Calling CAM Guru's

[Bulldog9]

Good afternoon folks. I introduced myself back in the one of the 911/912 Forums some time back, have a 76 912E, and am almost finished parts hording for my rebuild.

Here is a snapshot of the motor, followed by specs for the CAM I am considering. Is a WEBCAM with this grind. I'm inclined to trust the recommendation, but you know the deal, gotta edjumicate yourself, explore all options and I've always depended of Forums for a wide spread of info and experience. Many options and vendors to choose from, and I have little experience with air cooled VW/Porsche (as in this is my first). I've learned a lot over the 2 years I have been tearing the car down and think I have a good plan for a rebuild. Doing most myself, but will take to reputible shop for dyno and proper setup when complete.

MOTOR: Stock Case, Crank & Connecting Rods with new 96mm KB pistons (flat top) and cyls. Heads rebuilt & flowed by reputable shop. Solid lifters, chrome moly pushrods, 911 swivel adjusters & 1.7 rocker arms, Pertronix Distributor, Weber 40's. Looking for a good overall performer, strong midrange performance and driveability. Dont want to race, dont plan to autocross, efficient running is a goal, but fuel economy is a byproduct in my thinking. The other Option is the Raby 9590.

Here are the Cam Specs/profile, appreciate feedback/recommendation. I understand the dynamics of all this, but NOT why this is/isnt important on a Type 4/aircooled motor.

Intake @ .020: Open-36° BT Close- 70° AB
Exhaust @.020” Open-66° BB Close- 40° AT
Lift at Cam -.322"
Duration @.020-286 Duration @.060- 231
Lobe Center – 106

Thanks!

[Nostril Cheese]

What kind of head work was done?

[Bulldog9]

Here are links from the shop that did the work. Also welded up the Smog ports. HAM: Hoffman Automotive Machine, Inc. - Type 4 Cylinderhead Description

***EDIT. I sorted through the data, and came up with abbreviated figures. LIFT of .423 and DURATION of 287.
From my small block Olds days/basic cam knowledge, longer duration generally means better breathing at higher revs, but sometimes poor idle/manifold vacuum if lift and duration are too large.
I checked with my head builder, and confirmed that the springset he used is spot on for this Cam’s lift, and from what I can find, the 287 duration is on the middle-high end as far as performance, etc. I’m thinking with the .423 lift and longer duration, this will work well. Goal is drivability, strong mid range power.
I’m eliminating all smog equipment, including the air injection, EGR circuit, and Thermo Reactors, so I’m thinking this will work well with the Weber 40’s. Appreciate any feedback on experience. I fully understand these motors are very part specific and each ‘recipe’ is unique, so I’m not looking for a guarantee, just some general feedback and thoughts. Of course now all my research on cams has opened up the ‘what lifter do I use’ debate…….. And I thought rebuilding this little VW engine would be easy…… sheesh……….