Topic: V8 Big Brake UPGRADE 220$ (Read 5784 times)

CateraMV6 · « **on:** 19 March 2010, 17:46:13 »

This is a complete bolt on kit from the GTO/Monaro, comes from the 5.7L V8 cars.

I have this kit installed on my own car, and I can tell you from experiance that the stopping distance was reduced by at least 5-10ft...
Also during panic stops the ABS has to kick in because the brakes are quite strong and lock the front wheels up if you really step on them...

Brakes installed on my car...

These brakes bolt right on the Omegas. Please compare the pictures of the brakes posted with the ones on your car, if they are the same then these will fit GUARANTEED.

The kit has Steel carrier, and Aluminium Caliper that features a dual piston design.
Calipers come from a car that had only 6000mi.
The OEM pad that comes with these is around 40% larger and covers a much larger area of the OEM rotors...

The kit comes complete with the following parts:

2 Carriers
2 Calipers
8 Slider Pins
4 Mounting bolts from caliper to carrier.
0 Mounting bolts Carrier to hub, reuse your old ones.
2 Bojno bolts
2 Hoses 2" longer to accomodate the extra length on the calipers.
4 anti rattle clips.
2 Bleeder screws.

Kit will include OEM brake pads but they are used 75% life left.
Price for the kit is 220$ USD.
Shipping will be around 45$ USD
Total 265$

For extra 50$ I will source a set of C5 Corvette brake pads which are 25% larger.

KIT PICTURES

pedroMV6 · « **Reply #1 on:** 20 March 2010, 00:01:30 »

$265 US works out to £176.484 today.

Bargain!

I don't need them but a damn good buy!!!

david_omega · « **Reply #2 on:** 20 March 2010, 01:05:35 »

Made in australia - lol.

Might put these on my UTE once the 3.0 goes in. and some drilled grooved big brakes.

CateraMV6 · « **Reply #3 on:** 20 March 2010, 05:51:35 »

This is the first of 4 kits I have ready for sale so no worries, I will have the rest ready within a few weeks.

Shipping sux I know but we will work it out.

I have collected a few pairs with low low miles on them I know they are hard to get over there.

If you guys want C5 pads let me know so I can preorder them.

Omegatoy · « **Reply #4 on:** 20 March 2010, 16:48:36 »

god thats tempting!!!!
however have you tried fitting them behind 15inch rims?
looks like they may need min 16?or poss 17 for clearance!!

CateraMV6 · « **Reply #5 on:** 20 March 2010, 16:58:08 »

Someone here tried them with 16" wheels and they fit just fine, a 15 will probably not fit, its a bit too small, but the interesting part is the caliper doesnt stick out much past the OEM one, just look at the 1st picture...

Vega · « **Reply #6 on:** 20 March 2010, 21:19:13 »

Hi,

Already have them bolt on.
I used the Holden Monaro brake pads.

Look here it is in Dutch but you will get an idea.

You can still use the 15" original steel rims

Peter

CateraMV6 · « **Reply #7 on:** 20 March 2010, 22:23:18 »

Seems to me the monaro brake pads are slightly larger then the C5 units by 1mm or so... in length and a bit more in width!

Quite interesting...

Vega · « **Reply #8 on:** 20 March 2010, 22:59:47 »

And you don't need the extra retension spring

MetalRush · « **Reply #9 on:** 20 March 2010, 23:19:37 »

I like my set better then Vega's

By the way: These are the real Opel Omega V8 brake calipers and disks

CateraMV6 · « **Reply #10 on:** 20 March 2010, 23:23:30 »

Yikes 1800 EURO for the V8 brakes no way, for that kind of cash you can get yourself a nice set of 6 or 8 piston BREMBO with custom brackets and new rotors with floating discs...

That V8 car is nice though!

MetalRush · « **Reply #11 on:** 20 March 2010, 23:26:19 »

The seller (OpelFrank) works, or has very close connections with the guys in Rüsselheim...
Take a look at his website (Sorry, in German

)
He had several Lotus Omega's and other exclusive cars... I envy the b*sterd

Omega6pot · « **Reply #12 on:** 21 March 2010, 17:17:31 »

Hi, I take it the price for postage is to the uk? If so I am very interested, how's big exactly are these brakes? Think omega v6s are 296mm standard, cheers Al

CateraMV6 · « **Reply #13 on:** 21 March 2010, 18:01:50 »

Quote

Hi, I take it the price for postage is to the uk? If so I am very interested, how's big exactly are these brakes? Think omega v6s are 296mm standard, cheers Al

Yep these fit perfect on the 296mm rotors, if your car has smaller rotors then they wont fit, you will have to upgrade to the bigger rotors. The hubs should be the same.
I will set up another package for you and I will let you know when its ready for shipping.

Omega6pot · « **Reply #14 on:** 21 March 2010, 19:09:30 »

Give me a pm when u get one gathered up mate, will uk monaro pads fit ok just for future replacement?

CateraMV6 · « **Reply #15 on:** 21 March 2010, 19:26:55 »

Yes they will, Monaro is same as GTO... but the C5 is has a bigger pad!

