Kesh's 77tsi Build Thread / Worklog

[Lucas_R]

I have been looking into water/meth injection for sometime. Just trying to work out a more cost effective method at this stage. What puzzles me is that the intake temps are still quite high when cruising. One would think that the air flow through the heat exchanger will cool things down a bit.

I'm also unsure as to whether the iat is pre cooler or post cooler as there are two sensors. I believe it's pre cooler because the temps are quite high, but as said above, even at cruising when I'm on boost, it's at almost 50 degrees. Could be by design.

Regarding boost, I have seen that graph before and I've been puzzled myself. I'm using torque to log my boost pressures and I'm seeing 15.6psi peak at around 1900RPM. My tuner also ran some quick calculations based on the maps in the tune which produced numbers around 17psi.

Had a peek around forums as well and the general consensus is that these cars run just under 1bar of boost stock. So I'm actually not quite about what's going on with that graph, my peak boost is definitely before 2000 as well.

The IAT on my Mk6 GTI (and my old Golf R) was on the inlet manifold just after the throttle body - therefore post intercooler. Not sure what the setup is on the 1.2T

Some discussion here about boost pressure. The Briskoda link seems to confirm your theory of 16PSI.

77tsi turbo

https://www.briskoda.net/forums/topi...rom-the-12tsi/

[Kesh]

The IAT on my Mk6 GTI (and my old Golf R) was on the inlet manifold just after the throttle body - therefore post intercooler. Not sure what the setup is on the 1.2T

Some discussion here about boost pressure. The Briskoda link seems to confirm your theory of 16PSI.

77tsi turbo

https://www.briskoda.net/forums/topi...rom-the-12tsi/

Yeah that's one of the threads I read as well. Might ask john what his graph is suggesting.

The IAT sensor is built into the map sensor on the 1.2 at least, and there's two of them, pre and post. I guess the definitive way to test is to unplug one of them.