112 vs 114 centerline
02-08-2006, 08:02 PM
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112 vs 114 centerline
im fixin to buy a cam for my truck and was talking to a guy from thunder racing and he recommended a 114 centerline but i want a choppy idle. he said a 112 might have problems when coming to stops keeping to truck running. what if yalls experience with this??
02-08-2006, 08:08 PM
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he's right about the 112 stalling at stops. the only way you can fix that is to have the tune perfectly tweaked out. i have a mail order tune and sometimes i have suges at stops.
02-08-2006, 09:26 PM
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Just a FYI...
The 'centerline' is not the lobe seperation angle, which you seem to be referring to. There is a exhaust, and intake centerline. These are at peak lift of the exhaust lobe, and peak lift of the intake lobe.
The lobe seperation angle (LSA) is the seperation between the lobes. Tighten this and you increase overlap. Spread it and overlap decreases.
Also, a camshaft with a 114 degree spread and with 4* of advance puts the ICL @ 110 degrees and the ECL at 118*. So, your exhaust events have moved to a later position relative to the pistons position and the intake events are taking place earlier.
The 'centerline' is not the lobe seperation angle, which you seem to be referring to. There is a exhaust, and intake centerline. These are at peak lift of the exhaust lobe, and peak lift of the intake lobe.
The lobe seperation angle (LSA) is the seperation between the lobes. Tighten this and you increase overlap. Spread it and overlap decreases.
Also, a camshaft with a 114 degree spread and with 4* of advance puts the ICL @ 110 degrees and the ECL at 118*. So, your exhaust events have moved to a later position relative to the pistons position and the intake events are taking place earlier.
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02-09-2006, 05:10 AM
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depends on the duration, I have a 206/210 with a 112 lsa & i love it, its only a little choppy at idle but i have no problems & i dont even have a tune for it yet.
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