Vega · « **Reply #16 on:** 21 March 2010, 19:46:57 »

Quote

Yes they will, Monaro is same as GTO... but the C5 is has a bigger pad!

Not quite right, the Corvette C5 and the Holden Monaro have the same size, the only difference is that the Holden Monaro pads comes with retension spring attach.

Holden Monaro brake pads DP31505C

Peter

MetalRush · « **Reply #17 on:** 22 March 2010, 09:11:20 »

And if Omega6pot has the standard disks mounted, he can install the calipers without any problem.
Vega and myself did exactly the same

Omega6pot · « **Reply #18 on:** 22 March 2010, 09:13:50 »

My discs are away getting drilled at the moment so i hope to get this kit and get them lookin super tasty! very tempted with the bigger pads hmmmmmm

2woody · « **Reply #19 on:** 22 March 2010, 09:59:19 »

just a word of warning...

If you're contemplating upgrading the fronts, then you MUST, MUST also pay some attention to the rear as well. The main reason that the ABS is now coming on is that it's trying to lock the fronts much earlier, and at lower speeds - hence ABS action - hence actually increased stopping distances, not shorter.

There are many things to take into account when designing a braking system, such as the piston size, effective radius, brake factor, pad coefficient of friction, laden weight, percentage of that laden weight on the front wheels, unladen weight, weight transfer, centre of gravity height, front/rear pressure bias, ABS onset threshold, trailer towing, tyre size, ambient temperature - and so on. Even a simple change to one end of the vehicle affects the other end's braking.

Ask yourself this question..... "if I was involved in an accident and ended up in court, what kind of answer would I have if the judge asked "how do you know you haven't made the car less safe?"

and yes, I do design this sort of stuff for a living.

2woody · « **Reply #20 on:** 22 March 2010, 10:11:45 »

thought I'd better keep the rant to a separate post.

the Holden / GTO front brake is better than the Omega B one, but not as good as it could be - mainly because it's no bigger. The Omega brake set-up is really pants on a number of fronts. The main advantage of the Holden is that it has a different type of caliper slider, which doesn't wear out as rapidly as the Lucas one.

There is also an advantage from having a bigger pad area, but only really for road-racing or the like.

I have a set of these on the Holden, which are good, but in no way up to the performance of the vehicle.

for the track car, I'm using 350mm discs, developed around Audi calipers and of course rears to match ( actually 330mm BMW discs and Lotus Carlton calipers ). This has been quite difficult to develop, as the track car has very little rear-end weight.

the biggest headache is usually the different weight bias - the Holden, for instance weighs as little as 660kg at the rear, compared to over 1000kg laden. Getting the brakes to work properly under these widely different circumstances is very difficult. At least with the track car, the rear never changes ( outside 70kg or so for fuel )

Omega6pot · « **Reply #21 on:** 22 March 2010, 10:18:23 »

Im fitting the later v6 vented rears discs to mine at the same time, although no bigger im hoping for some sort of gain. I find omega brakes are very easily warped, is there anyway of helping to reduce this?

doog · « **Reply #22 on:** 22 March 2010, 10:24:24 »

ye

buy Gm brake components
or buy cheap motor factor brakes and not stand on the middle pedal hard

Doug

2woody · « **Reply #23 on:** 22 March 2010, 10:32:30 »

the warpage is caused by the caliper sliders wearing out. A small amount of wear causes vibration which quickly becomes warped discs.

OEM discs are of better quality and so resist warpage better. Mind you, OEM is actually ATE-brand - available from Euro Car Parts and not that expensive. GM discs these days are no better quality than cheap after-market ones.

regarding the later Omega rear discs & calipers, these should dissipate heat better as they're vented, but be aware that the piston size is bigger, which will reduce the rear brake effort. ( 42mm from 40mm )

anyone know the Holden / GTO front piston size ? (so I can work some stuff out)

Omega6pot · « **Reply #24 on:** 22 March 2010, 13:36:24 »

Hi my discs are off a police vehicle which had the more expensive pads fitted unlike vauxhalls trade club rubbish, are there more expensive discs?

MetalRush · « **Reply #25 on:** 22 March 2010, 15:00:20 »

Quote

anyone know the Holden / GTO front piston size ? (so I can work some stuff out)

Vega still has a set around... I'll ask him to measure it and post it here. I am curious about your findings.
(btw: I too have the 3.2 vented disks and calipers mounted at the back).
Using EBD red-stuff brake pads on all 4 disks.
I am driving mainly highway (~150km/day).

2woody · « **Reply #26 on:** 22 March 2010, 15:35:04 »

if all else stays the same, then going to 3.2 rear calipers will result in brake lock-up approximately 3% earlier than with the original piston size. The effect will be that the ABS will engage at lower speeds, increasing the braking distance. You will have full control over the vehicle during this time.

this is logical, as you've made the rear of the vehicle more efficient through greater force on the brake pads.

