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**jarrus464** · 01-06-2008, 04:49 PM

varible vane turbos would be too expensive to produce in mass produced petrol engines
ok agruably the new 997 911 turbo could be called a mass produced car but it's an expensive and high performance sports car. they won't use them in cars like an Astra VXR or a Focus ST then the price of the car would have to be more..and when you buy a car like that your likly to spank it's balls anyways in the turbo rev range

this is because they have to be made out of more heat resistant meterials because of higher exhaust gas temps. (higher than diesels)

plus standard turbos take a little longer to spool up in diesels, my TD has has a non variable vane turbo and it's not on full boost till 3000k and i'll problebly change between
4-4.5k plus it's aids in the low end (before 2k) becasue older diesels with no tuning tend to be quite flat and then you get and almighty surge which can't be good for fuel economy ethier...

so with a variable vane turbo you can get some form of useable power right from 1500 rpm in new diesels so you change earlier and improve fuel ecomonmy plus you get better off the line "grunt"

01-06-2008, 04:49 PM	#6 (permalink)
jarrus464 Member Tuner Car: Peugeot 306 1.9 DT Join Date: Mar 2008 Posts: 98	Re: Varible vane Turbo varible vane turbos would be too expensive to produce in mass produced petrol engines ok agruably the new 997 911 turbo could be called a mass produced car but it's an expensive and high performance sports car. they won't use them in cars like an Astra VXR or a Focus ST then the price of the car would have to be more..and when you buy a car like that your likly to spank it's balls anyways in the turbo rev range this is because they have to be made out of more heat resistant meterials because of higher exhaust gas temps. (higher than diesels) plus standard turbos take a little longer to spool up in diesels, my TD has has a non variable vane turbo and it's not on full boost till 3000k and i'll problebly change between 4-4.5k plus it's aids in the low end (before 2k) becasue older diesels with no tuning tend to be quite flat and then you get and almighty surge which can't be good for fuel economy ethier... so with a variable vane turbo you can get some form of useable power right from 1500 rpm in new diesels so you change earlier and improve fuel ecomonmy plus you get better off the line "grunt"