effect of leak in intake manifold

[Ulysse]

What would be the effect on CHT and EGT of a leak in the intake manifold of a single cylinder in a turbocharged engine?

[RoundTwo]

1 hour ago, Ulysse said:

What would be the effect on CHT and EGT of a leak in the intake manifold of a single cylinder in a turbocharged engine?

Lower.

[N201MKTurbo]

Depending on how big a leak you are talking about. A small leak will just get you a lower critical altitude. A big leak will make your plane a NA engine, possibly with jacked up mixtures. 
 

Once on my injected M20F, one of the intake risers fell clean off. The mixture was behaving weirdly, but the engine ran fine.

[exM20K]

It depends….  I just went through this.

If it’s the intake plumbing on one cylinder, that cylinder will be richer than the others at altitude and with a > ambient MP. I don’t remember what the TSIO360 intake looks like, but in the TSIO550, all the tubes are fed by the single throttle body, so unless the leak is right at the cylinder, they SHOULD all see the same MAP.

If it’s the upper deck pressure line to the injector, (my issue) it will run lean.

If you have an engine monitor that records data, do some slow mixture sweeps with high MAP.  It should be obvious what is going on.  Pressurizing the intake with CLEAN shop vac output and spraying some soapy water is pretty easy, too.

-dan