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Clutch suggestion 1970 390 |
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ccowx 
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Joined: Nov/03/2010 Location: Yukon Status: Offline Points: 3510 |
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 Topic: Clutch suggestion 1970 390Posted: Jul/02/2016 at 7:58pm |
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What do you guys suggest for a 1970 390 with a stock T-10 and around 375-400 hp at the flywheel? Not looking for a race piece or anything fancy, just a good street clutch.
Thanks! Chris
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bikerfox
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Posted: Jul/02/2016 at 11:45pm |
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Chris--this is like asking which most men find more attractive: blondes or brunettes.
And, this topic has been extensively discussed on the forum, so I'm surprised you haven't done your research, based on the question you asked. Briefly, there are two types of clutches: borg and beck style and diaphragm. B&B probably came with your '70 AMX when it was new. I prefer this style, as I like the firm feel of the clutch pedal as I depress it, just like back in the day. Most others like the diaphragm style, as not as much leg strength is needed to engage the clutch. I've heard that it's smoother and easier to engage the clutch. There are many brands of each available. I use a McLeod. You won't find an AMC application on their website, but they do carry the B&B style. Based on my experience, I would recommend using organic clutch disc material, rather than carbon fiber or ceramic materials, materials that racers with a lot more hp use. Hope that helps, Steve
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1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
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Rebel Machine
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Posted: Jul/03/2016 at 6:51am |
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I've got a 401 making about 435 HP in my Machine right now and I'm using a Ram 88499HDX clutch in it. It operates smooth with no chatter and clamps good.
The alignment tool and throwout bearing didn't fit though as I'm using the earlier T-10 front bearing retainer. -Steve- |
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Red Devil
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Posted: Jul/03/2016 at 9:32am |
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McLeod also offers the Borg&Beck Long PP which is a hybrid of the Borg&Beck hat with Long-style levers to get the advantages of the Long-style PP in a package that bolts to a flywheel drilled for a Borg&Beck hat.
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ccowx
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Posted: Jul/03/2016 at 10:04am |
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Thanks guys! I did do a couple of searches for various combinations of "Clutch recommendations" or similar and did not get anything. If you have any old threads to suggest, I would be happy to read them.
I have done lots of clutches in my other world of air cooled VW's but it was over 20 years ago that I last did an AMC clutch. Lord only knows what I used then. Now I live in a small place and having some knowledge can be very helpful when dealing with my neighbours 18 year old kids at the parts counter. There is a NAPA clutch kit available but I don't trust it. I have no idea of the clutch disc material or much of anything else. It is 10 spline, 1-1/8" and a 10-3/8" diameter disc. No clear listing of numbers of spring and rollers or clamping pressure. The TSM gives 10" diameter for the 304 and 10-1/2" for the 360/390, so I suspect "one size fits all". Thanks! Chris
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bikerfox
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Posted: Jul/03/2016 at 5:54pm |
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Chris--I tried a B&B style Napa clutch and do not recommend it.
It was "loosy goosy," at best--foot pressure required was a joke-- way too easy.
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1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
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ccowx
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Posted: Jul/03/2016 at 6:34pm |
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Steve,
You are just confirming what I suspected on the NAPA item. Looking at the specs it looks like it splits the difference between the 304 and 360/390 units and probably is figuring that 80+% are going into a 304 jeep. I have a bit different situation than that so some additional looking is needed. Is the Ram clutch a B+B or diaghram stye? BTW, I tend towards brunettes, personally. Thanks! Chris
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Rebel Machine
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Posted: Jul/03/2016 at 7:35pm |
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The Ram clutch I mentioned above is a Borg & Beck 3-finger.
http://www.jegs.com/i/RAM-Clutches/798/88499HDX/10002/-1 -Steve- |
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pacerman
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Posted: Jul/03/2016 at 9:21pm |
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Just curious: Where is the RAM clutch made? The McLeod?
Joe
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Happiness is making something out of nothing.
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bikerfox
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Posted: Jul/03/2016 at 11:08pm |
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Don't know where the Ram clutch is made, but I believe
the McLeod clutch is made in CA.
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1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
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