Cascade Crew

Alphius · Posted: Tue Mar 26, 2013 5:47 pm Post subject: Brake Master Cylinder

Seems my master cylinder has started leaking around the reservoir seal. Unsettling. I want to take this opportunity to upgrade to a 4th gen master cylinder. What's the best option here?

Also I'm gonna tee my front brake lines so I don't have a big ugly gutted prop valve sitting there doing not much. I just need a flare tool and a tee for this right? What kind of flares do I need to make? What kind of tee do I buy?

I don't feel like wading through TGO or doing this by trial and error, so if anyone has any insights feel free to share. Very Happy

Thanks.

chevymad · Posted: Tue Mar 26, 2013 5:52 pm Post subject:

Just by an inverted T and use double flares. No reason to do anything more fancy.

aaron_sK · Posted: Tue Mar 26, 2013 6:39 pm Post subject:

I did do the fancy thing and used a line lock instead of the tee... but Brandon is totally right. Laughing

I put a late fourthgen master on a thirdgen booster no problem. Apparently the later ones are better? Shrug

Heck if I know, but you rode in it and it stops just fine.

Alphius · Posted: Tue Mar 26, 2013 7:39 pm Post subject:

OK, I'll just snag a 98-02 master and bolt it onto my booster. Should get something decent that way. Very Happy

EDIT: Some research indicates that I will probably want a 98-02 LS1 master cylinder because it is the best. Actually I just don't think I want that residual pressure valve doohickey.

iansane · Posted: Tue Mar 26, 2013 8:53 pm Post subject:

Plus the LS master lets your retain the low fluid indicator because it's moved into the reservoir.

I was going to say you won't have to get different fittings but I don't know if the early cars are different from the late cars?

aaron_sK · Posted: Tue Mar 26, 2013 9:10 pm Post subject:

I just bought adapters from bubble to flare and then used pre-flared line north of the tee and prop valve. Far easier than making additional flares on the stock lines IMO.

Alphius · Posted: Wed Mar 27, 2013 7:43 am Post subject:

I will probably reflare the stock lines and screw them into a tee instead of messing with adapters. I did it that way years ago when I installed my Wilwood.

My lines should work on the LS1 master, I am pretty sure mine is late '84 production which matches the Metric bubble flare used on later cars. My basis for thinking this is that my rear brake flex line just screwed right into my late 4thgen 3-channel rear brake hardlines.