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science

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Posts posted by science

  1. Posted

    Looks like these are more suited to higher revving race engines, almost twice the price of standard.

     

    That's right Dave, VW didn't bother because there's not much point in winding up a (standard)VR6 too high. The V6 Audi lump of the period used them and I think the limiter is set at 7200rpm.

     

    If anyone is interested in a set I've found a UK supplier which would work out to >£120 delivered for a set of 12. Only catch is they only supply in batches of 8 tappets.

  2. Posted

    After trawling the American and German VR6 forums, it seems many people have had success with the lighter weight lifters from the 16v and g60 engine;

    VW 050109309H

    INA 420004310

    Weight 50g/54g

     

    As opposed to the original VR6;

    VW 034109309AD

    INA 420002210

    Weight 80g/86g

     

    Google search "vr6 leichten hydrostossel" for more info.

  4. Posted

    The VR6 head is flat, so skimming it will not change the volume of the combustion chamber.

    Like a book on top of a pint glass, the thickness of the book will not change the volume in the glass.

    Changing the thickness of gaskets /spacers or skimming the block will change the volume and therefore the compression ratio.

  5. Posted · Edited by science

    It seems some Cosworth YB engine owners have used VW's (034109309AD) tappets as a cheaper alternative.

    But they are inferior to the Cosworth engine labyrinth design tappet.

    http://www.ina.de/content.ina.de/en/branches/automotive/engine_systems/product_range/mot3200/mot3210/mot3211/mot3211.jsp

     

    Cosworth INA part no. 420004810 TSTHL type (hydraulic bucket tappet labyrinth design) 64,5 gramm?

    Volkswagen INA part no. 420002210 TSTH type (hydraulic bucket tappet) 81 gramm?

     

    INA Hydraulic tappet catalogue;

    http://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/automotiveaftermarket/catalogue/downloads_2/INA_valve_train_components_pc.pdf

     

    I'm not suggesting using these as the specification may be different, with potentially disastrous results.

    But the INA Cosworth tappets are now cheaper and easily available.

  7. Posted

    When you have a skim you normally put a thicker gasket in to keep the compression correct. There is usually a bit of the gasket showing that has one two or three holes punched in it. This tells you how thick the gasket is. More holes- thicker gasket- more has been skimmed off usually.

     

    On the Vr6, the combustion chamber is not in the head, so it won't change the compression ratio.

    I think the way to tell is to measure the head height but I don't have the original factory value, only the 139.5mm minimum.

  12. Posted

    I wonder why I bother sometime and just for clarification I am not in the best of moods but if I post up something I don't just make it up I check the facts first.

     

    If you have an up to date copy of ETKA with the appropriate updates it will show you that the RHD instrument cluster is a classic part, cross checking that on the VW classic parts website (google it, I can't be bothered to post a link frankly) shows that they have stock (as shown by the green box). So RHD later style VDO centre console gauge cluster, part number 536 919 527, is available from VW classic parts at a price of 200.98 Euros + shipping etc.

     

    So don't spend a fortune on ARZ shop with the very big windows and a man with a gun and a mask at the door to mug you on the way in as well as the way out.

     

    That is all.

     

    I think yor are a great mood!

    Can you lend me 201 teuro?

  23. Posted

    Bigger pistons aswell IIRC. If you can't improve braking power with leverage (disc diameter) because of wheel size limitations, good old extra friction comes a close second :D

     

    Kev, Would you say the 57mm piston (passat?) version of the calliper is worth doing over the 54mm golf 288 setup?

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