Wilwood Master Cylinder Install...in progress

[ModernMuseum]

I have a few questions about a Wilwood master cylinder install.

I ordered a kit for a Willwood master cylinder and hydroboost for a 69 firebird.

Wilwood 260-8556-B master
3023 Wilwood Hydroboost

I'm installing it right now and don't want to do things twice, so I have a few questions.

1) Is this little rubber boot on the master cylinder shaft necessary? Is it some sort of seal? When I install it, it gets all scrunched up inside the hydroboost housing and doesn't look right. Should I install it on the MC first?





2) Do I need to make my own gasket for the interface between the master cylinder and the HB unit? Seems strange that this setup wouldn't come with a gasket.

3)
I did some measuring and don't think I need this little extension piece. Without it, it looks like there will be a ~1/8-1/4" gap between the HB pusher and the bottom of the hole of the Master cylinder unit. I'm guessing there is supposed to be a little gap so the HB arm will retract all the way without touching the master cylinder piston.

[Hydratech®]

I happened to be surfing through and saw this - yes, my name is Paul, and I have an auto addiction.

Wilwood hydroboost? TYPO..! Hydratech Braking Systems Model # 3023 http://www.hydratechbraking.com/GM_1stgenF_Body.html

The pics don't show it all too clearly, but I recognize that you have one of our latest systems using the improved 2011 Bosch production units! I'm curious to know what your feedback may be of the level of finish, quality, and overall preparation? You might not see it right off (especially in these pics), but there are over 6 hours of highly skilled meticulous show preparation that goes into each system during production. Something most people don't know is that I personally do all of the final assembly and preparation / detailing / order review, so your feedback falls right on the target.

Here are the answers to your specific questions:

1) The rubber boot is provided with the Wilwood MC in case you where planning on running this MC in a manual brake application in an underfloor mounting (where it might be exposed to road grime). It is not used in a power brake application (neither vacuum nor hydraulic assist).

2) There is no gasket, or need for such, between the master cylinder and the brake assist unit. The master cylinder is to bolt directly to the face of the brake unit - metal to metal.

3) This Wilwood MC design is dimensionally a '68-'76 C3 Corvette MC, running the early / deep GM MC pushrod spec. Wilwood provides that aluminum spacer bullet / slug with their MC in case you were possibly running a late / shallow GM pushrod spec. Our system # 3023 is set up for use with the early / deep GM MC pushrod interface, so the spacer is not needed in your installation. The above being stated, take the rubber boot and the spacer bullet / slug and toss it into your spare parts bin as extra unneeded parts with this combo. The Hydratech Model # 3023 is an out of the box bolt on "plug n play" for the Wilwood 260-8556 MC.

Here is some further related reading:

https://lateral-g.net/forums/showthread.php4?t=17060

You have one of our latest HIGHLY IMPROVED models, so let me know what you think.

[ModernMuseum]

Paul,

Thanks for the timely and lengthy response!! I'll do what you recommended with the extra parts. I'll also post back here when I have everything said and done.

I also just purchased (a few minutes ago) the following proportioning valve from Wilwood. Is this valve a good choice? It seemed like the best valve for the application since it has the pressure switch integrated.

I've seen it recommend to mount it way down low, but I was thinking of mounting it directly on the master cylinder or within its close proximity.



Part# 260-11179


ps. sorry about the Wilwood Hydratech typo

[Hydratech®]

This particular Wilwood proportioning will be fine - mount it anywhere you like, as you are the artiste' and the vehicle is your canvas.

It will function appropriately wherever you may wish to install it.

[ModernMuseum]

Sweet. Thanks a lot Paul. Looks like it's time for me to get back to work

[Bowtieracing]

Originally Posted by ModernMuseum

...I also just purchased (a few minutes ago) the following proportioning valve from Wilwood. Is this valve a good choice? It seemed like the best valve for the application since it has the pressure switch integrated.

I've seen it recommend to mount it way down low, but I was thinking of mounting it directly on the master cylinder or within its close proximity.



Part# 260-11179

That one looks really nice. I prefer the "oem" looks over the basic billet ones.