Hi everyone,

Just been watching some clips on YouTube and I was wondering what are the benefits of installing a Blow Off Valve on the TDI engine and it's overall effect?

Cheers

Waste of money, if you want a petrol sound buy a petrol car, all your doing is wasting boost pressure for a farting noise.

More importantly, they do not have any effect on a TDI. As they do not need them.

I fitted one and lost power. Sold it on ebay not long after.

The TDI doesn't need a BOV/Dump Valve as they have VNT turbos.

Also there isn't really the same amount of pressure to drop so you won't get the same noise anyway.

There is no advantage and as stated probably a disadvantage to fitting one to a derv.

WASTE OF TIME AND ROBS SOME POWER.

If you want the noise, eat a tin of beans instead!!

As normally implemented, it makes a fart/whoosh noise that astonishes unsuspecting pedestrians. On most modern turbo cars they're deprecated as they don't work very well with MAF based engine management systems.

On a diesel engine, the application of a BOV may be questionable, given there's no throttle plate to snap shut and no massive flow reversions in the inlet tract to suddenly

A BOV or recirculating BOV can be fitted as part of a boost/spike management strategy or as an engine/turbo saver. If boost air is dumped from the inlet manifold, it doesn't contribute to exhaust flow and therefore doesn't contribute to possible turbo overspeed situations.

J.

As normally implemented, it makes a fart/whoosh noise that astonishes unsuspecting pedestrians. On most modern turbo cars they're deprecated as they don't work very well with MAF based engine management systems.

On a diesel engine, the application of a BOV may be questionable, given there's no throttle plate to snap shut and no massive flow reversions in the inlet tract to suddenly

A BOV or recirculating BOV can be fitted as part of a boost/spike management strategy or as an engine/turbo saver. If boost air is dumped from the inlet manifold, it doesn't contribute to exhaust flow and therefore doesn't contribute to possible turbo overspeed situations.

J.

but on TDIs, because there is no throttle butterfly to close when you let off the throttle, there is no excess buildup of pressure, nor is there negative pressure (the reason for uprated turbo hoses on petrol cars) so the TDI dumpvalve has to be electronically controlled.. ie a solenoid opens the valve when you let off the throttle.. so yes, you just loose pressure for no reason, and more than likely spray oil all over your engine bay at the same time

WASTE OF TIME AND ROBS SOME POWER.

If you want the noise, eat a tin of beans instead!!

Buttttttt, I thought that fitting a BOV was essential to allow the fitting of a whistle -

but on TDIs, because there is no throttle butterfly to close when you let off the throttle, there is no excess buildup of pressure, nor is there negative pressure (the reason for uprated turbo hoses on petrol cars) so the TDI dumpvalve has to be electronically controlled.. ie a solenoid opens the valve when you let off the throttle.. so yes, you just loose pressure for no reason, and more than likely spray oil all over your engine bay at the same time

BOV as a rust control strategy