Jonathan Pounsett Posted January 26, 2023 Share Posted January 26, 2023 I want to upgrade my rear discs from solid to vented and wondered what others have done or would suggest. They are currently ATE 24.0111-0127.1 and I’m trying to find a standard “off the shelf” disc with a similar specification to the Manta 400 group B ones but at a reasonable cost? 🤔 I found these but can’t afford them 😂; https://viadanny.com/a-51385198/rear-axle/set-brake-discs-opel-ascona-and-manta-400-group-b-rear-5x120/#description 1 Quote Link to comment Share on other sites More sharing options...
Jessopia74 Posted January 26, 2023 Share Posted January 26, 2023 First question is why? But they will be pretty bespoke tbh, perhaps do away with the internal shoes would give more options, since that would open up opportunities for larger bmw ones. Looking at those on the site, I do wonder if they are re machined discs, perhaps with a Porsche fitment as some if those are deep bells. ‘Have you used the Brembo catalogue for dimension search ? https://www.bremboparts.com/europe/en 1 Quote Link to comment Share on other sites More sharing options...
Jonathan Pounsett Posted January 26, 2023 Author Share Posted January 26, 2023 2 minutes ago, Jessopia74 said: First question is why? But they will be pretty bespoke tbh, perhaps do away with the internal shoes would give more options, since that would open up opportunities for larger bmw ones. Looking at those on the site, I do wonder if they are re machined discs, perhaps with a Porsche fitment as some if those are deep bells. ‘Have you used the Brembo catalogue for dimension search ? https://www.bremboparts.com/europe/en I’ve used a few “search by dimensions” sites but not found anything. These are also on viadanny.com; https://viadanny.com/a-76315052/rear-axle/brake-disc-rear-ventilated-opel-diplomat-bitter-manta-400-ascona-400/#description Quote Link to comment Share on other sites More sharing options...
Jessopia74 Posted January 26, 2023 Share Posted January 26, 2023 Just now, Jonathan Pounsett said: I’ve used a few “search by dimensions” sites but not found anything. These are also on viadanny.com; https://viadanny.com/a-76315052/rear-axle/brake-disc-rear-ventilated-opel-diplomat-bitter-manta-400-ascona-400/#description Doubt it would be any cheaper to have something purchased and modded to work than those mate. 2 Quote Link to comment Share on other sites More sharing options...
H-400 Posted January 26, 2023 Share Posted January 26, 2023 Think the Danny ones will be the cheaper ones. To compare: https://www.altopelhilfe.de/product_info.php?info=p267_bremsscheibensatz-hinten-admiral-diplomat-2-8e---v8--bitter-cd.html 1 Quote Link to comment Share on other sites More sharing options...
GTEPETE Posted January 26, 2023 Share Posted January 26, 2023 Didn't know some 400s had vented rear discs...The issue is the disc has a very deep bell to cater for the handbrake shoes....have a look at BMW front or rear discs...I plan to fit Z4 front discs on the rear, but I am just using Commodore shafts in a Manta axle. My caliper has a cable handbrake mechanism...looks like you need to stick with 400 vented discs... 1 Quote Link to comment Share on other sites More sharing options...
Jonathan Pounsett Posted January 26, 2023 Author Share Posted January 26, 2023 Which ever route I take I will need to modify my calipers (widen them) so may bin them and opt for a modern calliper with a built in handbrake function. That’s my next search 😀 Thank God we have the internet - how did we do all this research in the old days? 1 Quote Link to comment Share on other sites More sharing options...
Jessopia74 Posted January 26, 2023 Share Posted January 26, 2023 1 hour ago, Jonathan Pounsett said: Which ever route I take I will need to modify my calipers (widen them) so may bin them and opt for a modern calliper with a built in handbrake function. That’s my next search 😀 Thank God we have the internet - how did we do all this research in the old days? Books mate and a notepad lol Quote Link to comment Share on other sites More sharing options...
