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Super Moderator
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Discussion Starter #1
Intake Centerline

"If you divide duration in half and subtract the intake opening point (IO), you will come up with the intake centerline. For example, a 268 cam divided by 2 equals 134 minus 28 degrees (IO) equals an intake centerline of 106 degrees. This refers to the centerline of the No. 1 intake lobe and its position in the engine compared to the No. 1 piston at top dead center (TDC). This measurement is expressed in crankshaft degrees after top dead center (ATDC). Some cam companies like Comp Cams use this figure to establish the proper position of the camshaft in the engine. For example, an Xtreme Energy 262 cam should be installed with and intake centerline of 106 degrees ATDC. If you were to degree an engine with this cam and find it installed at 104 degrees ATDC, then the cam would be intalled 2 degrees advanced. Conversely, at 108 degrees ATDC, the cam would be 2 degrees retarded from the 106 figure. There is also an exhaust-lobe centerline figure as well. If you advance the cam, this changes all four of the intake and exhaust opening and closing points."( http://ctfba.tripod.com/main/technical/cams/cambasics/cambasics.htm )

things to read
http://members.uia.net/pkelley2/Overlap.html

http://www.newcovenant.com/speedcrafter/tech/camshaft/3.htm

http://www.newcovenant.com/speedcrafter/tech/camshaft/4.htm

http://etcracingprograms.com/Downloads/cam%20degree%20worksheet%20web.pdf




http://www.trishieldperf.com/cam_dyno_tests.htm
 

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Super Moderator
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Discussion Starter #3

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DC Crew
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1,470 Posts
:huh:

Let me translate for people like me..

Slam on the gas = go fast.

Too slow? = More gas.
 

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Super Moderator
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Discussion Starter #5 (Edited)
 

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DC Crew
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grumpyvette said:
ok basics , you want basic,

the tighter the LSA ......................................the wider the LSA
the rougher the idle....................................the smoother the idle
the faster the torque curve builds..............the slower the torque ........................................................builds but the wider ..........................................................the tq curve
the narrower the peak rpm
http://www.chevytalk.org/threads/showflat.php?Cat=&Board=UBB64&Number=239801&Forum=UBB64&Words=LSA&Match=Entire%20Phrase&Searchpage=2&Limit=25&Old=1year&Main=239797&Search=true#Post239801

http://www.mercurycapri.com/technical/engine/cam/lca.html</A><BR>




things to read

http://www.grudgeracing.com/cams.htm

http://www.newcovenant.com/speedcrafter/tech/camshaft/1.htm

http://www.chevyhiperformance.com/techarticles/95298/

http://www.symuli.com/vw/camp1.html

http://www.symuli.com/vw/camp2.html

Ah. I get it. :)
 
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