i pumped 15psi through my motor standard, but had a 2mm gasket on to lower the comp!!
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i pumped 15psi through my motor standard, but had a 2mm gasket on to lower the comp!!
you could fart into a b16a and get over 200kw atw on stock internals.
Great engine.
so what did that achieve?? more boost, less power per psi. less chance of knock, maybe putting the turbo into itsd efficency range?Quote:
Originally Posted by WPN.22R
Would just help for reliability and longevity...
2mm gasket lowers the comp so theoretically you can run more boost on a stock engine
Not really any power difference
less comp = less power = less effective compression. u wouldnt pump 15psi through a standard h22 without some balls.
why don't turbo's work with hi compression.
it's called a flash point. Where the compression in the engine heats up the air/fuel mixture so much that it ignites by itself without the aid of a spark.
i think the flash point for normal fuel is around 15:1.
and i THINK every 3psi you raise up it up's the CR by 1.
essentially in a boosted engine as you wind up the boost your just increasing compression. When the CR of the engine combined with the boost level get's over the flash point you'll get detonation and i think most people know what happens then.
Thats why you can lower compression to increase boost etc etc.
the main other factor in detonation is heat.....if the air is already hot before it enter's the cylinder then it heats up even more.
that is close, but this is a table of compression vs boost:Quote:
Originally Posted by rev-tech
http://www.team-integra.net/sections...?ArticleID=308
(sorry - you need to register)
why efficent intercooling (water to air or air to air) allows you to run more boost safely :)Quote:
Originally Posted by rev-tech
ie the table shows that at a static CR of 8:1 a boosted engine will be creating a compression ratio of:
2psi = 9.1cr
4psi = 10.2cr
6psi = 11.3cr
8psi = 12.4cr
10psi = 13.4cr
12psi = 14.5cr
14psi = 15.6cr
16psi = 16.7cr
"The numbers in the chart in bold indicate the safe zone of operation for a non-intercooled, Supercharged or Turboed vehicle running moderate timing with 92 pump octane (USA) gas and Stock Internals."
i think i know the table you've talkin about.....i've seen it before in a book on turbo's
VERY useful!
basically running a turbo in (or under) it's efficency boost range. Too much above this range and it will develop a hell of alot of heat! which is just wasted energy
i assume on one turbo size on one particular ambient temp for one particular piping length, for one particular type of intake piping metal?Quote:
Originally Posted by tinkerbell
Quote:
Originally Posted by pornstar
it says these are non-intercooled numbers ;)Quote:
Originally Posted by tinkerbell
yer hence why im asking about ambient temps, turbo size, and intake material :)