View Single Post
mark houghton mark houghton is offline
Registered User
 
mark houghton's Avatar
 
Join Date: Jul 2008
Location: Central Washington State
Posts: 3,776
Quote:
Originally Posted by gsxrken View Post
That's counter-intuitive to me. Pressure always goes from high to low, and there has to be more pressure in the exhaust tubing than atmosphere, particularly on a turbo car. I could see a leak lowering the volume of exhaust, but not the ratio.

An intake leak, on the other hand, would alter AFRs.
Agreed, it does sound counter-intuitive. Mabye it's like a venturi affect with the volume and velocity of the exhaust gasses moving across a small hole, thus drawing air in.
I haven't had this experience myself, just quoting what I have heard other people comment on. I could be way off base and would be happy to stand corrected.
(oops, sorry for the hijack).
__________________
Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 03-09-2010, 11:24 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #12 (permalink)