... the trip to the beer store for 'payment' to the machinist!
-----Original Message-----
From: Aaron Johnson [SMTP:sugar@holly.ColoState.EDU]
Sent: February 11, 1999 2:00 PM
To: Erik Bjorkner
Cc: 'triumphs@autox.team.net'
Subject: Re: CAM DEGREEED
what took 3 hours for degreeing?
On Thu, 11 Feb 1999, Erik Bjorkner wrote:
>
> Thanks to all those who sent info on degreeing my cam for my SPIT
autocrosser!!
>
> I was having a problem with power above a certain RPM.. thought it
was the Stromberg and crappy exhaust on it.
>
> The cam was advanced about 10 degrees. I was going to advance it
so the power was not above 6000 RPM's (cam card states good for 6300) but I
decided to install it straight up or as close to that. It is now 1 degree
retarded.. close as I could get it.
>
> I experimented with the degree wheel much and it turns out that
one tooth is equal to 18 degrees. Therefore, one movement of the cam gear
is about 4 1/2 degrees. I had some positions which I doubled checked and I
came up with different numbers.. now the queer thing is that I got these
different numbers very constantly.. But he one it is set to now was always
on the ball.
>
> One important item was my cam does not have the same slope before
and after the lift (asymmetrical) and it was very difficult to get the cam
movements to less than a thousandth but when I did the results were very
good (less than 1/4 degree).
>
> I would recommend all degree their cams when rebuilding the
engine.. took about 3 hours but it is worth it!!!!! TOOK A TEST DRIVE WITH
A OPEN HEADER>>> W O W <<<<<
>
> Can't wait till next weekend for the first race with the new
Supper Trapp exhaust and the cam retimed!!
>
> THANKS!!
>
> Erik Bjorkner
> Mobile, AL
> 76 SPIT # 66 DP
>
>
|