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370 s91 th400 with a 3400 stall?

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Old Oct 31, 2011 | 10:20 AM
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Default 370 s91 th400 with a 3400 stall?

As my build gets closer to finishing up I need some advice on a stall converter. There is a rebuilt 3800 converter that was re-stalled to 3400 to make it tighter and I was wondering if this is the one for me. With my goal for the car is to make close if not a little over 1100rwhp, and will see some street action but more track time if anything. So any advice will be helpful as this is my first Turbo build.
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Old Oct 31, 2011 | 10:59 AM
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I was running a py3400 and it was a bit too loose for me at just under 800 rwhp. I'm gonna send it back to Yank and get it tightened for my next setup. Probably get it restalled to 2800-3000?

What size is the converter? (9.5" ?)
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Old Oct 31, 2011 | 11:07 AM
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I would go atleast 4400 with that big boy on a 370ci. A quality converter like an FTI will still feel tight at part throttle.
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Old Oct 31, 2011 | 12:23 PM
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Damn I should have kept my yank 4400 stall that I used for my nitrous set up then. O well, when I started this build my goal wasnt anything compared to what it has become. I was told a tight 3600 to 3800 stall would be the most sufficient about a year ago.
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Old Oct 31, 2011 | 01:11 PM
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Yes its a 9.5 I believe
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Old Oct 31, 2011 | 03:39 PM
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I'm running a py3400 and it is very tight at 832whp. I think that you will have a hard time spooling it though. Will prob want something in the 4000's. Dave@yank will hook you up. Your going to need an 11" converter for that kind of power.

Last edited by ls1curt; Oct 31, 2011 at 03:44 PM.
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Old Oct 31, 2011 | 08:19 PM
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Think ima be calling pro torque .... Fti quoted me almost 1500 for a converter and flywheel... Ive been hearing good things about pro torque but havent got any pricing yet .... Setup is almost identical to yours
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Old Oct 31, 2011 | 10:18 PM
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Ill take a look at them. Any other onions would be helpful.
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Old Oct 31, 2011 | 10:29 PM
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Originally Posted by 00ultraz28
Think ima be calling pro torque .... Fti quoted me almost 1500 for a converter and flywheel... Ive been hearing good things about pro torque but havent got any pricing yet .... Setup is almost identical to yours
Wow, that seems really high. Is that billet or something. For a 1Kish rwhp converter, it should be under $1,000 unless you asked for something really special that is not needed at that power level.
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Old Nov 1, 2011 | 08:48 AM
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Told em I had a 370 lsx with a th400 and planned to make 800 or so to them ground ... they qoted me 11 and some change for a spragless 3400 with a billet front cover and a 300 dollar flywheel ...f that ish
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Old Nov 1, 2011 | 10:06 AM
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Damn that is high
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Old Nov 1, 2011 | 10:14 AM
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Im runing a 408 with an s91 and my 4l80e with a tight ProTorque 3800 converter and I couldnt be more happier with it. It cost me about 850 or so and its worked great so far. Also if you would like to get another opinion on what converter to run ask Midwest Chassis what they run with
their s91 setup.
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