1sicss

iTrader: (3)

I was looking around at injectors and for e.g. it would say 3bar and 4bar what does this mean.

Zach99Z

iTrader: (1)

The bar is the metric reading I believe the injector flows at that pressure. 3 bar is the equivalence of 43.5 psi. For example a 42lb/hr at 3 bar injector will flow at 42lb/hr with 3 bar(43.5 psi) of fuel pressure in the rail. Hope this helps, Zach.

deatschwerks

iTrader: (2)

Taking that further, increasing the pressure causes the injectors to flow more.

We have a few fuel calculators on our site, the calculator on the bottom will give you an idea of how fuel pressure chances affect the flow of an injector.

www.deatschwerks.com/fuel-calculators

3 bar (or 43.5 psi) is the industry standard pressure for rating the static flow of an injector. Many of the late model GMs use a 4 bar system (58 psi), so the injectors in these applications will flow more fuel than they are rated from the manufacturer.

trans_am7935

iTrader: (15)

"bar" is a measurement in pressure, it actually means 1 atmosphere. the atmosphere is on average 14.5psi, case being 1bar=14.5psi. so 4 bar = 58psi

oldmano2z

trans am 7935, thanks for that to the point explaination. i understand entirely , to learn this new stuff from you guys helps out greatly thanks.. oldman...