4 runner callipers

Post by **sr5 lux** » Wed Mar 18, 2009 9:48 pm

Hi guys does any body know if the v6 4 runner calipers have bigger pistons than the wons fitted to a rn 105 hilux,as i am doing a rear disc conversion and i am using 80 series mc and booster and suby rear callipers on gq discs.thanks

Post by **-Nemesis-** » Wed Mar 18, 2009 10:19 pm

Yes bigger

Post by **sr5 lux** » Wed Mar 18, 2009 10:37 pm

Thanks Nemesis would you or anybody else know if i have to change fronts to v6 runner type if running 80 series booster and mc .

Post by **-Nemesis-** » Wed Mar 18, 2009 11:41 pm

You don't have to, but if you're doing the MC etc then it would be a good idea. Probably give a bigger noticeable braking upgrade then the rear discs will

Post by **ferrit** » Thu Mar 19, 2009 6:16 pm

i believe the turbo surf ones are the big calipers too- What diameter pistons do the V6's run?

Post by **-Nemesis-** » Thu Mar 19, 2009 6:21 pm

Dunno the measurement but you're right, turbo Surf is the same.

Post by **ferrit** » Thu Mar 19, 2009 6:24 pm

*removes his pair of surf turbo calipers from the "for sale" Pile!*

Post by **thehanko** » Thu Mar 19, 2009 6:40 pm

can you stick v6/turbo front calipers straight onto a good ol ln106 lux front end?

do you need to change anything else? and how much difference will it make? my brakes suck.

Post by **sr5 lux** » Thu Mar 19, 2009 7:21 pm

Hi all not all v6 4runners run big pistons as i have just found out.i have a RN 105 hilux and the piston size is 42mm i just bought supposedly v6 bigger piston calipers which are the same size. only some v6 runners come out with the bigger piston which is 45mm.not sure what models if any body knows could you let me know thanks

Post by **Mr DJ** » Thu Mar 19, 2009 8:41 pm

Same goes for the TD Surfs, mine only has the 40mm pistons (what I measured with tape measure so may actually be 42mm) and am after some 45mm ones if anyone has some

Think from 92 on the Surfs had the 45mm calipers.

Post by **sr5 lux** » Thu Mar 19, 2009 9:00 pm

do the surfs have the 45 mm piston callipers thought it was only v6 runners

Post by **-Nemesis-** » Thu Mar 19, 2009 9:14 pm

The Surf I wrecked was a 93 model 2.4TD and had the V6 calipers.

Post by **sr5 lux** » Thu Mar 19, 2009 9:21 pm

Does any body have a set of callipers with 45mm pistons for sale

Post by **brad 93hilux** » Fri Mar 20, 2009 12:34 am

thehanko wrote:can you stick v6/turbo front calipers straight onto a good ol ln106 lux front end?

do you need to change anything else? and how much difference will it make? my brakes suck.

I got the V6 booster off nemesis, with my LN106 callipers new pads front and rear, and lifted the brake bias arm up on the rear, i noticed a difference.

My lux failed the brake test for rego and with this easily passed, my brakes basically lock up with 33's now.

And yes the different callipers bolt straight on, but calliper may touch inside of some rims (can fix this with a grinder but

)
Brad

Post by **thehanko** » Fri Mar 20, 2009 9:23 am

brad 93hilux wrote:
thehanko wrote:can you stick v6/turbo front calipers straight onto a good ol ln106 lux front end?

do you need to change anything else? and how much difference will it make? my brakes suck.
I got the V6 booster off nemesis, with my LN106 callipers new pads front and rear, and lifted the brake bias arm up on the rear, i noticed a difference.

My lux failed the brake test for rego and with this easily passed, my brakes basically lock up with 33's now.

And yes the different callipers bolt straight on, but calliper may touch inside of some rims (can fix this with a grinder but )
Brad

so you kept the standard calipers but put a better booster on? makes sence, as mine seems to take too much pedal pushing to get enough brake power.

noob q though. whats a brake bias arm, where to i find it and how dio i raise it

Post by **sr5 lux** » Fri Mar 20, 2009 12:42 pm

Brad did you do a conversion with discs all round or did you just change the booster.

Post by **brad 93hilux** » Fri Mar 20, 2009 9:29 pm

thehanko wrote:
brad 93hilux wrote:
thehanko wrote:can you stick v6/turbo front calipers straight onto a good ol ln106 lux front end?

do you need to change anything else? and how much difference will it make? my brakes suck.
I got the V6 booster off nemesis, with my LN106 callipers new pads front and rear, and lifted the brake bias arm up on the rear, i noticed a difference.

My lux failed the brake test for rego and with this easily passed, my brakes basically lock up with 33's now.

And yes the different callipers bolt straight on, but calliper may touch inside of some rims (can fix this with a grinder but )
Brad
so you kept the standard calipers but put a better booster on? makes sence, as mine seems to take too much pedal pushing to get enough brake power.

noob q though. whats a brake bias arm, where to i find it and how dio i raise it

Yeh my master cylinder was fine, the V6 model are a double diaphragm booster (the same as a 80 series one i think)

The brake bias is basically a valve on the rear of your truck (just above your rear diff on the right hand side) it has a rod that comes off and bolts to a bracket on the LHS of your diff. Basically (in standard form) the more you load up your 4by the rear springs will sag and basically what the bias valve does is the more is sags the more the rod lifts up and the valve allows more brake fluid pressure to your drums, thus they work better for when you have a bigger load.

Thats the idea (if it makes sence) so if you have lifted your truck eg- 4" then the point on your diff where the arm comes out of the valve to the diff and bolts on with two bolts a 4" extension bracket needs to be made to allow the valve to work as it did from factory.

yeh it is a good idea to get the V6 callipers as well as it will be more effective, but mine are fine as it is.

No i don't have discs all round, i was looking on the Locktup web site and seen the disc brake conversion kit for the rear of the lux.. might give it a go in a bit but have no need for it ATM. I moved to WA for work for a short period of time and have changed to 32's for now

copps did not like me here.

The other thing is if you have a earlier model lux (i think the petrol 4cyl and 2.4 diesel) they have alot smaller drum brakes on the rear also.
My LN106 2.8 diesel have the same larger ones (same as 2.4TD) as the 6cyl model.

So might be worth looking into that as well if it is yours.

Brad

Post by **brad 93hilux** » Fri Mar 20, 2009 9:40 pm

Basically before i done it my rear drums were not even working, so this with the new booster, new pads front and rear, lifted brake bias bracket, machined f&R drums/ discs, new rear wheel cylinders, and all blead properly i actually could stop.

But if you wanted it better again find some V6 callipers.

Brad

Post by **dow50r** » Sat Mar 21, 2009 8:41 am

Gday
I got a pair of v6 callipers from a aussie wreck, and the pistons were 45mm, to measure them you really need to pop one out...the part that pushes against the pad is different sized. The v6 calliper is identified by a wider disc appeture, as they run 28mm discs. This does not interfere with their operation on a std 20mm disc. They also have a wierd fingerprint pattern on the outer side nearest the hub.
I ran these plus 80 booster master on a 60 series with 35's with an awsome pedal, a bit light if anythig, i could lock up fronts without too much pressure at all.
Andrew

Post by **sr5 lux** » Sat Mar 21, 2009 9:53 pm

Thanks for the replys guys every v6 calliper i have found has been 42mm.imust keep looking.Andrew would you be able to put a picture up of the v6 one as wreckers dont like you pulling pistons out.Just to see what they look like as in difference.Thanks Pat

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