Jonathan Pounsett Posted January 26, 2023 Author Share Posted January 26, 2023 2 hours ago, Jessopia74 said: Books mate and a notepad lol I think the lads and lasses in your local parts department or motor factors were more helpful and would help you find what you were looking for. These days if you don’t have a part number or a registration number they can’t help you much. 1 Quote Link to comment Share on other sites More sharing options...
Jessopia74 Posted January 27, 2023 Share Posted January 27, 2023 2 hours ago, Jonathan Pounsett said: I think the lads and lasses in your local parts department or motor factors were more helpful and would help you find what you were looking for. These days if you don’t have a part number or a registration number they can’t help you much. That is very true mate. The patience of some of those guys helping to go through various catalogues / cross reference parts . Difference is patience I guess. Things have changed (for us all ) so that we are now so used to having information far quicker. But that has also bred laziness to some extent, sadly 1 Quote Link to comment Share on other sites More sharing options...
GTEPETE Posted January 27, 2023 Share Posted January 27, 2023 We used to visit scrap yards for ideas..... Brembo, QH, Unipart catalogues will list all the disc dimensions... 1 Quote Link to comment Share on other sites More sharing options...
GTEPETE Posted January 28, 2023 Share Posted January 28, 2023 On 26/01/2023 at 18:53, Jonathan Pounsett said: Which ever route I take I will need to modify my calipers (widen them) so may bin them and opt for a modern calliper with a built in handbrake function. That’s my next search 😀 Thank God we have the internet - how did we do all this research in the old days? The caliper will be relatively easy to widen using an alloy spacer and longer bolts.... https://www.autodoc.co.uk/era-benelux/2453295 Another source for discs, maybe look at Ozzy Holdens.... 1 Quote Link to comment Share on other sites More sharing options...
green diamond Posted January 28, 2023 Share Posted January 28, 2023 Some Omega B had vented rears, will be the wrong PCD but those linked in the 1st post look like the origional PCD has been machined out 2 Quote Link to comment Share on other sites More sharing options...
GTEPETE Posted January 28, 2023 Share Posted January 28, 2023 Omega rear discs 2 Quote Link to comment Share on other sites More sharing options...
Jonathan Pounsett Posted January 28, 2023 Author Share Posted January 28, 2023 2 hours ago, green diamond said: Some Omega B had vented rears, will be the wrong PCD but those linked in the 1st post look like the origional PCD has been machined out 15 minutes ago, GTEPETE said: Omega rear discs They look like they’d work but as @Jessopia74 pointed out once you paid for the machining you’re heading towards viadanny’s price. I think my calipers may touch the wheels due to the shallower depth. These 67mm and mine are 83mm. In someways I’d like to buy his as it helps reimburse him for his design effort. Some further research has shown several BMW ones to be very close without any machining. I’ll keep looking and post what I find here. 1 Quote Link to comment Share on other sites More sharing options...
Jessopia74 Posted January 28, 2023 Share Posted January 28, 2023 3 hours ago, green diamond said: Some Omega B had vented rears, will be the wrong PCD but those linked in the 1st post look like the origional PCD has been machined out That was my thought too.(but was not sure on the discs OE fitment, I was thinking sone BMW) 👍 Quote Link to comment Share on other sites More sharing options...
Jonathan Pounsett Posted January 28, 2023 Author Share Posted January 28, 2023 There will definitely be a BMW that works. There are literally hundreds to sift through some models had 10 different rear disks! I may need to visit a brake man and see if they can search their database by critical data. 1 Quote Link to comment Share on other sites More sharing options...
Jessopia74 Posted January 28, 2023 Share Posted January 28, 2023 4 hours ago, Jonathan Pounsett said: There will definitely be a BMW that works. There are literally hundreds to sift through some models had 10 different rear disks! I may need to visit a brake man and see if they can search their database by critical data. Yeah, sometimes it’s difficult to find that one. And then you find out that they are nearly as rare to find as what you was originally trying to substitute 😬 1 Quote Link to comment Share on other sites More sharing options...
