fuel pressure guages

[bigg_vin]

just wondering what i should look for in a fuel pressure guage.

do they have to be externally mounted, or can they be mounted inside the car?

are there different types that use different coinnections to the back of them? ie, do you need to hook up a fuel line to the back, or is it electronically operated?

is autometer the reconmened brand, or would speco do?
thanks

 

[bigg_vin]

or is it easier to fit a gauge under the bonnet in between the fuel pump/regulator and the carby?

thanks

 

[RVK 355]

Yer just fit one to the carby side of the pressure reg that way you will know what pressure is running to the carb

 

[digisol]

It's illegal "and pretty dangerous" to fit a fuel pressure guage under the bonnet or inside the car, consult your local authorities for their rules, ANDRA made them illegal under hood or inside the roll cage capsule yonks ago.

Some US vehicles show them fitted outside the windshield on race orientated cars in the drivers line of sight, which would likely be illegal here anyway.

But why would ya want to anyway once the pressure is found, the guage is removed.

 

[RVK 355]

1st ive heard, i know running a fuel pressure guage inside the cabin with out the fuel cut of valve is illegal, wat about all the andra spec cars running fuel pressure guages under the bonnet?? seen plenty of people still running them

 

[digisol]

7.10.2 Fuel Containers / Tanks
1. Fuel tanks must be located in an open area.
2. Fuel tanks may not be located under the hood (bonnet) in the truck class.
3. No fuel tanks, pressure gauges, fuel pumps or fuel lines are allowed in the driver’s
compartment.
4. If the fuel tank is located behind the driver, a fire barrier is required from the front fire
wall to the rear firewall beneath the driver’s seat between the fuel line and the driver.
Minimum width of the fire barrier is the width of the driver’s seat.
5. No fuel tanks or containers are to be located behind the centre line of the rear axle of
Mini Tractors.
7.10.3 Fuel Lines
1. All fuel lines are to be either steel braided, high pressure reinforced rubber or fuel
grade (red reinforcing) high pressure PVC.
2. No plastic tubing is allowed.
3. Fuel lines should be braided and clamped or shielded and clamped within 6” of the
blower belt (where fitted) and any moving engine component (alternators, water
pumps, harmonic balancers, etc).

And that's for racing vehicles.

ANDRA rules as listed, Much the same for other classes, except the likes of funny cars etc.

The use of a gauge is not prohibited, "if it's an electrical guage" the plumbing of fuel lines inside a passenger car is not on, and damm unsafe.

Sure check the fuel pressure by all means, but the permanent fitting of a gauge and hiding it under the hood is somewhat pointless, semi serious racers would ckeck fuel pressure now and then, to fit one on a commodore would be as usefull as tits on a bull.

While any private vehicle owner would be entitled to check the fuel pressure once every 5 years, that would be extreme, the racer may test the fuel pressure once before a meeting, there would be no point having one on any AA dragster, he would have other things to watch much more important than fuel pressure, after all it's over and lost in a few seconds, even in pre stage if this hypothetical racer sees the fuel pressure dropping, what's he going to do ? the obvious, shut it down and lose by default, changing fuel pumps would take some minutes even with a proper pit crew.

There is simply no point, no road car, no matter how hotted up would ever need it, spend the cash on something more usefull.

 

[bigg_vin]

so can you have a fuel prssure gauge under the bonnet, that can only be read when the bonnet is open? inline with the fuel line to the carby?

 

[digisol]

Most likely the only way.