Stock clutch capacity? Please confirm.
03-04-2008, 11:36 PM
#1
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Stock clutch capacity? Please confirm.
Over the last few days, I've done a ton of Internet research and it seems that the stock clutch for my year might be a LuK unit rated at 350hp and 750ft/lb.
If this is correct and with 40k miles, I should be near the peak performance.
The clutch in my truck will hold Smarty Jr on #1 with no problems in any gear at any load.
But #2 SW slips the clutch right around 1900rpm any time the boost is higher than 32lb.
Since SW#2 = 70hp gain...that at the clutch, I'm pushing 395hp and roughly 780 to 800 ft/lb (at the clutch).
Sound feasible?
Given I intend to go to 34" or 35" tires, add a CFM+ manifold and a new CAC to replace my plastic fantastic - it seems I should be looking at a 450hp unit that can handle at least 900ft/lb (at the clutch). Figuring of course that the Smarty JR. will at least at some time see SW#3.
No other mods are in my forseeable future.
All input welcome.
If this is correct and with 40k miles, I should be near the peak performance.
The clutch in my truck will hold Smarty Jr on #1 with no problems in any gear at any load.
But #2 SW slips the clutch right around 1900rpm any time the boost is higher than 32lb.
Since SW#2 = 70hp gain...that at the clutch, I'm pushing 395hp and roughly 780 to 800 ft/lb (at the clutch).
Sound feasible?
Given I intend to go to 34" or 35" tires, add a CFM+ manifold and a new CAC to replace my plastic fantastic - it seems I should be looking at a 450hp unit that can handle at least 900ft/lb (at the clutch). Figuring of course that the Smarty JR. will at least at some time see SW#3.
No other mods are in my forseeable future.
All input welcome.
03-05-2008, 02:02 AM
#2
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my Nv5600 held my edge juice with attitude fore 60,000 miles and 6 sled pulls. Never slipped even in 6th gear if I lugged it. That clutch was awesome. I have 3 guys though with the G56 and it they just put 50hp on them and they slip right away.
03-05-2008, 05:49 AM
#3
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My G56 clutch slips a little with Jr. on #1. When the torque comes on, the rpm jumps up about 200 for about 2 sec. then settles right down to hold the load. The clutch has never been abused, no burnouts, mostly gentle driving for fuel econ. Truck has only 23k miles. I am very disappointed.
Ted
Ted
03-05-2008, 06:07 AM
#4
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My stocker slips in 5th and 6th when I get on it w/ 70k miles and an XZT box.
03-05-2008, 07:20 AM
#7
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My stocker held crazy larry for approx. 14k and never slipped. I actually saved the stocker for a emergency back-up because it looked like new yet.
My receiver hitch still has paint in the inside of it, if that means anything to you.
My receiver hitch still has paint in the inside of it, if that means anything to you.
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03-05-2008, 07:21 AM
#8
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I've been running Jr for a few thousand miles now on 100hp full time and never once slipped the stock clutch. I'm not beating on it though cause I'm sure it would slip. Looking to get a SB Con OFE this summer. Should hold plenty good for a Jr+X2 stack or probably even a Sr alone.
03-05-2008, 09:11 AM
#9
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My stock clutch still holds smarty on sw9 at 72000 miles. Since new it has been a plow truck/tow truck. Have run TS ramifier, Banks 6-gun w/spd loader, TST, edge EZ, and now smarty. The tst is the only one that could spin the clutch when turned up above 5/5. Have a SB OFE waiting for the stock one to fail.
03-05-2008, 08:46 PM
#13
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Mine slipped with 29K on it and the Predator on Performance/Economy for the last 2k miles. I just replaced it with a SBC DD 3600# and am very pleased with it. I am going to hang on to mine for a while just in case something goes wrong with the SBC, but I am not thinking that is going to happen.
03-05-2008, 09:11 PM
#14
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No slip on sw# 1 & 2 with 2000# on my back and 285's. It's staying on sw#1,however,as i can't afford an SBC now. I'm hoping for a 450 hp,quiet clutch SMF when the time comes. I read differing accounts of the SBC OFE's driveability and noise levels. A competent install is imperative as with any product.