Ignition retard knock sensor.

[Gary Derian]

How did it drive before the turbo?  If it takes 5 psi steady state now,
before the turbo it should not have been able to maintain speed.  It sounds
like the turbo addition has not improved power so much as it has increased
detonation.  What is the exhaust pressure while you are cruising at 5 psi
boost, both before and after the turbo?  Maybe the exhaust is plugged up, or
just plain restrictive.

Gary Derian <gderian at oh.verio.com>



> Nope.  Mysteriously, it started after I added the turbo :)  I have other
> things I need to fix like getting an intercooler installed and getting a
> cold air induction system set up that will help a lot, but I don't know
> how long that'll take me and I'm still concerned that it won't eliminate
> the knock.
>
> I've set the timing back to stock from having it advanced a bit pre-
> turbo and that helped.  Also, I'm running water injection but want to
> eliminate that as well.  I recently made a round trip of about 9 hours
> each way (a few days apart).  Loaded down with a roof rack, camping
> supplies, tools and spare parts (and a dog) and I was running a constant 5
> psi of boost at 65 - 70 mph and 8 psi on the big hills.  Water tank ran
> dry in the first 30 - 45 minutes.
>
> Knock isn't so bad on premium, but I'd like to run mid (or even low)
> octane fuel without a problem.
>
>
> --Dan
> houlster at inficad.com
> http://www.inficad.com/~houlster/amigo.htm