socorob Posted August 28, 2013 Share Posted August 28, 2013 Been reading trying to figure out what length clutch line to get. Today I will be passing a speed shop that's a little over an hours drive from here and has cheap -AN lines and fittings. I will be using the Wilwood master. I've seen people using from 32-48" lines. What's a decent length that can be strapped down nicely and does anyone happen to know the thread in the Wilwood? Quote Link to comment Share on other sites More sharing options...
SUNNY Z Posted August 28, 2013 Share Posted August 28, 2013 This topic has come up several times.... Quick search reveals.............. http://forums.hybridz.org/topic/113994-clutch-hydraulics-question/?hl=%2Bclutch+%2Bline+%2Blength Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted August 29, 2013 Share Posted August 29, 2013 (edited) SunnyZ's link takes you to our last discussion on this topic. Take his scolding as a noogie from a big brother-it was cool that he included the link. If you can get the line with a 90-degree bend in it, 32" is great. If you have to get one with a straight fitting, I would do 36" - you want a little slack in it for vibrations. The Wilwood MC uses a 1/4" NPT fitting. You will then need an adapter to go from the 1/4" NPT to AN3, which is what your line will be. I get most of my AN fittings, lines and stuff from speedwaymotors.com or Summitracing.com. They both ship really fast. When looking for a line, look in the catalogues in the LS section, brake section, and clutch sections to see all the different styles available. I really like the Tilton MCs because they use AN3 and all their MCs come with the adapter, so you don't have to buy anything extra. Other than that, they are pretty much equal products. I went thru like 5 MCs before I got a good one-the quality control on these MCs is terrible-either that or I was sucking the seals to death with my vacuum bleeder! Make sure you get a speed bleeder in your clutch remote bleeder line-I recently converted all my hydraulics (clutch and brakes) to speed bleeders and life is wonderful. I can't recommend them enough. I got my remote bleeder with speed bleeder from eastcoastperformance.com. The 18" remote bleeder from speedway is too dang short-you gotta get under the car to bleed it. Much more fun if your bleeder is higher than the slave cylinder (air rises) so longer is better (no dirty jokes). Last thing: change (cut and weld) the nut on the Datsun clutch clevis so that you can use the longer wildwood push rod included with the MC. For me, the Datsun push rod was just short enough to give me limited clutch pedal throw, which kept my clutch from fully disengaging-resulting in poor high rpm shifting and a burned up clutch and warped flywheel. You need all the travel you can get. Get 'er done and lets race! Edited August 29, 2013 by RebekahsZ Quote Link to comment Share on other sites More sharing options...
socorob Posted August 29, 2013 Author Share Posted August 29, 2013 I picked up a 36 because they had up to 30 then it jumped to 36. I just must not be able to search this site well because I read tons of threads but didn't see that one. On summit's site they said the port on the wilwood was 3/8-24 so I guess I picked up the wrong one. I had a wilwood clutch master and pull slave I put into my last car. The master was fine but I had to rebuild the slave in under 2 years. I'm getting really close to being able to get seriously moving on this. I'm just lacking Several small detail items and in about 2 weeks or so the lift will be freed up and then its on. i got my floors all patched, welded bad dog rails in, and bent up new seat brackets for Miata seats on the brake and made them low enough to keep my head off the roof even with a helmet on. My goal is to be driving before it gets too cold. Quote Link to comment Share on other sites More sharing options...
Naptown Dave Posted August 29, 2013 Share Posted August 29, 2013 ^ what he said ^ Good write up Keith! I think I went with a 30" and it was a bit too short so I ended up making a 90* bend at the master with tubing before hitting the braided line. If I do it again I would probably use a shorter braided hose for the flex and run hard tube closer to the slave because my fuel line and brake plumbing make that area pretty crowded. I think there may be something wrong with me because I kinda like running tubing. Quote Link to comment Share on other sites More sharing options...
Domzs Posted August 29, 2013 Share Posted August 29, 2013 Seems like most people are using AM master cylinders , what is wrong with Datsun master ? It would be cheaper and easier to replace . Quote Link to comment Share on other sites More sharing options...
socorob Posted August 29, 2013 Author Share Posted August 29, 2013 I have read on LS1 tech that people go one size up over stock if they run high performance clutch setups. Apparently the stock GM is just enough to work? Quote Link to comment Share on other sites More sharing options...
Domzs Posted August 29, 2013 Share Posted August 29, 2013 (edited) I'm using stock Datsun master on my 83 ZXT with stock clutch ( I think , came with motor/trans ) . Edited August 29, 2013 by Domzs Quote Link to comment Share on other sites More sharing options...
socorob Posted August 29, 2013 Author Share Posted August 29, 2013 I think the gm one is 3/4" . if the Datsun one is the same I may leave it to save some work and $$, if it looks like its in shape to last a while. I think the Wilwood is 13/16. Quote Link to comment Share on other sites More sharing options...
Domzs Posted August 29, 2013 Share Posted August 29, 2013 With Datsun master , you can buy it from local stores and lifetime warranty from most stores . I haven't had any problem with it , yet . All you need is a line from Speedway and a fitting ( AN on one end and Datsun hard line on the other ) . Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted August 29, 2013 Share Posted August 29, 2013 If you have a short throw from a short push rod and an ovalized hole in the clutch pedal you need a bigger diameter MC. If everything is fresh you can run a smaller diameter MC. Smaller MC gives lighter pedal. I have a sore foot after racing with a 1" MC-but I need it for good disengagement. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted August 29, 2013 Share Posted August 29, 2013 Datsun is 5/8 IIRC. The aftermarket ones are pretty cheap and I think my Tilton came with AN adapters, which is nice. The issue with the smaller one is that you might not get enough throw on the slave. The issue with a larger one is that you might get too much throw on the slave. Quote Link to comment Share on other sites More sharing options...
socorob Posted August 30, 2013 Author Share Posted August 30, 2013 I had to put a pedal stop on my other car because I was worried about over traveling it. Quote Link to comment Share on other sites More sharing options...
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