LT1-LT4 Modifications 1993-97 Gen II Small Block V8

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Old 08-22-2010, 06:36 PM
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I'll also add that this clutch is not an ON/OFF switch.

The way I rape people on the street is launching off the 2-step and slightly sliding the clutch off the line, as opposed to just dumping it. That is easier on the drivetrain and at least gives the tires a chance to hook.

This clutch works very well for that if that's your driving style. Once you get used to the engagement point you can slide it off the line and keep the tires hooked up and launch pretty damn good off the street. Where as with a solid 6 puck disk for example, that's very hard to do because it's either on or off.

Very happy with this thing for my driving style and power level.
Old 08-22-2010, 06:40 PM
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how heavy is it? say compaired too a spec3
Old 08-22-2010, 06:43 PM
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No idea, never picked up a SPEC 3.

I can tell you it's not much heavier than the stock clutch though... If that helps. The flywheel is the same weight as a stock LT4 Valeo, and the disk is not heavy at all.
Old 08-22-2010, 06:45 PM
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did you custom order it? i dont see the stage 2.5 on there site. Looks like I found the clutch im going too get.

What mods do you have btw?
Old 08-22-2010, 06:48 PM
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The stage 2.5 is listed up at the top and gives you the friction material its made of and the HP rating. They dont have an LT1 part number added to the site for the stg 2.5 though, so yes you have to call.

The part number is 4134-2375

My mods are custom XFI cam only, full bolt ons, and 150 RWHP shot through the Nitrous Outlet plate kit.

Car will dyno 350 RWHP N/A with a few recent changes, and right at 500 on the bottle.
Old 08-22-2010, 06:50 PM
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cool if its holding on bottle for you, it should hold N/A for me.
Old 08-22-2010, 09:32 PM
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autozone clutches are made by valeo
Old 08-22-2010, 09:42 PM
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I dont know what to believe with the Valeo PP's anymore. I went round and round with them and just agreed to disagree. My clutch guy tested a Spec PP and a Autozone PP and they were withing 5% of each other IIRC. I also tested the no name cheap Chinese knock off Valeo and it was actually stronger than the Valeo.

Spec swears that they do something to make it stronger, so does clutchnet. Other vendors use the plain Jane Valeo as is. Interested to see how Comp responds to this.

Seems a stronger PP would be felt in the pedal.

Sounds like a good clutch and I am looking to try it.

Last edited by wrd1972; 08-22-2010 at 09:51 PM.
Old 08-22-2010, 10:13 PM
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I beleave there was some autozone clutches that arnt valeo.. I was reading about it when I was looking at lt4 clutches.. kind of off topic but yet on topic.
Old 08-22-2010, 10:33 PM
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I can tell you the pedal is much stiffer than my stock LT1 clutch was
Old 08-23-2010, 06:15 AM
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Originally Posted by gregrob
I can tell you the pedal is much stiffer than my stock LT1 clutch was
That obviously indicates a stronger PP. Try to put into terms how much stronger.
Old 08-23-2010, 07:52 AM
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Obviously stronger than my worn out ribbed LT1 pressure plate

Last edited by gregrob; 08-23-2010 at 08:03 AM.
Old 08-23-2010, 09:52 AM
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I bought the Competition Clutch Stage 2 from a dealer for $243 shipped about this time last year. That may have been near dealer cost though since the guy is a fellow member of my local car club. Haven't had it running yet, but everything about this clutch kit looks high quality. Glad to hear the good reviews of the Stage 2.5, makes me even more excited to see how mine will do.
Old 08-23-2010, 10:12 AM
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I have the stage 3 for my daily driver and the pedal feels the same but the grip is unbelievable when it grips it holds hard. so far no 5k dumps but its holding with my setup in sig....great all around clutch so far.
Old 08-23-2010, 12:48 PM
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Unless Monster comes out with their LT1 clutches very sood, this Competition clutch is going to be my next clutch. Might even consider the Stage 3 full Kevlar disk as well. Good post.
Old 08-23-2010, 03:25 PM
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well i just ordered a stage 3
Old 08-23-2010, 04:25 PM
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jay you will love it... the best part you want fell a pedal change but you will fill a grip change as soon as you let off the clutch lol.. It only took like 200 miles and the clutch was good but im going to baby it untill 750- 1000 miles
Old 08-23-2010, 04:31 PM
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i don't remember what my pedal felt like.. iv never drivin my car more then 5 miles, so it will be alot of loving feelings im sure lol. I'll be babying mine untill the motors broken in.
Old 08-24-2010, 12:02 AM
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I wonder how the stage 2 clutch feels compared to a stock clutch. This old spec stage 3 clutch I have is too chattery. I want something smoother.
Old 08-24-2010, 12:05 AM
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Ive heard people say the Stage 2 drives like stock, just grips a lot harder.

My 2.5 definitely isnt like stock, but it's still easily streetable.


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