Do your Coolant temps and AIT's a favor

[vex]

Originally Posted by RETed

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Oh, if you want to drop your temps and increase spool up on your turbo, might I suggest a turbo (turbine) blanket?
These have been used for years and have been proven (and produce more significant results over these posted in this thread).
Oh, wait, but you already knew about that, right...?

Hey, sorry for raining on your parade.
I'll let you get back to your normal scheduled programming, and excuse the blip on your TV screen.


-Ted

Can I imagine you laughing while typing that?

The same principle still applies with the turbo blanket. The turbo will only spool as fast as the temp/pressure differential is available (Which I know you know but for everyone elses benefit), so the more heat you keep within the turbine the faster it will spool. Of consequence plugging the hole will give more exhaust gas temperature to the turbine than a blanket alone. This modification would be to isolate the exhaust gases from exchanging heat through contact and heat soak directly to the coolant passages. I imagine one could theoretically further increase the heat rejection benefit of the coolant passages by filling the egr void and plug area with an insulator material (silca comes to mind as an example) and then blocking off the locations themselves. Though I'm personally not familiar with the passages and so can not say it would be a good thing or not and may be more of a hassle than is really worth.

More to the point blocking off these passages may at the most provide a good 50-100F (I pulled these numbers out my ass though) temperature difference which to a turbo isn't a whole lot and wouldn't really be noticable when the EGT's reached normal operating temperature. Basically it's something that, by itself, is not worth it to pull your engine and take apart to do.

You could however decrease spool time by increasing the temp/pressure differential. There's (more than) two ways to do this. One is to allow a majority of the exhaust gas to go directly to the turbine, or cool down the exhaust gases as quickly as possible after the turbo. One can let their imagination run from there I figure.