setup:
- gsr
- skunk2 manifold
- hondata/uberchip

... which ecu would be better to run and why?... since i no longer have the dual butterfly intake manifold, will the p72 cause any unwanted/ill effects?... if using the p28, will not having a knock sensor cause any unwanted/ill effects?... anything else i should consider?... thanks in advance...

 

run P28, don't worry about knock sensor, they're non functional aboved 5000 RPM.

stan

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Flamenco-T &raquo;</TD></TR><TR><TD CLASS="quote">, don't worry about knock sensor, they're non functional aboved 5000 RPM.

stan</TD></TR></TABLE>

could you explain this to me? Why would they be non-functional above 5k rpm? Seems like thats where they would be needed most.thanks

 

honda knock sensor aren't functional. They are not design to detect knock aboved 5000 rpm which is where it is needed the most.

at that level, 5000 rpm and aboved it prooly will mistaken the exceesive noise as knock and it can retard the timing, eventhough your timing is perfectly fine.

They just not designed to work aboved 5000 rpm, so they are useless to begin with

stan

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Flamenco-T &raquo;</TD></TR><TR><TD CLASS="quote">honda knock sensor aren't functional. They are not design to detect knock aboved 5000 rpm which is where it is needed the most.

at that level, 5000 rpm and aboved it prooly will mistaken the exceesive noise as knock and it can retard the timing, eventhough your timing is perfectly fine.

They just not designed to work aboved 5000 rpm, so they are useless to begin with

Just curioius where you got that info? Not that i'm doubting you (cause i'm not) I just like to know info came from (reputable source, hearsay, fellow honda junky,etc.....) thanks

stan</TD></TR></TABLE>

 

I have been around hehe. I actually learned this about 3 years ago when hondata first takes off, I actually had a long talked with Doug nad it was the first time I had learned it.

stan

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Flamenco-T &raquo;</TD></TR><TR><TD CLASS="quote">I have been around hehe. I actually learned this about 3 years ago when hondata first takes off, I actually had a long talked with Doug nad it was the first time I had learned it.

stan
</TD></TR></TABLE>

Been around the block a few times ehh? J/k....thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16ahybrid &raquo;</TD></TR><TR><TD CLASS="quote">

Been around the block a few times ehh? J/k....thanks </TD></TR></TABLE>

yeah, trying to find MILF's hehhehehe LOL

 

Flamenco-T, I totally respect your tech advice...but I have to half way disagree with you here. How do you know that the ECU disregards the knock sensor after 5000 Rpm's? Could you please show us where you found that? I know his question is in reference to a p28/p72 ECU...but Im using an AEM EMS and I find the knock sensor quite usefull, espically above 5000 RPM's. Using the Knock Sensor setup guide by AEM, you CAN tell if you're getting detonation through out the RPM band, not just below 5000.

Side note: 1.8t_EG...hope you enjoyed the move from here to there.

Bottoz

 

I guess I should have been more clear, the knock sensor will work at any RPM range, but at 5000 RPM, the stock Honda ECU disabled it, because the excessive noise causes by the motor may confused the knock sensor of the actual pinging. Sometimes, with low silicone content pistons, the piston slap can be detected as knocking as well.

Therefore, even if he uses P72, the ecu will disabled the knock sensor at above 5000 RPM, when you actually need the KNock sensing at that point more than anything.

stan

 

Roger that, thanks.

Bottoz

 

Flamenco-T is correct about the stock KS. It is an emissions device used for tuning max spark advance under cruise, which is the part throttle area of operation where your ignition advance is at it's highest. Ever drove a vehicle where, at cruise with a slight bit of tip-in for very mild acceleration on the highway it pinged? A Honda with a functional KS will never do that.

And just like all emissions devices, it gets ignored under WOT. It also, as Flamenco-T mentioned, gets ignored above 5K rpms.

The only difference between P72 and P28, IMO, is whether you need IAB control. Which in this case the poster does not, so the much cheaper P28 is his solution. Personally, I get spiteful and refuse to chip KS equipped Honda ECUs unless I can disable the KS.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bottoz &raquo;</TD></TR><TR><TD CLASS="quote">
Side note: 1.8t_EG...hope you enjoyed the move from here to there.
</TD></TR></TABLE>

... yeah!!!... its beautiful down here right now... too bad my car is 'under the knife' right now... like jeremy, i am waiting for my cp pistons to come in so i can finish the rebuild... thanks...

... thanks for the posts everyone... i think i will go with what i have (p72)... unless i find a sweet deal on a p28 (time to hit the junkyards)... for all!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18onboost &raquo;</TD></TR><TR><TD CLASS="quote">

P72= 200+ dollars
p28= 100 or lesss</TD></TR></TABLE>

well since i already have the gsr ecu... p72 = $0... and the best i have seen p28's on honda-tech is ~$125 shipped... if i could find a p28 for ~$100 or less, i would prolly go with one and sell the p72... if not, then i guess i will just chip the p72...