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hobieboy hobieboy is offline
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Join Date: May 2002
Location: Up North
Posts: 1,434
Quote:
Originally Posted by NathanUK View Post
What about my 'theory'
Nathan, not sure if I understand this completely: "if the smaller turbo is restricting the exhaust getting out of the engine as the bigger turbo will open up the wastegate more than the smaller turbo which needs all the exhaust it can get to maintain turbo speed and therefore cold side flow."

Bigger turbo tends to need more exhaust pressure/velocity to spin up than smaller ones I thought?

If bigger turbo can flow waaayy more air in same amount of time given a static volume to fill, then it will cause more pressure hence opens up the WG more/longer.

But neither directly relates to how more air actually got into the chamber at same pressure & time, unless (as I "discover" now - not sure if its right) that the small turbo didn't really fill the chamber as full as the big one before the valve closes.
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Old 07-17-2008, 12:56 PM
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