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Are there any difference between 20 and 25 CAS?

mabru

By mabru,
in Engines & Forced Induction

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mabru Enthusiast

mabru

Posted
Posted

The bearing on my RB25DET CAS was toast, so I took the CAS off of the RB20DET I happen to have sitting around. My question is are there any mechanical/electrical differences between the two? My RB25DET does not run right at the normal base timing anymore at all. I had to advance the hell out of it (with no knock mind you) just to get it to run correctly. Can anyone shed some light on my timing issue? It runs great, it's just a little disconcerting to put a timing light on it and see 27 degrees base when I know it should be closer to 15.

Thanks,

-Matt

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