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Hi guys,
I just wanted to ask if anybody knows how much difference in pressure when measured directly at the turbo vs. measured at the intake manifold is acceptable?
We habe a single turbo rb26 engine which should be making more power than it is currently making.
We have a diffeence of 35-40kpa when measured at the trbo vs at the manifold.
Could it be that the Intercooler causes too much backpressure?
There are a few things to unpack here.
35-40kpa difference only has relevance when the actual boost pressure is listed. 40kpa difference at 80kpa boost measured at the manifold is very different to 40kpa difference at 200kpa boost measured at the manifold.
You also need to consider how much temperature the intercooler is taking out of the charge air. In cooling the charge, the density is increasing, which will reduce the measured pressure.
If the intercooler is pulling 100+ Celcius out of the charge air, 40kpa is nothing to worry about.
