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Discussion Starter · #662 ·

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93 Civic HB SI, 95 Civic HB CX
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Dropped in.The fittings can be clocked which is nice. Still need to wire in the power
Did you put a stock sock back on the new Walbro 450? I found that without it, even with the tank very full, starvation happens easily.

The sock disperses the suction and prevents a vortex from forming, otherwise the pump literally generates a mini tornado in the center sump area and cavitates, yes it moves that much fuel!

Another wild attribute of this pump, is its ability to PUMP lol. Seriously, when I've used it to evacuate fuel from the tank, it will pump good volume in free flow/non restriction into a gas can for about 15 seconds, then start to cavitate. The damn pump can literally clean the sump area of the tank faster than the trap doors canq allow fuel to flow back in hahaha.

You then have to stop the pump, wait 15 seconds for fuel to flood the turbine area of the pump again, and reconnect power to it, only to get another 15 seconds of pumpage.

Its a beast of a pump in free flow, no issues though once its properly restricted having to fight a fuel pressure regulator, so long as the pump has a sock.

Otherwise, you'll need to fill the sump with fuel cell foam or similar. But a new stock sock flows just fine.

Also, beware of the cheap 90 degree socks that come with certain pumps, they dont work as well as the OEM 45 degree angle ones that sit flush on the bottom of the tank.

Sure the 90's are a sock to stop vortexes from forming, but because those cant sit flush on the tank bottom, it leaves a lot to be desired when fuel levels drop to about 1/4 tank.

45's FTW!

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Discussion Starter · #668 ·
I have both an OEM style Denso sock and a sock that Radium sent. I’m using the Radium sock right now so we’ll see if it works or not. Hoping to get this all buttoned up soon so I can prime the system and check for any leaks.
 

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Discussion Starter · #669 ·
https://flic.kr/p/2nxPUJR Trac Tuff reservoir came in.

https://flic.kr/p/2nxMpPr Moved the fuel filter and was able to get the fuel lines up off of the engine harness.

Harness lengths all figured out, just need to finish up my splices. Rywire and others put all the splices into bussed connectors like Honda did from the factory, but I’m using barrel splices instead to keep everything nice and clean.

Hoping to finish up the flex fuel sensor this week.
 

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Discussion Starter · #670 ·

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Discussion Starter · #672 ·
Thanks! I tried to make the Radium mount work but just don’t have the space.

https://flic.kr/p/2nyGpr5 Fuel rail to FPR plumbed in and 1/4” air line run from IM to FPR.

https://flic.kr/p/2nyFhaC Harness progress. From left to right the breakouts are: firewall plug, HondaRulez board, C131 connector (converted to 090 series) and leads for ECU A11, D10, IGP, and ground, and then three bundles for ECU plugs A, B, and D. The shortest yellow wire on the right is the longest I can make my harness.
Can’t fit my ECU in the stock location anymore since my power wires run through there now, so I’m going to scoop up a Checkerd Sports ECU mount and get it up on the firewall above the passenger footwell.
Still quite a bit to finish up before I can drive her.
 

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Discussion Starter · #675 ·
https://flic.kr/p/2nBK5fA Testing set up. Just measuring continuity/resistance. About 90% complete so far. Hopefully I can finish up tonight and start installing it.

https://flic.kr/p/2nBBA4g
https://flic.kr/p/2nBK4R4
https://flic.kr/p/2nBHZam Distributor shield ground and COP connector completed, and a couple of close up shots for ya’ll.

I also got the fuel rail mounted and just need to finish the feed line. Once the harness is in I can connect the battery power and prime the system to check for leaks.
 
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