octane booster

[Todd Knighton]

gofast at ix.netcom.com wrote:
> 
> Hi guys. I *think* I am running out of octane in my BMW 530i - I have high
> compression pistons, and the car is choking at high rpms. Have checked most of
> the obvious things like fuel pressure, filter, etc.

	Running out of octane?  that's a new one.
	What's really happening?  at what rpm, in what gear, cold, hot, always,
have you just recently done some mods?  bad knock sensor?

> 
> I read here that xylene or Toluene is the way to get more octane. How much
> should one add to each tank?

	With only 9.5:1 pistons,  too much octane would slow your burn rate
down so much you'd probably lose power.

> 
> What is the minimum octane I would need with 9.5:1 pistons?

	89 would probably work o.k. with 9.5 though 91 or 93 could be setup for
more advance.

Todd Knighton
Protomotive Engineering