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Old 04-02-2012, 11:04 PM   #1 (permalink)
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Question about DWL with vacuum gauge

I want to maximize my P&G efficiency by accelerating at around 70% load but I do not have a scangauge to tell me the %load. A vacuum gauge is another (cheaper) way of telling you engine load, so my question is how to convert a simple engine load reading over to the vacuum gauge. I know that when you accelerate vacuum goes to around 0. Is 0 vacuum 100% load? Should I be trying to accelerate at around 0 vacuum to maintain my target load or is it more complicated than that?

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Old 04-02-2012, 11:11 PM   #2 (permalink)
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Quote:
Originally Posted by cbaber View Post
I want to maximize my P&G efficiency by accelerating at around 70% load but I do not have a scangauge to tell me the %load. A vacuum gauge is another (cheaper) way of telling you engine load, so my question is how to convert a simple engine load reading over to the vacuum gauge. I know that when you accelerate vacuum goes to around 0. Is 0 vacuum 100% load? Should I be trying to accelerate at around 0 vacuum to maintain my target load or is it more complicated than that?
0 is 100% and if you would like to use 70% you should use 30% away from zero at least how I understand it.

Amount of throttle is perhaps irrelevant there, just make needle to be at target and adjust throttle so that it stays as it does change with rpm increase.
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Old 04-03-2012, 05:11 AM   #3 (permalink)
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Use 1.5 inches for 90%.
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Old 04-03-2012, 01:21 PM   #4 (permalink)
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Thanks for the responses guys. I guess a better way to ask my question would be whether or not vacuum is directly proportional to engine load. I will just have to learn the gauge as I drive to see exactly where i need to be.

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