Ok, I've searched page after page on clutches in this forum and based on my wallet and my plans for the car and the arguments btwn all of you guys, I have narrowed my decision down to the SLP/LT4 clutch and the Spec Stage III clutch (which is on possible GP right now).
For all of you who have put a few more miles on those aftermarket clutches you have, do you still stand behind that slp or spec clutch??
Eventually I want to get to around 400-450 rwhp . Are any of the slp clutch owners putting up those rwhp #'s??
I know there have been a few owners who've complained about the Spec but I don't see any complaints on the slp-- but is that due to slp owners not being the ones with AS MUCH horsepower as the Spec owner?
Daniel
For all of you who have put a few more miles on those aftermarket clutches you have, do you still stand behind that slp or spec clutch??
Eventually I want to get to around 400-450 rwhp . Are any of the slp clutch owners putting up those rwhp #'s??
I know there have been a few owners who've complained about the Spec but I don't see any complaints on the slp-- but is that due to slp owners not being the ones with AS MUCH horsepower as the Spec owner?
Daniel
Registered User
My spec stage III, 2 of my friends stage III's and 2 board members stage III's have failed on them.
Mine was one of the worst... blew the **** out of everything near it.
LT4's and SLP's havent failed like that. They usually just cant hold the horse power and slip...
Course some members have 400-450 rwhp and used stock lt1 clutches.
In my opinion the Spec stage III was annoying... engaged to hard and rattled to much.
Mine was one of the worst... blew the **** out of everything near it.
LT4's and SLP's havent failed like that. They usually just cant hold the horse power and slip...
Course some members have 400-450 rwhp and used stock lt1 clutches.
In my opinion the Spec stage III was annoying... engaged to hard and rattled to much.
Registered User
I don't know what the SLP/LT4 clutch is like because I have never had one but I can tell you that my Spec Stage 3 Ceramic is just awesome! There was a little bit of chatter when I was breaking the clutch in but it all went away after some driving. Its very grabby but it is definatly a clutch you can drive everyday in and out of traffic. Other people have mixed feeling on the streetability of the Stage 3 but I love mine! If you plan on making some serious HP and you do not want to buy a Street Twin then I suggest you get a Stage 3. If you plan on staying stock or nothing too aggressive I suggest the SLP. Oh BTW try using the search, you will find TONS of information on these 2 clutches.
Registered User
So far so good on my SPEC stage III KEVLAR disc. I have a season of complete abuse and over 40 passes at the strip. I'll have to admit its on the verge of not being streetable, a little grabby tiny bit of chatter. But hey its a friggin race car not moms Maxima you know?? It sure met my expectations, although other people seem to have issues.
Registered User
I've had the SLP clutch in for the last 5K miles and made roughly 30 passes with Dr's on it, I've had no problems with it slipping or anything yet. I estimate I was around 300rwhp last year. I doubt this clutch would hold up to 450 rwhp and much hard racing though, the disc is just a stock LT1. I would go with the SPEC if I were planning that kind of HP and if the car was going to see much track use. I beleive SLP rates theirs to hold up to 350rwhp. I will probably just swap out the disc for a Spec or Mcleod if mine ever starts to slip since the PP is the same used with those clutches, the LT4
Registered User
The LT4 and SLP clutch are not the same.
Apparently, the LT4 PP has beefier and more fingers than the SLP unit (a drilled LT1 PP).
The disc also is different between LT4 and LT1/SLP.
The LT4 and STAR PPs look identical, and there is speculation that they are the same unit.
The LT4 disc apparently chatters and is nosier.
I did the SLP PP and SLP disc (LT1), and feel confident in it.
Maybe somebody can confirm whether the SLP disc is the SAME as the LT1 disc, or whether SLP upgrades the springs....????
Apparently, the LT4 PP has beefier and more fingers than the SLP unit (a drilled LT1 PP).
The disc also is different between LT4 and LT1/SLP.
The LT4 and STAR PPs look identical, and there is speculation that they are the same unit.
The LT4 disc apparently chatters and is nosier.
I did the SLP PP and SLP disc (LT1), and feel confident in it.
Maybe somebody can confirm whether the SLP disc is the SAME as the LT1 disc, or whether SLP upgrades the springs....????
Registered User
Quote:
Originally posted by DR.ZED
The LT4 and SLP clutch are not the same.
Apparently, the LT4 PP has beefier and more fingers than the SLP unit (a drilled LT1 PP).
The disc also is different between LT4 and LT1/SLP.
The LT4 and STAR PPs look identical, and there is speculation that they are the same unit.
The LT4 disc apparently chatters and is nosier.
I did the SLP PP and SLP disc (LT1), and feel confident in it.
Maybe somebody can confirm whether the SLP disc is the SAME as the LT1 disc, or whether SLP upgrades the springs....????
Zed, I am almost positive the SLP PP is the LT4 PP only with holes in it. SLP definitely does not use the LT4 disc though and I'm almost 100% certain it is just an LT1 disc. I originally bought just SLP's PP and an actual LT4 disc (from Dal) since I thought it would make a good setup. I had a lot of chatter through the trans with it and ended up removing the disc after just 1000 miles and ordered the LT1 disc from SLP. Chatter gone. I should have just done what SLP recommended in the first place when I told them I was going to use the LT4 disc, it would have saved me a lot of hassle. Originally posted by DR.ZED
The LT4 and SLP clutch are not the same.
Apparently, the LT4 PP has beefier and more fingers than the SLP unit (a drilled LT1 PP).
The disc also is different between LT4 and LT1/SLP.
The LT4 and STAR PPs look identical, and there is speculation that they are the same unit.
