Fitting 34 Brembos To A 32 Gtr

[Roy]

Whats it matter is the rotor face isnt beign wiped? Ideally you would have a larger alloy hot making the whole assembly lighter. But at the end of the day it wont encourage the rotors to warp. The pad is still in full contact with a rotor. Whats the problem?

PS, yes i know its not ideal, but hell...dollars saved sort of thing. I dotn know of many cars that stop better at the track then my hack setup

[djr81]

Whats it matter is the rotor face isnt beign wiped? Ideally you would have a larger alloy hot making the whole assembly lighter. But at the end of the day it wont encourage the rotors to warp. The pad is still in full contact with a rotor. Whats the problem?

PS, yes i know its not ideal, but hell...dollars saved sort of thing. I dotn know of many cars that stop better at the track then my hack setup

Like you say it is not ideal. I like to think if I am going to have to lug around kg's of cast iron lumpen rotors atleast they can be doing something useful. The inner radius of the pad shows it to be designed for a smaller rotor. There again I guess you don't buy Wilwood rotors & DBA non hatted rotors unless you are doing it on the cheap. I don't like the stuff much, but by god it is cheaper than Brembos etc & at the end of the day it still works.

[T04GTR]

they will crack from hoop stress. thats how i killed some 355mm rotors in 3 days of "testing" i went from a wide evo pad to a pfc carbon metalic about 10mm shollower and if f**ked them quicksmart.

well so kev at sbc tell me

[T04GTR]

but they were orange a few times lol

[Beer Baron]

ok, well on the 34 brembo front. dave has convinced me heli-coil is the way to go. the dude at coventry of course told me it couldn't be done. but i've done some research and it seems coilthread make an insert 12X1.25 which require a hole size between 14.3 and 15.0 which should be perfect. I'll just run their tap through the current thread a few times and it should be apples.

now, does anyone have a M12X1.25 heli-coil kit I can borrow? (I'll buy the 4 coils I need seperate), I have a 10mm kit somewhere (with tap, drill bit, install mandrel tool) but none of it will be any use for the 12mm coils.

[Bunta]

I hope there is some advantage as they are not that cheap! i'll cling to the faint notion of a stiffer caliper.

You will like them Richard, I recently bought some (Well mine were R33 Brembos but they are the same apart from colour aren't they?) and was worried, but the difference is amazing, It seems now that it is easier to feel a lockup coming on and do something about it, also the initial bite is better

[Beer Baron]

well an little update for those that care (no one I imagine!).

as usual Dave was right the heli-coil will be fine. I've bought the heli-coils i needs, and sent the rotors off to be machined.

last night I tried out by hand and I can screw the heli-coil in a thread or two just by hand. so now I just need to borrow the tap to cut the thread a little and the mandrel to insert the coil and i'll be in business. this should be a much nicer way of fitting them than drilling out the hub.

i've also bought an R33 GTR master cylinder which is on it's way.

[sav man]

how much did the R33 master cost? I want one for my car

Edited May 9, 2007 by sav man

[Kaido_RR]

nice read, question for beer baron, wouldn't it have been easier and possible cheaper to just buy some sort of bolt on kit for your R32? (for example Ap Racing Kit).

When i was looking at upgrading to R34 or R33 GTR Brembos i found the price for a complete set (disc,pads,calipers, lines etc) was about the same if not sometimes more $$$ then just buying a complete kit?

Cheers Michael

[Beer Baron]

that's a good point. but I bought the following:

a set of 34 brakes (included 4 X calipers, 4 X rotors, all pads, all brake lines).

out of that I'm going to throw out the lines (re-use my 32 GTR nismo lines), throw out the brembo pads (switch to something more suitable for me), and machine the rotors (they are about 50% worn).

and I needed 4 heli-coils (bought a pack of 10 for $15).

and I bought a 33 GTR master which cost around $120.

now an AP or Brembo front and rear kit for 32 GTR is up around the $8000-$10000 mark depending on which particular caliper and what size rotor you want. It will be better, no doubt about it. But so far I have only spent less than a third of that $$$. and that includes

savman, the 33 master I bought second hand. Think it cost me around $120.

[djr81]

To be fair, Baron, you are comparing new with used.

Also much of what AP & others offer retains the Sumitomo rears & the standard master cylinder. So you don't HAVE to spent all that money. You can get a new front AP kit with 330ish rotor for less than $3k.

Nonetheless if you can get the job done for that kind of money with 4 new calipers that is pretty good going.

[Beer Baron]

oooh, look what I saw.

[sewid]

Hmm look like 12mm bolts with a sleeve to me... Have you taken that picture to coventry to see if you can get something off the shelf?

[Beer Baron]

To be fair, Baron, you are comparing new with used.

Also much of what AP & others offer retains the Sumitomo rears & the standard master cylinder. So you don't HAVE to spent all that money. You can get a new front AP kit with 330ish rotor for less than $3k.

Nonetheless if you can get the job done for that kind of money with 4 new calipers that is pretty good going.

yeah that is true. we are talking new vs old. but even a used F+R big brembo or AP or Alcon kit is going to run to $4-$5K which is more than double what I've spent. BUT it's likely the other kit would be better.

you're right I could have just done the fronts for around $3-$4K but even then it's still a lot more than this gear cost. and I would still be on my standard rears, and I do know of many people who have suffered after doing just a front upgrade and then had to spend lots of time trying to get some balance back.

this is the poor mans upgrade!

[sewid]

Poorer men would've bought R33 brembos... LOL

[Beer Baron]

Hmm look like 12mm bolts with a sleeve to me... Have you taken that picture to coventry to see if you can get something off the shelf?

yeah, they are no good for what I want. but just interesting as it was the concept I was talking about before. using a smaller bolt with sleeve. they make these for people will cars like 34 GTT that have 14mm holes, but want to use 33 GTR brakes that need 12mm bolts.

and yeah, I've gotten the heli-coils I need now. and it will be a piece of cake to fit the 34 brembos to the 32 GTR without permanently modifying anything.

[Beer Baron]

Poorer men would've bought R33 brembos... LOL

haha, to be honest I would have preffered the 33 brembos as they are black, and I wouldn't have to helicoil them. but on the other hand the gold isn't too bad, and the 34 calipers are newer. so it's much of a muchness.

[Roy]

You can get a new front AP kit with 330ish rotor for less than $3k.

I havent seen any AP 4 pot kit go for that sort of money. At best they would be a kit using AP calipers, but i doubt they woudl be using AP rotors/hats/radial mounts etc.

[Beer Baron]

lol, and believe me it's not for want of trying. I think troy spends an hour a day looking for brakes.

[djr81]

I havent seen any AP 4 pot kit go for that sort of money. At best they would be a kit using AP calipers, but i doubt they woudl be using AP rotors/hats/radial mounts etc.

The kit as I understood it was for a non hatted rotor with a CP5200 caliper. Don't remember how much other fruit came with it - ie pads and or braided lines.

I do know of a cheaper option than that which is basically the cheap arsed AP caliper that HSV etc use on a DBA rotor. I am not sure that constitutes an upgrade however....