GIRLING 74660152 90s Cat MC replacement ideas

[NSXguy]

7 hours ago, IamScotticus said:

Thanks, Des. 

This looks like the guys:

https://www.powertrackbrakes.co.uk/

 

Which valve did you go with, and, (sometimes we just find out later), was it really needed?

 

Scott- yes that's the place. good folks to deal with. the unit is about 142 GBP if i recall. 

 

The link below has the brake proportioning valve i used. In my case, it made sense to install at the time as i was redoing the lines anyway. If your car will be mostly (exclusively?) street driven, there can be an argument as to wether it's really needed of not to fully exploit the performance of your brake system. But if you track or plan to, it makes a lot more sense to install to optimize the "bias" front to back. I plumbed mine so it is fitted next to the tunnel on the driver's side so i can make adjustments on the fly (if needed). Some people also choose to install them in the engine bay.  Note- they come in different part numbers based on which brake fittings you want to use. the one i shared comes with adapters( 1/8 NPT to 3/8-24 fitting). you can get them to fit m10x1 fittings as well as others. 

 

LINK :    LINK TO WILLWOOD BRAKE PROPORTIONING VALVE- 3/8-24 FITTING

 

-Dez

Edited September 22, 2023 by NSXguy

[IamScotticus]

delete

 

Edited September 22, 2023 by IamScotticus

[IamScotticus]

Brakes...

I think of them the way I think about flying.  I think about the landing.  I think about all the things, and peoole, that need to work in concert and go right.  Not the price, or the baggage fees, or the drinks or food or what group boards first.  I just want to arrive alive.

 

Rant alert:

So when it comes to this car, yea, some things are excessive for a non tracked car.  But a "classic" 7 typically isn't even close to a, say a Porsche you can take off the dealer floor and slay Pikes Peak.  In the case of the live axle 7s  they were cobbled together with the chespest parts that would fit.  Lotus made D'Dion S1s.  They could have made all the 7s fully IRS and race spec.  But that wasn't the purpose of the 7.   The live axles were always a set of compromises and whatever brakes came on them.

So, yes, it makes perfect sense to be able to dial in the rear brake bias for whatever one has back there on a 1200 pound car of which only about 600 lbs is on the rear axle, and 100 lbs is the real axle.  When they heat up and expand, they start grabbing.  This is a known issue.  So, large cylinders and a bias it is.

 

Check first with your local Mortor vehicle regulations to see if they are road legal if you need to pass safety inspections road registration. 

 

 

Edited September 22, 2023 by IamScotticus