Ke70 With No Brake Booster

[styler]

I'm trying to suss out a brake setup for the ke25 and would be grateful

if someone could try their ke70 boosterless (ie pull off hose for a min)

and drive around on some open deserted road or open carpark braking

a couple of times under different speeds - in an open area with no cars

or walls of course.

 

if it really is hard pressing on the pedal and the brakes hardly work then

I'm probably going to have to get a remote booster which isnt going to be too much fun.

however if its only a bit more force on the pedal and the brakes pull up the same

then i should be okay.

[anastasios]

shotgun not

[irokin]

Do you want to know if the KE25 master cyl is going to be enough to power KE70 calipers?

[styler]

yeah spot on irokin, i have a ke25 master 17.46mm and ke70 calipers.

 

the ke70 boosted master is 20.64, the rear drum cylinders for ke25 and ke70 are both 20.64mm.

 

the ke25 was boosterless from factory and i don't have space for the typical mounted booster.

 

now i can get a 20.64 master which would replicate the whole ke70 brake system,

however it will be boosterless so id like to know how well a ke70 boosterless system works,

even though the ke25 is a lighter car with a different piviot point on the brake lever arm

it will give a good indication regardless.

 

see what i have found is that boosted systems run a larger master so less travel

is needed on the pedal which is good but the force required is also much greater hence the

booster puts out the extra force required.

 

so I'm just sussing whether a boosted system that has the booster removed is useable

or if its too stiff on the pedal in which case i can use a smaller master to put out more

force it just needs more travel to operate the brakes properly.

 

the ke25 master puts out a great force being much smaller but may run

out of pedal travel before it reaches the full brake travel needed to operate brakes properly.

 

so i thought a road test would get the result i needed

Edited November 7, 2007 by styler

[irokin]

Ive run KE70 brakes on a KE20 with the standard unboosted master cyl. Brakes are a bit softer than standard (half farked brake lines probably didn't help) but its not any more difficult to stop.