Thread: What injectors do I need?
07-26-2012, 12:38 PM #1
What injectors do I need?
I bought this ski and gathering the parts needed to get it going. I'll be going with external intercooler ( not sure which one yet)
What injectors would you recommend for the engine setup in the link?
Fully built by Nils Castillo
This is a similar engine that was in Jerry's Nilamonster. When this engine was built, Nils had used pretty much all new parts to build it- as seen on the reciept.
Fully built Rude valvetrain
JE forged 9.5:1 pistons
Rotax Racing cam
lightweight Rude valvetrain w/ upgraded springs
upgraded flywheel bolts
fully ported cylinder head work
Riva open loop cooling setup
stock ECU, X-charger
07-26-2012, 01:09 PM #2
42s along with an adjustable FPR to raise pressure and AFR monitoring.
07-26-2012, 01:16 PM #3
If nothing else I'd be asking Nils if he built it.
07-26-2012, 01:57 PM #4
IMO, if that motor is exactly as described and ready to run, it almost demands a better ECU. I would do a V-Tech reflash for 8800 rpms and the injectors of your choice (50s or 60s or 80s). Trying to get the fueling right on a setup like that while using the stock ECU can be very difficult ... in the long run I think it would be far easier to flash the ECU with a setup more suited to your engine. You will also gain a LOT of speed and performance from 8800 rpms vs 8100 rpms, and the engine has the parts to easily do the higher rpm.
07-26-2012, 02:31 PM #5
07-26-2012, 02:53 PM #6
Should add ... I would also recommend you still plan on monitoring AFR and getting a good RRFPR. That is a unique engine and you are going to need to monitor AFR and adjust static fuel pressure and possibly rising rate too, no matter what you do with ECU.
07-26-2012, 03:02 PM #7
The pleasure for me is building things and would spend $$$ on afr and adjustable regulator to fine tune the combination rather than trying to make it more powerful until I know what I've got. I have a ported GPR purchased a few weeks ago that scares the bajeezus out of me and as of yet have never run it wide open for more than a few seconds. For sure this motor is overkill for me. If it runs smooth and trouble free, its performance will be more than I'd care to fully explore.
07-26-2012, 03:05 PM #8
With reliability and smooth running tune being most important on my checklist, can you recommend a rrpr , afr and intercooler for this setup?
What are we talking $$ wise ? 200 for injectors 5-6 for intercooler 400 for a candoo ( I need to program new keys anyway) 400 for rrfpr and 200 for decent afr gauge? 1600-2000 bucks?
07-26-2012, 03:42 PM #9
07-26-2012, 03:56 PM #10
Riva Racing makes a great RRFPR setup that comes with all the peices needed to install and can be purchased here in the online store with a 10% discount if you use the coupon code at checkout, "greenhulk" is the code to use.
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