Is there any real reason that some people prefer one injector brand over another? Im in the process of my all motor build and I need to purchase injectors. Wanted to get some feedback why you would pick say for example RC over Precision, or vice versa. I only want first hand testimonials please. Thanks for your time. The info will be much appreciated.

 

anyone?

 

reason: spray patterns

RDX

 

alrite, how do I determine a brands spray pattern?

 

type of injector, fuel pressure, etc.

Google search to learn more.

stock = pintle style

RC = Lucas rotary disc

GM = Rochester style

to name some.

 

thanks, so brands dont matter its based on the spray pattern desired. How do I know what pattern I want?

 

Pintle and Rochester style injectors tend to atomize fuel better, but rotary disc style is allegedly less likely to fail under higher duty cycles, and the spray pattern said to be more consistent over a wider range of fuel pressures.

HT member Master of the Universe has said that he prefers Rochesters. Many guys have good luck with stock, and others insist on RCs.

In some cases, rotary discs may provide good atomization when positioned such that their laser-beam-like streams fire on the back of the intake valves so that at operating temp the fuel is vaporized.

Honestly, provided you don't operate any of them beyond their optimal range, you can likely get good results with any of the three styles named, provided they're clean and well made. Keihin (OEM Honda), Siemens, Bosch, and others are known to make good injectors.

 

ive heard the precision 680's have a similar spray pattern to the rdx's

 

Precision 680s are Rochester-style; ball(s)-on-seat.

RDXs use pintles; cone-on-seat.

It's possible that their spray-patterns are similar. Some Rochesters use numerous ***** for better atomization.

 

what are you trying to do? I'd say the most important part is the flow rate, and the ability to tune the engine. If you can tune for it, injector choice is not a huge deal IMO

 

Been using RC injectors for years like 10 years or more. never had one fail and have over 100k miles on one set before i sent them in for cleaning and testing they were fine then sold them. Hard to go wrong with RC and they stand behind their products.

 

I think Im gonna go with a set or RCs

 

For me it was a no-brainer. RC

 

would 440 to large for an all motor application? I figured it wouldnt be an issue since you can tune all things fuel related with Hondata or a stand alone ecu but wanted to be sure. I figure 440s give me plent of room to grow

 

440s are good.