Cold/Hot....Spool up???
12-27-2006 | 09:48 AM
#1
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From: NAS PAX River, by way of Orlando
Cold/Hot....Spool up???
Ok, my understanding is you want as much heat stored as possible in the exhaust side to aid in spool up.
So why when it is cold out I get spool up 100-200 revs sooner???
Yes, we have talked extensively about colder air aiding in the overall performance and boost build in the cold, but not about the effects on spool up.
Just curious.
So why when it is cold out I get spool up 100-200 revs sooner???
Yes, we have talked extensively about colder air aiding in the overall performance and boost build in the cold, but not about the effects on spool up.
Just curious.
12-27-2006 | 11:25 AM
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Originally Posted by toddk911
Ok, my understanding is you want as much heat stored as possible in the exhaust side to aid in spool up. So why when it is cold out I get spool up 100-200 revs sooner?
12-27-2006 | 12:55 PM
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Colder air is denser providing more available oxygen for air/fuel combustion. You move more air, combust more completely, resulting in better efficiency. Better efficiency, earlier spool up. At least that's my crude understanding in a nutshell.
12-27-2006 | 01:10 PM
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From: San Diego (miramar), CA
You want as much air molecules in the cylinder as possible (cold dense air). Hot air is a benefactor because you want to increase pressure. (hot air expands... thus pressure... which = greater spool)
