Absolutely agree. I need to check it again where it will be. In trying to figure out extents of useable travel on the cam I found that P2v was close to perfect with intake valve open about .065”, exhaust valve about .058”. I say about because I didn’t have clamps to get the indicators clamped to the head but those are within a few thou and the relative magnitude between measurements should be closer than a few thou.
Schrick calls out 2.2 and 1.7mm (.087 and .067”) for their “284/272” and cat cams 2.3/.9mm (.091” and .035”) for their 294/273 so I figure I am headed in the right direction. One thing that isn’t clear to me is the lift numbers and how to compare schrick to cat cams, to what I have (supposedly 10.5mm). Digger, I think I remember seeing you mapped out some cams for one of your motors, do you have any of those plots available (photobucket sucks).
I guess the right way to move forward would be to map out the cam to figure out what this thing actually is and go from there, right? I think I’m too much of an engineer to just say good enough without knowing the whole story.
I should be able to get better numbers sometime this week. Thanks for the input here guys, I definitely appreciate it.
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^ What he asked is crucial to timing. Especially for asymmetrical camshafts.
Get it at the marks and measure valve lift.Leave a comment:
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Digger, that’s what I ended up doing and that ended up being about 1 tooth more retarded than “zero”. P2v looks much better. Also dropped the lash to .010” from .008” based on schrick recommendations for their cams. It’s just aggravating that the suppliers response is “set it to tdc” and “we don’t have any problems on our m20’s”. The lack of information and knowledgeable support is why I’m a little nervous, not to fix the p2v.
Not sure how much was taken off the head but I may be able to measure height tonight, for reference.
Stock bottom end b25. Stock goetze gasket going in but used the old oem style gasket to measure clearances.Leave a comment:
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I would also like to know more info. Purchasing a new cam would put you in the same situation, as it's lift that will cause more issues than CL.Leave a comment:
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You aren't supposed to degree cam to fix lack of p to v.
Unless it is massively advanced off the bat then degreeing it may not solve your p to v and a new cam doesn't solve your issue unless it has less lift at tdc
What Pistons ? What gasket ? How much was removed off head or block ?Leave a comment:
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Bimmerheads reground cams?
Hey guys,
Anybody have any experience with the reground cams from bimmerheads, specifically the 280/274? I bought one and there is no cam card and no instruction on how to degree the cam. Bimmerheads support assured me that setting it to tdc will be fine. When asked again for numbers I got the same response.
Problem is that my head has been decked and my p2v clearances are way too tight on the intake side with everything at “zero”.
Kinda wish I bought a new cam.
Any input or other ideas on who to contact?
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