Do Blow Off Valves Effect Fuel Consumption??
07 November 2002, 07:01 PM
#1
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Do they or dont they effect it, had this conversation with a friend of mine and they only way we think that it would effect it would be because your changing gear that often to hear the whoosh, hence the fuel consuption.....
Any other opinions?
Any other opinions?
07 November 2002, 07:06 PM
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You and your friend are absolutely correct!
Speaking for myself, I tend to take the revs up that little bit further for a louder dump, especially if there are frail old ladies at the bus stop
Paul
Speaking for myself, I tend to take the revs up that little bit further for a louder dump, especially if there are frail old ladies at the bus stop
Paul
07 November 2002, 08:06 PM
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Ha! About 0.000000001%! And that's not being childish...
You could equally claim that the VTA raises engine efficiency through not re-routing oil (as the recirc ones do) as oil reduces the effective RON rating of the fuel, therefore retarding ignition,reducing efficiency therefore wasting fuel.
You could equally claim that the VTA raises engine efficiency through not re-routing oil (as the recirc ones do) as oil reduces the effective RON rating of the fuel, therefore retarding ignition,reducing efficiency therefore wasting fuel.
07 November 2002, 10:21 PM
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Last couple of weeks i have being averaging around 19.8mpg before this i was getting around 21-22mpg.I have taken off v.t.a bov and re-fitted my standard one to see what happens over the next few weeks.
07 November 2002, 11:31 PM
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What'll happen will be you'll drive differently. Whether you mean to or not 
How much time do you spend changing gear? 5% of the time (what your figure above would suggest)?
Um, no.
The car sounds better when driven hard with a VTA, so we all drive harder
So, I suppose yes, VTA does increase fuel consumption, but not itself - just because you are more likely to drive aggressively.
Does that help?
How much time do you spend changing gear? 5% of the time (what your figure above would suggest)?
Um, no.
The car sounds better when driven hard with a VTA, so we all drive harder
So, I suppose yes, VTA does increase fuel consumption, but not itself - just because you are more likely to drive aggressively.
Does that help?
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08 November 2002, 02:48 PM
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"They" don't make any difference - whether the car becomes less economical or not is up to you. Wear earplugs & you'll get the same 'economy' (
) as before, listen & play with the new noise & you'll use more fuel
) as before, listen & play with the new noise & you'll use more fuel
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