FFE Rail > Injector Sizing?
 

Hey all,

About to buy a secondary fuel rail from FFE, and just wanted to make sure on something before I pull the trigger -

FD Secondary Rail | Full Function Engineering

On the pull down menu, it asks "Secondary Rail Fitment" and you get to choose between "60mm injectors/48mm Injectors (No ACV)/34mm Injectors".

I am planning on running Injector Dynamics/ID1000 Secondary Injectors.

What size Secondary Fuel Rail Fitment do I want?

I am planning on running this setup with the Fuelab Mini FPR, OEM Primary Fuel Rail, 550cc Primaries, Apexi RX-6 Turbo, Apexi PowerFC, Emissions Delete, and running premix.

Thanks in advance.:)

Those are the height of the actual injectors you will be using and the spacers to set the height of the rail. I run 48mm for most applications. I usually run the 48mm. The 38mm is if you need to clear the air control valve. 60mm is the old-style bosch injectors that are obsolete now. I would go with 2000cc secondaries. I have them in stock shoot me a pm or call me at the shop.

So from what I understand.. 60mm's are 38 mm's with that anodized aluminum top hat. Is there any performance benefit to this? Better atomization or anything?

get the rail and 2000cc... I have both rails and I run 1000cc and 2000cc.. no leaks what so ever.. no fitment problems.. I don't have the air pump..

If you are dead set on running ID1000 secondary injectors, then you will want the fitment for 48mm injectors. However, I think the ID1000's are going to be too small for an RX-6 powered car with the factory 550cc primaries. This combination will allow a maximum hp of somewhere in the 330-350 rwhp range. You might entertain looking at the new ID1300's to get a little bit more headroom so you aren't maxing out the duty cycles from the very beginning.

Also, most people will recommend the ID2000's because they are tried and true, easy to control, and give a lot of headroom. This is obviously a good option, but comes with a $90 premium over a set of two ID1300's.

And just an FYI, here is a list of the ID injector lengths w/o adapters and the electrical connector used for each...

ID725: 48mm (USCAR connector)
ID850: 34mm (USCAR connector)
ID1000: 48mm (USCAR connector)
ID1300: 34mm (USCAR connector)
ID2000: 34mm (Denso connector)

Sorry for the fitment confusion guys.. We're trying to simplify everything but there's just so many possibilities.

We'd also recommend the ID1300 in secondaries. Not quite the head room as ID2000's but with all stainless internals gives the option of running MTBE race gas if you want. If your fuel system is up to the task you can also raise the base pressure to 60psi and they'll flow just under 1600cc/min.