ok the VH calipers that i have (same bolt centres as VL ) bolt straight onto sunny struts the small disc brakes(origin??)
early stanza are the same,non girlock
bolted them on again today
just to be sure -to be sure

I have Stanza Brakes on my Datsun Sunny coupe, front Stanza Struts and Stanza rear diff with drums, and made a huge difference , hopefully I get to have a go at Morgan Park. I am praying for the day. I am surprised at the range of opinions, now .
Harry howis the Blue Datsun 1200 Coupe with Mitre Ten going I haven't been out in a while isn't he running Standard brakes all round.

Just bear in mind that HQ discs are 25.4mm thick and commodores are 23mm.
Might be abit of a squeeze getting them over the disc.
They are a tight enough fit on the 24mm Magna disc

that's interesting roddat, i would like to know if HQ discs fit my 240C front end ('a' arms style, similar to kingswood), i could use the VL calipers and slotted and vented HQ rotors for a true bolt on fit under the std 14in rims.

might have to do some measuring on the weekend! Quote:

HQ disks will bolt on to 240k or 200b sx struts but you will have to make up a bracket to suit the vl brakes

u have used the word static in yur description...far enough....but one of the biggest factors affecting braking performance are the tyres.......the coeff of friction between tyre and road.

and another...point......smaller disks give u a bigger range of pedal pressures, (some wrote bigger discs) Big brakes might not even offer better braking. This is because the brake pad may never get into its optimum zone. eg,,, made up brake pad coeff of friction at 100 C = .3, at 200 C = .4
Big rotors may mean the pads never reach 200 C. sure u have more leverage....but..

I am repeating myself from a previous post but again it is relevant to this post as well.

Quote:
These are the basic items that determine braking performance.

Dodgeman said the brakes will either lock the wheels or they will not! This is a basic quality assessment of performance. For his needs this is the most basic requirement of his braking system. (They work or they dont!). I assume that he also requires that the braking be controllable.

L18-B110's points are also qualitiative, as the main consideration is how well the braking performance can be controlled without locking the wheels and for how many applications.

In my opinion and this is not by any means complete, things that help control braking quality are : -

A. Cylinder size ratios between master cylinder and caliper pistons, Boosted or unboosted.
B. Brake pedal leverage ratio of pivot to pedal and pivot to clevis pin.
C Brake pad material composition,
D Disc material and friction surface (slotted etc)
E. Effective temperature range of friction material.
F Ratio of pad clamp diameter to wheel rolling diameter.
G Degree of cooling provided to rotor by venting or ducted air.

I'm sure there are plenty more things I have forgotten, that others can add.

At the risk of repeating myself, i wrote
"If the brakes have the ability to "EASILY" stop wheel rotation, etc."
If you run wide & sticky tyres & run the test under the conditions that the car normally sees' i suggest that you will see my point. If you normally operate on steep mountain passes at high speed, then braking performance would "need" to be diferent than the more normally driven street car.

Larger diameter, ventilated rotors with large, strong & heavy calipers would be a benefit to a car that can justify that kind of braking performance. All this extra stuff adds to the unsprung mass, diminishing ride quality, & if the brake system from a Bathurst V8 Supercar isn't justified, then using them will not be an advantage over a lighter system that "EASILY" performs all braking the needs that your car has.

L18_B110
I re-read my post, & could not find any reference to retaining the stock 1200 discs. What i said, by using the "killing ants" illustration, was that using equipment that is substantially higher in performance [the 2 lb hammer] than the equipment that "EASILY" does the job [the 1 lb hammer] is not going to be a benefit.
In this illustration, the extra weight of some brake systems is likely to be working against us in a street driven car, which is what most of us drive, most of the time.

Ah thanks for that, I was wondering (while driving to work this morning) if brake control fit into it somehow. Makes sense.

Yeah, bigger brakes allow you a broader range of brake pressure to find the point of maximum braking power. Small discs are more "all on" or "all off".

It's about brake control, rather than the ability to lock up the tires on dry pavement.

I agree though that if you can't lock up the brakes, then the brakes are insufficient. For example, a standard 1200 with 4 wheel drum brakes, when carrying a load.