sr2 Posted June 27, 2016 Share Posted June 27, 2016 Correct me if I'm wrong (haven't been under the bonnet of one for a long time) but doesn't the B1500 have a tandem master cylinder? If it does a VH44 (or any single hydrovac)wouldn't be suitable for boosting the original drums. Have to say I agree with Cletus on this one. Make sure all the hydraulics are in good condition, reline the shoes with medium Padgid compound (or similar) and make sure someone who knows their stuff machines the drums and radiuses the shoes to fit the individual drums. You might be suprised with the result. Quote Link to comment Share on other sites More sharing options...
maxted Posted June 27, 2016 Author Share Posted June 27, 2016 b1500/1600 1969-77 have single circuit master with drums all-round, so far I'm thinking, option 1: get shoes re-lined, and try brake test/ maybe add booster depending on feel option 2: try find next generation b1600 solid discs and boost front circuit only. note: in no way do I want to cheat the certification process i want it to be safe and legal in every way sr2 you are correct it wouldn't be suitable if it was tandem, but i have heard its possible to use two vh44 or the likes to boost both circuit and maybe add proportion valve for rear 1 Quote Link to comment Share on other sites More sharing options...
yetchh Posted June 27, 2016 Share Posted June 27, 2016 go for the next gen discs.. I had a landcruiser in oz that was four wheel drums and I was constantly adjusting them, pain in the ass.. so I upgraded them to 60 series discs/hubs and never looked back, plus don't forget that your b6 will be reving to 6500 odd rpm and get you to 100 much faster than your old na/vc 1 Quote Link to comment Share on other sites More sharing options...
maxted Posted June 27, 2016 Author Share Posted June 27, 2016 hmmmm maybe i will try sell later brake set-up and try find 2nd gen solids, according to lvta hobby car manual even if i retained drums i would need to run a dual circuit master anyway, which is far safer so makes sense. the joys of the snow ball effect from thinking hell yea twin cam efi 2 Quote Link to comment Share on other sites More sharing options...
sr2 Posted June 27, 2016 Share Posted June 27, 2016 b1500/1600 1969-77 have single circuit master with drums all-round, so far I'm thinking, option 1: get shoes re-lined, and try brake test/ maybe add booster depending on feel option 2: try find next generation b1600 solid discs and boost front circuit only. note: in no way do I want to cheat the certification process i want it to be safe and legal in every way sr2 you are correct it wouldn't be suitable if it was tandem, but i have heard its possible to use two vh44 or the likes to boost both circuit and maybe add proportion valve for rear Option 1: sounds like the path of least resistance and it just may get you through; a booster would allow you to run far harder linings than standard. Option 2: if parts are available and the conversion is straightforward it would defiantly give you the improvement you’re after. Even older solid rotors have a huge advantage over drums for heat dissipation. If the B1500 and B1600 rear cylinders are the same all you would need to do is use the B1600 master cylinder to get close with brake bias. You’re correct in that you can use 2 Hydrovacs on a split system (BMW did it years back but in my post I said "single"), you just can’t use one on a split system without radically changing the bias. You can also use two dissimilar hydrovacs on a single/or split system as a way of increasing front pressure for a disc conversion (eg a 5/8" Vh44 on the front and a 7/8" Vh44D on the rear). I did quite a number of such conversions in the eighty's, they were pretty trick for the times but to be honest they took up a hell of a lot of under bonnet space, were a bloody nightmare to plumb in and bleed and gave you a very average pedal! Avoid using a ‘proportioning valve’ if you can, most are really only pressure limiting valves and are no up to radically changing brake bias (e.g. going from drum/drum to drum/disc). 1 Quote Link to comment Share on other sites More sharing options...
yetchh Posted June 28, 2016 Share Posted June 28, 2016 Surely they would interchange.. Mazda seems pretty good like that.. Quote Link to comment Share on other sites More sharing options...
maxted Posted June 29, 2016 Author Share Posted June 29, 2016 yeah its probably going to be the best way forward i just hate the re-work haha the front drums already have new cyls shoes bearings hoses and all painted ect dam it Quote Link to comment Share on other sites More sharing options...
maxted Posted June 29, 2016 Author Share Posted June 29, 2016 haha yeah i didn't really think about the brakes thoroughly when i decided to ditch the dirty ole carb NA for the B6ze otherwise it all would of been fine, hopefully someone else wants some re-kitted brakes for a stock b1600 lol Quote Link to comment Share on other sites More sharing options...
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