ko_racer
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| posted on 10/6/08 at 02:58 PM |
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Engine Question Re Vacuum
Bit of a theoretical question,
If you have for example a motorcycle engine that uses a fuel pressure regulator that has a take off from each of the throttle bodies (ie all
linked).
If you were to remove one of the vacuum lines from the link and block it off (or use it for something else) would this change the amount of vaccum the
pressure regulator sees?
I've been thinking about this and don't think it should make any difference to the vacuum but if it makes no difference why link all 4
together in the first place?
Resason for asking this question is that I was advised to do this, did it on both our cars and one killed a set of plugs after a lap and the other
detted the engine after 20 mins and killed it.
Both motors had been running fine before the changes and after changing the plugs in one and changing the pipes back to normal ran faultlessy all
day.
Just curious if this could be the cause and if the vacuum would change if one pipe was blanked.
Cheers
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BenB
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| posted on 10/6/08 at 03:03 PM |
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If the carbs are syncronized the vacuum is going to be approximately the same from all of them.... Therefore there's no difference if the fuel
pressure regulator is set relative to one or all of them....
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britishtrident
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| posted on 10/6/08 at 03:53 PM |
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The idea is it damps out pulsations which are a big problem.
If you need a vac connection you can just Tee it in to the vac feed to the pressure regulator.
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