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1970 Cuda 340 clutch #2446726
02/05/18 10:32 AM
02/05/18 10:32 AM
Joined: Feb 2010
Posts: 227
NY
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moparmatt0 Offline OP
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moparmatt0  Offline OP
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NY
What is the best clutch for a mild 340 street use only thanks for the help.

Re: 1970 Cuda 340 clutch [Re: moparmatt0] #2446877
02/05/18 03:10 PM
02/05/18 03:10 PM
Joined: Jan 2003
Posts: 4,707
Moved to N.E. Tennessee
GomangoCuda Offline
master
GomangoCuda  Offline
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Joined: Jan 2003
Posts: 4,707
Moved to N.E. Tennessee
For your application I think you would like a Centerforce. Many here will agree but a few purists will insist on a Borg & Beck style.


In theory, there is no difference between theory and practice. In practice, there is.
Re: 1970 Cuda 340 clutch [Re: moparmatt0] #2446897
02/05/18 03:38 PM
02/05/18 03:38 PM
Joined: Feb 2010
Posts: 227
NY
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moparmatt0 Offline OP
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moparmatt0  Offline OP
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NY
What centerforce do you recomend

Re: 1970 Cuda 340 clutch [Re: moparmatt0] #2446954
02/05/18 05:28 PM
02/05/18 05:28 PM
Joined: Jan 2003
Posts: 16,376
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dogdays Offline
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dogdays  Offline
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Mild 340 street use only will use a stock clutch set just fine. Why complicate things???

Rockauto is your friend in this case:
http://www.rockauto.com/en/catalog/plymouth,1970,barracuda,5.6l+340cid+v8,1496494,transmission-manual,clutch+kit,1993

Generally speaking, the diaphragm clutches have lower pedal effort than the Borg & Beck.

Here's why you don't need anything more than a stock type clutch: factory engineers were very good at matching clutches, transmissions, etc., to the engine in front of them. If you have hopped up your 340 mildly or even majorly, without a power adder the engine's torque will not increase over stock or at most, add 10%, which is well within the safety margin designed into your stock clutch. What increases the power is moving the torque peak higher in the rpm range. But it doesn't matter what horsepower your engine makes! What the clutch sees is TORQUE. So unless you use nitrous or supercharger/turbocharger the torque stays close to the same, meaning the stock clutch is adequate. The farther you go from originality, the greater the chance of reducing driveability.

BUT if you really have to spend $500, then either the Centerforce II or Dual Friction is a very nice setup which will last forever in your application.

R.

Re: 1970 Cuda 340 clutch [Re: moparmatt0] #2447201
02/06/18 12:41 AM
02/06/18 12:41 AM
Joined: Jul 2011
Posts: 953
Chicago
PurpleBeeper Offline
super stock
PurpleBeeper  Offline
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Joined: Jul 2011
Posts: 953
Chicago
I will point out that years ago I bought a "stock" clutch from AutoZone & I couldn't hit the gas pedal more than about 1/3 of the way down, even while already moving, without slipping the clutch.... HORRIBLE. So don't go "ultra cheap" in my opinion and at least get a decent one.

Also, I had some bad luck recently with a Hays street/strip clutch, but I was pretty hard on it to be honest. It just didn't seem like the same quality Hays used to sell.


70 Roadrunner convt. street car 440+6, NOS, 4-spd, SS springs '96 Mustang GT convt. street car '04 4.6 SOHC, NOS, auto, lowered "Officer, that button is for short on-ramps"
Re: 1970 Cuda 340 clutch [Re: moparmatt0] #2447661
02/06/18 09:46 PM
02/06/18 09:46 PM
Joined: May 2007
Posts: 1,443
Maryland
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Dads426 Offline
pro stock
Dads426  Offline
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Joined: May 2007
Posts: 1,443
Maryland
I used a Luk clutch and pressure plate from Rock Auto for my stock 72 340 Duster a few years ago and I'm very happy with it. You have to remove the overcenter spring and the pedal effort is low and engagement is very smooth. Luk clutches have a good reputation with the Diesel truck crowd.



