Cam and valvetrain longevity....??? low duration high lift...
09-22-2016 | 10:39 AM
#411
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From: Olmsted Falls,Ohio Marblehead,Oh
Wonder if bob thought I wanted to spin 5500?? I have sheet I faced to him at home, said I wanted 700@6000
With that info, now keep in mind, that was with a flow cfm, of an average aftermarket bbc head. If I was to go off AFR"s advertised numbers, for the 325 CNC ported head, the program would show for tims 540,
242/248 duration at .050, for a 5500RPM max engine combo. Tim has 241/246. Pretty darn close right? By looking at his dyno sheet, would it be safe to say, his engine was about done making power around 5500?
Maybe its just a coincidence. Or, maybe this program, is halfway accurate.
242/248 duration at .050, for a 5500RPM max engine combo. Tim has 241/246. Pretty darn close right? By looking at his dyno sheet, would it be safe to say, his engine was about done making power around 5500?
Maybe its just a coincidence. Or, maybe this program, is halfway accurate.
09-22-2016 | 10:39 AM
#412
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From: chicago
How about that engine in the article SB posted. 502ci, afr 325's, looking to make max power at 6000rpm. It actually peaked at 6200, but....using a tight lash setup, program says
245/252 @ .050.
That engine, had a 245/250 solid.
245/252 @ .050.
That engine, had a 245/250 solid.
09-22-2016 | 10:44 AM
#413
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From: Olmsted Falls,Ohio Marblehead,Oh
Sooooo... More cam needed...
09-22-2016 | 10:49 AM
#414
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From: chicago
Its just a software program, and we all know how computer programmed engine builds can go. At the end of the day, you're exact combo, was spec'd from a combination of software, and gathered data. Problem occures, when you're relying on second hand data, to spec' engines for someone. There's a ton of factors involved.
Its still best to validate things on an engine dyno, making changes 1 at a time. Thats engine development.
Its still best to validate things on an engine dyno, making changes 1 at a time. Thats engine development.
09-22-2016 | 10:52 AM
#415
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From: US of A
More duration, Timothy, more duration.
09-22-2016 | 11:24 AM
#416
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From: Olmsted Falls,Ohio Marblehead,Oh
09-22-2016 | 12:40 PM
#418
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From: NW Michigan
Joe i just looked at the difference in 502 and 540 which is apprx 8%. Looking at the specs of solid cam in 502 build that was posted and added the 8% into cam numbers. For chits and grins to see what it software/program would show. Just throwing 8% more cam at than the 502.
Last edited by getrdunn; 09-22-2016 at 04:09 PM.
09-22-2016 | 03:56 PM
#419
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From: yorkville,il
crane 139651 244/[email protected] .632 lift.just information,nothing more nothing less.edit in 114 lsa
Last edited by mike tkach; 09-22-2016 at 04:06 PM.
09-22-2016 | 04:20 PM
#420
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From: yorkville,il
or 5 lbs boost and then your troubles will begin,drives,transmissions crapping every weekend.pick your poison tim!
