Removing D/V
- Thread starter richybigman
- Start date
all i can add to this is my recirc pipe came of my dv the other day and got that great sounding chattery noise!!performance was what can only be described as poo tho!!!!
Very NOT recommended to run with no DV - you WILL destroy your turbo in a very short time, and possibly more when it does let go!
So how come most Evo specialists say to run them without d/v's, even on a standard Evo?
Don't get me wrong i know my car isn't an Evo but there can't be that much difference in the way the turbo works.
Don't get me wrong i know my car isn't an Evo but there can't be that much difference in the way the turbo works.
Why can't I run without wheels, those guys with aeroplanes seem to manage it most of the time........
The boys in the scc do not run a dv as it is not allowed.
but obviously this does have its reprocutions as like robdon says it will destry your turbo in no time and also result in the turbo stailing not sure how the racing team get around that bit though.
but obviously this does have its reprocutions as like robdon says it will destry your turbo in no time and also result in the turbo stailing not sure how the racing team get around that bit though.
Why can't I run without wheels, those guys with aeroplanes seem to manage it most of the time........
Slight difference between a plane and a car than a car and a car! The way i see it is that the turbo is doing the same job in both cars so why would it be so much worse in mine?
I'm just looking for an explanation.
I think thats a fair point, what is the diff?
as i said, i know it isn't good, thats why my DV is back on!
as i said, i know it isn't good, thats why my DV is back on!
I'm not trying to start a debate or anything i just want to know why you can run some turbo's without a d/v but some have to have a d/v.
Surely you would feel if you had turbo stall? The way i see it is that it's the turbo stall which causes the problem so if you don't get it the car should be fine.
Surely you would feel if you had turbo stall? The way i see it is that it's the turbo stall which causes the problem so if you don't get it the car should be fine.
Anything running a turbocharger MUST have some sort of excess pressure release, or it is forced back through the turbo (hence the chattering noise) which puts immense strain on the blades, bearings, seals, etc. Race cars get away with it because they have the budget to change turbos after every race!
Most EVO tuners do NOT remove DV's on street cars, first time I've heard that one - lol! I have a large collection of EVO engine bay pics (for inspiration!) and not one has the DV removed, even the AMS drag EVO runs a big Tial BOV!
Most EVO tuners do NOT remove DV's on street cars, first time I've heard that one - lol! I have a large collection of EVO engine bay pics (for inspiration!) and not one has the DV removed, even the AMS drag EVO runs a big Tial BOV!
I regulaly go to Evo meets with my brother and a mate and they say not to run with d/v's. Even cars that Norris Designs modify say to run with no d/v.
Surely the pressure goes through the wastegate to release?
Surely the pressure goes through the wastegate to release?
All I can say is 99% of all tuned EVO's I've ever seen all have a DV or BOV fitted. Maybe this is why so many EVO's and Scoobys blow their engines with alarming regularity ... by doing dumb things like running with no DV or BOV.
I mean if the likes of AMS, RC Developments, etc. all use BOV's then it has to be for a reason. Andrew Gallacher's fire-breathing 650bhp Focus Cosworth race car runs a Bailey DV30!!!
http://www.b7srl.com/Andrew/FocusMkIIimages/images/engine_fitted.jpg
I mean if the likes of AMS, RC Developments, etc. all use BOV's then it has to be for a reason. Andrew Gallacher's fire-breathing 650bhp Focus Cosworth race car runs a Bailey DV30!!!
http://www.b7srl.com/Andrew/FocusMkIIimages/images/engine_fitted.jpg
It can't if the wastegate is closed.
The moment you back off on the throttle from a full boost situation, the car would normally dump (or recirculate) relieving the pressure in the intake system.
Without the pressure relief, you've still got the exhaust turbine running hard, driving the compressor hard. Air is effectively backed up on the compressor side, going nowhere for a short while. The compressor blades are chopping through that air, putting great strain on them, shaft and bearings........
As far as i know on the Evo's the wastegate deals with the pressure which is why they get wastegate chatter.
Please don't think i'm being argumentative
Please don't think i'm being argumentative
anyone who is not a mechanical expert and wants more info on how turbos work see here for a good read:
http://en.wikipedia.org/wiki/Turbocharger
http://en.wikipedia.org/wiki/Turbocharger
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