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 <<O>>  Difference Topic AddKnockToP30G00 (r1.1 - 26 Jan 2006 - Home.synoptic)
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%META:TOPICINFO{author="synoptic" date="1138251900" format="1.0" version="1.1"}% %META:TOPICPARENT{name="ECUHardwareMods"}% On 1720 or 11f0 I've:

remove R140, R141 - 10k add R107, R115, R116 - 220R

I also add (they may not be essential):

C94 - 4u7 16v tant Q20 - a143

On 1550-150x:

remove R78, R77 (Reverse Side) add R37 (RS), R50 (RS), R38 - marked 221 add C82 - 4u7 16v tant

You can convert a P75 to P30/72. The only ones I've seen use the 1550 board and no KS. I've converted one to p72 in the past. Is that a US one you have? I've also used a p29 1550 board and added KS, heated O2 and DOHC VTEC code.. for example.

The KS board itself has been documented elsewhere in terms of tuning the KS frequency - I assume that's the R12 and R15 you refer to.

The knock sensor frequency, and thus, its operation, is affected by the bore of the cylinder. From what I can tell, each ECU's knock board is also dialed in to specific characteristics of the engine, to filter out engine noise from knock..

using a knock board with an engine other than it was designed for may not be very effective..


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