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The Terminator
Terminator Talk
I love my J&S Vampire!!!
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<blockquote data-quote="MalcolmV8" data-source="post: 11787096" data-attributes="member: 8854"><p>I believe the documentation says it pulls something like 1/2 a degree of timing each time that cylinder fires until the knock goes away so you're talking about 1 maybe 2 degrees timing pulled form a cylinder not 10 or 20. Assuming the tune was right at the edge as you suggested. Yes the vampire can pull 20 degrees across all cylinders but that's mostly for testing and troubleshooting so you can see the affects immediately. If it's doing that in normal driving you have something seriously wrong.</p><p></p><p>Also it has many output options in terms of bar graphs of LEDs that show how much timing is been pulled exactly and from which cylinders. I opted to just go with a single LED that shows me it's activating. I have this LED laying loosely on my dash now shortly to be installed in a nice hidden but very visible location such as the a/c vent. The idea is if you ever see this LED go off you need to stay out of it immediately and find the issue and correct whether it's meth, tune, plugs what ever.</p><p></p><p>I'm not sure what you mean by pushing beyond fuel or octane limits. If you have enough octane for what you're doing max power will come before knock. Power will tapper off from to much timing and eventually start knocking. If that's happening your tune is way off and needs to be redone.</p><p></p><p>If your compression level and or boost level can make more power than your fuel octane is capable of then yes you will add timing and at a certain point you hit a ceiling where you could be making more power with more timing but your octane is limiting you so you have to stop. So lets say you've just been running at 18 degrees timing to be safe. Now you get a vampire and lets say you decide to turn up the timing and you find you're hitting the limit at 23 degrees and you can tell because the vampire is activating. You then pull back a couple degrees and leave it at 21 which is safe and gives you room for error and you've picked up 3 degrees. I'm not seeing the problem here?</p></blockquote><p></p>
[QUOTE="MalcolmV8, post: 11787096, member: 8854"] I believe the documentation says it pulls something like 1/2 a degree of timing each time that cylinder fires until the knock goes away so you're talking about 1 maybe 2 degrees timing pulled form a cylinder not 10 or 20. Assuming the tune was right at the edge as you suggested. Yes the vampire can pull 20 degrees across all cylinders but that's mostly for testing and troubleshooting so you can see the affects immediately. If it's doing that in normal driving you have something seriously wrong. Also it has many output options in terms of bar graphs of LEDs that show how much timing is been pulled exactly and from which cylinders. I opted to just go with a single LED that shows me it's activating. I have this LED laying loosely on my dash now shortly to be installed in a nice hidden but very visible location such as the a/c vent. The idea is if you ever see this LED go off you need to stay out of it immediately and find the issue and correct whether it's meth, tune, plugs what ever. I'm not sure what you mean by pushing beyond fuel or octane limits. If you have enough octane for what you're doing max power will come before knock. Power will tapper off from to much timing and eventually start knocking. If that's happening your tune is way off and needs to be redone. If your compression level and or boost level can make more power than your fuel octane is capable of then yes you will add timing and at a certain point you hit a ceiling where you could be making more power with more timing but your octane is limiting you so you have to stop. So lets say you've just been running at 18 degrees timing to be safe. Now you get a vampire and lets say you decide to turn up the timing and you find you're hitting the limit at 23 degrees and you can tell because the vampire is activating. You then pull back a couple degrees and leave it at 21 which is safe and gives you room for error and you've picked up 3 degrees. I'm not seeing the problem here? [/QUOTE]
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