The LT4 disc apparently chatters and is nosier.
I did the SLP PP and SLP disc (LT1), and feel confident in it.
Maybe somebody can confirm whether the SLP disc is the SAME as the LT1 disc, or whether SLP upgrades the springs....????
Registered User
Quote:
Originally posted by GREGG 97Z
Zed, I am almost positive the SLP PP is the LT4 PP only with holes in it. SLP definitely does not use the LT4 disc though and I'm almost 100% certain it is just an LT1 disc. I originally bought just SLP's PP and an actual LT4 disc (from Dal) since I thought it would make a good setup. I had a lot of chatter through the trans with it and ended up removing the disc after just 1000 miles and ordered the LT1 disc from SLP. Chatter gone. I should have just done what SLP recommended in the first place when I told them I was going to use the LT4 disc, it would have saved me a lot of hassle.
Brent Franker has a good write up on his site about the two clutches. The SLP and LT4 looks different. The LT4 and Spec look identical.Originally posted by GREGG 97Z
Zed, I am almost positive the SLP PP is the LT4 PP only with holes in it. SLP definitely does not use the LT4 disc though and I'm almost 100% certain it is just an LT1 disc. I originally bought just SLP's PP and an actual LT4 disc (from Dal) since I thought it would make a good setup. I had a lot of chatter through the trans with it and ended up removing the disc after just 1000 miles and ordered the LT1 disc from SLP. Chatter gone. I should have just done what SLP recommended in the first place when I told them I was going to use the LT4 disc, it would have saved me a lot of hassle.
Let me know what you think.
Registered User
I think you are referring to this writeup:
http://www.ws6.com/slpclutc.htm
Gregg
http://www.ws6.com/slpclutc.htm
Quote:
Here's the new SLP pressure plate. Definitely a heavier design. Rumor is that it's the LT4 pressure plate, as it's a Valeo design, and Valeo only did two that fit the LT1. The drilled holes are for lightening and heat dissapation.
Here's the new SLP pressure plate. Definitely a heavier design. Rumor is that it's the LT4 pressure plate, as it's a Valeo design, and Valeo only did two that fit the LT1. The drilled holes are for lightening and heat dissapation.
Quote:
The SLP pressure plates' fingers were thicker, and didn't require the ridges. Here you can also see the ring that holds the throwout bearing in place. As discussed later, this came out during normal operation!
From that writeup and countless discussions here on the subject I beleive the consensus is that SLP's PP is a modified LT4 PP.The SLP pressure plates' fingers were thicker, and didn't require the ridges. Here you can also see the ring that holds the throwout bearing in place. As discussed later, this came out during normal operation!
Gregg
Registered User
I see that clutch, and it is NOT what I got from slp. I am almost positive of it.
If I remember correctly it looked identical as the stock LT1 one.
Here is another writeup:
http://www.bfranker.badz28.com/fbody/clutch.htm
Lets get to the bottom of this, it makes for some good fact-finding.
Great info so far.
If I remember correctly it looked identical as the stock LT1 one.
Here is another writeup:
http://www.bfranker.badz28.com/fbody/clutch.htm
Lets get to the bottom of this, it makes for some good fact-finding.
Great info so far.
Registered User
Stage 3 good so far here, pretty smooth, chatters every once in a while, makes a squealing noise sometimes if you ride the clutch too long in heavy traffic, but grabs like nothing. Customer service good too. Dont know anything about SLP or LT4 so cant help there.
Registered User
This is the PP I got from SLP along with an actual LT4 disc, not the disc SLP sells
I've never heard that SLP ever used the LT1 PP in their clutch package but I guess it's possible. Not to confuse things even further but when I pulled out my original clutch I swore the old PP was identical to the new PP except for the holes
I bought my car as a dealer demo car though, and it had over 5000 miles on it. I really started to wonder when I had the new one installed if someone smoked the original clutch in the car during it's test driver days and the dealer installed an LT4 PP with a stock disc. 
Who knows.
I've never heard that SLP ever used the LT1 PP in their clutch package but I guess it's possible. Not to confuse things even further but when I pulled out my original clutch I swore the old PP was identical to the new PP except for the holes
I bought my car as a dealer demo car though, and it had over 5000 miles on it. I really started to wonder when I had the new one installed if someone smoked the original clutch in the car during it's test driver days and the dealer installed an LT4 PP with a stock disc. Who knows.
Ok, not to get off the current subject but does anyone have experience with the Ram clutch? I've been leaning towards the Spec 3 but keep hearing negatives.
Registered User
The only clutches ive ever seen in people with high hp sigs are spec and mccleod, a few lt4 and slp but they arent quite as high hp. ram and centerforce, heard they are ****, thats just heresay though, no hard evidence.
Registered User
I would stay away form the spec b/c of all the people i know personally who have blown theirs to pieces.
I have the SLP and like it, its not a huge clutch, but works for where i am at right now.
If you are going big, go street twin, period.
You can also do a centerforce PP, with lt1 disk (you need adj slave!) and it will hold great. A buddy is running that and pulling 1.7's day in and out on slicks, 373s. The problem people are always having with the centerforce, IMO, is hydrolic failures b/c the clutch doesnt realease all the way, which is why you need the adj slave.
I have the SLP and like it, its not a huge clutch, but works for where i am at right now.
If you are going big, go street twin, period.
You can also do a centerforce PP, with lt1 disk (you need adj slave!) and it will hold great. A buddy is running that and pulling 1.7's day in and out on slicks, 373s. The problem people are always having with the centerforce, IMO, is hydrolic failures b/c the clutch doesnt realease all the way, which is why you need the adj slave.