G4 / D2 8 Piston Brakes - The Diffinitive Review

[R31Nismoid]

They are cheap and nasty but if they do they job ok I suppose that is ok?

How are they nasty exactly? Because of the colour?

If they have been proven on club level circuit cars to be perfectly fine then they are fine for anyone else at that level too. Perhaps at the pinnacle/upper end there might be some difference that warrants a price tag 3x the amount.

When you consider what the equivalent Alcon setup costs - you could buy TWO sets of these (say one dies in 3yrs) and still be infront.

Some stuff outta china/taiwan is certainly rubbish and i'd say away too - however the brakes seem to be fine and are in use on a good number of cars doing some very fast times.

[FineLine]

How are they nasty exactly? Because of the colour?

If they have been proven on club level circuit cars to be perfectly fine then they are fine for anyone else at that level too. Perhaps at the pinnacle/upper end there might be some difference that warrants a price tag 3x the amount.

When you consider what the equivalent Alcon setup costs - you could buy TWO sets of these (say one dies in 3yrs) and still be infront.

Some stuff outta china/taiwan is certainly rubbish and i'd say away too - however the brakes seem to be fine and are in use on a good number of cars doing some very fast times.

I went brand whore with brakes and I regret it.

When I sit and look at what I got for not much short of 5 k for fronts only my arse starts to bleed.

Given the time over and the testimonials of those using the alternatives I would have no qualms in saving a shitload of coin and using them myself.

[woolls]

I have been running the G4 356mm kit on my R33 Gtst circuit car for 4 Years.(running 440kw)

The only thing I didn't like was the supplied brake lines, but i had new ones made up.

I have just replaced the rotors after 4 years of use.

bang for buck they are great.

[R31Nismoid]

You got 4 years out of a set of rotors with 440kw? Holy shit...

What type of pads? They couldn't have been very agressive?

My DBA4000's lasted about 5,000kms with DS3000 pads and that was just street driving and the old owner doing i think 2 track days.

But yes agree - brake lines probably an issue. Most people already have them anyway. I will reuse the ones i have.

[Deano 1]

any one the best place to get front and rear Ksport brake kits?

[woolls]

You got 4 years out of a set of rotors with 440kw? Holy shit...

What type of pads? They couldn't have been very agressive?

My DBA4000's lasted about 5,000kms with DS3000 pads and that was just street driving and the old owner doing i think 2 track days.

But yes agree - brake lines probably an issue. Most people already have them anyway. I will reuse the ones i have.

Only 12 months with 440, was mostly 300.

I have only ever ran the G4 green race pad. They work really well.

[R31Nismoid]

The pad they come with outta the box?

I've heard they are no where near as harsh, and hence don't stop as well as more agressive pads so that would make sense as to why you've had some decent life.

Also a GTS-t so there is less weight etc. Not a bad life survival - I'd certainly expect a lot less based on past experiences with many rotor/pad combos

any one the best place to get front and rear Ksport brake kits?

Rear seems not to matter. Infact people leave the stock rears in most cases I've seen

JJap have them in stock - But give me a month, I'm getting pricing for the GB. If it isn't decent/worthwhile then i won't bother.

I also want to get a kit and trial it mself to ensure it fits 100% first from the supplier chosen. Nothing worse than getting them and it's all fked up.

[pistol-pete]

will you be fitting them on your gtr nismoid?

id be interested in a GB if the improvement over 33gtr brembos was big enough

[woolls]

The pad they come with outta the box?

I've heard they are no where near as harsh, and hence don't stop as well as more agressive pads so that would make sense as to why you've had some decent life.

Also a GTS-t so there is less weight etc. Not a bad life survival - I'd certainly expect a lot less based on past experiences with many rotor/pad combos

Rear seems not to matter. Infact people leave the stock rears in most cases I've seen

JJap have them in stock - But give me a month, I'm getting pricing for the GB. If it isn't decent/worthwhile then i won't bother.

I also want to get a kit and trial it mself to ensure it fits 100% first from the supplier chosen. Nothing worse than getting them and it's all fked up.

They come with the street pads which are shit, but they also have a race pad.

