1G GM flex fuel sensor location. Where on return line?

[Geeb]

Hey guys, Im doing my fuel lines while my engines getting honed and stuff at the machine shop.

Where in between the tank and the afpr are you guys installing/mounting your flex sensors? I know there's no specific spot, but What's the best/most practical location?

Thanks guys.

Ps, I'm mounting an innovate ethanol content %/fuel temp gauge next to my Speedo in the cluster. I'm still figuring how to hook that all up too. Only reason I mention is because it comes with a flex pigtail so it all has to be spliced in n work together so I guess it has to be a bit closer to the dash...

What do you think?

 

[1990TSIAWDTALON]

My flex fuel sensor is in between the return and my afpr. If you dont have a afpr then place it in the return line and you will be fine. It is close to the dash in that spot for your needs. It's exactly where mine is.

 

[91talonts1]

I put mine right after the regulator on the return line. Made a bracket and mounted to an unused bolt hole on the firewall so that it's hidden by the intake manifold.

 

[Geeb]

My flex fuel sensor is in between the return and my afpr. If you dont have a afpr then place it in the return line and you will be fine. It is close to the dash in that spot for your needs. It's exactly where mine is.

Yeah I know, but I meant where on the return like closer to the regulator or closer to the tank

I put mine right after the regulator on the return line. Made a bracket and mounted to an unused bolt hole on the firewall so that it's hidden by the intake manifold.

Awesome yeah that's probably what I will do

 

[SOADweskey]

Mine is right after the regulator. I still have a stock intake manifold and I mounted the sensor to the intake manifold support bracket.

 

[godschylde777]

What sensor are yall using? And does Ecmlink support it?

 

[1990TSIAWDTALON]

GM Flex fuel sensor and it is supported by EcmLink.

 

[dsmcrzy]

Mine is also in the return line just after the AFPR. Also running a GM flex fuel sensor.

 

[godschylde777]

my return line is -8 i don't see a fitting for that.

 

[91talonts1]

my return line is -8 i don't see a fitting for that.

https://m.summitracing.com/parts/rus-644133

 

[godschylde777]

https://m.summitracing.com/parts/rus-644133

will it cause a restriction?

 

[SOADweskey]

Nothing that will matter, -8 is overkill for a return line anyway. Unless your using two fuel rails a -12 feed, and a mechanical fuel pump.

 

[godschylde777]

Nothing that will matter, -8 is overkill for a return line anyway. Unless your using two fuel rails a -12 feed, and a mechanical fuel pump.

my feed is -10

 

[91talonts1]

will it cause a restriction?

I've seen stuff like this on the LSx forums.

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I am running a magnafuel 4303 with the FF sensor inline on a -8 return no issues. The car I saw using this particular y setup had dual 4303s.

 

[Geeb]

my return line is -8 i don't see a fitting for that.

my feed is -10

What's your hp, needing all that?

 

[Jerzm3]

I place mine just below my FPR and mounted to the firewall. Here is mine.

 

[bradikus7]

Let me revive this old thread as I'm in the same boat.......every picture I see, the sensor is mounted horizontally requiring angled AN fittings, is this sensor not able to be mounted vertical like inline with the fuel return line after the AFPR?

 

[dsmcrzy]

You can mount it in any direction. Horizontal, vertical... doesn’t matter. I think what you are seeing is personal preserence of horizontal mounting.

 

[Vegas Smith]

It goes like this: real men mount them horizontally

 

[wishihadatalon]

This is the way I mounted mine. I read on the Haltech forums that the ideal location is on the pressure side of your return line which is between the rail and the regulator. Mounting it after could cause some cavitation.

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[dsmcrzy]

Beautiful AN hard line! Did you do that yourself?

 

[wishihadatalon]

Beautiful AN hard line! Did you do that yourself?

Thank you and yes I did!

 

[dsmcrzy]

What flaring tool do you use?

 

[wishihadatalon]

https://www.homedepot.com/p/RIDGID-...n_STH_BOSS_3091372-_-product_desc__W915361520. Works well on both aluminum and stainless so far.