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Old 11-09-2010, 09:48 AM   #1 (permalink)
IronButt
 
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Cycle Rama CR-575 Cams...TDC Lift Correction

Cycle Rama CR-575 Cams...TDC Lift Correction

Previous reported numbers------ .270 Intake TDC .180 Exhaust TDC (two seven zero / one eight zero)
Correct numbers are------ .156 Intake TDC .109 Exhaust TDC (one five six / one zero nine)

In defense of Wes Brown (designer of the cam) he was issuing the TDC lifts as given to him by Andrews Products (manufacturer of the cam). A few phone calls and some digging by Andrews, Andrews was very helpful and found where the problem was...incorrect hand written and verbal numbers. AP manned up and took the responsibility here. Chit happens. The "at-the-cam" data was pulled from the AP data base and the correct TDC lifts were derived.

The other cam specs remain the same:
Intake 15/35 .575Lift 230Dur 100LC
Exhaust 49/07 .560 Lift 236Dur 111LC
OVLP 22

A good thing is, no one bent a valve due to "under"-stated TDC lifts.
And, the Cycle Rama CR-575 was/is more user friendly in builds than previously thought with the initially reported TDC numbers.

Great cam Wes.

WFOLarry, thanks for encouraging this inquiry.
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Old 11-09-2010, 10:24 AM   #2 (permalink)
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I'll post this over here to as the response is probably more appropriate here than over on HTT..


Herko,

Thanks for looking further into this.. I'm sure it helps builders to know what is allowable. It would me if I were using that cam.. My questioning wasn't to pick on anyone but make sure those first numbers were correct. They didn't make sense to me..

It does look like a good cam to me..

Thanks,
Bruce
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Old 11-09-2010, 08:25 PM   #3 (permalink)
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Thanks Herko. Is this a good bolt in cam for a 96 in a Softail?
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Old 11-10-2010, 08:18 AM   #4 (permalink)
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"Is this a good bolt in cam for a 96 in a Softail?"

Yes it is.
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Old 11-10-2010, 08:19 AM   #5 (permalink)
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Thanks Bruce.
John
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Old 11-10-2010, 12:32 PM   #6 (permalink)
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RE CR-575 tdc lift

Thanks Herko

Glad to see this, as far as tdc lift..Thought that was rather radical..thats top-fuel stuff...

I had the question posted in another thread..glad i found the specs in this one..

Appreciate the good work,, I'll be giving Wes a call..

Again,
Thanks a bunch

Bill
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Old 11-10-2010, 01:08 PM   #7 (permalink)
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Herko sells the cam, I just bought one from him. Gave me some good tips on the Mastertune calibration too! Nice guy.
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