G13BT

Is there any problem, adapting an external wastegate on a turbodiesel engine?

I know temperature is not a problem, dieselīs have lower egtīs... but diesel engines produce alot of particles,would that be a problem for the valve itself?
Also alot of air goes trough them, would a 36mm wastegate be enough for a 2.0 liter diesel pumping 1,5 bar boost on a hybrid turbo?

I know you guys are masters, youīve helped alot a few years ago, so be kind to the newb...

t_cel_t

wastegate on a diesel? just run that ---- strait, just get bigger injectors.

jmhalder

a smaller wastegate would probably be just fine, as your probably getting a little inefficient at 1.5b-bar, the stock internal gate on my HY-35 wasnt all that big, and the actuator was supposed to open at something like 23psi IIRC.
36-38mm would be fine. but i agree, you dont need a wastegate

con

my diesel has no wastegate

BigBird

Lol we wired the gate shut on dvst8r's D250 and with the free fuel mods the hx35 hits 50psi. Stock hg don't love that.

E-b0la

The John Deere tractor I use to mow with doesn't have a wastegate.

Unregulated boost FTW!

d-man

My TDI golf doesn't have a waste gate.


Keep that mah shut and upgrade injectors.

G13BT

So what would exactly limit the boost? RPMīs? Exhaust/intake restricitons restriction?

That would be insane, itīs not intercooled(yet), wouldnīt the turbo be spining much faster? Heating up the air and oil?

Your Vw tdi doesnīt have a wastegate? youīre kidding right? In europe all tdiīs have internal wastegates, or are VNT type... but they all have a electronic controlled type of mecanical actuator... either vacum or pressure actuated...

E-b0la

Does it really matter if the intake air is hotter? Your not trying to prevent detonation with a diesel, detonation is what makes diesels work.

You want to watch your EGTs with a diesel. The richer you run it, the hotter they get.

G13BT

It does matter, because the colder the air the denser it is, so the turbo would be working twice the efort to pump the same amount of hot air...

If your theory applyīs why almost every modern diesel is intercooled, and if you simply apply one to a non intercooled you get huge bhp gains?

There are 2 versions of the engine in my car, a non intercooled with 90bhp, and 205nm and a intercooled version with 110bhp and 255nm... The only diference is the intercooler, the engine is exactly the same with diferent ECU map...