OM606 individual inlet manifold?

[rodion]

Hello,

I want to install water-intercooler form M275 next to injection pump.
That's why I think about a custom small inlet manifold, because I have not enough space in W463 enginebay.

I wonder if the long inlet tubes of 606 are important for torque of a turboed engine?
What do you think of a inlet manifold with short inlet tubes?


regards Rod

[rumilus]

Forget it.
No significant benefit.

Unohtaisin vesijäähdytyksen kokonaan, koska mitätätön vaikutus.
Ahtoilmacoolerilla saavutetaan parempi hyöty.

[veskola]

There you can see water/air cooler used in OM606:

http://www.mersuforum.net/forum/viewtop ... 34#p644234" onclick="window.open(this.href);return false;

There is one bad issue, the water inside cooler is going to heat because the engine is warm and the cooler is connected to the engine through inlet manifold which conducts heat quite well, especially this happens while the car is not moving, a kind of thermical isolation is needed (silicone tubes or kind). With this setup of inlet manifold they were able to get low 10 second E.T times on queter mile and speed >208 Km/h las summer, so i would like to say it woks quite well.

Short runners of inlet manifold is bad issue in turbo engines, try to avoid that. The lenght of original 606 is quite good compromise. water/air cooler can obsiously be placed anywhere, longer tubes for boosted air are not anykind of problem.

[rodion]

thank you!

@rumilus:
I do not want any benefit, I want more space in enginebay


@veskola:
I have M275 Intercooler and I want to connect it via silicon hose to inlet manifold.





Short runners are bad for torque at low rpm?
What do you think - is it a big disadvantage?

First of all I want to achieve 180hp on OM606 with 5,5mm IP and OM606 turbocharger.

regards Rod

[veskola]

First of all I want to achieve 180hp on OM606 with 5,5mm IP and OM606 turbocharger.

I think it is not so important if there is not required more power than 180hp.

In terms of intake manifold runner length, a longer intake runner produces better power at high RPM, while a shorter intake runner produces better power at low PRM. Generally, an intake manifold runner that is in the region of 300-400 mm long will sustain power at high RPM but little power at low RPM while an intake manifold runner that is in the region of 200-300 mm long will start building power from low RPM but will run out of power soon after peak power is reached. But note that the intake port on the cylinder head forms part of the intake runner. Thus the intake runner length is measured from the intake valve seat to the intake runner bell mouth, and not from the end of the intake manifold.

...and becase that 180 hp is very easy to reach no matter if there is used shorted runners...anyhow use as long as possible.