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No Knock 11psi, massive knock at 15psi??

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Old Feb 9, 2010, 09:36 PM
  #16  
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Awesome, have 2 byte load working now. Will do an 11psi run tonight and see how it goes. No point doing any higher until I get it sorted. So others can find it with the search function, the rom is 89970010.
Old Feb 9, 2010, 09:38 PM
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I didn't say reduce timing I said ADD timing.
Old Feb 9, 2010, 09:49 PM
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I mean't higher boost, will give the higher timing a try, just want to log with the 2byteload first.
Old Feb 10, 2010, 05:46 AM
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Before you do another log
Up the fuel pressure to ~43psi on idle with a/c on (2.7bar is too low, stock 440cc inj scaling is for 2.9bar)
Reset the LTFT by ecu reset or a flash
Old Feb 10, 2010, 09:48 AM
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Ok, already did a log late last night with increased timing, back to stock and hit knock at 6500rpm. No one counts of knock lower in the rpm range and alot better acceleration. I didn't get a chance to do another run with more boost. A busy night tonight, but will try and find some time to increase the fuel pressure and do another run or 2.

EvoScanDataLog_2010.02.10_21.01.42.csv
Old Feb 10, 2010, 07:20 PM
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This log looks like u r on track, need to either lower timing or add more fuel after 6000rpm
As you go higher boost, RON95 will give you more problem
Stock injectors are only good/safe for 1.2bar up top at ~90%IDC
I use those cheap hand-me-down evo7 560cc
Old Feb 10, 2010, 07:30 PM
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You have to run the evo intake manifold to use those injectors don't you? I've been given the scaling etc for STI 565cc injectors, which fit straight in.

Before work I increased the fuel presure and reflashed the ecu, but didn't have enough time to do a run. I'll drop the timing up top and see what happens.
Old Feb 10, 2010, 10:01 PM
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Looks pretty good. With your upgraded IC i think you would be ok to run a flat 11:1 AFR. I would back down peak timing though about 2 degree's or so, that should fix your knock.
Old Feb 11, 2010, 12:27 AM
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Went down on timing, a few knocks lower in the load which I had a perfect run previous time, so not sure there. Good up top thou. Upped the boost to 12psi and that run was clean.

Will wait till I get the new exhaust before I do much more.
Old Feb 22, 2010, 10:16 PM
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I got the 3" TBE in today, abit louder than I was hoping, but I can live with it.

Did some logging and straight off it felt like a different car, not being strangled by the small exhaust. Boost jumped up 1.5psi just with the exhaust. I've got boost up to 16psi with 1-2 counts of knock which I can fix pretty easily. After that I'll lean it out abit as its 10.2:1 and then I might have enough in the injectors to get to 17psi. Airtreks I think are 450cc.

EvoScanDataLog_2010.02.23_17.01.32.csv

Sounds like STI Pink 560cc injectors are a straight fit, from what I can tell Evo ones are too long for the Airtrek setup. Can someone confirm this?

Last edited by GregM; Feb 22, 2010 at 10:18 PM.
Old Feb 23, 2010, 01:16 PM
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Just a quick question, are you doing multiple pulls (3 at least) to confirm the knock you are getting? Every once and a while I will get 1-2 counts of knock on tip in, or when I start spooling.

-Will
Old Feb 23, 2010, 01:28 PM
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I did a whole pile of runs, upping the boost alittle each time, but haven't done 2 exactly the same yet. Will be doing some more today and will be doing multiple runs.
Old Feb 23, 2010, 09:01 PM
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I'm getting abit frustrated now. Did a few runs, the pulls looked good, so gave the car some gas out of an intersection and massive knock. Any suggestions?

EvoScanDataLog_2010.02.24_13.57.51.csv
Old Feb 25, 2010, 04:43 PM
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i cannot view ur logs, u can shoot me a PM of u like or post a picture

try to pull anothe log and repeat the situation and see if u get the same knock again
Old Feb 25, 2010, 06:04 PM
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Ok sorry to nit pick but please for the love of god!!! Rearrange the way you log items to evo scan so they aren't spread over 50+ columns! Put them all together and quit logging stuff that you don't need to worry about, like baro, all your fuel trims, and accell enrich.

Next I dont see a reason to run so rich. Target 11:1 Afr and work your timing around it. The knock looks like some part throttle related as you were coming off you went into a load cell with some weird timing.

Again fix the way you log things so I can actually read them a little better.


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