View Single Post
Old 05-14-2009, 10:23 PM   #1 (permalink)
bgd73
Banned
 
Join Date: Feb 2008
Location: maine
Posts: 758

oldscoob - '87 subaru wagon gl/dr
90 day: 47.06 mpg (US)
Thanks: 21
Thanked 18 Times in 14 Posts
natural aspirated manifold pressure

Here is a topic that no doubt belongs here...
My background has nothing to do with this type of science, but common sense follows me like a dog...



I came across this vid unintentionally...it got me thinking.

I am a fan of the carburator, being unformally educated, I cannot explain myself. the above vid is part of the answer, and I further pursued the subject of manifold pressure at wikipedia.

Manifold vacuum - Wikipedia, the free encyclopedia

I disagree with 90% of wikipedia, I hope at least someone reads it and finds a similar problem I had with thier discussion.

I have an old subaru. In much disbelief, the 2300 pound car (more now with steel and weld) has a swap of 13 inch steel wheels to 15 inch alloys, t-rated tires and they are gnarly rally directional tread (nokian) at 160 dollars a piece. A racing team would use them in gravel.They make noise every trip, I swap them for nothing. :|

The car gets 40mpg on a bad day, I have climbed it to 60....
while in the fast lane of the highway all the way from central maine to southern mass. 10 gears in the dual range transmission, 1781cc and 280cfm carb. It is no miracle to me.

I have concluded it to be a super atomizer with manifold pressure exactly correct for the given displacement utilizing the carbs vebturi with zero loss...and even its own engine cooler.
It adds to the defense: Turbo charged engines are by no means an economical way to get a small engine to be big.
There is one problem with "super stoichers" engines...it has to be a boxer to sustain success. All inlines and v engines have a fault of uneven thermal dissipation for all the cylinders . A boxer is even all the way around. It adds to my frustration.....my belief in a real car is extincted.

  Reply With Quote