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[Lesopc]

Me again guys, just wondering what size brake discs i would need to stop a Miggy with a V8  (LS series) lump. I'm guessing something from a Monaro but are there any other options i could consider?

What modifications would i need to perform to get the new discs on the Miggy as i don't really want to go cutting and chopping anything if possible?

My ideas so far are:-
Discs (drilled, grooved or both???) of the same size as a Monaro
Pads to match
Braided hoses to replace rubber ones

Any other ideas might be useful.

[TestOmega]

Which brakes, front or rear?

Cheers

[Lesopc]

Which brakes, front or rear?

Cheers

Sorry, i thought that was self explanatory. It will require new anchors for both front and rear as i expect a massive BHP difference which is no good unless there is something big enough to stop it.

[TestOmega]

Using standard discs but with upgraded caliper and pads which attach to existing carriage with the two standard Catera/Omega caliper mounting bolts.

People in North America have done the following with stock 16" and 17" front wheels with Cadillac Catera (sister of Omega),



There is also an excellent thread below that may be helpful,

http://www.cadillacforums.com/forums/cadillac-catera-cimarron-forum/110285-gto-brake-swap-log-4.html

The above being GTo (V8) based adaptation seems suitable.  I believe the Monaro and GTO have much in common so you are already more knowledgeable than me.

People on the following forum also have resale kits at times for very cheap but get one with the GTO brake lines included,

http://www.ls1gto.com/forums/

Cheers and just in case it helps.

[Phil]

Theres always the option of the 330mm discs and 4 pot AP calipers from the ST200 Vectra, more likely than not the carriers will fit the Omega as this was the set up on the still born V8 factory Omega iirc

Or you could just go for Vectra VXR brakes, upgraded ones are 362mm 2 piece 6 pot AP items!!

Courtenay also do a 345mm set up for the Vectra C/ Signum that could be adapted or just go for standard 3.2 V6 Signum/ Vectra C 314mm set up

[whippit]

Lotus Carlton setup would bolt straight on

[DodgeyDave]

Depends on you budget, carbon ceramics would be the best, but could be very expensive and may not be a staright forward fit.

[Phil]

Lotus Carlton setup would bolt straight on

Which is the same 330mm 4pot front set up as found on the ST200, as suggested above 

[feeutfo]

Do we need to consider that a bigger diameter disc will mean the calliper will need to be mounted further away from the centre of the wheel.? With an adapter to hub assembly perhaps? Or do the previously mentioned set ups take account for this? And still fit inside the wheel?

[Phil]

330mm discs went under 17s on the ST, but if you are going V8 than surely the wheels would be either 18 or 19's?

362mm on the VXR vectra needs 19's

Replacement carriers are generally sold as part of the upgrade kit fairly sure if you are modifying the engine bay to fit a V8 adjusting a couple of caliper carriers will be childs play!

Guess it all depends if you want more area and more pistons or same area and more pistons?

Another thing that will need checking is bore size on the replacement discs as i would assume FWD front hubs have a different bore??

[matty]

i fitted fiat coupe brembos to my old vectra

[Kevin Wood]

Adding pistons to the caliper doesn't help the brakes dissipate heat, which is a function of the size of the disk.

A larger pad area might help the pad take a little more abuse before throwing in the towel but a larger disk would be a better upgrade.

.. and then you have to consider the brake balance. Change the piston area or disk diameter and this will shift.

That said, how much more weight are you going to be stopping, and from how much faster?

Kevin

[Lesopc]

Adding pistons to the caliper doesn't help the brakes dissipate heat, which is a function of the size of the disk.

A larger pad area might help the pad take a little more abuse before throwing in the towel but a larger disk would be a better upgrade.

.. and then you have to consider the brake balance. Change the piston area or disk diameter and this will shift.

That said, how much more weight are you going to be stopping, and from how much faster?

Kevin

Well i reckon that a V8 LS lump will take the car to a max of around 170mph (not that this will be seen much if ever) and the engine itself will account for most of any weight difference...a fair few kg maybe???

[Lesopc]

330mm discs went under 17s on the ST, but if you are going V8 than surely the wheels would be either 18 or 19's?

362mm on the VXR vectra needs 19's

Replacement carriers are generally sold as part of the upgrade kit fairly sure if you are modifying the engine bay to fit a V8 adjusting a couple of caliper carriers will be childs play!

Guess it all depends if you want more area and more pistons or same area and more pistons?

Another thing that will need checking is bore size on the replacement discs as i would assume FWD front hubs have a different bore??

I am looking to go to 18" Ronals so anything that will go inside those is good. I think that for purpose the discs need to go bigger with more pistons in the caliper too?

[TestOmega]

330mm discs went under 17s on the ST, but if you are going V8 than surely the wheels would be either 18 or 19's?

362mm on the VXR vectra needs 19's

Replacement carriers are generally sold as part of the upgrade kit fairly sure if you are modifying the engine bay to fit a V8 adjusting a couple of caliper carriers will be childs play!

Guess it all depends if you want more area and more pistons or same area and more pistons?

Another thing that will need checking is bore size on the replacement discs as i would assume FWD front hubs have a different bore??

I am looking to go to 18" Ronals so anything that will go inside those is good. I think that for purpose the discs need to go bigger with more pistons in the caliper too?

Couldn't the wheel size change mess up your speedo and odometer!

http://www.miata.net/garage/tirecalcold.html

Just thinking :-? [smiley=engel017.gif] [smiley=engel017.gif] [smiley=engel017.gif] [smiley=engel017.gif] [smiley=engel017.gif]