KayTee Posted April 10, 2003 Share Posted April 10, 2003 Hello, everyone ! I still have troubles with the belt arrangement driving the waterpump and alternator on my BDx. the engine is to be put into a short-cockpit chassis with all the later braces and tubes. I do have the old "V"-shaped setup, which I am informed will go kaputt when one exceeds 7000rpm. Therefore I bought the "poly-vee" setup Burton#s offer, knowing that the belt will be too wide. I read on Blatchat that some people know that and how the poly-vee pulleys have to be modified. How ? How many rows of 'vees' do these folks use on their engines ? My belt has six 'vees', but I suppose they#re also avialable with three or four ? Does anyone have a picture or a drawing of said pulleys, showing me how to have the pulleys modified, and how wide a belt is being used ? See, I'd like to do these things before putting the engine in and having to do that routine 4-5 times before the alt.-drive finally works and fits ... THANKS A LOAD in advance !! Karsten Link to comment Share on other sites More sharing options...
edmandsd Posted April 10, 2003 Share Posted April 10, 2003 I use KAM developments direct replacement alloy pulley set with more modern belt design on my alloy blocked BD. Home of BDR700 Link to comment Share on other sites More sharing options...
Bilbo Posted April 10, 2003 Share Posted April 10, 2003 Hi Karsten and edmandsd Well I am still using the old V shape 8300 max reves. Seems fine err so far. In fact the alternator belt so close to the frame, about 3 mm, I doupt I could fit anything wider. Its a 1988 car so may be the later ones have more room 🤔 However, is the true BDX different edmandsd in set up edmands *confused* Edited by - bilbo on 10 Apr 2003 20:38:45 Link to comment Share on other sites More sharing options...
Trevor Phillips Posted April 10, 2003 Share Posted April 10, 2003 Just been fitting up my BDA today with a Brise Race alternator with 63mm pulley, 80mm elsewhere. Needed a 737mm Poly Vee belt - could only get 5 ridge whilst the pulleys are 6. Redline supplied the belt, John Wilcox the flexible alternator arm, Brise the pulleys. Racing pics and items for sale here Link to comment Share on other sites More sharing options...
KayTee Posted April 11, 2003 Author Share Posted April 11, 2003 Thanks Ed, Bill, Trevor ! Seems I'm buggered no matter what. The Vee-belt assembly needs about 6mm of spacing for the waterpump pulley not to touch the cam belt. Lovely. Doesn't actually run all that true, either. So I went with the Burton's set-up. Knowing I'd probably have to have the pulleys turned-down and a new belt sourced. Trevor: have you trial-fitted that assembly to the chassis, yet ? So, how much space *is* there, say between the front face of the engine block and the diagonal tube running downwards ?? Thanks ! - Karsten Link to comment Share on other sites More sharing options...
Trevor Phillips Posted April 11, 2003 Share Posted April 11, 2003 Karsten, The pulleys sit in front of the cam belt pulley with good clearance. Everything lines up fine other than there being a small amount of tension on the adjuster arm where it rests against the oil drain hose from the head to block. We had to make up a small extension bracket for the alternator top mounting as it was in the wrong place. Racing pics and items for sale here Link to comment Share on other sites More sharing options...
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