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-   -   ID this cam please? (http://forums.pelicanparts.com/911-engine-rebuilding-forum/776218-id-cam-please.html)

JohnJL 10-13-2013 06:16 AM

ID this cam please?
 
This is from a 2.2 that was built into a 2.7 by a previous owner who advertised it as having solex cams.

I am rebuilding the motor to fix some leaks and freshen things up.

The cams are stamped "Webcam 96 104 102"

I think 1996 was the year of the rebuild so that might be a date stamp.

Webcam doesn't advertise a 104/102 grind. They do list a 104 grind as "Strong mid and upper end performance for large displacement turbo engines. Some loss of idle and low end performance." Here's their build list: Web Cam Inc. - Performance and Racing Camshafts.

I haven't had a chance yet to install and measure lift. Anyone able to say what this cam is, perhaps confirm as Solex?


Sorry the pic is so blurry, I couldn't find the camera so had to use the blackberry.

Thanks!

http://forums.pelicanparts.com/uploa...1381673700.jpg

JohnJL 10-14-2013 04:12 AM

Here are the intake and exhaust valve lifts for the cams, with zero lash:

Intake: 11.27mm 0.4444"
Exhaust: 10.16mm 0.400"

This doesn't match what specs I've seen for S or Solex or any oher cams.

Any help?

Flat6pac 10-14-2013 10:56 AM

Call WebCam, thats the easiest thing and the secretary will tell you.
Bruce

JFairman 10-14-2013 12:50 PM

Yup, and you might get Laurie the owner if she's still owner.. and she'll tell you everything you want to know about them.
They always answer the phone... google Webcam camshafts.

JohnJL 10-14-2013 01:15 PM

I got Faith, who provided the following information in moments;

Valve Timing Information
Engines: Porsche 911 SOHC 12v
Porsche 930 SOHC 12v
Porsche 964 SOHC 12v
Part # 05-071 ; 05-072
Grind # 104/102
SET @ 4.2 - 4.6 MM WITH .1 MM LASH
INTAKE EXHAUST
Valve Lash: .004" .004"
Valve Lift: .450" .408"
Duration: 270° 254°
Duration @ 0.05: 250° 236°
Lobe Center: 97.5° 97.5°
________________________________________
Intake
Opens 27.5° Before
TDC Exhaust
Opens 35.5° Before
BDC
________________________________________
Intake
Closes 42.5° After
BDC Exhaust
Closes 20.5° After
TDC
________________________________________
Valve timing is checked with zero valve lash
@ 0.050 inches of valve lift.
________________________________________
You can find complete instructions on how to degree in your cam shaft on our website: Web Cam Inc. - Performance and Racing Camshafts

She said its their Solex grind. Its different than what DR lists for Solex. I haven't checked Bruce's book yet.

timed to 4.45 left and 4.44 right sides.


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