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difference in cams

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Old Oct 19, 2010 | 07:47 PM
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Default difference in cams

say you have a 2011 103 motor,2 into 1 exhaust,se style air filter,no head work and need a cam for low end torque and power from 1500 to 5000 or so.how much real difference is there between all the 255,204, 37, 5-6,6 and what ever number cam is there as far as performance?if they have 235 to 240 duration @53,about the same timing events,how can 1 or 2 brands seem to be so much better than the rest?is there any one cam that is say 8 to 10 hp or so better than the rest and like wise with torque?
 
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Old Oct 19, 2010 | 08:34 PM
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First thing you need to do is narrow the target operating range for the cam; none will deliver from 1500-5000 rpms.
 
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Old Oct 20, 2010 | 10:10 AM
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Beyond what they do, lift and duration, the timing of when they do it varies considerably and is of equal importance.
 
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Old Oct 20, 2010 | 11:57 AM
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Call and talk to dave mackie @ davemackieengineering.com or tr reiser @ tmanperformance.com , they have forgotten more than most people know about cams!
 
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Old Oct 22, 2010 | 01:23 AM
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Check out Cycle Rama's 575 cam for bringing maximum torque down to the useable range of 2500 to 4000 rpm. It gets high ratings throughout this forum. Google Cycle Rama and speak with Wes.
 
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Old Oct 22, 2010 | 05:46 AM
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Originally Posted by gpp
say you have a 2011 103 motor,2 into 1 exhaust,se style air filter,no head work and need a cam for low end torque and power from 1500 to 5000 or so.how much real difference is there between all the 255,204, 37, 5-6,6 and what ever number cam is there as far as performance?if they have 235 to 240 duration @53,about the same timing events,how can 1 or 2 brands seem to be so much better than the rest?is there any one cam that is say 8 to 10 hp or so better than the rest and like wise with torque?
I responded to this on another message board.
First off, the 255 is a turd. Period. Take that off you list.
You not going to have a cam that pulls hard from 1500 to 5000, with a plug/play model.
Any of the others will work, if set-up correctly, ie, not plug/play, and there will not be a seperation of 8-10 hp between any of them.
One cam/combo that comes to my mind that could work at the compression the 103"er is running at, is an Andrews 26, and you could use the S/E 1.725 rocker arms with it.
Scott
 
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