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Re: Justin & Chad B
Posted by Marko A [Email] (more from Marko A) on Mon, 4 Mar 2002 10:30:58
In Reply to: Justin, does the "passive mode" still use the..., Chad B, Mon, 4 Mar 2002 09:13:14
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Knock detection is left untouched with "passive mod",
but according my tests & experiences, you´ll get better
high rpm boost stability by these easy mods:
* R42 - bypassed
* R138 - 40Kohms,
* 300 ohm resistor in parallel with pressure sensor OR
replace R40 with 1300ohm resistor.
Then adjust P/F pots to taste. Cannot give any accurate starting values since the effect depends on the car (intake/exhaust etc).
But you might try something like F-200ohm & P-20K.
CAUTION, if you´ll experience any boost taper after 4000 rpm with this
modification, it is caused by knock detection system only!
Mostly due lean mixture/hot intake air (stock 900IC)
So, don´t try to fix it by turning pots more clockwise.
Marko
posted by 212.50.192...
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