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RC · Joined: 25 Mar 2007 Posts: 2637 Location: Australia

Am considering a new cam and have been looking at those available from Integral.

So I an interested in hearing feedback and comments from anyone who may be running one.
Things like what grind you have and obviously how it performs, any reliability issues, problems, whatever?

Thanks,
Roger

Neil924 · Joined: 18 Mar 2003 Posts: 4225 Location: Canada

morghen · Joined: 21 Jan 2005 Posts: 9102 Location: Romania

what are the prices for these things now ?
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Min · Posted: Sun Sep 30, 2007 9:01 am Post subject:

http://www.integralcams.com/924.htm

330 dollars us for any grind

Min
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Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Who has run one of these in a 931?
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Min · Posted: Sun Sep 30, 2007 9:26 am Post subject:

morghen · Joined: 21 Jan 2005 Posts: 9102 Location: Romania

RC · Joined: 25 Mar 2007 Posts: 2637 Location: Australia

Have exchanged emails with Steve Gruenwald at Integral and found him quick to reply and very willing to help. He recommends the turbo grinds as also being optimal for a blown application. I am considering the stage 1 grind.

As Rasta also asks, Can anyone who has run one in a 931 turbo (or belt driven) give some feedback?

Neil924, what performance increase and/or shift in the powerband did you notice on your NA? Did you lose any low to midrange?

Have been reading previous posts on cams and read Porschev wasnt super impressed with it, or was that before it all was running well?

Roger

bass gt · Posted: Fri Oct 05, 2007 1:12 am Post subject:

Guy's

I have a stage 2 in my race car. Having read A LOT about turbo cams, i don't think these are the route if you have a street car. My race car has nothing below 3k and then comes in with a bang. We tried backing the cam off with a vernier, and it improved the low end but killed the top end. I am seriously thinking of going over to the stock profile or the improved stock. All that i have read sems to point to turbo motors not liking long duration cams. And all that i have read from other peoples experience mirrors my findings.
So in short, be VERY careful going for the high stage cams. I think for a nice streetable motor the stock grind is ideal.
Look at macbdog. he has 5psi at 2k. I have 3 psi at 3k, then all of it. Joakim's power plot is the same, and i am 99% sure he was using an aggresive cam.

Steve
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Neil924 · Joined: 18 Mar 2003 Posts: 4225 Location: Canada

Joakim · Joined: 15 Jun 2003 Posts: 24 Location: Sweden

bass gt · Posted: Fri Oct 05, 2007 8:30 am Post subject:

Joakim!!

Hi, how are you!! Thanks for your mails in the past. Much help, thanks.
Now, concerning cams, i have done a bit of reading and have a germ of an idea forming.
Now longer duration is not a good thing on a turbo engine, for several reasons. What we want is a stock cam but with more lift.
So to this end, i am going to contact Steve at integral, and see if it is possible to make a stock cam, but with a reduced base circle. This will effectively increase the lift, but without opening up the duration.
Joakim, i have a fairly agressive cam in mine too, and have the exact same trait. Nothing until 3.5K, then woosh!! Fun, but not what i want in my race car.
Keep you all posted.

Steve
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Front Wheel Drive is the Devil's work.

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Great job, you guys. Design & test us all up a great new profile!

FWIW, I'd like to see better bottom end torque off-boost, and make up for those characteristics by use of boost up high. . .

rasta
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WeiBe (1987 924S 2.5t) - 931 S3

PORSCHEV · Posted: Fri Oct 05, 2007 10:30 am Post subject:

I can still say that I am unimpressed by the stage 1 cam in the 924 euro engine. My 78 924 with a california spec engine in a much lighter car feels MUCH for powerfull.
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leadfoot · Posted: Fri Oct 05, 2007 3:40 pm Post subject:

How many hp's are you planning on making??
consider that the GT made 210hp and used the same cam as the turbo...
your drive line is rated at about 225, this is what I have pried out of a few porsche dismantlers,
extra duration will lower your dynamic compression, kill your MPG and kill low end under 2000K is trash, vaccum goes down from 20"Hg anywhere to 14"Hg and makes your car harder to start and idle rougher.
extra lift could cause your valve springs to bind,
My cam was made from reducing the base circle and the reduced lift hasn't affected making high Hp's, 208+ SC driveline loss at 9.6psi
stick with stock or improved stock.
The best improvement I have done on the car was to change to the turbo head.
Leadfoot
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