911S 2.2 cam grind choice?

[Bill S]

I have enjoyed reading all the threads but I have not been able to answer my questions. I am looking for suggestions on the best cam for solid low and medium RPM torque and drivability (safe but spirited driving and maybe an auto cross).

I have a 1970, T case, stock T crank, Webber 40's and good 2.2S p&c, I have read about the E, Solex and S cams and am leaning toward an E or Solex grind???

-What issues will I have to deal with running the above cams with my 2.2S p&c?
-What recommended "improvements" should I include on this engine rebuild?
ie. 2.0T heads re-worked to?
distributor?
-Any thoughts on assembled performance?

Thank You - for your suggestions and Happy New Year!
Bill
'70 914-6 (enjoyed my car since 1978).

[BURN-BROS]

Welcome Bill,

You have a couple of nice choices from Dougherty racing cams.

DC30 (mod solex)

DC40 (mod S)

Based on what you are looking for, go with the DC30 as it gives you a little both the E and S.


Heads.... 2.0 liter heads would need to be modded to fit 2.2. Better solution is to source a set of 2.2-2.4 heads. A much better head.

Case savers, piston squirters,oil bypass mod and a 3.0 liter oil pump would be on my list.

[Steve@Rennsport]

Originally Posted by Bill S

I have enjoyed reading all the threads but I have not been able to answer my questions. I am looking for suggestions on the best cam for solid low and medium RPM torque and drivability (safe but spirited driving and maybe an auto cross).

I have a 1970, T case, stock T crank, Webber 40's and good 2.2S p&c, I have read about the E, Solex and S cams and am leaning toward an E or Solex grind???

-What issues will I have to deal with running the above cams with my 2.2S p&c?
-What recommended "improvements" should I include on this engine rebuild?
ie. 2.0T heads re-worked to?
distributor?
-Any thoughts on assembled performance?

Thank You - for your suggestions and Happy New Year!
Bill
'70 914-6 (enjoyed my car since 1978).

Hi Bill,

Just to add some additional thoughts to Aaron's,.....

If you want "solid low & medium RPM torque", your best choices are either your stock T cams or perhaps an E cam. This fit the "mission" better than Solex or Mod- S.

2.0 heads are the worst heads (powerwise) Porsche made; your 2.2 heads can either be used as is with the T or E-cams for max torque and throttle response, or opened up to match a Solex or Mod-S cam.

Those 2.2S pistons will really help you due to their compression ratio, however be careful about ignition advance with T or E cams, given CA's poor gas.

[Bill S]

Thank you Aaron and Steve for your guidance.
This is solid informtion for my rebuild.
I will keep you informed.
Bill S.