[blau911]

Wayne,
I had a 2.4E engine rebuilt a few months ago which is currently in my 67 911. It was rebuilt using the following:

- Weber IDA40's with ported 39mm intake manifolds
- 2.4e pistons and cylinders
- flycut 2.4S heads ported and polished (ports were opened up from 32i/32e to 39i/36e).
- Webcam mild race cams. The grind is 120/104. Lift in = .476
Lift out = .450
Duration in @ .050 = 264
Duration out @ .050 = 248

The car runs like the wind once the rev's go above 2,500 rpm's and pulls all the way up thru 7k rpm's. However, the car is very sluggish from a dead stop in 1st gear until I get above 2k rpm. As a result, I am wondering if the primary loss of my low end torque is due to over aggressive cams, or the large increase in porting - or a combo of both.
I had planned to use the original E cams. However, they needed to be re-ground. A local race shop I deal with had these fresh 120/104 cams sitting around and offered me a good deal for them. I went with them instead of having my E cams re-ground.
Webcam describes these cams as hot street/mild race cams. I have another set of Solex cams and a pair of stock S cams. I am wondering if the low end problem would be corrected simply by going with different profile cams, or if the problem has more to do with the larger porting and not the cams.
The question: What is the co-relation between port sizes and cam profiles, and is there some way I can calculate the amount of add'l low end torque I would get by switching out the current high profile cams with Solex or S cams before making the switch?

Thanks

P.S.
It was very interesting to read in your book how much of a decrease in engine temperature can be obtained simply by cutting off an inch from the inner air deflectors. The 10-15 degree reduction seems to be a much cheaper alternative than dropping big $$$ on a front mounted oil cooler. My engine temps hovers around 220-225 on a warm day. I was planning on going with a front oil cooler set-up, but am excited about trying this first to see if I can avoid having to spend the extra $$$. Have you actually done this modification yourself and seen a 10-15 degree reduction?