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No #2 On My Cam Flange


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The "What Cam Do I Have" question has been asked many times, as my searching has proven, but most of the threads leave the question unanswered.  "Do you think there's any chance it has a hotter- than- stock cam?" was asked in another thread today, so I took my valve cover off to inspect mine.  

 

The number 12106100802 brings up a lot of search-hits.  I believe it is a BMW number, but that does not necessarily mean it is a stock 264 cam.  The stock cam apparently has a #2 stamped on the flange which the sprocket bolts onto, but mine has no such number.  

 

I did notice that there is a removable link in the timing chain, which I believe implies that the chain has been replaced, so someone has 'been in there'.  

 

 

 

I know so little about the history of my car, that every little piece of information is helpful.  Apparently removing the sprocket will likely reveal information on the front of the cam flange, but I don't think I am up for that today.  

 

 

 

Does measuring total lift with a dial indicator provide helpful information about my camshaft, without the addition of a degree wheel and special mathematical equations?

 

I measured .279" lift on an exhaust lobe and .290" on intake.

Based on these numbers (and the lack of a #2 on the flange), does anyone know what cam I have?

(searching for these numbers was not productive)  : /

 

TIA for any input.

Tom

 

 

 

Edited by '76mintgrün'02

     DISCLAIMER -- I now disagree with much of the timing advice I have given in the past.  I misinterpreted the distributor curves in the Blue Book as timing maps for our engines.  I've also switched from using ported-vacuum to manifold, with better results.  I apologize for adding confusion.  (3-28-2024)  

 

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  • Solution

 

Does measuring total lift with a dial indicator provide helpful information about my camshaft, without the addition of a degree wheel and special mathematical equations?

 

I measured .279" lift on an exhaust lobe and .290" on intake.

(searching for these numbers was not productive)  : /

Well what it's worth but out of curiosity i measured oem cam and it gave .272" lift so you've got something there but it falls a tad shy of Schrick 292's .299" lift (i & e). I'm afraid that without degree wheel & maths there is nothing else to be found. Delta Camshaft might have cam card from which degrees could be retrieved?  

2002 -73 M2, 2002 -71 forced induction. bnr32 -91

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Delta Camshaft might have cam card from which degrees could be retrieved?  

 

Thank you tzei.  

 

 

I realize that I am in over my head, when it comes to cam geometry.  I was just hoping there was a simple answer, based on my simple measurements.  I am not sure the answer would mean much to me anyway (aside from, 'is this a stock cam?').   :unsure:

 

Based on your measurements, the answer to that question is "no".

 

(edited-- for simplicity's sake)

Edited by '76Mintgrun'02

     DISCLAIMER -- I now disagree with much of the timing advice I have given in the past.  I misinterpreted the distributor curves in the Blue Book as timing maps for our engines.  I've also switched from using ported-vacuum to manifold, with better results.  I apologize for adding confusion.  (3-28-2024)  

 

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