Ronnie's New Family Car - Cavalier GSI :)

[djivesp]

woah

[alistairolsen]

Always the problem spacing out lug mounted calipers, unless you sapce them a long way so you can use a chunk of bar milled on both sides you end up with nasty big spacers as you have discovered!

Personally Id be happier if instead of those spacers you were using a plate covering the area and welded to the main mount plate.

Also, how did you ensure the mounting face of the caliper was flat after you ground it down?

[spanishfly]

Personally Id be happier if instead of those spacers you were using a plate covering the area and welded to the main mount plate.

Also, how did you ensure the mounting face of the caliper was flat after you ground it down?

[rc]

Always the problem spacing out lug mounted calipers, unless you sapce them a long way so you can use a chunk of bar milled on both sides you end up with nasty big spacers as you have discovered!

Personally Id be happier if instead of those spacers you were using a plate covering the area and welded to the main mount plate.

Also, how did you ensure the mounting face of the caliper was flat after you ground it down?

yea its not the easiest way to do it with lug calipers compared to the top mounted type like the 4pots etc,

i was going to use a piece of 20mm steel instead of the two tubes, and still might, as they do seem to be the thinnest point hanging the bolts out, the reason i grinded the caliper down 10mm is so i can put the plate on the outside and still have full length of the standard bolt in the hub, didnt want to be ripping any threads out, still leaves 25mm of caliper so no problems there, and they where only spacing lugs so nothing structual in the caliper,

and ensuring the faces where flat? took ALONG time may only look like 5 mins work flicking through the pic's but its taken over 10 hours to get where i am so far, i took the majoritie off with a grinder, then hours of filing down and checking with a set of verniers to check the two sides where still square and then further with a set of calipers fine tuning it all flat, ensuring 25mm across the whole flats.

agreed it would of taken a fraction of the time in a machine shop and and getting them milled down in minutes, but unfortuatly i had to do it the hard and VERY long way

[alistairolsen]

Been there before mate doing similar things myself. Just wanted to check you'd considered it. If they werent flat it wouldnt affect your braking performance, the whole assembly is so flexible it will pull into alignment, but the constant flexing means it WILL eventually fail.

Yeah id use a steel plate instead of spacers personally and at least tack it onto the plate you have to remove the potential shear movement.

[rc]

Been there before mate doing similar things myself. Just wanted to check you'd considered it. If they werent flat it wouldnt affect your braking performance, the whole assembly is so flexible it will pull into alignment, but the constant flexing means it WILL eventually fail.

Yeah id use a steel plate instead of spacers personally and at least tack it onto the plate you have to remove the potential shear movement.

yea it may look like from the pics i've just attacked it with a grinder to about rightish, but there was many many hours filing and checking with calipers, never done do much exersise in years, i was ****ed lmao

yes they where the only bits i was only half hearted about the two small 10mm dia contract areas, think i will go the solid plate route, seems to remove any doubt then. hadnt thought about tacking them together, but defo makes sense!

[vxlgsi]

Admire your efforts but fu*ck that, looks proper dodgy to me and your doin that to the car you haul your son around in...!

[rc]

Admire your efforts but fu*ck that, looks proper dodgy to me and your doin that to the car you haul your son around in...!

what part looks dodgy to you? i will be replacing the two tubes with one big slab of 20mm steel for a bit more stability, so the bracket will then be one big L-piece

how do these differ to your 256mm to 300mm conversion brackets?

[vxlgsi]

oh i thought you were bolting them up like the pics

[Steve!]

The disc on the right, has more stopping power than the disc on the left....

[Jack]

Please tell us how Steve, the anticipation is killing me.

[Mark_F]

More pad contact area. ~1cm on the disc on the left will never be used.

Big discs look cool though.

[humbucker]

More pad contact area. ~1cm on the disc on the left will never be used.

doesnt that mean it has the SAME stopping power, just some wasted disc space on the bigger discs? (and if so doesn't this mean the whole exercise is a waste of time?)

[Jack]

More pad contact area. ~1cm on the disc on the left will never be used.

But surely they're the same pads? If they're the same pads and they both have 100% contact with the disc, how could they be any worse?

[Adam]

perhaps easier to warp the discs more on the left ones do to the heat not dispersing equally along the face?
*gets coat and goes into 100m sprint siloutte

[alistairolsen]

WTf are you all on about? They both have the same pad contact area, limited by the area of the pad itself.

Pad contact area doesnt even affect braking power, it affects fade!

braking power is controlled by line pressure, piston area, frictional coeficcient and rotor diameter.

[Mark_F]

Could be yep. Using the 288 calipers makes it a pretty pointless exercise in terms of increasing stopping power as the old setup will be more efficient.

The bigger discs will look so much better behind the alloys though.

[Adam]

HI

My name is RC and i wont be modding my cav gsi its a family saloon thats all i want it for!

lmao bullfooookenshnizzlesticks!

[Ian H]

HI

My name is RC and i wont be modding my cav gsi its a family saloon thats all i want it for!

lmao bullfooookenshnizzlesticks!

lmaolmaolmaolmaolmao

[Carneyste]

HI

My name is RC and i wont be modding my cav gsi its a family saloon thats all i want it for!

lmao bullfooookenshnizzlesticks!

IIRC the all started to get out of hand after a brake upgrade lmaolmao

Keep the updates coming

[Adam]

oh...much like his mini moto brake upgrade then lmao

[rc]

The disc on the right, has more stopping power than the disc on the left....

you are one stupid mother ****er lmao, some of the things you say on my threads, how you managed that engine conversion is beyond me unless you had a step by step instruction manual written in pics by someone else

the whole pad has disc contact on both the 288mm and the 321mm disc, the same, it is still in the same master cylinder, brake line, caliper piston so at best it cant be any worse with way

BUT..

as said at the end here

WTf are you all on about? They both have the same pad contact area, limited by the area of the pad itself.

Pad contact area doesnt even affect braking power, it affects fade!

braking power is controlled by line pressure, piston area, frictional coeficcient and rotor diameter.

the discs are greater diameter, think of it as if you were undoing your wheel bolts with a 6 inch spanner, how much force is needed to undo them compared to if you use a breaker bar, if you use the same amount of force on the breaker bar as you did on the 6 inch spanner you'd slip over and smash your self in the face it comes undone so easy. at the same time, giving your self a longer 'bar', if you put the same breaking pressure 144mm away from the centre of the disc as you do 160.5mm away from the centre you are going to have a greater mechanical advantage with the larger diameter

hello ???

[rc]

HI

My name is RC and i wont be modding my cav gsi its a family saloon thats all i want it for!

lmao bullfooookenshnizzlesticks!

IFFFFFFFFFFFFFFFFF you read the origional thread i said i wasnt going to do anything to the car EXCEPT the front brakes and interior,

i changed all the interior.. pimping leather,

and changed the brakes, to the vans 288s

however, these are two things i CAN change as in the origional post, so here i am changing the front brakes lmaolmao

[Ian H]

trying to get off on a technicality eh? lmaolmaolmao

Im not complaining though, I love reading your project threads

[Steve!]

Works the opposite in this case....

Lets leave it there!