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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 05-10-2009, 09:17 PM   #21
aggieE46
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The key word is "imagine".

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Originally Posted by nightrunner20 View Post
yes but NOS is not good 4 an engine. and when its stock I would imagine its even worse.
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Old 05-11-2009, 04:53 AM   #22
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Do you have any experience with this?

I'd like to know who is going to weld material onto a hollow camshaft, and what heat treatment they would apply to fix the problems in metalurgy.
I just had my motorcycle cams welded + reground and they're hollow. Company also quoted me 300 for the m54 cams.
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Old 05-11-2009, 05:22 AM   #23
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I just had my motorcycle cams welded + reground and they're hollow. Company also quoted me 300 for the m54 cams.
That's suspiciously cheap for hot tanking everything, preheating a pair of camshafts, individually TIG welding 24 cam lobes, machining both camshafts, and heat treating them.
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Old 05-11-2009, 10:42 AM   #24
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It's not uncommon. And most of that added lift comes from a smaller base circle from what I understand.

Still I prefer Brand new grinds to re-ground cams, but it's not my car



These are JWT cams going in, made from brand new Nissan blanks. Awesome.

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Old 05-11-2009, 12:49 PM   #25
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That's suspiciously cheap for hot tanking everything, preheating a pair of camshafts, individually TIG welding 24 cam lobes, machining both camshafts, and heat treating them.
Not really. Standard price for pretty much any engine to weld + regrind is about 150 a cam-even amongst difference grinders. I've had plenty done. You just have to go straight to the grinder and not a middleman "performance shop" that sends it to the same place and tacks on their own profit.

I was actually trying to wait for sharkedit before i got my cams for the m54 ground (Wanted to actually tune it, not send ecu out for a "best guess" tune)-but since that seems to be a big failboat I might just bite the bullet and hope for the best.
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Old 05-12-2009, 09:17 AM   #26
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Reground cams work just fine as long as they're done right. Back in the 80's I had the cam reground on my Rabbit and then my Audi 80. The Audi was done in 1988 and that car is still running today. So, it did work and was reliable. My Rabbit was done when I was in high school and I drove that thing like a kid in high school. It was amazing how that motor lasted 2 years with me revving the poop out of it (up to 8500 rpm). The cam survived, it was the bottom end that decided to give up the ghost. I then built a new bottom end out of junkyard parts and it lasted well beyond my ownership.

I suggest this place for grinding cams:
http://www.webcamshafts.com
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