Cat Cams?

[jdbubb at ix.netcom.com (Dan Bubb)]

Couple thoughts about cams (as if anybody wanted to know!)
It's tough to compare cams from different manufacturers.
The first thing to check is to make sure that the duration specs are quoted at the same lift. Some
manufacturers will quote duration at .020" lift, others at 1mm (.040") and yet others at .050". If
you've looked at TT's cam spec page you can see what a huge difference in duration that makes.
Unfortunately, lift and duration don't tell the whole story. It's the area under the curve that
matters and it can vary quite a bit within the same lift and duration numbers depending on how much
acceleration of the valvetrain is designed into the cam profile.
And last but not least you also need to compare lobe centers. Different lobe centers for the same
lift and duration will, again, change engine performance.
Anyway, I guess the summation is that it's hard to tell if a cam from one manufacturer is going to
be more aggresive or have a better idle or whatever than a cam from another manufacturer just by
looking at lift and duration numbers. You'd actually have to test to find out.
or at least that's my .02
Dan

----- Original Message -----
From: "Rick Kellner" <rfkellner@snet.net>
To: <scirocco-l@scirocco.org>
Sent: Thursday, December 30, 2004 9:43 AM
Subject: RE: Cat Cams?


Brian, I have only heard good things regarding Delta cams.  I actually
have a new Euro intake cam from Delta that is up for sale.  I am looking
for a more aggressive set than the Euro grind.
I am interested in comments on the Cat grind, it looks to be between the
TT Street set and the TT Sport set.  If you read the description of the
characteristics of the two TT cam sets you will see that they produce
different 'drivability' results.  All of the cam sets (shown below) have
lower lift than even the Schrick 260s.
Thanks, Rick.

Cat Cam #7661210
Intake/Exhaust
266 / 262? Duration
.430 / .430 Lift (in)

TT Street
Intake/Exhaust
254 / 254? Duration
.423 / .423 Lift (in)

TT Sport
Intake/Exhaust
268 / 268? Duration
.438 / .438 Lift (in)



-----Original Message-----
From: Brian McGarvey [mailto:bmcgarvey@gmail.com]
Sent: Wednesday, December 29, 2004 11:44 PM
To: Rick Kellner
Subject: Re: Cat Cams?

Dood.
Do the http://www.deltacam.com/ regrind..
you can get any profile you want, but schricks are the way to go..
Brian



On Wed, 29 Dec 2004 21:29:51 -0500, Rick Kellner <rfkellner@snet.net>
wrote:
> Does anyone have experience with Cat Cams?  The vortex link, below,
has
> sparked my interest.  My question is really directed to 16V cam set
> #1210 however; it appears they make cams for everything.  They also
have
> a lot of technical information regarding each application but it lacks
> any specific torque/HP impacts.  I have included the link to Cat Cams
> and the vortex thread.
> Thanks, Rick.
>
> http://www.catcams.be
>
> http://forums.vwvortex.com/zerothread?id=1451062
> <http://forums.vwvortex.com/zerothread?id=1451062&page=1> &page=1
>
> _______________________________________________
> Scirocco-l mailing list
> Scirocco-l@scirocco.org
> http://neubayern.net/mailman/listinfo/scirocco-l
>



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