Dump Valves
10 April 2004, 09:44 PM
#31
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Back to the original question - As Greasemonkey has said - most of the car noises where taken from other cars on The Fast and the Furious, IIRC the black Civics where actually making noises from a turbo charged Integra etc...
10 April 2004, 09:50 PM
#32
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Originally Posted by Johnny sti
Hi mate?
You dont happen to have a non atmos dump vale aswell do you that i can add to my list from you?
I have a baileys atmos but what GM says, i think i will change!
You dont happen to have a non atmos dump vale aswell do you that i can add to my list from you?
I have a baileys atmos but what GM says, i think i will change!
Will check and let you know on tuesday.
Bloody hell!
thats very worrying.
I wonder if GMs comments will have an effect on sales of aftermarket blow up valves.
10 April 2004, 09:50 PM
#33
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Originally Posted by greasemonkey
The question you've asked has already been answered earlier in this thread dij, do you not have your reading glasses on? I'm not spelling it out all over again.
Look at the comments regarding rich running and bore wash (as a result of using a VTA valve) and possible turbo damage (as a result of using a valve that doesn't open when it otherwise should).
Pete: No, it's not possible to map properly around a VTA dumpvalve because, as mentioned above, venting air screws up the airflow measurements. If you can't measure the error, you can't (accurately) map around it.
The correct way round this "problem" is to use a MAP based ECU like a MoTeC, GEMS, Link etc. Then it doesn't matter whether the dumpvalve recirculates or not, as the fuelling calculations are based on manifold pressure rather than mass airflow measured at the pre-turbo end of the inlet tract.
Look at the comments regarding rich running and bore wash (as a result of using a VTA valve) and possible turbo damage (as a result of using a valve that doesn't open when it otherwise should).
Pete: No, it's not possible to map properly around a VTA dumpvalve because, as mentioned above, venting air screws up the airflow measurements. If you can't measure the error, you can't (accurately) map around it.
The correct way round this "problem" is to use a MAP based ECU like a MoTeC, GEMS, Link etc. Then it doesn't matter whether the dumpvalve recirculates or not, as the fuelling calculations are based on manifold pressure rather than mass airflow measured at the pre-turbo end of the inlet tract.
Thanks Greasemonkey..... Very informative
11 April 2004, 12:35 AM
#34
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got mine with turbosmart dual port (recirculate, VTA or both) bov already fitted on .. all adjustable and stuff .. always wondered tho' if it was worth all the noise?? don't think it is really .just seems to be another area in which to think "ooh wonder if that's set up right"
think ill put the standard one back on (also came with puchase)
very informative reading greasemonkey and others
thx
terry
think ill put the standard one back on (also came with puchase)
very informative reading greasemonkey and others
thx
terry
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