[Duncan]

It's funny. Read through this thread, the people who put shit on these brakes have not used them. Everyone who has used them says they are good, including some really harsh use like rallies and racing. Pretty simple odds.

I always run the supplied pads in mine, I got the kit from Just Jap and they had a choice of street, sport or race pads. I run the race pads on the race car, and sport in rallies or on the street. No problems at all and I still haven't had to replace rotors (I have replaced pads a few times).

[R31Nismoid]

will you be fitting them on your gtr nismoid?

id be interested in a GB if the improvement over 33gtr brembos was big enough

Yep. My own car will be guinea pig.

Although that said the owner of Racepace has D2's on his GTR that have run fine at ALL the track-days attended (he's even run PB's since installing brakes) over the last year and this is what's convinced me i might as well as im looking to upgrade.

Although I'm getting them via a different supplier and they are KSport - although no real difference.

The advantage will be going up in rotor size as I'll be getting the 356mm kit. Not even going to waste time with the 330 as IMO just stick with stock brembo's for that as ksports do not offer much of a gain. It's the larger overall that is viable from what ive investigated.

Plan is to be going from Brembo/OEM 330mm DBA4000/DS3000 to KSport 356mm/DS3000

I'll update more when its all done and dusted.

[BoostdR]

Yep. My own car will be guinea pig.

Although that said the owner of Racepace has D2's on his GTR that have run fine at ALL the track-days attended (he's even run PB's since installing brakes) over the last year and this is what's convinced me i might as well as im looking to upgrade.

Although I'm getting them via a different supplier and they are KSport - although no real difference.

The advantage will be going up in rotor size as I'll be getting the 356mm kit. Not even going to waste time with the 330 as IMO just stick with stock brembo's for that as ksports do not offer much of a gain. It's the larger overall that is viable from what ive investigated.

Plan is to be going from Brembo/OEM 330mm DBA4000/DS3000 to KSport 356mm/DS3000

I'll update more when its all done and dusted.

Interested in the 356mm

[MrStabby]

My DBA4000's lasted about 5,000kms with DS3000 pads and that was just street driving and the old owner doing i think 2 track days.

But yes agree - brake lines probably an issue. Most people already have them anyway. I will reuse the ones i have.

DS3000s are really abrasive cold, so even though they bite well, they destroy rotors when used for street. EBC yellows dont bite well cold but they dont eat rotors either. I dont know how they compare back to back for track work, because i've only ever used the golds with my G4 330s (and was happy with them - only about $320 for set plus a little grinder work to make them sit deeper in the caliper so they didnt overhang the rotor).

[Checkbuzz]

Well apart from chatter on UK websites from brake specialists they do a pretty convincing job in the brochure that came in the box; including photo's of their CNC mills, brake balancing and durability machines etc at their 13000 square meter factory in Taiwan where they "engineer and manufacture high performance shock absorbers and brake systems"...

So no hard evidence I guess, just lots of very convincing stuff.

I can't comment on the other brands except to say that K Sport seem to rule in the UK and US where D2/G4 don't appear to be as popular.

Either way my new K Sport kit was delivered today and it certainly looks very well engineered & packaged!

I'm happy with what I paid for the kit which was considerably less then the on-line advertised price

I've also got some slotted DBA4000's, Hawk pads and new seal kit for the rears plus RB74 pads for the 8 pots so braking should be well and truly sorted!

FYI - Some one I heard of got the rear K Sport kit as well as front but ended up having to use a brake bias valve to stop the rears locking up all the time so they may be a bit over kill.

I got quoted $4500 at one place for a K Sport full 330mm front and rear kit which keeps the factory handbrake set up but I think it's a bit too much. With the bigger front rotors etc the rears tend to do even less work. Stock size rear rotors, calipers and decent pads should cover it for most street/track purposes at a fraction of the cost.

Good luck with the GB dude.

K-sports/D2 are all the same dude as they come in exactly the same box and so on. You'd take a fair stab it's the same factory.

Do you have hard evidence to suggest otherwise?

Hope you didn't pay too much though (PM me the price if you want). The KSport GB i've been trying to get off the ground looks like it might almost be possible

Either way they certainly cannot be beaten for the price.

