I'm trying to find the most cost effective solution *cough cheapest cough* that will allow for the best tuning when considering these factors.

If I have the gauge in the car I can watch the pressure as I make runs and adjust with the DSMLink accordingly. But I will need someone to watch the gauge as I make adjustments under the hood.

If I have the gauge on the FPR I don't need anyone to help me adjust it because I can watch the gauge as I make adjustments.

If I have the gauge under the hood it's just like having it on the FPR but I can mount the FPR closer to the fuel rail because it will fit better without that gauge sticking off of it

I just recently saw a car that had a fuel pressure gauge mounted on the outside of the car below the windshield and above tyehood. it was faced towards the car so it could be read from the inside of the car. kind of the best of both the electrical and mechanical

I would get one for inside the car, cuz im a ricer. you will all soon to find that out lol

I was leaning more towards that so I could tune easier while driving but those are REALLY expensive.

it all depends on the company of the gauges to be honest. I have cheap gauges but work WELL for me and my taste.

I have mookie blue led gauges. Functional and ricer at night blue led LOL

I thought of that, but if I drive this car in the rain would the water hurt the electronic component's like the back lighting?

I don't know. I am assuming that it is somehow weather proof or it wouldn't be there. something to look into

Well, a mechanical is going to give a more accurate reading, and the closer it is to the fpr, the more accurate it is. i would get the mechanical that bolts right up to the fpr. That way you can adjust the fuel pressure while you are looking at the gauge.

^ are the mechanical ones really that much more accurate? If I went mechanical it would be the one that attaches right to the FPR but I was considering the electrical because of the "in car convenience"

Well, keep in mind, the in car will be less of a convienience! You have to get out of your car to adjust the fuel pressure on the fpr... right? So if your gauge is in the car, you will have to go back and forth to get it right where you want it.

And yes, they are more accurate. Think about it like this, pressure is an analog signal. An electronic gauge converts the analog signal to a digital signal via the sending unit so the gauge can read it. A mechanical gauge doesn't need the conversion, so it is more accurate.

good points. I've only ever used the small one that attaches to the FPR but was curious about the electrical ones.

the other question is....are all of them the same? between aeromotive, off brands, etc? for something like that, volitile fluid, you would think they would all be pretty accurate?

Think about it like this, pressure is an analog signal. An electronic gauge converts the analog signal to a digital signal via the sending unit so the gauge can read it. A mechanical gauge doesn't need the conversion, so it is more accurate.
[right][snapback]190569[/snapback][/right]
[/quote]

X2 Truth

I would go with the guage under the hood, and stick with the analog

Well, if you look at the manufacturer specs, each one has a different standard of calibration. It can be + or - 1 psi, or less, whatever, the ones that are calibrated more accurately, are obviously more accurate.

As for fluid filled, you probably want that. the fluid is there primaraly to cusion the needle so it doesn't move as much under vibration. Since it will be connected to the FPR, and the FPR is connected to the fuel rail, and the fuel rail is connected to the intake, and the intake is connected to the head, you probably want all the vibration dampening you can get if you plan on watching the pressure while it's running.


Whoa... kindergarten flashback.... and the knee bone is connected to the... damn, now i'm going to be singing that for the next 3 hours at least.

if mechanical is so much more accurate then why are they saying that for air pressure gauges that digital is so much more accurate.. I read an artical somewhere about it. It said that mechanical lost its accuracy after a while. where digital will stay accurate.

i've never heard of a mechanical a/f gauge. the big reason is because exhaust gas is so hot and the wideband o2 sensor that is used sends a voltage signal