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Messages - de oude gek

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1
British Bikes / Re: J.A.P. vtwin engine timing
« on: October 18, 2010, 02:50:02 PM »

Julie, will look into it.
John, thanks for link, but part of the deal was to keep as much original parts on the motor as we could.

It keeps amazing me that parts like that are being remade very impressive.

Frank

2
British Bikes / Re: J.A.P. vtwin engine timing
« on: October 04, 2010, 04:29:53 PM »
Leon, the morgan has a coil ignition, the advance/retard mechanism is spring loaded toward advance, pulling a lever sets the retard.
From full advance to full retard is 20 crankshaft degrees.
Not knowing what to expect re the timing marks on the camshafts I set the cams on the markings and timed the 2 cilinders with a degree disk. As both open and close symmetrically I think cam timing is ok.(Valve lash was set to 0 and valve assumed to open at 0,5 mm. lift to compensate for ramping problems,cams are not really new.)
The owner is putting the rest of the car together, I'll let you know how it goes.

Frank

3
British Bikes / Re: J.A.P. vtwin engine timing
« on: October 04, 2010, 11:55:05 AM »
Hey Leon,
It sure is fun learning something new(every day :))
On this engine the timing cover needed repairs on the hand cranking snout after a crash.
On removing the cover the cams fell out.
The cams had minimal painted (maybe) timing marks and of course the
ignition cam had none at all.
Thoughts were that starting should be with the ignition fully retarded and not before TDC.
As total advance/retard is about 20 degrees total advance was set at 20.
We'll see how she runs as is,keeping in mind that advance could/should be more.

Frank
je leert hier elke dag wat

4
British Bikes / Re: J.A.P. vtwin engine timing
« on: October 03, 2010, 07:16:27 PM »

Leon, thanks for the information.
I googled for that table, but got nowhere.
The engine I was working on was a LTOWZ (ohv watercooled) out of a Morgan.So thet would need even more  :o
Is that table part of a book?
Would like a copy.
Thanks
Frank

5
British Bikes / Re: J.A.P. vtwin engine timing
« on: September 29, 2010, 10:47:57 PM »

Thanks for replys,
Leon, 38 degrees for ignition is with ignition fully advanced? seems a lot(am used to postwar engines :)).

Je leert hier elke dag wat
Frank

6
British Bikes / J.A.P. vtwin engine timing
« on: September 12, 2010, 02:27:32 PM »
Hi
I'm looking for camshaft and ignition timing information for a J.A.P.60degree Vtwin engine of '33-'34 vintage.
Thanks
Frank

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