Scotsman recently did a 1:19 around Sandown with 320rwkw or so and those brakes. Obviously with uprated pads. Proof is right there in my books and he's done a number of track days now without an issue

Edited April 14, 2011 by Checkbuzz

[Checkbuzz]

Well I guess all the research in world can't beat real life experience and I am very disappointed with K Sport.

At the end of the day you only get what you pay for and when it comes to K Sport that means a poor quality product and zero customer service/warranty support even when purchasing through a large retailer such as JustJap

One of the brake rotors supplied had a run out at least 0.1mm (Nissan and K sport both specify 0.05mm is the maximum allowable run out) so after spending hours removing studs and cleaning up the hub assembly asssuming the problem must be with my car I measured the hub which was with in tolerance <0.02mm, marked the high point on the disk rotor, turned it 180 degrees only to find that the high point was still the high point i.e. it was the disk that was out of tolerance!

OK everybody makes mistakes right (although I'd argue that brake component manufacturers do not really have this luxury) so I contact JustJap who are very helpful and organise a courier pick up of the disk and it's return to K Sport.

K Sport call me and I give them a run down of the problem, they say they wil look at it and see what they can do...

A few days later the very same faulty disk rotor that I sent them is returned with; no paper work or any other repair information and the same run out problem!

I am out of pocket $2K, my car has been off the road for over a month and I am f**king pissed off!!!

Well apart from chatter on UK websites from brake specialists they do a pretty convincing job in the brochure that came in the box; including photo's of their CNC mills, brake balancing and durability machines etc at their 13000 square meter factory in Taiwan where they "engineer and manufacture high performance shock absorbers and brake systems"...

So no hard evidence I guess, just lots of very convincing stuff.

I can't comment on the other brands except to say that K Sport seem to rule in the UK and US where D2/G4 don't appear to be as popular.

Either way my new K Sport kit was delivered today and it certainly looks very well engineered & packaged!

I'm happy with what I paid for the kit which was considerably less then the on-line advertised price

I've also got some slotted DBA4000's, Hawk pads and new seal kit for the rears plus RB74 pads for the 8 pots so braking should be well and truly sorted!

FYI - Some one I heard of got the rear K Sport kit as well as front but ended up having to use a brake bias valve to stop the rears locking up all the time so they may be a bit over kill.

I got quoted $4500 at one place for a K Sport full 330mm front and rear kit which keeps the factory handbrake set up but I think it's a bit too much. With the bigger front rotors etc the rears tend to do even less work. Stock size rear rotors, calipers and decent pads should cover it for most street/track purposes at a fraction of the cost.

Good luck with the GB dude.

[MrStabby]

Well I guess all the research in world can't beat real life experience and I am very disappointed with K Sport.

At the end of the day you only get what you pay for and when it comes to K Sport that means a poor quality product and zero customer service/warranty support even when purchasing through a large retailer such as JustJap

One of the brake rotors supplied had a run out at least 0.1mm (Nissan and K sport both specify 0.05mm is the maximum allowable run out) so after spending hours removing studs and cleaning up the hub assembly asssuming the problem must be with my car I measured the hub which was with in tolerance <0.02mm, marked the high point on the disk rotor, turned it 180 degrees only to find that the high point was still the high point i.e. it was the disk that was out of tolerance!

OK everybody makes mistakes right (although I'd argue that brake component manufacturers do not really have this luxury) so I contact JustJap who are very helpful and organise a courier pick up of the disk and it's return to K Sport.

K Sport call me and I give them a run down of the problem, they say they wil look at it and see what they can do...

A few days later the very same faulty disk rotor that I sent them is returned with; no paper work or any other repair information and the same run out problem!

I am out of pocket $2K, my car has been off the road for over a month and I am f**king pissed off!!!

Your goods are not "fit for purpose" so I suggest you take the kit back to JustJap and get your money back. They have to return your money if i understand the Trade Practices act, or whatever its called these days.

Seems odd to me that ksport got involved with you - IMO you should just deal the JJ. I would insist on that if i were you.

FWIW, I am a happy JJ and G4 brake customer.

[R377]

On 13/04/2011 at 9:22 PM, BoostdR said:

Interested in the 356mm

 

Nice vid of collingrove - thats some good times for mallalla