Injectors

[ARTZ]

Are there any downsides to highflows or are they just as good as the aftermarket ones..

Standard ones can be highflowed to 740cc I believe..whats the cost roughly??

quik google found these..anyone know if they are they any good

http://www.fiveomotorsport.com/import-high-performance-fuel-injectors/nissan

[DVS JEZ]

I have used a few sets of five o highflows and a few of PJ's highflows both with very good results at idle and power. I didn't flow test them but. Just tuned

[Duncan]

Unfortunately I've had the opposite experience.

Remember the most important thing about an injector is how it atomises fuel, not how much fuel it can pass at 100% open. You will literally require 20% less fuel from an efficient injector/one designed for your intake manifold setup.

Unfortunately running a drill through an injector is not exactly precision engineering. I would want to see a standard and hi flow injector side by side on a flow tester, looking at the spray pattern before I would accept it is OK.

[sinistaGTR]

get the deatschwerks if your going that way...known and tested

[DVS JEZ]

Unfortunately I've had the opposite experience.

Remember the most important thing about an injector is how it atomises fuel, not how much fuel it can pass at 100% open. You will literally require 20% less fuel from an efficient injector/one designed for your intake manifold setup.

Unfortunately running a drill through an injector is not exactly precision engineering. I would want to see a standard and hi flow injector side by side on a flow tester, looking at the spray pattern before I would accept it is OK.

I have a few at home. I might video them on the flow bench at 43psi to see when i get a chance. I farkin hate testing side feeds but. Pain in the butt. Need to make up a sr fuel rail jig instead of the machined alloy blocks.

[Duncan]

yeah would be interesting to see, the ones I checked were terrible. Same problem upping the base fuel pressure too, incidently.

[DVS JEZ]

What brand were they?

Did u have issue's with them in the car

[Duncan]

They were hiflow standard injectors (back in the old days, race regs required standard injectors but they did not specifically exclude hiflowing). Instead of having a nice cone spray like a standard injector, it was more like looking at a garden hose. The problem basically was the high flow injectors would not make any more power, they would just use more fuel.....worst of both worlds.

Also, from a tuning perspective, unless it was tuned really rich it would ping like it didn't have enough fuel. Which in hindsight was perfectly clear because the fuel was there but was not being burned properly because it wasn't atomised properly.

[Duncan]

BTW...cost of obtaining, cleaning and hiflowing an injector are pretty bad compared to a properly designed, new injector too. So it doesn't really make sense to me either way these days - big, suitable injectors are available outrageously cheap these days

[bigkevracer]

I looked at Deatschwerks vs other options and there were too many question marks.

PHR on here do ID1000s cheap. Just do it!

[ARTZ]

I have a few at home. I might video them on the flow bench at 43psi to see when i get a chance. I farkin hate testing side feeds but. Pain in the butt. Need to make up a sr fuel rail jig instead of the machined alloy blocks.

I left my SR fuel rail at the injector shop ...that would definately be interesting to see though. I believe the fiveo ones are brand new units that have been hiflowed..maybe they have done a better job than just drilling a bigger hole...maybe not..

I do understand what you mean about atomisation which is why im concerned, but unless I find some nismos cheap I have to look at other options..deatschwerks were others i was considering, About 500$ i have found them for..might have been US though $

arent siemens or someone making some more affordable injectors too now..

[ARTZ]

I looked at Deatschwerks vs other options and there were too many question marks.

PHR on here do ID1000s cheap. Just do it!

who what where???

ed..went through powerhouse site..then remembered id1000s are top feed, i need side feed..

unless i get a new plenum..hmmm..nahh!!!

[GTScotT]

Pretty sure removing the pintle caps from the stock injectors doubles your flow rate.

The injector isnt damaged in any way on the inside and can still function as it should, but the spray pattern is effected as described aboved. how bad it is im not sure... but I can say bad fuel consumption is to be expected

have owned a set of these done by ceffie

[luvpsi]

i posted a thread in regards to this it was a couple of pages long it soon made me think that i should go the deatchwerks injectors but it one of those things like what is the best turbo for a rb25 depends really like if its a daily and you want fuel economy etc

[ARTZ]

hey guys can anyone confirm if these are the real deal nismos??

pics are hard to tell but they look much the same..just not very red.

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=190540563895

damn good price if they are

[JonnoHR31]

if they are they've been repainted. i doubt they are though, ask the seller for part numbers?

[AngryRB]

while were talking bout high flow injectors, i bought some second hand injectors which were private sale, there were advertised as "nismo 555cc injectors", they are yellow on top, 4 holes and side feed

Problem is the numbers cant be identified on google and searches ive done , they have U.J A46-Z00 on them, ive heard there just highflowed standards possibly.

are these going to work for 300rwkw? i was told they made 270, but i dont know. Will have them tested , but any opinions?

[ARTZ]

if they are they've been repainted. i doubt they are though, ask the seller for part numbers?

yes they dont look very red do they..but they do look very much like nismos otherwise..

I looked around for images and notice while some look bright red , under different lighting they will look more brown..So im a bit confused..awaiting reply form seller..

[SargeRX8]

I bought brand new nismo 740 injectors for 620 locally. The guy I bought them bought them from some shop in queensland, their site didn't cost much more than what I payed. No idea what the shops name was though...

[ARTZ]

did they look like the ones i posted?