LSA...what does it mean for power and idle?

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Jan 17, 2008 | 05:31 PM

#41

02T/A-WS6

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Quote:

Originally Posted by bad6as

a cam lope is based off overlap, you add the two durrations togeather, devide by 2 then subtract the lsa twice. example 228/228 112 228+228=456 then take 456/2 = 228 then take 228 and subtract 112 you get 116 then take 116 subrtact 112 and you get your overlap of 4* the higher the overlap the more lope. that same cam on a 114 would have 0* overlap. keep in mind the stock cam and some others have negitive overlap.
take the 2 same cams one on a 110 and the other on a 114
the 110 will have more overlap, get in to power sooner, and then start to fall off sooner
the 114 wil idle better have a smoother bigger powerband (higher up in the rpm range)

ok that makes sense so what about advance in timing like a 4 degree advance what would that do to a 228/228 112lsa cam?

Jan 17, 2008 | 05:34 PM

#42

bad6as

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advance ground in to a cam like a 110+2 or 112+4 would take the powerband and move it sooner. example.
228/228 110 powerband 3200-5700
228/228 110+4 powerband 2800-5500
228/228 114+0 powerband 3600-6400
that just gives u an idea thoes powerbands arnt right

Jan 17, 2008 | 05:42 PM

#43

02T/A-WS6

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right so the cam im lookin a TSP 228R 112 and the power band on the is like 1600-6300 and being that i dont really give it more than like 5500 99% of the time. So i would want to either have it advanced the 4 degrees or have it ground into the cam to bring it down a **** hair for my driving habits

thanks again for the help

Jan 17, 2008 | 05:46 PM

#44

bad6as

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+4 would kill the top end a good bit, some tsp cams have some advance pre ground in.
they show the lsa choices but dont say if there is any advance.
the torquer v2 has 2* ground in

Jan 17, 2008 | 06:15 PM

#45

Jeff M

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So ground advance doesn't effect the idle, in other words it doesn't make a 112+2 lope harder than a 112? It just alters the peak power position?

Jan 18, 2008 | 02:49 AM

#46

LSGunZ28

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Quote:

Originally Posted by Tainted

im runing a 228R cam on a 112lsa and i could not be happier. The lower the LSA the lower its peak power will be at. say 112 peaks at 6200 while a 114 peaks at 6400 but power comes in later

No man, this is wrong. I dunno wh everyone on LS1tech thinks this, but this is wrong. wtf?!