Moonmonkey Posted January 29, 2023 Share Posted January 29, 2023 (edited) There are some vented 400 discs on German eBay a bit cheaper at €276 (think they are actually based in Holland) https://www.ebay.de/itm/Bremsscheibe-bel-ftet-mit-Trommel-Hinterachse-Satz-Diplomat-B-Bitter-Manta-400/385374247276?hash=item59ba18596c:g:7msAAOSwlGRhTIzv&amdata=enc:AQAHAAAAoCDOHlw4RuHD1AJsWy9gVqSupM3L2ggoCkhAdyjhWRWmh/bxO45laXLhbd759Td8VYIMEZTZZ3GMxuk+rXtJ+qHxvFUuLMnjADV1EN1LttT3/EcSFjRIvhXG8Cl6csQ0mvs44ji/Y21srLN80QeOLp55wDJWeZ6v+Ic6cSJNZGcB/wYa9i6JYKLuYuO/BabW/gDBhL75DEoRUof2tOqBDQM=|tkp:Bk9SR7Cw4Ky_YQ&pageci=f3e1237c-f4a1-4487-b56c-004fe6d10419&redirect=mobile Edited January 29, 2023 by Moonmonkey 1 Quote Link to comment Share on other sites More sharing options...
GTEPETE Posted January 29, 2023 Share Posted January 29, 2023 I would like to see what calipers are used with the wider discs... Quote Link to comment Share on other sites More sharing options...
rutts Posted January 29, 2023 Share Posted January 29, 2023 Could email brakes international Rochdale they might cross reference discs for you. 1 1 Quote Link to comment Share on other sites More sharing options...
Moonmonkey Posted January 29, 2023 Share Posted January 29, 2023 (edited) 8 hours ago, GTEPETE said: I would like to see what calipers are used with the wider discs... I think the works 400s used Lockhead/AP CP2361's 4 pots. I think they were originally forest spec on the front of Group 4 Escorts. Not cheap these days Burton Power Products has them at £800 each Also i think you can get 2 piston AP racing calipers to fit Also noticed viadanny has the other type of vented 400 discs like the Ebay one, they are a bit cheaper at €130 each https://viadanny.com/a-76315052/rear-axle/brake-disc-rear-ventilated-opel-diplomat-bitter-manta-400-ascona-400/#description Edited January 29, 2023 by Moonmonkey Spelling Quote Link to comment Share on other sites More sharing options...
Jonathan Pounsett Posted January 29, 2023 Author Share Posted January 29, 2023 1 hour ago, rutts said: Could email brakes international Rochdale they might cross reference discs for you. I will try them tomorrow. Thanks @rutts. Quote Link to comment Share on other sites More sharing options...
GTEPETE Posted January 29, 2023 Share Posted January 29, 2023 Not sure if those Lockhead/AP calipers were used on Chevy V8 Bitters or Admiral's though.....So best bet is to modify the standard calipers using a spacer... 1 Quote Link to comment Share on other sites More sharing options...
Jonathan Pounsett Posted January 29, 2023 Author Share Posted January 29, 2023 2 hours ago, Moonmonkey said: I think the works 400s used Lockhead/AP CP2361's 4 pots. I think they were originally forest spec on the front of Group 4 Escorts. Not cheap these days Burton Power Products has them at £800 each Also i think you can get 2 piston AP racing calipers to fit Also noticed viadanny has the other type of vented 400 discs like the Ebay one, they are a bit cheaper at €130 each https://viadanny.com/a-76315052/rear-axle/brake-disc-rear-ventilated-opel-diplomat-bitter-manta-400-ascona-400/#description The discs were out of my price range so the calipers definitely are at £800 - for now I’ll just modify the Commodore ones. If I can’t find an alternative discs I will probably go for the viadanny cheaper option I considered above. Quote Link to comment Share on other sites More sharing options...
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