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Author Dilemma
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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26th Sep 06 at 11:38   View Garage View User's Profile U2U Member Reply With Quote
Righty ho.

I have two N75 valves, one is brand new the other i am assuming came on the car from new.

the N75 controls the wastegate which allows the ECU to control how much boost is being made.

HOWEVER when using the original N75 valve i get a fluctuation of boost when i put it in a high gear and floor it, basically putting the engine under load.

If i put the new N75 on i do not get the boost fluctuation.

My problem,

With the old N75 i get a nice kick when the turbo spools up and does seem to pull stronger lower down the rev range,

With the new one it doesnt seem to pull so well lower down but does seem to pull a bit better higher up the rev range, more like a n/a car.

what do you think i should keep on there? i would stay with the old one but the flucatation can sometimes get annoying
Robin
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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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26th Sep 06 at 11:40   View Garage View User's Profile U2U Member Reply With Quote
the working one.

boost fluctuation is not only annoying, it'll be damaging your engine with the random overfueling when its not boosting properly.
Jenko_Sport
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Registered: 25th May 06
Location: Stoke-on-Trent
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26th Sep 06 at 11:41   View User's Profile U2U Member Reply With Quote
As stupid as it sounds, try another vavle, how much are they to buy?
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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26th Sep 06 at 11:41   View Garage View User's Profile U2U Member Reply With Quote
why does it pull better or is it my imagination
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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26th Sep 06 at 11:41   View Garage View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Jenko_Sport
As stupid as it sounds, try another vavle, how much are they to buy?


45GBP or thereabouts, my try a different type off an audi
Edd
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Registered: 8th Nov 04
Location: Glasgow
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26th Sep 06 at 11:44   View User's Profile U2U Member Reply With Quote
anything that puts your car under undue load should be fixed

IE change it
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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26th Sep 06 at 11:44   View Garage View User's Profile U2U Member Reply With Quote
Internet Explorer?
Edd
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Registered: 8th Nov 04
Location: Glasgow
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26th Sep 06 at 11:45   View User's Profile U2U Member Reply With Quote
inmy experience
Marc
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Registered: 11th Aug 02
Location: York
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26th Sep 06 at 11:45   View User's Profile U2U Member Reply With Quote
Have you asked on http://www.VAGweb.co.uk?

Personally I'd want one that did both.
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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26th Sep 06 at 11:47   View Garage View User's Profile U2U Member Reply With Quote
yes i want that too marc
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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26th Sep 06 at 11:49   View Garage View User's Profile U2U Member Reply With Quote
marc read the N75 tutorial

http://www.vagweb.co.uk/forums/viewtopic.php?t=269&highlight=n75
Marc
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Registered: 11th Aug 02
Location: York
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26th Sep 06 at 11:52   View User's Profile U2U Member Reply With Quote
I have
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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26th Sep 06 at 11:52   View Garage View User's Profile U2U Member Reply With Quote
did it make you wet seeing my dirty fingers?
Marc
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Registered: 11th Aug 02
Location: York
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26th Sep 06 at 11:53   View User's Profile U2U Member Reply With Quote
It did actually. Someone should do a similar one on Scoobynet for such things.
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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26th Sep 06 at 11:55   View Garage View User's Profile U2U Member Reply With Quote
read the other tutorials, they are genius
Marc
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Location: York
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26th Sep 06 at 11:56   View User's Profile U2U Member Reply With Quote
Maybe later
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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26th Sep 06 at 13:04   View Garage View User's Profile U2U Member Reply With Quote
ttt
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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26th Sep 06 at 13:32   View User's Profile U2U Member Reply With Quote
fit both
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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26th Sep 06 at 13:33   View Garage View User's Profile U2U Member Reply With Quote
i wish i could
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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26th Sep 06 at 13:33   View User's Profile U2U Member Reply With Quote
but in all honesty, it should drive like how the 2nd makes it feel. Use that one.
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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26th Sep 06 at 13:57   View Garage View User's Profile U2U Member Reply With Quote
its going to powerstation next week for two runs to compare both valves

 
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