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Old 11-20-2019, 10:24 PM   #626
remski
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And... 9 days later this guy finally arrived.
Extended wait courtesy of the local Subaru dealer.




Installed and looking good. (or is it?)



And here we go again... 10 gallons in !!!
Out it comes again.




It was still binding somewhere but I cant see where...
Started looking at pictures and the siphon tube was bent past the float.
It should have been "below" the float as it is now.




Empty, refil, Danielo son..
Once the passenger fuel bay was empty I bridged the return hose to test the new jet-pump.
Works like a charm sucking fuel into the passenger's bay.
This went on back and forth few times as I couldnt tell if all the fuel was pumped out of driver's bay.




Final re-fuel..

0


5


10


15



So.. now you have your gallons to gauge reference.
You're welcome.
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Old 11-22-2019, 12:17 PM   #627
GC8_4_EVER
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2000 Impreza GC8
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Congratulations!!
Would a Radium fuel pump hanger solve the entire issue?

It looks like a nice upgrade and you can choose to utilize the second pump or keep it single:
http://www.radiumauto.com/Fuel-Pump-...-2X-P1194.aspx
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Old 11-22-2019, 05:27 PM   #628
remski
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It would have since everything is pre-routed.
I didnt go with radium since the in tank is only a feeder pump.
It basically idles with almost 0 pressure.

Wish I saw that tank cut-out earlier..
Would have made troubleshooting much easier.


Quote:
Originally Posted by GC8_4_EVER View Post
Congratulations!!
Would a Radium fuel pump hanger solve the entire issue?

It looks like a nice upgrade and you can choose to utilize the second pump or keep it single:
http://www.radiumauto.com/Fuel-Pump-...-2X-P1194.aspx
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Old 12-13-2019, 01:28 PM   #629
remski
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It's been a while..

Here is a teaser.


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Old 12-14-2019, 08:20 PM   #630
remski
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I am sure all of you are so anxious to find out "whats in the box".


So here it is..
KnockBlock
A little device that lets you hear and record the actual knock sound.

But you have a knock sensor you might say..
Yes.. I do.
Then y the expense you ask?
Well I cant tell if what the knock sensor "sees" is actual knock, thus I need to make sure that knock is knock and based on that tune the stock knock sensor.




The unit comes with 2 additional knock sensors.
And with the stock sensor already mounted there arent many options for mounting.

Meet the M10 bolt.
The small problem is the knock sensor takes M8 bolt.




Now meet my "lathe". Not to be confused with latte.



Aaaand ... Done.



Assembled and ready to be mounted.



But wait.. there is more..
Why stop with one bolt ????




A little "lathe" work and a little tap tap later.



Why the nut you ask ???
Well.. this is the Power steering/alternator bracket.. and the torque for that bolt is around 30ft_lb, plus I dont want any tension on the sensor either.
So the stud with the nut is tightened to 30ft.lb and the knock sensor to 20ft_lb.




And here they are ... mounted. (Left one)



And the right one.
Hopefully the location is not that noisy.

Last edited by remski; 12-15-2019 at 01:58 PM.
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Old 12-18-2019, 01:43 PM   #631
remski
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So.. Did my first run with induced knock.
Added about 15deg to timing.



This is apparently what knock looks like.



Frequency range seems to match the calculated frequency.
Since the knock sensor uses 2nd harmonics this is the formual if you ever wanted to double check.
2nd Harmonics Knock (kHz) = 3600 / (3.14 * piston diameter in mm)

Ex: 99.5mm bore.

3600 / (3.14 * 99.5) = 11.5 kHz

Altought I've seen Subaru knock settings at 13 kHz.
Which is weird.



Correlated the audio with my log and looks like my knock sensor settings are working properly. ECU took out 6deg of timing at both occurences.
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Old 12-18-2019, 04:51 PM   #632
kaos200
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OK that's cool. I've always wondered how dialed in our knock sensors are, especially with built blocks/non-oe specs. Back when I used to run a standalone I put in a A LOT of work trying to make sure the knock sensor was sensing true knock. I wish this solution was around back then!
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Old 12-18-2019, 09:16 PM   #633
remski
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Dont know what "your time was" but Link released its first knockblock in 2011.
So possible there there were tools at that time..
They might have been less accurate and more expensive ...

Quote:
Originally Posted by kaos200 View Post
OK that's cool. I've always wondered how dialed in our knock sensors are, especially with built blocks/non-oe specs. Back when I used to run a standalone I put in a A LOT of work trying to make sure the knock sensor was sensing true knock. I wish this solution was around back then!
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Old 12-18-2019, 10:00 PM   #634
kaos200
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Quote:
Originally Posted by remski View Post
Dont know what "your time was" but Link released its first knockblock in 2011.
So possible there there were tools at that time..
They might have been less accurate and more expensive ...
I was tuning on various standalones (Wolf, Tec, Link) from about ~2001, then just rewired my swap for a factory ecu a few years back. Definitely agreed on the less accurate/more expensive part (certainly relative to my budget )

Last edited by kaos200; 12-18-2019 at 10:05 PM.
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Old 12-23-2019, 07:44 PM   #635
bigBADbenny
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Absolutely fascinating posts!
Have you worked out how to eg do a fixed install of the KnockBlock, converting the audio output to a 0-5v signal to use as an ecu input?
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Old 12-24-2019, 12:50 AM   #636
remski
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As far as I see it, its not made to be a permanent thing.
You tune it, set up your knock and move on.
Your "stock" knock should do the rest.


Quote:
Originally Posted by bigBADbenny View Post
Absolutely fascinating posts!
Have you worked out how to eg do a fixed install of the KnockBlock, converting the audio output to a 0-5v signal to use as an ecu input?
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Old 12-24-2019, 01:53 PM   #637
JDMJNKY
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Definitely admire your abilities and your confidence to undertake these tasks. I guess in the end if you do not wish to have someone shortcut you, it's best to learn and do it yourself.
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Old 12-30-2019, 05:13 AM   #638
bigBADbenny
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Gotcha, my immediate thought was that you might be failsafeing your failsafes :P
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