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docbainey

California Clutch

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Sintered, non-sprung on both vehicles.

I don't like Pegasus.

They sold me some aircraft shear bolts that were crap Chinese shit.

They were for a critical suspension joint, and no way I was going to use them in something that runs 185 mph.

Damn things were so bad, that when I screwed their fake nut onto their fake bolt with my fingers, it seized, and I had to use wrenches to get them apart.

 

The fake airframe bolt is on the left.

DSC06364.jpg

 

To do the Nissan spline disks into my Toyota AP 7-1/4 clutch/flywheel, I went to http://www.powertraintech.com/index.html

They have just about any diameter, thickness, and material disk you can dream up.

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cool site, thanx!

 

Cant remember who we got are AN bolts from when we raced the roadster. Maybe Henrys or Earls? Just looking at the bolt on the left the cad plating is already worn off, pretty bogus.

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cool site, thanx!

 

Cant remember who we got are AN bolts from when we raced the roadster. Maybe Henrys or Earls? Just looking at the bolt on the left the cad plating is already worn off, pretty bogus.

 

Go with Earls !  The manager and I worked together many years ago.  And he just loves my RL411, so I trust him !  Next best things is the McMasters site !

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Earls makes bolts ?

I know they make fittings, but never seen any type of fastener from Earls, or actual clutch part from them.

 

McMaster is a good source for some fasteners, but are real lax on specialty fasteners like Japanese spec. bolts, like fine threads, and small hex stuff. Nothing I hate more than finding Euro spec. bolts like 11, 13, 15, 16mm heads on a Japanese car.

And they sure in hell don't have air frame shear bolts.

 

But this thread wasn't about fasteners, I just brought that up to point out some of the problems buying from Pegasus.

Have never found anything from them, that I couldn't find better, or cheaper somewhere else.

 

I think they made their name back before the internet, and supplied people who had no idea where to find stuff.

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I used to buy all my fasteners and AN hardware from Ted Shulgin. His father was known as the godfather of ecstasy for his work with MDMA. Ted was a trip, but he had everything you could ever want. Including shear bolts.

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In my day (70's) the only way to know about any road racing stuff was whatever I read in Autoweek and there classifieds. What's an internet??

 

Ohh, and did I say it's colder then sht out???

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I'm a stupid old Ohio man. Why would you get junk email from something you viewed in your browser unless you have them linked or something?? I only get junk email from porn sites!!

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It might be coincidence. I haven't looked for or bought one since I replaced the one in my 340 Dart in '71.

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 I only get junk email from porn sites!!

 

How do I get signed up for that ?

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How do I get signed up for that ?

Give me your email address. I'll sign you up!

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I'm a stupid old Ohio man. Why would you get junk email from something you viewed in your browser unless you have them linked or something?? I only get junk email from porn sites!!

My wife noticed after she and her co-workers were sitting around talking about things, they would all get ads on their phones related to what they were talking about. The phones are listening. So I did a test and would randomly talk about things I normally don't (I think it was alaskan cruise or something) and sure enough, I got an ad. I have since gone through all my devices to make sure all the tracking, camera and listening devices are turned off. I also keep my camera on my PC unplugged.

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For what its worth, my 75 610 factory manual lists in the clutch section the clutch cover 'full load' is 450kg (992lb) whatever that means?

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L20B powered 610s and 710s were 450kg clamping pressure..

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Everyone worries about a clutch, but how many people here admit to not having the flywheel ground when you replace it because it "looks good"?  

You can have the flywheel step ground to increase clamping pressure as well - any decent machine shop can do this.  Personally, I made up a rig with a bathroom scale and my shop press to test clutch release pressures and shoot for 310-315 lbs of force (measured on the scale) to release the disc.  You can play with hydraulics to reduce pedal pressure, but this system has always proven effective - even on custom setups like a Mustang clutch on a flathead Ford attached to a T5 with all mechanical linkage.  We use a .015" step ground flywheel with a stock '80 truck clutch in our race truck, although clamping pressure are a moot point when you never get traction.  

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my flywheel is ground with a .005 step, which is pretty insignifigant. im using basically a ka 240sx clutch. 225mm stage 2 ACT pressure plate with a sprung 6 puck. i feel like the pedal is soft but it grips. 

if your in traffic on and off lots it does start to chatter when it gets hot, but it doesnt seem to lose grip. on drag slicks it doesnt seem to slip when i launch it either... 5500 rpm launches is doing some serious 60 foot times on the bottle.  this clutch is rated to 400 ft/lbs and i believe it.  milage wise.. well it Is a metallic clutch so I don't expect it to last super long but it has been in there for a few years now.

 

if I could find the flywheel to run a 7.25 inch twin disc, it would be in the car.

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The RB20 flywheel bolts right up to the KA crank, and there are plenty of OS Giken multi-disk setups floating around on Yahoo-Japan.

 

Here is one closing in less than 3 hours:

ninja_kzk08-img1200x900-1517180177n8a1ho

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Get a 240mm flywheel from a D21 and a 300zx pressure plate.

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I've only ever driven multi disc setups with discs that had no springs, and they were completely undriveable on the street. Or more accurately, they worked well if you basically dumped the clutch. If you let it out normal, the discs would last a month.

 

I didn't know anybody offered those setups with spring dampened discs. That's probably the difference.

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