Post #1
Piper BP285H cams - Taken out of cylinder head that I bought.
Comparison between Piper and standard Pug inlet profiles:
£300 + delivery
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Cherry Red Rallye Project threadWhiteBMW M140i
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displaying posts 1 to 9 of 9
| Author | Subject: Sold - Piper BP285H cams |
 Denis
Regular  Location: Cambridge Registered: 07 Sep 2004 Posts: 491 Status: Offline |
Comparison between Piper and standard Pug inlet profiles: £300 + delivery WhiteBMW M140i |
 Posted 30th May 2014 at 21:48
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JWP EFi
Turbo Legend!  Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #2
would these work with pocketed o/e cast pistons and o/e valve gear? |
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Posted 12th Jan 2014 at 22:03
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Denis
Regular Location: Cambridge Registered: 07 Sep 2004 Posts: 491 Status: Offline |
Post #3
T99PUG wrote: would these work with pocketed o/e cast pistons and o/e valve gear? As far as I know, standard cams have lift of 0.8mm at TDC. Piper specifies timing of 1.83mm of lift at TDC. So with making piston pockets 1mm deeper, they should work on standard pistons. These cams are for use with hydraulic lifters (H - in the in the name, not be confused with just 285 - which require solid lifters). ________________________________________ Cherry Red Rallye Project threadWhiteBMW M140i |
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Posted 12th Jan 2014 at 22:32
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #4
Pm on it's way mate |
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Posted 12th Jan 2014 at 22:35
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JWP EFi
Turbo Legend! Location: edinburgh Registered: 07 Mar 2010 Posts: 2,163 Status: Offline |
Post #5
other than requiring solids what exactly is/are the diffrences between 285H and just 285? |
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Posted 12th Jan 2014 at 22:46
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Denis
Regular Location: Cambridge Registered: 07 Sep 2004 Posts: 491 Status: Offline |
Post #6
T99PUG wrote: other than requiring solids what exactly is/are the diffrences between 285H and just 285? Completely different profiles: link ________________________________________ Cherry Red Rallye Project threadWhiteBMW M140i |
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Posted 13th Jan 2014 at 00:15
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hepkem
Junior User  Location: ISTANBUL Registered: 11 Dec 2008 Posts: 52 Status: Offline |
Post #7
I checked your project thread and you use PT81. Piper BP285H are similar to PT81 so I guess I can get similar performance compared to your setup ?Do you use standard pistons in your setup or aftermarket forged items with PT81 ? It's written that standard pistons have to skimmed 1mm. Which aftermarket pistons will be compatible with BP285H ? ________________________________________ 1999 Xsara VTS ITB |
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Posted 21st Jan 2014 at 18:48
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Denis
Regular Location: Cambridge Registered: 07 Sep 2004 Posts: 491 Status: Offline |
Post #8
Yes, BP285H are very similar to PT81. As I already have PT81s - I don’t need these.For pistons, the easiest thing is to modify standard pistons by deepening valve cut-outs. As far as I know, 1mm is the maximum that can be done safely and provides enough space to time up these cams. For aftermarket pistons, off the shelf - Wossner; custom: Iasa, JE, Wiseco. ________________________________________ Cherry Red Rallye Project threadWhiteBMW M140i |
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Posted 21st Jan 2014 at 22:18
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Denis
Regular Location: Cambridge Registered: 07 Sep 2004 Posts: 491 Status: Offline |
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Posted 17th Feb 2014 at 21:50
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