Try calling him. He is usually at his dyno room,which is different than his office phone number.

I don't know the number but I think his answer machine tells you that number.

 

jimbo1111

You did the right thing by calling John Milledge.

And you can make a ton of power on stock valves.

I made 401RWHP using a JME head/cam with stock valves on a 2.5L at 17psi (415RWHP at 18psi)... with other modifications.

Something to note... installing larger valves only to have them packed up against the combustion chamber wall is like taking 2 steps forward, and 1 step back. The valves become shrouded big time, killing a lot of the benefit of the larger valves....

But... on a larger bore engine (104mm-106mm), you can really take advantage of the larger valves since you can open up the combustion chambers to unshroud the valves.... which is one big benefit of doing a large bore engine.



TonyG

 

BUMP...

whats new on the CAMS subject ?

Any ideas or experiences ????

 

your all too damn keen to spend get the NA cam i found it a great uprade my car makes heaps more torque at preboost and any boost and its definatly the ultimate cam if you have a moddest turbo i would say the NA cam is the best cam up to 430hp it cost bugger all so you can spend your money on big exhuast and fancy turbos wich are a proven thing . there are drawbacks to massive cams no drawbacks to massive exhuasts .

 

you mean the NA 2.5 944 cam ????
Haven't heard of this upgrade before

 

You are right about that. I have a converted NA that I used the cam from and it was faster than the stock turbo according to other turbo owners. More exhaust lift so breaths better is the mantra

 

I am going with Dave (Evil) <CEP>CAMS

 

blahblah

 

There is 1mm more lift (exhaust side). I suppose that 1mm does not make that much difference. More important is cam lobes duration times. Early N/A cams (same as 951) values are the following:

Intake opens 1 degrees after TDC
Intake closes 49 deg. after BDC

Exhaust opens 43 deg. before BDC
Exhaust closes 3 deg. before TDC

"new" N/A cams values:

Intake opens 1 degrees after TDC
Intake closes 49 deg. after BDC

Exhaust opens 47 deg. before BDC
Exhaust closes 1 deg. before TDC

2.7L N/A has the same values

So, only the exhaust side lobes are different.

 

Is this really enough to make a discernible difference?

 

i had different numbers cant find them at presant but as i remember the exhuast duration goes from 219 up to 228 and inlet from 224 to 228 and a web cam is about 232.i just got a report of the web cam making a midrange torque loss with a standard tubo and almost (motec)standard car

 

The numbers i gave are directly from Porsche WSM

 

I have an NA cam, the car feels better at higher revs but I am not too sure bc I also added an aluminum flywheel at the same time.

 

So the early N/A cams are the only cams upgrade ?

 

No,early N/A cams are the same as the turbo cam. If want to stick with a Porsche cam then go with the 85.5 later N/A cam which has more exhaust duration.
If you want to go with an aftermarket cam though there are many options available.