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      Yesterday, 02:52 PM   #1
justpete
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Question N52 performance cams

Searched, didn't find anything definitive other than locking Valvetronic at max lift and replacing the OE DME with a Motec ECU.

Cat Cams offered to develop a Valvetronic compatible performance cam if I could send them a functional cylinder head and Schrick responded with links to their catalogs that are 404 dead. Nothing online but thought they might have something off-catalog. VAC didn't have anything but I think Cat Cams makes all their cams anyway. Turner sells Schrick but doesn't list anything just like Schrick's site.

Anyone have some suggestions where else to look? Or know of existing Valvetronic compatible performance cams? TIA
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      Yesterday, 03:21 PM   #2
andrey_gta
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Didn't Schrick have some kind of n54 cam on their german catalogue that looked as if it was mis-labelled and maybe was for a n52. There are images that exit on n54 boost of a n52 and cams in development by schrick from years ago
TheAxiom was sniffing around that thread

I think Valvetronic cams would be awesome - if there are enough committed people - look at the AA header pre-buy list
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      Yesterday, 06:46 PM   #3
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I had thought VAC made some cams for an N52, a while back though. I think they were sending them to a race team or something.
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      Yesterday, 07:00 PM   #4
andrey_gta
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VAC has reinforced Pistons or did on their page
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      Yesterday, 07:51 PM   #5
631twentyeighteye
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As long as it kept the valvetronic i'd be interested in cams. I just wish a manufacturer was interested.
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      Yesterday, 09:41 PM   #6
andrey_gta
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Can we not get OEM spec cams reground for more lift or other features?
If this is possible & desirable - its easier than gettign a company to make custom ones - n52 cams already are as light weight as possible
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      Yesterday, 10:25 PM   #7
justpete
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Quote:
Originally Posted by andrey_gta View Post
Can we not get OEM spec cams reground for more lift or other features?
If this is possible & desirable - its easier than gettign a company to make custom ones - n52 cams already are as light weight as possible
But it would require adding material to the cam lobes so they could be reground for more duration and lift. Likely to require different pistons for clearance, etc. Gets complicated if increasing compression ratio. Ain't cheap either way though.
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      Yesterday, 10:56 PM   #8
andrey_gta
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Does it always have to add material?
I was referring to these e36 cam regrinds http://www.westcoastriots.com/
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      Yesterday, 11:09 PM   #9
justpete
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Quote:
Originally Posted by andrey_gta View Post
Does it always have to add material?
I was referring to these e36 cam regrinds http://www.westcoastriots.com/
Sure they don't add material? Sounds like they don't add lift but maybe it turned out a better profile could be ground without adding any or very much material, dunno.

BTW, turns out I pinged VAC but never heard back so I pinged em again.
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      Yesterday, 11:27 PM   #10
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"Regrind" usually involves cutting the base circle of the cam, then using thicker shims or buckets to bring lash back to spec. This increases the peak lift on the camshaft by the depth of the cut. Then consider any rocker arm ratio. Just a few millimeters can be significant.

This is probably a nightmare with Valvetronic due to the extra mechanical complexity.

It doesn't seem common practice on modern engines.
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      Yesterday, 11:55 PM   #11
justpete
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Quote:
Originally Posted by Freon View Post
"Regrind" usually involves cutting the base circle of the cam, then using thicker shims or buckets to bring lash back to spec. This increases the peak lift on the camshaft by the depth of the cut. Then consider any rocker arm ratio. Just a few millimeters can be significant.

This is probably a nightmare with Valvetronic due to the extra mechanical complexity.

It doesn't seem common practice on modern engines.
Thanks! Makes sense, should've thought of that.
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