Residual brake pressure valve question.
When I was buying all my bits for the GT's two master cylinder set up Wilwood suggested I get a Residual Pressure Valve for the rear circuit so I did. Their instructions (in the hot link) suggest...
View ArticleRe: Residual brake pressure valve question.
Barrie, your master cylinder is not below the caliper or wheel cylinder, why would you need this?
View ArticleRe: Residual brake pressure valve question.
I only had Wilwood's advice to go on: "Since you’re using rear drums we strongly recommend adding a 10 lb residual pressure valve within 12” of the master cylinder on the rear brake line. This will...
View ArticleRe: Residual brake pressure valve question.
In reply to a post by Wildwood A residual pressure valve is used when a master cylinder is mounted equal to or below the horizontal plane of the calipers or drum brake wheel cylinders. This valve...
View ArticleRe: Residual brake pressure valve question.
Mmm. Perhaps I should have read their blurb (and before posting) rather than relying on their advice (seems in retrospect just a ploy for me to have spent more $). Oh well another $20 to help US...
View ArticleRe: Residual brake pressure valve question.
I think we need a competition, here in Australia, to design and manufacture an object out of excess MGB parts. Will not be very costly for the parts, but the combined freight cost would be astronomical.
View ArticleRe: Residual brake pressure valve question.
Most twin circuit MG master cylinders have such valves built in, which causes it to be a pain to gravity bleed them. "Trap Valve" as they are called. Without such a device, first time you press the...
View ArticleRe: Residual brake pressure valve question.
I tried that once (without trap valve). Pedal gets real long without. The springs in the brake drums tend to retract the brake cylinders far in, especially when new, which makes the pedal long.
View ArticleRe: Residual brake pressure valve question.
I can attest that the residual pressure valve is needed when the M/C is below the floor of the car. When I did my disc brake conversion on the Morris Minor I had a very long pedal before installing...
View ArticleRe: Residual brake pressure valve question.
No, this trap valve is standard for the rear on a dual brake system. Has nothing to do with bleeding. Start with bleeding the right rear, then left rear then right front and last left front.
View ArticleRe: Residual brake pressure valve question.
oh boy another brake bleeding thread haven't seen one of those in a while!
View ArticleRe: Residual brake pressure valve question.
I believe this was directed my way. I think you miss-read my comment. It makes GRAVITY bleeding more difficult. Other methods are no different. As you can see from the Moss diagram, the valves are in...
View ArticleRe: Residual brake pressure valve question.
The residual pressure valve also keeps some pressure on the rear wheel cylinder piston seals and is supposed to also prevent the cylinders weeping brake fluid. Or at least that is what my MG TF...
View ArticleRe: Residual brake pressure valve question.
Barrie it is normal on production cars that have disc / drum setup to have a residual pressure valve in the "drum circuit" built into the master cylinder. Cant do any harm and will improve the pedal...
View ArticleRe: Residual brake pressure valve question.
So I should take Wilwood's advice and insert it around 12" or less from their M/C? It makes a difference because I'll be getting HEL to fabricate lines so at present I'm determining brake line length...
View ArticleRe: Residual brake pressure valve question.
Barrie could it be attached directly to the end of the rear brake master cyl. Denis
View ArticleRe: Residual brake pressure valve question.
If you're using the wilwood dual master doesn't it have the RPV already installed? Mine does
View ArticleRe: Residual brake pressure valve question.
Overall including fittings it's about 80mm long so putting it onto the m/c direct it's unlikely to fit. I found a spare hole in the inner guard about 3" above the rail where it joins the firewall -...
View ArticleRe: Residual brake pressure valve question.
Are you doing track days? A balance bar won't see use on the street after day one adjustments
View ArticleRe: Residual brake pressure valve question.
There are different types of (dual) brake master cylinders. Mine has the round (dual) reservoir and has one residual pressure valve within the rear drum circuit only and I don't think there is a need...
View ArticleRe: Residual brake pressure valve question.
"Are you doing track days? A balance bar won't see use on the street after day one adjustments." I'm not and I know that. I thought long and hard as to two M/Cs v a dual and I chose the former so I...
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