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ddillenger
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« Reply #30 on: May 23, 2013, 02:11:42 PM »
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So is anyone worried about running the cam at max advance at high RPMs?
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britishturbo
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« Reply #31 on: May 23, 2013, 02:26:16 PM »
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So is anyone worried about running the cam at max advance at high RPMs?
No. unless you believe that crap Max says lol :-p But no unless your valves float of things expand a crap ton from heat the clearance is the clearance. |
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ddillenger
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« Reply #32 on: May 23, 2013, 02:36:22 PM »
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I understand that, but not everyone has a fully built top end Lee (fucker). As such, I'd be leary of running 7k+RPM at max advance. Just curious  |
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nyet
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« Reply #33 on: May 23, 2013, 04:57:09 PM »
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Lock the cam state at no advance
Tune KFZW
Lock at full advance
Tune KFZW2
Overlay load from both and it will be clear
Keep in mind as ST said that it takes a few hundred RPM to adjust
but since full advance is unsafe past a certain RPM, dont lock it past that? |
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britishturbo
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« Reply #34 on: May 23, 2013, 05:12:15 PM »
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I understand that, but not everyone has a fully built top end Lee (fucker). As such, I'd be leary of running 7k+RPM at max advance. Just curious Haha fair enough. I forget not everyone has an 8500 redline :-) |
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britishturbo
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« Reply #35 on: May 23, 2013, 05:12:56 PM »
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but since full advance is unsafe past a certain RPM, dont lock it past that?
Its perfectly safe unless you float a valve. |
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ddillenger
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« Reply #36 on: May 23, 2013, 05:22:47 PM »
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Its perfectly safe unless you float a valve.
I dunno. I wouldn't do it on a stock valvetrain, or at HIGH boost. Could float/blow a valve open. I'm with Nyet. |
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Bische
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« Reply #37 on: May 23, 2013, 11:19:50 PM »
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Are we mixing up advance and retard here?
+18* overlap angle or fnwue 0 = advanced position aka the normal state, linked with KFZW.
-4* overlap angle or fnwue 1 = retarded position, linked with KFZW2.
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nyet
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« Reply #38 on: May 23, 2013, 11:20:54 PM »
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err. yea. what he said.
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userpike
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« Reply #39 on: May 23, 2013, 11:42:51 PM »
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I dunno. I wouldn't do it on a stock valvetrain, or at HIGH boost. Could float/blow a valve open. I'm with Nyet.
speaking of floating valves..not really.. http://youtu.be/P3HwJDxgLUU I dunno if the valves are stock but they appear to be. the ones I bent looked like the ones in the vid. |
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phila_dot
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« Reply #40 on: May 24, 2013, 09:30:52 AM »
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Are we mixing up advance and retard here?
+18* overlap angle or fnwue 0 = advanced position aka the normal state, linked with KFZW.
-4* overlap angle or fnwue 1 = retarded position, linked with KFZW2.
Nope. fnwue == 0 == retarded KFNW output 0 clears B_nwsb, clears B_nws, and doesn't energize N205/208. When B_nws is clear, then fnwue = 0. Normal state is no overlap. |
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nyet
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« Reply #41 on: May 24, 2013, 09:41:48 AM »
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Huurgh. I think phila has it right.
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Bische
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« Reply #42 on: May 24, 2013, 09:45:30 AM »
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First you say fnwue 0 = retard, and then normal state is advanced?  I think we need to bone out what is an retarded vs. advanced cam operational angle. |
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britishturbo
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« Reply #43 on: May 24, 2013, 09:55:38 AM »
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First you say fnwue 0 = retard, and then normal state is advanced? I think we need to bone out what is an retarded vs. advanced cam operational angle. Phila said it just how it is. Normal state = No Advance = No Overlap = KFZW = 0 in KFNW Advanced State = Overlap = KFZW2 = 1 in KFNW |
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Bische
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« Reply #44 on: May 24, 2013, 10:09:43 AM »
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So timing a cam later in the cycle is advancing it? The opposite of ignition timing?
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