[Fot] Kastner F cam

[Marcel Van Mulders]

Jerry, it means that both the inlet and outlet valves will open and close 4°
sooner in respect to the crankshaft position. To achieve that,the camshaft
is turned 4° clockwise. Advancing a cam is done to get more low and mid rpm
torque, without loosing little power at high rpm. Advancing and retarding a
cam is done by 4 to 6 degrees, no more than 8 degrees. High rpm torque can
get better by retarding the cam, but it is uncommon. Sometimes the
manufacturer will advise to install the cam with some advance, then you get
asymmetrical timing figures (also of course when you decide to advance any
cam).If you can't make a back to back test on a dynamometer, you will not
know if advancing a cam will make a difference.
Marcel 

-----Oorspronkelijk bericht-----
Van: Fot [mailto:fot-bounces at autox.team.net] Namens Jerry Van Vlack via Fot
Verzonden: vrijdag 23 december 2016 15:46
Aan: Duncan Charlton
CC: Duncan Charlton via Fot
Onderwerp: Re: [Fot] Kastner F cam

Friends, can someone explain installing a cam with xx advance, somewhere I
saw a reference to doing a cam installation with a 4 degree advance. Does
that mean that if the valve opens at xx degrees that it should be set to
open at xx minus 4 degrees and what purpose does that serve? Is this the
same as using .010 or some other checking clearance. Seems that these two
variables are related and one should use one or the other method but not
both.
Thanks, I'd like to learn more about this stuff.

JVV

---- Duncan Charlton via Fot <fot at autox.team.net> wrote: 
If I follow what you’re talking about, it should make no difference whether
you use 0.010” or 0.050” as long as one is consistent about it.  If the
intake opening and exhaust closing happen at the same number of degrees
before/after TDC the cam has been installed with 0° advance.

Duncan Charlton
Elgin, Texas USA



> On Dec 22, 2016, at 6:25 PM, Jack Wheeler via Fot <fot at autox.team.net>
wrote:
> 
> Hi Mike.  Be careful.  The specs on Steve's sheet are the same as the
specs I quoted from Kastner's Competition Manual in an earlier email.
According to Kas's Manual, those clearances are to be used at a .010
checking clearance.  I'm not sure why you couldn't use them, but you would
have to use the .010" checking clearance, not .050"  Good Luck.
> 
> Jack Wheeler
> 
> 
> From: Michael Haberthur via Fot <fot at autox.team.net>
> To: Steven Belfer <steve at artwithcars.com>
> Cc: triumph friends <fot at autox.team.net>
> Sent: Wednesday, December 21, 2016 5:35 PM
> Subject: Re: [Fot] Kastner F cam
> 
> That's great. I have one on the shelf but had no idea where to start on
timing.
> 
> On Dec 21, 2016 2:31 PM, "Steven Belfer via Fot" <fot at autox.team.net
<mailto:fot at autox.team.net>> wrote:
> I have a sheet for the F-cam that my dad made in 1968   Pix attached
> <image1.JPG><image2.JPG>
> ~Steve
> 
> 
> On Dec 21, 2016, at 10:47 AM, John Styduhar via Fot <fot at autox.team.net
<mailto:fot at autox.team.net>> wrote:
> 
>> How about Kas Kastner?
>> 
>> On Wed, Dec 21, 2016 at 9:06 AM, Dennis DeLap via Fot <fot at autox.team.net
<mailto:fot at autox.team.net>> wrote:
>> A M I C I
>> Has anyone ever figured out data for degreeing the F cam at .050 tappet
rise?
>>
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