SPOOLINmatt

Did a search, kinda useless....

What is the easiest 0-150 fuel pressure sensor to use with S300v3 and whats the easiest way to wire her up?

Turbo-LS

iTrader: (4)

Do you need 150 psi sensor? We run a 100 psi sensor 50 base works great 28 bucks on eBay

5volt Power from tps power out of the ecu. Ground to thermostat housing. Input to the ecu

Either way pull voltage from tps or map power output on the ecu if it's a 5v sensor. The two inputs on the ecu analog 1 and analog 2 work best. The inputs on top of the board in my experience won't log psi properly. We've resorted to raw voltage readings which is still doable but you won't get an actual psi reading

SPOOLINmatt

What sensor are you using? I run 55-60 base so at my full boost I could see a little over 100 but my main concern it being able to catch flow issues early so those few psi above 100 May not really be an issue.

turbohatch96y7

iTrader: (15)

Turbo ls where is your sensor mounted? I have the ss sensor im assuming you have but the fuel pressure reading is not linear and has a lot of variations.

I have mine mounted on my fuel rail. The vibration i assumed what was causing that

Turbo-LS

iTrader: (4)

Fuel pressure is not going to show linear. The pulsing of the injectors Will make it vary somewhat unless your getting spiking. In the rail isn't a great spot. I have my sensor on a 6" stainless line that goes into my regulator port. The pulsing is very minimal on my logs. We have a 50 ish base pressure and only running 35 pounds so 100 psi sensor has been working for me in the past.

I'll upgrade to a 150 sensor this time around as turbo upgrade coming soon I'm sure I'll Be in the 50-60 boost range on top of the 50 base

locash

On the cars I tune, I use a 150 psi sensor, and a dedicated power regulator to drive all of my extra sensors. I don't like the idea of tapping off an existing 5v ecu sensor, as eventually you are going to start dropping the reference voltage to critical engine sensors. Definately do not mount the sensor on the rail, the vibrations and pulsations will make it a pain in the *** to get good data.

.adam.

what kind of dedicated power regulator would you recommend?

Turbo-LS

iTrader: (4)

I got a regulator down to 5v but was unsure of using it. What brand do you use Joe?

98vtec

In for info

locash

Good question, I had my EE buddy source it for me, I'll go dig one up and see if there is a name on it..

Turbo-LS

iTrader: (4)

Thank you

locash

I guess I used them all, lol. More are on order and I will have them later this week..

spectacle

Where is yours? Regulator?

locash

I run a braided line from the regulator to the sensor mounted on the firewall.

Turbo-LS

iTrader: (4)

Pretty much same here Joe. Ridged mount chance of sensor breaking and lots of vibration

Turbo-LS

iTrader: (4)

The 5v regulators I have are made by Tobsun. Supposedly a good piece

SPOOLINmatt

Well lets see if anyone can chime on this.

Had 12volt, and an Aeromotive Pro pump(biggest that Aero Makes), -10 feed, -8 return with this regulator ->(A1000 Regulator) A1000 Injected Bypass Regulator - Aeromotive

Was able to maintain a Base Pressure of 50....

Switched to 16 volt system and then i couldn't get any lower than 60 base pressure...Ran out of fuel or started having pump issues(one or the other or both)

Now i've upgraded to the mac daddy 2345-a Weldon and i can't turn it down any lower than 70 psi base pressure with this setup on 16 volts.(Four ID2200 Injectors, E85)

I know this pump can flow just about all ill need but does anyone have any input on this? Its an FCS tank, 2 filters, etc, etc.

nonvtecallmotor

A few cars that I tune run the same set up without an issue. My car has been this way since I switched to E-85 years ago.

Turbo-LS

iTrader: (4)

Not a fan of aeromotive products. No issues with my magnafuel regulator and pump

SPOOLINmatt

Im not in for overcomplicating. If the fuel holds ill leave it alone.

SharkRacer

Open the regulator and see if the diaphragm is torn and that the ball bearing can move up and down smoothly. Check the spring that it's not rusted or frozen somehow.

I have an A1000 regulator on a Magnafuel 4303 with 10an feed and 8an return. I have no issues getting pressure down to 20psi. Maybe lower if I wanted to. I can't speak for their pumps. I know they've had issues. But their regulators are nearly identical to others on the market and proven to work.

Check this out: http://www.evolutionm.net/forums/ven...omparison.html

SPOOLINmatt

if the diaphragm was torn, would you still be able to turn it way up? Ill inspect it i guess this evening or tomorrow morning.

scmil95eg

That regulator was designed to bypass the flow of an A1000 [~500 lb/hr @ 50spi]. And because it's robust, it can handle a little more bypass flow without pressure creeping than it was designed for. But at 16V your 2345 is flowing ~1600 lb/hr @ 50psi, more than 3 times the pump it was designed to handle. If you take the return fitting off and look up in the return port you can see that the bypass orifice is less than .25". Because of this, I would totally expect pressure creep at idle.

Weldon 2047-438-xxxx valve has a .438" diameter bypass orifice and it was designed to bypass the flow of the 2345.

SharkRacer

^^^That may be the case in a different scenario but he was having this fuel pressure problem before upgrading to the Weldon pump.

https://honda-tech.com/drag-racing-3...-pump-3246938/

There's got to be a return restriction or malfunction somewhere.

Turbo-LS

iTrader: (4)

He never had an a1000. He had a pro pump which flows more than an a1000 initially.