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Adjustable cam gear question
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bradelporsche  



Joined: 29 Mar 2008
Posts: 51
Location: VA

PostPosted: Sun Mar 30, 2008 2:18 pm    Post subject: Adjustable cam gear question Reply with quote

Will This fit the 2.0 liter porsche 924?

http://www.bildon.com/catalog/DetailsList.cfm?ID=ZVW.109.500-75&Nav=6&SubNav=none
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RC  



Joined: 25 Mar 2007
Posts: 2634
Location: Australia

PostPosted: Sun Mar 30, 2008 3:24 pm    Post subject: Reply with quote

Welcome to the 924 board.
This is the place for 924 owners as I notice you didnt get much response on the Pelican forum.

YES. I am sure that will fit alright. There are a few different ones for the 8V VW engines around. As 924RACR said, it isnt a bad price. However here is one from Techtonic Tuning that was $70 about a year ago.



Roger


Last edited by RC on Sun Mar 30, 2008 5:45 pm; edited 1 time in total
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bradelporsche  



Joined: 29 Mar 2008
Posts: 51
Location: VA

PostPosted: Sun Mar 30, 2008 3:46 pm    Post subject: Reply with quote

Thanks for the tip, but they are sold out on the red cam gear .
ive also got some question im installing some VW Flatop 87.97mm pistons and when i first bolted on the head the valves would hit them so i just grinded
the lobes about 4 - 4 1/2 mm, Will this open the valve enough as far as it wont underpower the engine?
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Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11378
Location: PacNW

PostPosted: Sun Mar 30, 2008 4:00 pm    Post subject: Reply with quote

Hey Rog, about that tensioner. . .


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Smoothie  



Joined: 01 Jan 2003
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Location: DE (the one near MD, PA, NJ)

PostPosted: Sun Mar 30, 2008 4:04 pm    Post subject: Reply with quote

That's an old pic - it was corrected already.
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RC  



Joined: 25 Mar 2007
Posts: 2634
Location: Australia

PostPosted: Sun Mar 30, 2008 4:06 pm    Post subject: Reply with quote

bradelporsche wrote:

ive also got some question im installing some VW Flatop 87.97mm pistons and when i first bolted on the head the valves would hit them so i just grinded
the lobes about 4 - 4 1/2 mm,


Tell us your joking, please!

Personally haven`t had any experience with VW pistons but others here have used forged VW #1 pistons, albeit with a 931 head that has recessed valves. Using the search button above and entering VW pistons will give you lots of information.

Milling a notch on the pistons is common practice for valve clearance. If you are actually serious about removing 4mm from the cam lobe I think you will have difficulty pulling toilet paper off the roll, if at all! And that will likely be the least of your problems.

Roger
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RC  



Joined: 25 Mar 2007
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PostPosted: Sun Mar 30, 2008 4:09 pm    Post subject: Reply with quote

Rasta Monsta wrote:
Hey Rog, about that tensioner. . .



Its all cool Rasta.

Smoothie right about that.

Roger
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Rasta Monsta  



Joined: 12 Jul 2006
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PostPosted: Sun Mar 30, 2008 4:14 pm    Post subject: Reply with quote

I remember m8, just messin with ya!
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bradelporsche  



Joined: 29 Mar 2008
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PostPosted: Sun Mar 30, 2008 4:21 pm    Post subject: Reply with quote

my bad i meant 3mm is that too much?
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tuurbo  



Joined: 08 Aug 2007
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Location: East Windsor, New Jersey

PostPosted: Sun Mar 30, 2008 4:52 pm    Post subject: Reply with quote

Can you put that puppy on a turbo?
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RC  



Joined: 25 Mar 2007
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PostPosted: Sun Mar 30, 2008 5:50 pm    Post subject: Reply with quote

bradelporsche wrote:
my bad i meant 3mm is that too much?

At least 3mm IMO.

Tuurbo wrote:
Quote:
Can you put that puppy on a turbo?

Sure!

Roger
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Rich H  



Joined: 10 Jun 2007
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PostPosted: Sun Mar 30, 2008 6:38 pm    Post subject: Reply with quote

3mm is a quarter of max standard lift... also the cams have a very hard coating, have you replaced this? If not they will eat your follwers and wear round very very quickly.

I think you will find you have good medium range torque, but the top end will be seriously compromised and it will run out of power well before 6k.

Whe you say valves met the pistons, do you mean that the engine could not be turned over or that the valve and pistons could hit each other if the cam belt breaks? I would imagine its the latter which is just somethign you will have to live with on a sporty engine. Most modern engines are interferance as well as the 924 turbo and the 924S. Get another camshaft and live with it...

Rich
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Rasta Monsta  



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PostPosted: Mon Mar 31, 2008 2:22 am    Post subject: Reply with quote

. . .where the wind goes whistlin' through your brain!

Is that what they call a "custom grind?"
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bradelporsche  



Joined: 29 Mar 2008
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PostPosted: Mon Mar 31, 2008 2:25 am    Post subject: Reply with quote

I meant the engine could not be turned over. I have installed some mahle 87.97 pistons which are not dished as the stock ones. wouldnt the higher compression compensate at higher rpms?
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Rich H  



Joined: 10 Jun 2007
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PostPosted: Mon Mar 31, 2008 4:18 am    Post subject: Reply with quote

As I said, I suspect at low revs they would but your 9mm lift would become the choke point of your design.

This is all speculation though.

Did you resurface the cams?
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