. I used a 3500 TCI race converter on the street for 2 years. Anymore than 1/8 throtle and it would hit stall speed. So part throtle bursts were sad, but when you stood on it, it would rip the tires off it. When you have a real tight converter it will feel very responsive cause it jumps when you just touch the gas. If you use a stall converter and don't need it it will hurt performance. My friend went from a stock one to what I had and he lost 5 mph in the quarter, but ran same et, so he changed back. Have you checked the stall? Just load it up in final gear, but only a few seconds cause the heat generated is bad. My TCI stalled at 4000 and my new tight converter is 3000.
Remember the stall converter is made to get the engine into a certain rpm range when you do a full throtle launch. The converter will slip until it hits stall speed. |
#5
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With the old converter, I could smoke the tires at will. Wih the new one, no matter how I launch, even at full throttle, it takes off like a slug. I'm not sure it's locking up right. With the stock one, I could feel it lock up and take off, the new one doesn't give that feeling. Also, the shifts are really pretty tame for having a transgo kit reworked for race shifting. It actually shifted harder before when I had the kit set up for heavy duty usage with the exception of when I wind it out manually to 5500RPMs and hit 2d. That's the only time it will hit hard. If the torque converter is bad or slipping, would it affect the shifts also?
I AM HILLBILLY |
#6
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I don't think the converter would affect the shift. That is between the tranny and engine so it could steal power but the tranny should still shift hard. Maybe the Tranny is slipping. Have you talked to the shop that did the tranny? I have never had this prob.
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#7
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The higher the stall the softer the shift.
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