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Title: scat c25 out of spec Post by: JIMP on May 10, 2020, 20:51:50 pm Hello all, I have an issue with a T4 c25 cam, first time happens to have that much of an error on cam and I'm not sure how I go past over this issue, as in the intake opening is relatevily OK -like 2 degrees retard in the actual wheel position the intake closing comes wayy later, instead of 47? degrees ABDC -if i recall correctly- closes at 55 degrees, so seems as being bigger actual duration, its more close to tthe c35 I think but its max lift matches the c25. now question is, I drop it completely and go for another one? -as I suggest I have to check all 4 lobes to be sure we're OK- or I use it as is but I dial it at 108o inlet lobe as is the manufacturer recomendation? let me hear your thougths please
Friendly Dimitrios Title: Re: scat c25 out of spec Post by: JIMP on May 11, 2020, 08:28:12 am OK back to the topic, I saw again the spec card for the scats, so my cam seems to be a C35 actually as duration BUT with a C25 lift! has anyone had any experience with those -or other- camshafts? as after the c25 spec was way retarded, I modified the wheel to get advance, so now I have IO 16,75o IC 50,5o so like 107o inlet lobe center (106,875o to be precise). and so I leave as this is the recomendation of scat for c35 (it has IO 17o IC 51o so 107o center)
BUT max lift is per c25 spec, its 8,65mm (advertised 8,89mm) I'm thinking of leaving it as is, I;ll try to get also a measurement from the exhaust lobe to check whats happening, as I;m afraid now that maybe it has more issues, did you had any issues of this kind or just me eyes -and mind probably- need calibration? maybe I have to be reseted before going further and get it from the beginning! friendly Dimitrios Title: Re: scat c25 out of spec Post by: Dougy Dee on May 11, 2020, 13:31:38 pm Cust bought a T1 C25 cam for me to use in 2018. 3 lobes had different lift profiles... Base circles were different.
What a goofy mess. CIP! said "WHAT? Never". Title: Re: scat c25 out of spec Post by: JIMP on May 11, 2020, 20:15:15 pm This is what I\m afraid of, if it happened to one lobe what tells me its Ok to the others? and I have to check now all of them to see whats happening, good thing is I have another one from another guy, bought from another part so probably other banch, I would like to see if OK or the error is there repeatably. Dont ask me why as I dont know the answer but never was a fan of scat cams, I have used webcam and engle for "simple" motors and JPM for the special ones, never had an issue like that
Friendly Dimitrios Title: Re: scat c25 out of spec Post by: Martin S. on May 11, 2020, 23:06:34 pm The ladies at Webcam would never let that out the door ;D
Title: Re: scat c25 out of spec Post by: JIMP on May 13, 2020, 20:36:09 pm yes Martin, probably you're right on this!
Friendly Dimitrios |