Down side to bigger injectors?

[timk]

the spray pattern on the RX7 injectors is more of a dribble pattern than a spray pattern, think of it kind of like an open hose line, vs a hose line with your thumb over the end and you'll be getting the idea

Do you have any sources for this info? They just look the same as any other pintle nozzle injector to me, but I'm obviously no expert!!

[Sean]

I've seen the rotary injectors in a spray test & cleaning machine, and can confirm they do not spray wide like a regular injector.

It's fairly well accepted and documented that the rotary injectors are like this, I beleive it's to do with how/where in the intake fuel mixes and atomises - A rotary person could likely explain the reasoning.

If you're anywhere near a rotary specialist who has an injector test/cleaner, I'm sure they could give a quick demo. Alternatively you could try a set and see how you go, you might find them bearable.

[Steampunk]

I've been looking at higher-flow injectors alot lately and have read that Rotaries have "primary" and "secondary" injectors, with different flow rates.
I didn't look into it too much, so I didn't find out if the differing flow rates is a function of the EMS or the injectors themselves.
Perhaps this is also why others have been told to steer away from injectors from Rotary engines, cause if you get different flowing injectors, you'll get weird engine behaviour.

[bark]

I had the red/pink top 550cc rx7 injectors and would not recommend them for a piston due to their spray pattern as others have mentioned. The rx7 injectors have a narrow spray pattern whereas a piston injector has a wider spray. You will get better combustion in a piston engine using a wider spray pattern.

Prices for piston 550cc injectors will be pricey but worth it, do it once do it right. It's easy to say I know, but trust me its worth it in the end (if it ever ends)!

[Sean]

If buying new, I've found the larger the capacity of the injector, generally the cheaper they are. just FYI...

[SuperMazdaKart]

bark's back in Adelaide? since when?

[bark]

In regards to the Subaru STI injectors (as I want/need an upgrade myself) it appears that they WON'T fit our MX5's as they are 4mm short in length according to the Miata website http://forum.miata.net/vb/showthread.php?t=244385&page=4.

Vu, yes I am back in Adelaide - you have a PM.