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 Post subject: Re: cam help
PostPosted: Fri Jul 22, 2016 10:31 am 
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Joined: Thu Oct 14, 2010 11:23 am
Posts: 1802
Morning Cranky. Even with my glasses on i cannot read the markings on these! Late night was it? MikeV

Thank you Cranky. I can see clearly now......

MikeV


Last edited by 618F1 on Sat Jul 23, 2016 9:15 pm, edited 1 time in total.

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 Post subject: Re: cam help
PostPosted: Fri Jul 22, 2016 12:46 pm 
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Joined: Thu Oct 14, 2010 11:23 am
Posts: 1802
Some cams for the Pantah/F1 engine.

NCR7; found with, and without holes:
Attachment:
cams NCR 7.jpg
cams NCR 7.jpg [ 16.17 KiB | Viewed 1359 times ]

Attachment:
cam NCR7 a.jpg
cam NCR7 a.jpg [ 18.4 KiB | Viewed 1359 times ]


GCM; usually with holes:
Attachment:
cams F1 GCM 1.jpg
cams F1 GCM 1.jpg [ 25.54 KiB | Viewed 1359 times ]

Attachment:
cams F1 GCM c.jpg
cams F1 GCM c.jpg [ 58.97 KiB | Viewed 1359 times ]


Montjuich, and listed as original Pantah race cam according to Falloon, usually without holes:
Attachment:
cams Mont b.jpg
cams Mont b.jpg [ 20.01 KiB | Viewed 1359 times ]


Finally, ORSP also sells "F1" race cams. Perhaps I will add a photo later; now installed in a working set of heads. They quoted timing like the Montjuich, I think. Their timing and lift suggests something like all those above.
MikeV


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 Post subject: Re: cam help
PostPosted: Fri Jul 22, 2016 12:55 pm 
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Joined: Thu Oct 14, 2010 11:23 am
Posts: 1802
Some reverse-V head cams:

GCM for 750/900:
Attachment:
cams GCM 750SS 1.JPG
cams GCM 750SS 1.JPG [ 488.51 KiB | Viewed 1356 times ]

Attachment:
cams GCM 750SS 2.JPG
cams GCM 750SS 2.JPG [ 518.75 KiB | Viewed 1356 times ]


ST2 cams:
Attachment:
cams ST2 b.jpg
cams ST2 b.jpg [ 18.83 KiB | Viewed 1356 times ]


And, now on US ebay, a set listed for the 750/900 (note the numbers on the H cam---same as the Pantah race/Montjuich part:
Attachment:
cam h 900 montjuich.jpg
cam h 900 montjuich.jpg [ 159.33 KiB | Viewed 1356 times ]

Attachment:
cam v 900 montjuich.jpg
cam v 900 montjuich.jpg [ 152.14 KiB | Viewed 1356 times ]


Some 900SS (OHT & VHT, big and small letters) cams installed in Pantah heads:
Attachment:
IMG_0762.JPG
IMG_0762.JPG [ 3.4 MiB | Viewed 1353 times ]



MikeV


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 Post subject: Re: 900SS cams in Pantah heads
PostPosted: Fri Jul 22, 2016 1:35 pm 
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Joined: Thu Oct 14, 2010 11:23 am
Posts: 1802
900SS cams installed in Pantah heads with 41/35mm valves (Carlo Leoncini work). The valves are still the stock 4.5mm apart, and at closest lift they are about .055" apart---just fine. Yes, I know the valves are "shrouded" now. Stock valves are "bolt-ins" --- love those last two words; ask Paul Ritter, famed bevel racer, and see what he says about them.

But, if you use the race cams (NCR, GCM, Mont/Pantah P cams, ORSP, etc.) then they must be about 6.0mm apart or the valves will crash together at overlap. That is when the chamber really needs to be made much bigger to get anywhere near .050" or .060" without the dreaded shrouding. No where near bolt-ins except for F1B heads with stock 41/35 valves (with NCR 7s, for example). MikeV

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IMG_0760.JPG
IMG_0760.JPG [ 3.66 MiB | Viewed 1353 times ]


Last edited by 618F1 on Sat Oct 29, 2016 11:45 am, edited 1 time in total.

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 Post subject: Re: cam help
PostPosted: Sat Jul 23, 2016 8:59 am 
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Joined: Tue Oct 05, 2010 9:21 am
Posts: 274
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618F1 wrote:
Morning Cranky. Even with my glasses on i cannot read the markings on these! Late night was it? MikeV


Hay Mikey Clear? It is on this end. Must be you and that "West Coast" haze.


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DSCN0636[1].JPG
DSCN0636[1].JPG [ 1.74 MiB | Viewed 1334 times ]
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 Post subject: Re: cam help
PostPosted: Sat Jul 23, 2016 9:03 am 
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Joined: Tue Oct 05, 2010 9:21 am
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Another one for referance


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DSCN0637[1].JPG [ 1.69 MiB | Viewed 1334 times ]
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 Post subject: Re: cam help
PostPosted: Thu Oct 27, 2016 6:16 am 
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Joined: Wed Nov 03, 2010 1:29 pm
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Attachment:
2011 02 mars Rutter Harris  Ducati  F1 008.jpg
2011 02 mars Rutter Harris Ducati F1 008.jpg [ 1023.35 KiB | Viewed 1199 times ]

Primo, thanks for the replies .........have only just seen them .......must have been distracted with the Assen weekend .

Secundo , I've got 'P' cams in my F1 engine ( natch) and looking at Brad's chart can see that they have wicked overlap !


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