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Old 08-27-2008, 01:13 PM   #18 (permalink)
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Originally Posted by NeilBlanchard View Post
Hmmm, With direct fuel injection, then a turbo on a gasoline engine just compresses air.
Interesting observation. That's probably correct.

Originally Posted by NeilBlanchard View Post
Do turbo diesels use ever use an intercooler? (If the main purpose of increasing compression on a diesel is to heat things up...)
Absolutely. Intercoolers are frequently used downstream of diesel turbos and increase power significantly (even more O2 can be stuffed into the cylinders). Pre-detonatoin is not an issue with diesels. The main purpose of compression (I assume you mean turbo-compression of intake air) is not to heat things up, but to supply more O2. Hot intake air bad, cold intake air good. The heat added to intake air by turbo compression is a bad thing and under sustained high boost can even cause engine overheating.

Last edited by instarx; 08-27-2008 at 01:32 PM..
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