Craig Bennett Posted February 2, 2009 Share Posted February 2, 2009 Decided to strip my old P.I engine down from my estate over the weekend. I was mainly interested in checking the spec of the cam as had been told it was a TR5 cam when bought the engine some years ago. Engine always ran well and revved to 6000rpm pulling strongly as Mr Chatterton I'm sure will testify! Countless times flew past the 'Yellow Peril' on way back from club meets, much to his disgust as my estate was a real ratter!! Anyway cam is marked Stanpart and has MC 24333 number on it. Sprocket end appears to have one 'ring' so am I right in presuming it is a TR5 cam? Bit past it anyway, finish on some lobes is starting to deteriorate so unfortunately not really useable! Reason for asking is am just about to do a bit of a 'freshen up' on BWK as getting a bit tired now. Got new S head and was hoping to use this cam, TR6 spec metering unit etc. Link to comment Share on other sites More sharing options...
AlanChatterton Posted February 2, 2009 Share Posted February 2, 2009 I don't know the markings, so I can't help.But, from driving it, it felt like a TR5 cam......... I had one in my old MKI PI and it pulled in the same place as that.Hoping someone with some techy knowledge will confirm this.........! Link to comment Share on other sites More sharing options...
shuey Posted February 2, 2009 Share Posted February 2, 2009 All engine no. CP (150 bhp 2 rings on front journal)All engine no. CR (125 bhp 3 rings on front journal).tr5 had cp engine Link to comment Share on other sites More sharing options...
Alex Posted February 2, 2009 Share Posted February 2, 2009 The gt6/vitesse cam is one thick ring is'nt it? Link to comment Share on other sites More sharing options...
Alex Posted February 2, 2009 Share Posted February 2, 2009 If so I think thats the same as a 132bhp PI cam? Link to comment Share on other sites More sharing options...
Pete Lewis Posted February 2, 2009 Share Posted February 2, 2009 cant find the info to compare but tr5 is one groove Pete Link to comment Share on other sites More sharing options...
Alex Posted February 2, 2009 Share Posted February 2, 2009 Is tr5 a narrow ring and gt6/vitesse etc a broad ring perhaps? Link to comment Share on other sites More sharing options...
Alex Posted February 2, 2009 Share Posted February 2, 2009 Just found an old thread in the 2000 section titled what pi cam have I got.....this touches on the subject.Might help? Link to comment Share on other sites More sharing options...
Craig Bennett Posted February 3, 2009 Author Share Posted February 3, 2009 Thanks for that. Would appear it is a TR5 cam then. Have to say not really sure what to do as BWK goes very well at moment on original metering unit etc. Just puffing a bit of blue now (valve guides) and slight oil seepage from nearside of block. Thought good idea to use the NOS S head I acquired. May well keep original cam as engine pulls well anyway. Thanks for all your help. Regards. Link to comment Share on other sites More sharing options...
Clive Posted February 3, 2009 Share Posted February 3, 2009 I guess you are aware the S head is a lowish compression? and smaller valves? Just a thought.... Link to comment Share on other sites More sharing options...
Craig Bennett Posted February 3, 2009 Author Share Posted February 3, 2009 Yes will be getting the head skimmed to correct the compression ratio. Was told the S head flows better and is a good mod on a P.I engine. That was my reason for going this route. However I stand to be corrected on this point !! Link to comment Share on other sites More sharing options...
andy thompson Posted February 3, 2009 Share Posted February 3, 2009 Best thing for a PI is a Pi head... spend your money on decent unleaded exhaust seats and new valves/guides... use your existing head... as you say it goes fine :). TR5 cam has two narrow rings btw but most obvious feature apart from that is 0.250" lift (Pi is only 0.230"). Link to comment Share on other sites More sharing options...
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