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Moral delima with SPEC

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Old 01-20-2006, 06:48 PM
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Default Moral delima with SPEC

I have a SPEC stage 3F+. It's brand new and awaiting installation when my motor arrives. I've had pretty good luck with SPEC in the past and don't have anything bad to say about them. I'm just relativly scared to put this thing behind my $15k long block. Then again I want to use it because of it's capability to hold 700+hp and still have stage 3 manners. I haven't seen many other clutches that could hold this power range and not cost 1500+. Should I just get a tranny blanket and hope for the best, or look into something else?(alternate must have a 700 hp/tq minimum rating.)
Old 01-20-2006, 10:16 PM
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get the blanket and get the Mcloud Bellhousing so even the worse scenario leaves out your engine and your legs.
Old 01-20-2006, 10:55 PM
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I agree, next time he tranny is out, if I have the cash, im going with a scatter shield.
Old 01-20-2006, 11:47 PM
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I've looked at the Mcloud bell housing. Is that thing a direct bolt in design? $250 bucks for a $15k motor aint that bad a deal.
Old 01-21-2006, 12:56 AM
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Id say go with the SPEC. Just be sure to use new ARP fastners for the PP and FW. Iwould go with a good blanket sence your in there just for added protection.
Old 01-21-2006, 10:55 PM
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Originally Posted by Beast96Z
I've looked at the Mcloud bell housing. Is that thing a direct bolt in design? $250 bucks for a $15k motor aint that bad a deal.

It basically is I think there is a few minor things you might have to do but I can't remember exactly what, I think a little grinding or some crap. To bad the search is not working cause somebody did an awesome write up with pics not too long ago.
Old 01-22-2006, 03:44 AM
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Originally Posted by Mike K.
It basically is I think there is a few minor things you might have to do but I can't remember exactly what, I think a little grinding or some crap. To bad the search is not working cause somebody did an awesome write up with pics not too long ago.
I think it was fireball, pretty sure it was.
Old 01-22-2006, 02:41 PM
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The McLeod bell housing is not a direct bolt on by any means. A lot of material needs to be grinded off the block and off the bell housing itself. Why not go with an LS7 clutch? They seem to hold 700rwhp well. Maybe Textralia?
Old 01-22-2006, 04:25 PM
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For starters forget the blanket, slipping it over the bell housing would be a pain with the wiring harnesses, headers etc. A friend and I are finishing up the install of a SPEC 5 and McLeod bell housing on my car. Fireball did an excellent write up with pictures on this install. My friend recently installed a SPEC 4 and Mcleod bell housing on his car no problems. Anyway there is some grinding to be done on the oil pan so that the front bell housing plate that protects the engine will be flush to the block and oil pan. I also had to do some grinding on the bell housing itself because it was within about 1/4" of the drivers side header. So far the install has gone smoothly we've got the fly wheel, cultch and bell housing on, and I still have to put two or three bolts on at the top of the bell housing. I'll tell you it's really scary when you see that the OEM bell housing is so thin less than a 1/8" aluminum and 6 lbs and the McLeod which weighs 36 lbs and is steel. What convinced me to go with the scatter shield were some pictures of the damage where clutches exploded on a Z28 and Vette.

Last edited by bigdsz; 01-22-2006 at 04:57 PM.
Old 01-22-2006, 04:50 PM
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Originally Posted by Ferocity02
Why not go with an LS7 clutch? They seem to hold 700rwhp well.
You're joking, right?
Old 01-22-2006, 05:17 PM
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How much are your feet/legs worth to you? Do it right,do it once.
Old 01-23-2006, 09:58 AM
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Originally Posted by Cheatin' Chad
How much are your feet/legs worth to you? Do it right,do it once.

werd. After haveing my car ruined but, my legs spared, i'd say take WHATEVER percautions that you can. Get a heavyduty bellhousing,...and a blanket good fasteners....etc etc etc.

Whatever it takes

J
Old 01-23-2006, 10:30 AM
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How about a CARTEK Clutch? Ever Look into it?

Its holding on a 427 Z06 that put down 600RW, at 15% loss that is about 705HP at the crank, right in your teritory. The owner of the car never had a problem with it and it put down low 1.4 60's all day long.

I have one as well but being only H/C I am nowhere need that power output, but I can atest to its streetability.
Old 01-23-2006, 10:39 AM
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Originally Posted by Ferocity02
The McLeod bell housing is not a direct bolt on by any means. A lot of material needs to be grinded off the block and off the bell housing itself. Why not go with an LS7 clutch? They seem to hold 700rwhp well. Maybe Textralia?
700rwhp? Do you have a link to this? I'm very curious...
Old 01-23-2006, 01:11 PM
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Originally Posted by WS6TransAm01
How about a CARTEK Clutch? Ever Look into it?

Its holding on a 427 Z06 that put down 600RW, at 15% loss that is about 705HP at the crank, right in your teritory. The owner of the car never had a problem with it and it put down low 1.4 60's all day long.

I have one as well but being only H/C I am nowhere need that power output, but I can atest to its streetability.

Just got a pm from a member, saying they had a similar failure that I did(my pressure plate came apart,I had a spec) but it was on a cartek clutch, very recently.


Not sure if it's the same dude or not....or the length or extent of his damage or if it was as bad as mine.
Old 01-23-2006, 01:20 PM
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You're joking, right?
No, I'm not.

Originally Posted by Turo
700rwhp? Do you have a link to this? I'm very curious...
https://ls1tech.com/forums/generation-iv-internal-engine/437081-hpe-makes-700-rwhp.html

Stock clutch
Old 01-23-2006, 01:47 PM
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Dude, that's a dyno. A stock LS1 clutch could probably do that on a dyno. Take it to the track and see if it HOLDS 700rwhp, not if it can spin it on a dyno. Two different ballgames there. I knew that you were going to post that link LOL.
Old 01-23-2006, 01:57 PM
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Originally Posted by TroubledWine3
Dude, that's a dyno. A stock LS1 clutch could probably do that on a dyno. Take it to the track and see if it HOLDS 700rwhp, not if it can spin it on a dyno. Two different ballgames there. I knew that you were going to post that link LOL.
Right, a dyno is a WHOLE lot less stress than a clutch dump. Not saying that the LS7 can't do it, I'm just waiting for someone to prove that the LS7 will hold up to clutch dumps at the track with at least 500rwhp. If not, then textralia here I come.
Old 01-23-2006, 03:01 PM
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Originally Posted by TroubledWine3
Dude, that's a dyno. A stock LS1 clutch could probably do that on a dyno. Take it to the track and see if it HOLDS 700rwhp, not if it can spin it on a dyno. Two different ballgames there. I knew that you were going to post that link LOL.
My stock LS1 clutch pooped out at 408rwhp with only 50k miles, on the dyno with no previous clutch dumps are track runs.



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