Ok, take a JRSC setup on a B16 motor. Say you had custom intake cams made up to convert the engine to miller cycle. Change the compression ratio to 13:1, and set up the intake cam so it lowers the intake compression down to 9:1.

Would the above miller cycle setup make more or less power than a B16 with straight 9:1 compression ratio? It would certainly be more efficent wouldn't it?

PS: google miller cycle if you don't know what it is

 

interesting, goes to study*, but wouldnt attempt it myself but sounds like somthing to think about.

 

why spend more money on custom parts when they are not needed?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by paul vang &raquo;</TD></TR><TR><TD CLASS="quote">why spend more money on custom parts when they are not needed?</TD></TR></TABLE>

yea, just stick with whats simple and already proven time and time again

 

you could just get a big *** cam an put it in the intake, and retard it

but honestly, i dont see this working well. mazda used miller cycle engines in the supercharged millenia's.. those cars didnt make anymore power than anyone would expect from a supercharged v6. if it worked that well, more OE's would be doing it. you would have to run an assload of boost to keep the charge in the cylinder rather than it being blown back out

 

Well the main reason OE's have not bothered with miller cycle is due to the increased cost of the blower, intercooler, stronger internals, etc.... The boost requirement is not that high. Keeping with the origonal example:

- 13:1CR dropped to 9:1CR
- Supercharger must provide 1.4:1CR to hold charge in the cylinder
- 1.4:1CR = 0.4 bar boost
- 0.4 bar = 5.9 psi

Anyway this thread is meant as a discussion, just an idea i've been thinking about.