clutch not holding

house said:
how much HP do you have?
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at the first of the year i dynoed it smarty on level 8 and tst on 2 and 2 made 692 then scrolled up to 4 and 2 and made 793 i quit then only had the truck together for a week and i wanted to drive it more so i quit there only pushin about 74psi since then i done some tweakin and now pushin upper 80psi and close to 90s i dont know what it is now but since i did the tweakin i could stomp it and i thought the clutch was slippin jepling said he think it was the tires but now we know the clutch is slipin. i looked at the problems u had tryin to compare just not sure maybe i should detune it some whats ur thoughts?
 
If you are slipping a DD at that hp then you are doing something wrong.

I think a common misconception with a DD is that you can slip it all you want and it should hold up. All it takes is enough heat to bowl shape the discs and it will no longer hold the hp since it has half the amount of surface area.

Just because its a dd doesnt mean you can ride the clutch, if you cant rev it up to 4k and just about side step it you need to fix your setup.

A triple will help since it distributes the heat into 3 discs instead of two but will only last so long if you ride it the same as you did the dd. Clutches are not rocket sceince or magical pixie dust, its plate load and surface area.

I run a SBC triple with a 3250 cover for the last 3 years and its still goin strong and with more hp then what you saying you have. I pulled with a dd 3250 for about a year at 750hp and it finally couldnt take it anymore, but only because I had to ride it alot before I changed my setup.
 
bdp said:
If you are slipping a DD at that hp then you are doing something wrong.

I think a common misconception with a DD is that you can slip it all you want and it should hold up. All it takes is enough heat to bowl shape the discs and it will no longer hold the hp since it has half the amount of surface area.

Just because its a dd doesnt mean you can ride the clutch, if you cant rev it up to 4k and just about side step it you need to fix your setup.

A triple will help since it distributes the heat into 3 discs instead of two but will only last so long if you ride it the same as you did the dd. Clutches are not rocket sceince or magical pixie dust, its plate load and surface area.

I run a SBC triple with a 3250 cover for the last 3 years and its still goin strong and with more hp then what you saying you have. I pulled with a dd 3250 for about a year at 750hp and it finally couldnt take it anymore, but only because I had to ride it alot before I changed my setup.
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i dont ride it long i only turn 3500 rpms and i usually take off at 2500 to 3000 rpms build the boost to about 35 to 40psi and come off the line once its rollin i let completely off the clutch and then my tire usually break loose and starts spinin. whats wrong am i buildin to much boost or to manny rpms or what?
 
ive seen a couple local guys around here get 40+ hooks out of an sbc iron giant and then others only get a few hooks on them?
 
my thinking is it doesnt matter if you have a 4 disc if you have to ride clutch along time there not going to last my buddy has a sbc iron giant with over 50 hooks pulls 4low in 5spd 410 gears and blaze tires of it by 5ft tops im not saying you ride yours to long just what i have seen work the truck only 550hp turn 4k with industrial 66mm turbo
 
not enoughsmoke said:
i dont ride it long i only turn 3500 rpms and i usually take off at 2500 to 3000 rpms build the boost to about 35 to 40psi and come off the line once its rollin i let completely off the clutch and then my tire usually break loose and starts spinin. whats wrong am i buildin to much boost or to manny rpms or what?
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Sounds like you are on it a bit much. You need Smarty TNT race tune so you can rev it to 4100 and that will help build boost just free revving it beforfe you ever even start with the clutch. Another trick with that program I have learned is if you just hold the throttle to the floor it will bounce of the limiter very hard, when it does this it will start building alot of boost and if you catch it just right you can dump the clutch and leave at 30-40psi w/o even riding it.
 
Tried the race tune truck wouldn't run 2500 would pop and hicup and carry on. Then got that fixed still had a problem and when it would hit 4000 the lift pump would cut off everytime and could only make 58psi and put revo back on and made 74psi with plain smarty
 
ddperformance said:
my thinking is it doesnt matter if you have a 4 disc if you have to ride clutch along time there not going to last my buddy has a sbc iron giant with over 50 hooks pulls 4low in 5spd 410 gears and blaze tires of it by 5ft tops im not saying you ride yours to long just what i have seen work the truck only 550hp turn 4k with industrial 66mm turbo
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This is why i believe my dual disc is slippin the ceterplate is bowed
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ya that's some hardcore light load riding right there.... alot of heat and no material displacement.. FUKING GLAZED LIKE A DONUT LEARN HOW TO DRIVE A STICK!!! LOL even your bronze inlay is glazed... you ride it way too much.. get a better tire and drop a gear everything will benefit..
 
I have a valair dd 4000# plate i run a 94 12 valve bout 650 hp i pull 3rd low with 33" truxus it on. the clutch has no more than 8 hooks on it n it slipped the last to pulls. u would think that ther is no way that 3rd low would ever slipp the clucth but it did any in put on what mite b wrong
 
XTrEmE9156 said:
LOL even your bronze inlay is glazed... you ride it way too much.. get a better tire and drop a gear everything will benefit..
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my bronze inlay is not even in the pics i posted may be u need ur eyes checked:hehe::hehe: u can drop a gear i am not i ordered a triple disc:evil:evil
 
valair stands behind his product!!! no ?'s ive abused my 3850 since day one on 37's and havent had a lick of trouble out of it. the times ive pulled i leave the line a little higher than you say you do tho. 3400-3500
 
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[QUOTE="not enoughsmoke, post: 821578, member: 10713"]my bronze inlay is not even in the pics i posted may be u need ur eyes checked:hehe::hehe: u can drop a gear i am not i ordered a triple disc:evil:evil[/QUOTE]

look under the clutch disc, you can see the inlay
 
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