Tial 50 mm BOV = 3 sec lag ???

[sorens2]

I´ve bought a Tial 50 mm BOV. Very hardcore in look and function but the turbolag after installing it is massive. Between gears I can almost put my seatbelt on. It´s mounted right after the turbo with a 8 mm hose directly up to the intake. Running 1.6 bar of boost. Tried different springs.
Isn´t it suppose to give less lag when I mount a larger (more efficient) BOV ?
I user to have a Bailey. Was ok.

Søren S2

[Mark Halligan]

I´ve bought a Tial 50 mm BOV. Very hardcore in look and function but the turbolag after installing it is massive. Between gears I can almost put my seatbelt on. It´s mounted right after the turbo with a 8 mm hose directly up to the intake. Running 1.6 bar of boost. Tried different springs.
Isn´t it suppose to give less lag when I mount a larger (more efficient) BOV ?
I user to have a Bailey. Was ok.

Søren S2

Cr@p I was going to get one of these .

Is it working slowly - do you hear the boost being dumped immediately you lift off of the throttle, or is there a delay? - Maybe something to do with that large 8mm bore signal line that it uses? Perhaps going down to a 4mm ID hose will give a 'crisper' vacuum signal??

Mark.

[sorens2]

No way. Not going down. Then it is very slow. Said also by Tial. As soon as I come of the trottle it phefffss. As it should. But going on the gas even at 5800 rpm it takes forever to make just 1 bar.

Søren S2

[quattroTurbo]

It's possible that the valve is too big - dumping ALL the boost. Also, is the valve closing quickly? Adjust the spring tension if it is taking its time closing.

[S2central.net]

Hmmmm - yeah - why a 50mm BOV ?

Possibly required for monster turbo installations - for those that like to blow off (psshhh) - versus those that like to recirculate.

I think the recirculating valve is better with standard pipework as it allows the turbine to keep spinning between gear changes when that puff of pressurised air is allowed to recirculate.

A blow-off valve by definition, dumps the remaining pressurised air to atmosphere. This is pressurised air that the engine worked hard to generate, so why waste all of it - its not like that silly psssssssshhhhhhhhhhtttttt noise is going to impress anyone !

Just my tuppence worth !!!


Paul

[Hacke]

try mutch mutch stronger spring,or use dubble

[sorens2]

But it doesn´t leak. Why should I use a stronger spring. Then it doesn´t open at all.
I haven´t got standard pipework. MAF is on pressure side.
And I like the phefffff...sound. So do others.
Even if you use a recirk. type the turbo looses all that power that it has just generated...

Søren S2

[Hacke]

forget that i wrote... I thaugt that it was about wastegate...