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Re: 1970 Cuda 340 clutch [Re: moparmatt0] #2447713
02/06/18 10:44 PM
02/06/18 10:44 PM
Joined: Jan 2003
Posts: 2,252
New York
rarefish Offline
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rarefish  Offline
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Posts: 2,252
New York
I bought a B&B stock replacement clutch for my 69 340 Dart last summer from Rockauto and I had problems with it right out of the box. The pressure plate was set to low when assembled. The pressure plate fingers ended up hitting the damper springs in the clutch disc when the clutch pedal was pushed to the floor. It made one hell of a grinding noise.
I had to pull the whole assembly back out and return it for a refund.
I ended up buying B&B Ram "Street" Clutch #88766 from Summit Racing which worked out fine for me.
The catalog picture on Summit's web site shows a diaphragm pressure plate, but it is actually a B&B pressure plate.

Re: 1970 Cuda 340 clutch [Re: rarefish] #2448079
02/07/18 04:59 PM
02/07/18 04:59 PM
Joined: Jan 2003
Posts: 5,268
NY
7
70440+6bbl Offline
master
70440+6bbl  Offline
master
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Joined: Jan 2003
Posts: 5,268
NY
I had the exact same problem with that clutch in my ‘69 340 Swinger several years back.


'70 Super Bee 440 6 pack 4-spd 4.10 Dana N96 EB5
‘70 Super Bee 440 6 pack 4-spd 3.54 Dana FC7
‘70 ‘Cuda 440+6bbl 4-spd 3.54 Dana N96 EB5 V1W

Re: 1970 Cuda 340 clutch [Re: moparmatt0] #2451155
02/13/18 12:43 PM
02/13/18 12:43 PM
Joined: Dec 2009
Posts: 1,023
pa.
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dan9 Offline
super stock
dan9  Offline
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Joined: Dec 2009
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pa.
I have a McLeod in mine with no problems. It came from Passon’s.

Re: 1970 Cuda 340 clutch [Re: moparmatt0] #2451179
02/13/18 01:51 PM
02/13/18 01:51 PM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Offline
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dvw  Offline
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Joined: Mar 2006
Posts: 9,791
MI, usa
I've used the Center Force in my 360 Challenger for years. Drag strip with slicks (12.50), thousands of street miles. Never slips. Never shudders. Good pedal pressure (over center spring removed, wife's car). Resonably priced. Hands down the best clutch I've used in over 40 years of hot rods.
Doug

Re: 1970 Cuda 340 clutch [Re: moparmatt0] #2451247
02/13/18 04:45 PM
02/13/18 04:45 PM
Joined: Jan 2003
Posts: 5,435
So Cal
Sinitro Offline
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Sinitro  Offline
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Posts: 5,435
So Cal
I have been running a McLeod for many years in the RR..
Originally tried a CenterForce, didn't like it pulled it out and chucked it in the dumpster...

Just my $0.02... wink

Re: 1970 Cuda 340 clutch [Re: moparmatt0] #2456481
02/24/18 02:05 AM
02/24/18 02:05 AM
Joined: Jan 2003
Posts: 1,607
Western Washington
Sixgun Offline
top fuel
Sixgun  Offline
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Joined: Jan 2003
Posts: 1,607
Western Washington
Mcleod 10.95 3 roller...ceramic faced disc= awesome. I tear 'em up and these things last. Rebuildable at McLeod also. 671 HP 670 TQ and no dual disc...


I'm 55 now, no time to waste. Not a week goes by that I don't hear about someone passing on.Let's get out there,smoke some tires,have a beer with a good friend,do what you have always wanted to do.I am pretty sure no one will ever say on their deathbed "gee I'm glad my life was calm and boring"






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