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What exactly would a new, high performance clutch do?

J

Jedi86

Guest
I got this crazy notion that a new high performance clutch will give my car a little more oomph. Maybe one of those Centerforce cluthes? Will it give me some gain or would I be wasting my money?
 

Ken

Gone but not forgotten
Joined
Jan 30, 2001
Messages
8,236
Location
Hermosa Beach, CA
Corvette
1987 Z51 Silver Coupe
Welcome To The Corvette Action Center Jedi86!

Jeff, the only thing a performance clutch is going to do is give you more transfer of the power being delivered by the engine, through to the transmission. The Centerforce units use centrifugal force to increase the pressure on the disc assembly as the revolutions of the engine increase. If no other modifications have been done to the engine to increase its power output, a clutch other than what was recommended by the manufacturer is overkill.

However, if you do increase the output of the engine, the clutch must be one of the first things addressed in order to get that new-found power to the wheels. Then traction becomes an issue, but that's food for another thread. ;)
 
J

Jedi86

Guest
Hey thanks Ken! Your really cool! Yeah, my friend claimed that his brother ran his GSR into the 13's with a racing clutch. I never really believed him in the first place. Thanks again!
 

Ken

Gone but not forgotten
Joined
Jan 30, 2001
Messages
8,236
Location
Hermosa Beach, CA
Corvette
1987 Z51 Silver Coupe
That's what we're here for! :D

Good luck with your car. :upthumbs

_ken :w
 
J

johnny

Guest
Jeff,

I have bought a new centerforce cluch and it will be installed in about 7 weeks. I also have ordered a short throw kit (hurst or b&m, whats availeble), when it's installed I let you know.

What you also can do, is installing a lightweight aluminum flywheel. (tpis 450$)

johnsig2.jpg

john
 

BigRed

Well-known member
Joined
May 23, 2001
Messages
948
Location
Edmonton
Corvette
1985 Bright Red Rocket
I have a Centerforce Dual Friction in mine, but I also have a slightly mod style car. I love the clutch its allows incredible flexibility. For instance I was snowing here and I HAD to move the car naturally we got her stuck in some snow and had to pull her out. So I did all the hook ups etc.. but forgot I used to E brake out of habit. Vroom vroom vroom WTH?? Why wont my wheels spin Vroom Vroom Vroom WHATS THAT SMELL!! Vroom Vroom VRoom Uh oh SMOKE! and then BANG BANG BANG like the tranny split into two!!. Turn out that sound was my rear brakes letting go at 3 different times (Phew) and I figured out I had the E brake on. (big 4 letter words) and some calming down later we got it out
and drove it No problems like it never happend I really respected the clutch that day. I do however realize I probably put like 50 000 miles on it though.

Whatta Night:crazy :hb :hb ;stupid :hb :hb :crazy
 

IraPlayer

Active member
Joined
Oct 3, 2001
Messages
29
Location
Dublin, CA, USA
Corvette
1994 Black/Black Coupe
my friend claimed that his brother ran his GSR into the 13's with a racing clutch

jedi, if your friends brother had already modified the engine, the clutch may have made a significant difference. But stock, almost no difference.

Getting poor hook up in the transitions really kills the times.

Rick
 
J

Jedi86

Guest
Hey Big Red, what types of mods do you have done to your car at this moment?
 

BigRed

Well-known member
Joined
May 23, 2001
Messages
948
Location
Edmonton
Corvette
1985 Bright Red Rocket
All Dynomax Exhaust (No cats)
Complete MSD Ignition
K&N Filter (With the hole in box cut)
High Compression Pistons
Lumpy Cam (If I remember what the mechanic told me it was a Crane)
CenterForce Dual Friciton Clutch and T Bearing
Ported Plenum

And I havent checked yet but I was running a 160degree Thermostat when I bought the car also the engine was purple from the last rebuild, so Im assuming it has a hypertech or something. I'll know for sure when I change my ECM from a 85 to a 89 model.
 
J

johnny

Guest
Big Red,

You use the L98 heads? Do you have modifed them? Have you dyno tested your car yet, I am curious how much rearwheel power you have.

johnsig2.jpg
 

BigRed

Well-known member
Joined
May 23, 2001
Messages
948
Location
Edmonton
Corvette
1985 Bright Red Rocket
I use the L98 heads. They are the Cast Iron ones though Not the Aluminum. To the best of my knowledge they are stock they could have been ported or something but I really can't say. When I bought the car this was all done already I was told about the pistons and the Cam and my mechanic verifyed it. (thats how I came to buy the car)

Now here in my home town of Edmonton we have like 2 or 3 good dyno guys to go to. One says I can't go on because he can't chain my car down to anything and the other I can't get a hold of.

Its winter here so when its Spring or Summer Id like to run it on the dyno but if I can't I will definitly have some quarter mile times for you.

(Believe me I curious on how much rear power I have as well)
Only way I can even guess is by adding it up to what it should equal out to like MSD box= 10hp K&N(open air)=10hp so on...
 

Ken

Gone but not forgotten
Joined
Jan 30, 2001
Messages
8,236
Location
Hermosa Beach, CA
Corvette
1987 Z51 Silver Coupe
BigRed said:
Only way I can even guess is by adding it up to what it should equal out to like MSD box= 10hp K&N(open air)=10hp so on...

:nono I'm afraid it doesn't work like that. :L

_ken :w
 
Joined
Oct 30, 2001
Messages
2,273
Location
Glen Burnie, MD, USA
Corvette
1986 Bright Red Coupe
Regarding the GSR, since you have to rev the &*#(^&*#$ out of that little engine to get any torque at all, a racing clutch would let you repeatedly dump the clutch at 5k RPM without burning it out...
[RICHR]
 

BigRed

Well-known member
Joined
May 23, 2001
Messages
948
Location
Edmonton
Corvette
1985 Bright Red Rocket
Ken thats why I haven't given a total as to what I feel my car has. Unless you have a better Idea to get a rough estimate on what my car has please feel free the comment a solution and not a usless remark like:nono

When someone asks me what my car has I tell them what its equiped with, when someone asks me what the Dyno'ed HP and Torque is I can't say because the retards here won't chain my car up for the test. So what exactly am I supposed to say or do when someone says " Oh bro cool car what kind a HP does that thing put out? " I say shes 230 stock with about 50hp in add ons always a rough estimate until I can find a dyno that will accept my car.
 

Ken

Gone but not forgotten
Joined
Jan 30, 2001
Messages
8,236
Location
Hermosa Beach, CA
Corvette
1987 Z51 Silver Coupe
Please don't take offense, I meant nothing by it. Sorry, my humble apologies. :eek:

_ken
 

BigRed

Well-known member
Joined
May 23, 2001
Messages
948
Location
Edmonton
Corvette
1985 Bright Red Rocket
Np bro half of the **** off is never knowing. my car was a hotrod from the purchase date. I really have to get a Dyno done but how and where is my problem/
 
J

johnny

Guest
Ken,

I came for a meeting with Castro, he loved my vette, so he gave me his sigar.

Big Red,

The only thing that counts is the rearwheelpower, sorry.

johnsig2.jpg
 

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