Steve, If you do some simple maths: - at 2000 rpm each rev takes 30/1000ths secs, at 8000 rpm each rev takes 7.5/1000ths sec. Intake stroke is one in four. The inlet charge is in the inlet tract for (7.5 x 1.5=11.25/1000ths sec. Time available for heat transfer to air is very small and temp difference between manifold and air is small so charge heating is small. As air flows through the manifold it is slowly cooling the manifold all the time as well. I think the main benefit of this system is for the manufacturers bank balance rather than any significant improvements in thermodynamic efficiency. Cheers Feral Errol
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Greer Sent: Friday, 22 March 2002 10:42 PM To: [EMAIL PROTECTED] Subject: phenolic spacers List Anyone know where we can get the material used to make these?? Found out about them on autospeed.com and this is a good article http://home.san.rr.com/scmorgan/spacers/Theory_FAQ.htm Thanks Steve --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
