What size injectors?

[Lloyd@JRD]

I would recomend 1000cc.We dont use anything else, pure simple reason is that they are only replaced once.The 1000cc run comfortably as they are only running at 2/3 of their capacity.You shouldnt see any idle problems at all.

[RX7]

1000ccs Blimey, I thought the 4 * 850s I have in mine was a lot !!!

[Lloyd@JRD]

yes, it just saves messing around and offers an end saving to the customer :-D

[Ben]

But will 1000s give low end performance when they're not at full flow? ... surely they simply having bigger holes thus at low pressure fuel is dribbling through?.

Or a more hardcore fuel pump compensates?.

[LR6GSR]

surley you need to know the rate the current ones are running at
IE. at it is recomended that injectors run at between 20-80 % of the available pulse width.
Overly large injector as mentioned will underperform low end, to small may be over running top end.
I have read injectors with to large a pulse width cant pulse efficiently low end leaving the engine running lean. the fuel fails to make it to the combustion chamber in time?
Changes in the fuel pressure will change the injector delivery to.
For optimum performance the injector surely should match the set up you have?
If you make future changes you may need to upgrade.
Or upgrade compramise the performance until you mod to match.

Only my thoughts as i am not your tunner/maper

Liam

[LR6GSR]

This was a thread on the MLR the info is a good source Andy RSX

As a rule, if you base the sizing on bsfc of 0.55 and the injectors running std pressure at 100% duty then you get the following figures

560cc = 0.00224 m

[stockcar]

sorry have to disagree about the 'one size fits all' philosophy...............

far better to have injectors that are not a lot more than "just big enough" due the the refinement aspect

along the lines of the post LR6GSR has made.......

granted if you are not finished modding you may settle for a set that are slightly mis-matched at the mo' to save further costs in the near future

[IWANT1]

sounds good to me liam 423bhp running standard evo injectors 560's i think with fueling spot on !!!!!!!!!!

lee

[LR6GSR]

Lee good to hear that nice figures :-D

Have you got a pic of your graph or have you posted it any where?
Sorry for the off topic, mail me Lee keep this thread clear lol
Liam

[duncan]

[quote="LR6GSR"]This was a thread on the MLR the info is a good source Andy RSX

As a rule, if you base the sizing on bsfc of 0.55 and the injectors running std pressure at 100% duty then you get the following figures

560cc = 0.00224 m