milesg

I have an 05 GTO that has twin turbos, 340 Pump and 80 LB injectors. I am trying to run a ethanol mix to around E60 or so and will be installing a GM flex fuel sensor this weekend. Will it be a bad idea to install the sensor on the feed Line entering the fuel rail? AEM recommends it on the return line but i do not want to re due my fuel system just yet. Seeing that it is a straight through design i cannot see it restricting anything. Anyone done this?

G Atsma

Can you see right thru it? ALSO, can it withstand 60psi fuel pressure? If the answer is YES to BOTH questions, it should not restrict fuel flow.

dw456post

You can put it on the feed line. It's a -6 fitting which is the same size as the fitting on the fuel rail. As long as you have enough fuel now------

milesg

I'm going to need to upgrade injectors for sure but I'm hoping I can at least make good power with these at low boost.

pantera_efi

iTrader: (1)

Hi Miles = NOT A CHANCE.

Sorry for my humor, just the TT's, HIGH HP with "returnless" ???

The problem is you "trap" AIR/HOT FUEL in the fuel system when you have NO TANK RETURN !

Please, take the time to install/use a tank return, then the Flex Fuel Sensor is easy and a proper item to fit.

FEED your engine correctly and it will treat you VERY well.

Lance

G Atsma

Lance speaks TRUTH!^^^^^^^

Longblue

It seems the best way to use these sensors on the returnless setups is to plumb it in parallel with the feed line. Allows full flow in the feed line and the parallel branch allows the sensor to read without causing any restriction.

Seen this on a few CTSV's with flex conversions.