This question is just as it sounds, would there be any increase in power if they standard 3ltr magna injectors were replaced with 6 2.6ltr magna injectors? This is for a verada kr

i doubt it, not unless you needed the extra fuel.

what if you were to reverse the process, 3l injectors in a 2.6 would i get better economy?

The theroy is if u were to put 2,6lr injectors into a 3ltr magna u would be getting more power due to more fuel, if u were to do it the otherway around the engine would be starved of fuel, and possibly cause misfiring from too lean a mixture.

The theroy is if u were to put 2,6lr injectors into a 3ltr magna u would be getting more power due to more fuel, if u were to do it the otherway around the engine would be starved of fuel, and possibly cause misfiring from too lean a mixture.
more fuel means you'll be running rich :nuts:

read the post properly.....

Actually, now that i think about it, would it not matter having bigger injectors, as the fuel pump will still pump the same amount of fuel into the engine? Bigger injectors on a turbo vehicle yeh, but thats why you alter the fuel/air ratio to allow more fuel in which is why you need the bigger injectors?

No the fuel pump will not pump the same amount of fuel into the engine. The fuel pump does not regulate fuel pressure or flow. That is the job of the fuel pressure reg.

Putting the 2.6 injectors ( from memory they flow slightly more) will be similar to an adjustable fuel pressure reg, only not adjustable.

You can use the extra fuel if you can get extra air, which you really can not, despite the common mis conception that a CAI will make big improvements.

The engine will simply throw the unburnt fuel out of the exhaust

Putting 3.0 injectors will make it very economical, when you burn holes in your pistons and the car is off the road getting a new engine.

Realistically though, the ecu with the 02 sensor, under certain conditions will sense the rich mixture and reduce the pulse width of the injectors and you will be back to where you started (going on the rich theory again) The only place bigger injectors are helpful is in a forced induction situation as boost can be adjusted also. Draw back, the larger the injector the poorer the flow thus the fuel will not spray the same.

No the fuel pump will not pump the same amount of fuel into the engine. The fuel pump does not regulate fuel pressure or flow. That is the job of the fuel pressure reg.

Putting the 2.6 injectors ( from memory they flow slightly more) will be similar to an adjustable fuel pressure reg, only not adjustable.

You can use the extra fuel if you can get extra air, which you really can not, despite the common mis conception that a CAI will make big improvements.

The engine will simply throw the unburnt fuel out of the exhaust

Putting 3.0 injectors will make it very economical, when you burn holes in your pistons and the car is off the road getting a new engine.

Realistically though, the ecu with the 02 sensor, under certain conditions will sense the rich mixture and reduce the pulse width of the injectors and you will be back to where you started (going on the rich theory again) The only place bigger injectors are helpful is in a forced induction situation as boost can be adjusted also. Draw back, the larger the injector the poorer the flow thus the fuel will not spray the same.
Well i was at least half right lol.

Had my car serviced couple o months ago and one of the things i had done was an injector clean, i was told that my injectors, all magna injectors of that series (TR) had a flow rate of 30 Psi as opposed to other manufactures ie commodore and falcon of about 18 Psi, so as far as i can figure you already got high flow injectors all you would need is a kick ass fuel managemnt sytem.

That is the fuel pressure not the flow. While pressure will change flow, the pulse is controlled by the ECU. The flow is measured by having the injector open and measuring how much flows in a given time It is measured in cc

so exactly how much diff will a higher pressure make to flow rate, if its noticeable at all?

Because your ecu should correct your injector pulses at low revs, wouldnt the extra fuel at high rpm be beneficial? the only reason i could think otherwise is that the fuel preassure reg may not be able to hold preassure due to more fuel being used under heavey acceleration.
cheers dave :cool:

Because your ecu should correct your injector pulses at low revs, wouldnt the extra fuel at high rpm be beneficial? the only reason i could think otherwise is that the fuel preassure reg may not be able to hold preassure due to more fuel being used under heavey acceleration.
cheers dave :cool:
Yeh but you're still forgetting that the extra fuel is NOT being used, fuel needs air to burn, if theres not enough air, it wont burn. This is what madmagna tried to tell you. So unless you had some sort of mechanism which gave the engine more air (eg. turbo), there would be no point.