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#2446726 - 02/05/18 07:32 AM 1970 Cuda 340 clutch
moparmatt0 Offline
member

Registered: 02/06/10
Posts: 143
Loc: NY
What is the best clutch for a mild 340 street use only thanks for the help.

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#2446877 - 02/05/18 12:10 PM Re: 1970 Cuda 340 clutch [Re: moparmatt0]
GomangoCuda Offline


Registered: 01/21/03
Posts: 3486
Loc: N.E. Ohio
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.
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#2446897 - 02/05/18 12:38 PM Re: 1970 Cuda 340 clutch [Re: moparmatt0]
moparmatt0 Offline
member

Registered: 02/06/10
Posts: 143
Loc: NY
What centerforce do you recomend

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#2446954 - 02/05/18 02:28 PM Re: 1970 Cuda 340 clutch [Re: moparmatt0]
dogdays Offline
I Live Here

Registered: 01/20/03
Posts: 16174
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.

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#2447201 - 02/05/18 09:41 PM Re: 1970 Cuda 340 clutch [Re: moparmatt0]
PurpleBeeper Offline
super stock

Registered: 07/05/11
Posts: 755
Loc: 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.
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#2447661 - 02/06/18 06:46 PM Re: 1970 Cuda 340 clutch [Re: moparmatt0]
Dads426 Offline
pro stock

Registered: 05/15/07
Posts: 1411
Loc: 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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#2447713 - 02/06/18 07:44 PM Re: 1970 Cuda 340 clutch [Re: moparmatt0]
rarefish Offline
top fuel

Registered: 01/19/03
Posts: 1675
Loc: 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.

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#2448079 - 02/07/18 01:59 PM Re: 1970 Cuda 340 clutch [Re: rarefish]
70440+6bbl Offline
master

Registered: 01/20/03
Posts: 5177
Loc: 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 ‘Cuda 440+6bbl 4-spd 3.54 Dana N96 EB5 V1W

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#2451155 - 02/13/18 09:43 AM Re: 1970 Cuda 340 clutch [Re: moparmatt0]
dan9 Offline
super stock

Registered: 12/30/09
Posts: 1009
Loc: pa.
I have a McLeod in mine with no problems. It came from Passon’s.

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#2451179 - 02/13/18 10:51 AM Re: 1970 Cuda 340 clutch [Re: moparmatt0]
dvw Offline
master

Registered: 03/16/06
Posts: 7055
Loc: 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

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#2451247 - 02/13/18 01:45 PM Re: 1970 Cuda 340 clutch [Re: moparmatt0]
Sinitro Offline
master

Registered: 01/20/03
Posts: 4979
Loc: 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

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#2456481 - 02/23/18 11:05 PM Re: 1970 Cuda 340 clutch [Re: moparmatt0]
Sixgun Offline
top fuel

Registered: 01/24/03
Posts: 1606
Loc: 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...
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