interesting injector information

[canuck coupe]

I'm going through my RXP-X to see what I bought. A previous owner did many Riva bolt-on mods, and the guy I bought it from had no idea what had been done to it.

I looked up my injectors to see if they are OEM or aftermarket, and I found out something interesting.

They're made in China by a company called DEFUS
(https://www.df-fuelinjector.com/0280...lia-08-14-4-0i)



for the Australian Ford Falcon!





The 4.0L inline 6 turbo in this ute makes 360 HP.



The website doesn't specify the flow rate. I just says, "same as original."

Are these OEM for a Rotax 1630? Does anyone recognize them? Or did someone get creative and swap these in?

[ptscon]

Sorry but those are trash. I did a flow test on those and they flow like a garden hose, zero atomization and forget about any consistent flow rate. China can make decent stuff but those injectors are garbage.


Here is how they flow, 3 on the left are OEM and the one on far right is defus, it's a garden hose flow pattern.

[711jrp]

I have seen injectors with spray patterns intentionally like that but they are normally secondary injectors that spray directly at the top of the velocity stack or are part of a throttle body injector setup. All in all economizing on injectors is a big gamble.

[canuck coupe]

I'm still curious to know if these injectors are stock or if they've been swapped in.
It's only curiosity. These injectors will never go back in.
This engine is getting a cam and an 18# wheel. Feeding it fuel will be a set of VT1100s and an RRFPR.

[ptscon]

I'm still curious to know if these injectors are stock or if they've been swapped in.

Not stock, someone cheap put them in.

[tiderider]

I smell BOOM and why it was sold..

[canuck coupe]

I smell BOOM and why it was sold..

No BOOM found so far.
I have completely stripped the head.
Rockers, valves, valve seats, and cam all look and feel perfect. Tops of the pistons and the cylinder walls look excellent.

I pulled the engine this afternoon. I might crack the crankcase this evening. I don't expect to find anything.

Leakdown showed 30% loss in every cylinder. So far I haven't found a reason.

[micco]

Leakdown showed 30% loss in every cylinder. So far I haven't found a reason.

Probably valves leaking.