I've been writing a spreadsheet to cover this area. although not completely accurate, it's as good as I can make it and it also gives the required output for the brake Directive

Omega6pot · « **Reply #27 on:** 22 March 2010, 16:08:28 »

hmmm dont know what to do now, will probably fit the 3.2 rears becuse my rear setup is knackered now and the police donor car i have has recently replaced parts. I wonder if the abs can be adjusted

2woody · « **Reply #28 on:** 22 March 2010, 16:17:13 »

Quote

I wonder if the abs can be adjusted

yes, by Bosch

CateraMV6 · « **Reply #29 on:** 22 March 2010, 17:47:38 »

Alright its not as bad as you guys think...

I have only gotten ABS to kick in because I was full on the brakes and there was probably crap on the road surface that caused it in first place...

ABS kicking in does not increase your stopping distances.
A locked wheel thats sliding on the surface has less coefficient of friction then one that is rolling on it...

Only time a non ABS vehicle stops faster then ABS one is on a gravel surface where some of the gravel piles up in front of the wheel and acts as a brake.

My experience with these brakes is this...

Brakes are designed to convert kinetic energy into heat via friction between the brakes and the rotor.

So any of the pad you choose will be significantly larger compared to stock.
Clamping forces from the larger twin caliper wtih 44mm pistons will provide the necessary force to squeeze the larger pads onto the rotors.

As a result you have more heat dissipation due to the larger pad/caliper combo and more effective braking.

The entire system is also much lighte which shaves overal vehicle wheit and that helps in many other ways.

I used to heat up my stock brakes to the point where they would fade and refuse to stop... and that was in normal traffic conditions with lots of stop and go...
With the new brakes that hasn't happened yet.
I also took a cross country trip going over many mountains sometimes climbing 10,000ft and then dropping down to 2000 on the other side, riding the brakes etc, and never even one time did they fade on me...

Not sure rear upgrades are necessary, if you do the fronts, the 40mm rears vs the 42mm will likely not provide significant difference 85% of the braking is done on the front...

I think the combo with Dual piston front calipers and 42mm rears is a nice one since it features full vented brakes all around.

I should mention that braking improvements with the larger set up are significant and quite enough to stop the work horse under the hood... now for a V8 car these will never be enough.

2woody · « **Reply #30 on:** 23 March 2010, 08:53:02 »

Quote

ABS kicking in does not increase your stopping distances.
A locked wheel thats sliding on the surface has less coefficient of friction then one that is rolling on it...

Only time a non ABS vehicle stops faster then ABS one is on a gravel surface where some of the gravel piles up in front of the wheel and acts as a brake.

let's just expand a bit on what I said.

on a standard car, with standard brakes on a dry road, you will reach (for the sake of argument) 1.0g deceleration, at which point one end will lock up because you've run out of grip. That's when the ABS kicks in.

so the best braking you can achieve under these circumstances will be 1.0g

on a car with significantly more front-end braking, but no more rear end braking, the front will lock up earlier at, say 0.9g simply because you're applying more force at the front. ABS will kick in therefore at, say, 0.9g

so in this case, the best braking you'll achieve will be 0.9g

any car actually using its ABS will have increased stopping distances.

2woody · « **Reply #31 on:** 23 March 2010, 09:06:28 »

Quote

Brakes are designed to convert kinetic energy into heat via friction between the brakes and the rotor.

So any of the pad you choose will be significantly larger compared to stock.
Clamping forces from the larger twin caliper wtih 44mm pistons will provide the necessary force to squeeze the larger pads onto the rotors.

As a result you have more heat dissipation due to the larger pad/caliper combo and more effective braking.

the actual size of the pad doesn't affect the braking force per se, it does, however, make the pad much more stable and more resistant to fade. In addition, the pad lasts much longer.

the key elements affecting the force are connected with friction and torque. Torque depends on a lever - so the further the piston is away from the centre of the disc, the higher the braking force you can generate - this is why bigger brake discs are better (as are bigger wheels for that matter). Friction, meanwhile is connected to the clamping force.

certain formula racing series here in Europe used the Omega / Catera rear brake caliper on the front for many years and they have tiny pads.

Don't get me wrong, I'm not saying that this mod is bad, far from it - seeking to improve braking performance is a great thing to do. I'm really just highlighting that there's more to increasing braking performance than a bigger caliper at one end of the car

I'm just off to find out why my brake calculator can't cope with calipers having two pistons both on the same side :-? and then I'll maybe have some predicted deceleration figures to post.

david_omega · « **Reply #32 on:** 08 April 2010, 08:46:20 »

considering a set of these for the UTE project car im building.

TECHNOPUG · « **Reply #33 on:** 20 May 2010, 12:47:21 »

Quote

Hi,

Already have them bolt on.
I used the Holden Monaro brake pads.

Look here it is in Dutch but you will get an idea.

You can still use the 15" original steel rims

Peter

Are the Goodridge hoses off the shelf or custom jobs?

Vega · « **Reply #34 on:** 20 May 2010, 18:03:36 »

Quote

Are the Goodridge hoses off the shelf or custom jobs?

The are custom made.

Peter

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Author Topic: V8 Big Brake UPGRADE 220$ (Read 5784 times)

david_omega

david_omega