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SAFC reading knock?

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Old Apr 21, 2008 | 11:25 AM
  #1  
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Default SAFC reading knock?

hey guys i'm running a p28 with s300, and the ECU doesn't read knock.. my compression is a little high 11:8-12:2 and i'm tuned on 91 octane..


the question is, if I buy a SAFC can I hard wire the knock output to my knock sensor on the back of my block? or will that not work? I would like to know before i buy my friend's SAFC..
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Old Apr 21, 2008 | 05:51 PM
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Default Re: SAFC reading knock? (ohsnapzafingcu)

safc does nothing for timing adjustments plus the stock knock sensor is ignored by the ecu over a certain rpm (5000rpm maybe?).

save your money and spend it on dyno tuning.....your tuner should be able tune it safe enough that it will not ping/knock with only sacrificing little power.
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Old Apr 21, 2008 | 07:45 PM
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Default Re: SAFC reading knock? (non-VTEC)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by non-VTEC &raquo;</TD></TR><TR><TD CLASS="quote">safc does nothing for timing adjustments plus the stock knock sensor is ignored by the ecu over a certain rpm (5000rpm maybe?).

save your money and spend it on dyno tuning.....your tuner should be able tune it safe enough that it will not ping/knock with only sacrificing little power.</TD></TR></TABLE>

i didn't want the safc to do any timing adjustments.. but do u know if it can read knock if i wire it directly to my knock sensor?

yes i agree on spending money on dyno tuning and all but my stock tach doesn't work and i'd rather spend money on a safc to monitor other things besides just the knock
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Old Apr 22, 2008 | 02:03 AM
  #4  
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Default Re: SAFC reading knock? (ohsnapzafingcu)

i dont think the safc will read knock.......
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Old Apr 22, 2008 | 04:38 AM
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Default Re: SAFC reading knock? (non-VTEC)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by non-VTEC &raquo;</TD></TR><TR><TD CLASS="quote">i dont think the safc will read knock.......</TD></TR></TABLE>

i'm pretty sure it does. My buddy uses one in his 240 and it reads knock. I know the VAFC doesnt read knock though.
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Old Apr 23, 2008 | 05:36 AM
  #6  
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Default Re: SAFC reading knock? (mr_gs-r)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mr_gs-r &raquo;</TD></TR><TR><TD CLASS="quote">

i'm pretty sure it does. My buddy uses one in his 240 and it reads knock. I know the VAFC doesnt read knock though.</TD></TR></TABLE>

mmk cool. do u know if u can just crimp the knock output to the sensor?
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Old Apr 23, 2008 | 06:35 AM
  #7  
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Default Re: SAFC reading knock? (ohsnapzafingcu)

i'm not sure i'm pretty sure he tapped the signal wire coming from the ecu. I'll try to get in touch with him and ask.
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Old Apr 23, 2008 | 07:59 PM
  #8  
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Default Re: SAFC reading knock? (mr_gs-r)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mr_gs-r &raquo;</TD></TR><TR><TD CLASS="quote">i'm not sure i'm pretty sure he tapped the signal wire coming from the ecu. I'll try to get in touch with him and ask.</TD></TR></TABLE>

that'd be cool. let me know if u can or not.. thanks bud!
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Old Apr 23, 2008 | 08:50 PM
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Default Re: SAFC reading knock? (mr_gs-r)

Even if it could read knock, the stock sensor won't tell you anything useful for tuning. If it were a valuable tool, Hondata certainly would have included it in the software.
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Old Apr 24, 2008 | 04:40 AM
  #10  
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Default Re: SAFC reading knock? (Dartanian)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dartanian &raquo;</TD></TR><TR><TD CLASS="quote">Even if it could read knock, the stock sensor won't tell you anything useful for tuning. If it were a valuable tool, Hondata certainly would have included it in the software.</TD></TR></TABLE>

thats true... it would be nice to moniter though... i plan on throwing some nitrous on in a couple of weeks
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