Duramax Diesels Forum Truck of the Week
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Old 09-04-2019, 02:48 AM
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Default 4l80E Stall Rpm

Any ideas where to go for a Torque convertor for 4l80e, What stall rpm I should shoot for? I have a 800-900hp twin turbo-60% injector setup in 4000lb car. Have a pro torque 1800-2000 that is Flashing 3700 now which is to high, they say they can not go any tighter, like to shift 4000rpm.
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Old 09-04-2019, 10:48 AM
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rfletes79 rfletes79 is offline
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I can get them build here locally out of Sacramento. He does the one in my chevelle and has done several for the 4l80 as well.
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1970 Chevelle Duramax Hot Rod, '04 LB7/TH400-gear vendor, HTT 67.7 FMW, Wagler street intake, 65% S&S sticks, exergy 12 mil pump, SoCal AF3388, Valve springs, Push Rods, LBZ rods, cut LB7 slugs..... 9 sec cruzer :-)


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Old 09-04-2019, 11:14 AM
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What is your valley charger? That is pertinent information for any stall recommendation. I don't have any 4L experience but that info will better help anyone else give you better options.
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1488 hp/ 2239 tq. @ SDX '19
- Tune 2 400% FUEL ONLY



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Old 09-04-2019, 04:53 PM
onebaddmaxxx onebaddmaxxx is offline
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What size converter is it? The one in our race truck is built off a 13" converter not a small 245mm or 278mm like most probably would build it as. Suncoast did ours its a 1055-2 with an 80 hub welded to it basically. (2500-2600 stall) but the 13" converter is where its at. with a single 76mm and big fuel it stalled perfect and had no where of the flash yours did. If you have any questions feel free to PM me...
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Old 09-09-2019, 02:55 PM
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Quote:
Originally Posted by Average_Ass_Lb7 View Post
What is your valley charger? That is pertinent information for any stall recommendation. I don't have any 4L experience but that info will better help anyone else give you better options.
Its is a Borg Warner S366SX-E Super core. S480 Billet pushing. I can Hold the Brakes till 1800-2000. After torque hits she climbs high.

Quote:
Originally Posted by onebaddmaxxx View Post
What size converter is it? The one in our race truck is built off a 13" converter not a small 245mm or 278mm like most probably would build it as. Suncoast did ours its a 1055-2 with an 80 hub welded to it basically. (2500-2600 stall) but the 13" converter is where its at. with a single 76mm and big fuel it stalled perfect and had no where of the flash yours did. If you have any questions feel free to PM me...
I figured it should not be pulling at that high RPM all the time. It is a Pro Torque 13'' Multi Clutch.
I can no longer get any info from them, no return call. I would not say this out loud, but I told them I am holding no one responsible but would like to know the specs, how much HP & Torque it does handle so I can get it better this time and no reply !!
Appreciate the help
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Old 09-09-2019, 02:58 PM
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Quote:
Originally Posted by rfletes79 View Post
I can get them build here locally out of Sacramento. He does the one in my chevelle and has done several for the 4l80 as well.
Your set up Non VVT, what stall Rpm do you run?
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Old 09-09-2019, 03:11 PM
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Quote:
Originally Posted by onebaddmaxxx View Post
What size converter is it? The one in our race truck is built off a 13" converter not a small 245mm or 278mm like most probably would build it as. Suncoast did ours its a 1055-2 with an 80 hub welded to it basically. (2500-2600 stall) but the 13" converter is where its at. with a single 76mm and big fuel it stalled perfect and had no where of the flash yours did. If you have any questions feel free to PM me...
Is it tight enough to be driveable cruising on Street. I have 2:90's so 1500-1800 cruising 65. I do more of that than Drag Strip. the one I have is anoying running 3800 Rpms as soon as you give it a little kick. 2500 Might not be bad if it does not fly to 3800 with throttle, sounds like it might spool a little quicker also. Going from VVT to Non VVT is a long wait even with Twins.
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