Highing flowing Injectors Good or Bad??

[Guest darrinspencer]

Are high flowing injectors a good idea or bad.

Does this cause any problems over time

I have been quoted $120 per injector ($720 set of 6) to high flow rb25det injectors

The result is approx 590cc per injector.

[Jimbo2000]

you could probably get a set of 550's for that

[Guest darrinspencer]

you could probably get a set of 550's for that

Generally you pay $550-650 second hand and then get them cleaned $120-150.

New $900 upwards

At $720 for a set high flowed they should be as good as new if they do not have problems.

[meggala]

after hearing others experiances I could not recommend high flowing injectors. yu best to just bit the bullet and buy the proper ones.

[Duncan]

hey meggala any specific warnings/issues, new injectors isn't an option for me but highflows are?

[T0nyGTSt]

Surely 2nd hand RX7 injectors are a more practical way?

T.

[meggala]

well I have heard of hiflowed injectors being checked and they had a huge difference in flow for each injectors if you can't afford the proper injectors you can't afford the up grade. raising the rail pressure will get you a higher tolerance of power I would do that b4 hi flowiing injectors or even use r x7 injectors as tony said.

there is no cheap way to get performance

btw note you said the approx flow rate is 590 cc you buy a nissan sard apexi or denso injecotr and they tell you exactly what they flow not approximates.

how big is your turbo stock injecotrs can support p 400 hp @ the fly wheel when the pressure is raised

meggala

[Lepperfish]

Nismo 555cc injectors 1000 through greenline.. to suit rb25 side feed..

[lwells]

meggala is right. I remember a thread a few weeks ago where this was brought up (sorry, can't be more specific at the moment).

LW.

[Guest darrinspencer]

well  I have heard of hiflowed injectors being checked and they had a huge difference in flow for each injectors if you can't afford the proper injectors you can't afford the up grade.  raising the rail pressure will get you a higher tolerance of power I would do that b4 hi flowiing injectors or even use r x7 injectors as tony said.  

 

there is no cheap way to get performance

 

btw note you said the approx flow rate is 590 cc you buy a nissan sard apexi or denso injecotr and they tell you exactly what they flow not approximates.

how big is your turbo stock injecotrs can support p 400 hp @ the fly wheel when the pressure is raised

meggala

They are 590cc each. was told they would be within 1cc of each other. I should not have used the word "approx"

The same guy told me to be aware of Sard injectors from his experience he has had too many failing to reach there specified CC rating.

The only RX7 injectors that are side feed for the rb25 are 13b S6 or cosmo or 20B primaries.

Try finding them under about $200 each!!! second hand $1200 set of 6. I have.

To use top feed rx7 injectors requires a new fuel rate etc. more cost.

[Zombie]

I am actually seriously considering going down this path, I can apparently get it done for around $200 for all 6 injectors through a connection I have.

When I get around to having it done, after I will get them flow tested and post up the results. That way we can have some solid data on the benefits, if any.

Adam

[lwells]

Well, according to SK in a previous thread, proper hi-flowing costs about $200 per injector -- a little less if labour is free -- and on that basis its cheaper to buy new ones.

http://www.skylinesaustralia.com/forums/sh...19&postcount=15

Haven't been able to find the thread warning against hi-flows yet (as per Megalla's post).

LW.

[Steve]

They are 590cc each. was told they would be within 1cc of each other.  

I would like to see that.

Do it once, do it right, and enjoy:)

[Merli]

They are 590cc each. was told they would be within 1cc of each other.

I seriously doubt that :Oops:

The same guy told me to be aware of Sard injectors from his experience he has had  too many failing to reach there specified CC rating.

Wow... A member of the automotive industry putting a bad word on a competitor's service/product?!?! Well I'll be!!!!!!!!!

Bottom line is, high flows are made by attacking the injectors with a drill. Ask him for a 100% MONEY BACK guarantee of a 1cc difference across the range of injectors, to be tested by an independant source, and see what he says

Even new injectors have upto a 5-6cc difference across the range. You can tune this out via a programmable ECU like the PowerFC, or fit the higher flowing ones in the leaner cylinders.

If your budget can accomodate new injectors, go for it...

If not, I suggest second hand injectors of your required size and have them ultrasonically cleaned and flow tested...

If you're building an "N1" spec car like Dundan, then I guess you have no choice but to take a gamble and get your injectors drilled out, but that would be the last option on my list :spcow:

[INASNT]

Trying to ram 2 much fuel through small injectors by raising the rail pressure and drilling em out can also change the spray pattern of the injector, leading to hot spots, etc

[Guest two.06l]

The same guy told me to be aware of Sard injectors from his experience he has had  too many failing to reach there specified CC rating.

so that comment would mean that all nippon denso injectors are unreliable as the brand name SARD merly applies to the box they came in .Nearly all aftermarket japanese injectors are made by nippon denso to be resold by these companies eg.hks sard nismo etc

[INASNT]

so that comment would mean that all nippon denso injectors are unreliable as the brand name SARD merly applies to the box they came in .Nearly all aftermarket japanese injectors are made by nippon denso to be resold by these companies eg.hks sard nismo etc

Thats a very good marketing tool, call everyone elses product shit and then claim 1cc difference between the products you butcher/highflow

[Guest two.06l]

Thats a very good marketing tool, call everyone elses product shit and then claim 1cc difference between the products you butcher/highflow

someday people will realize that this industry is full of fallicies and old wives tales(read:bull5hit).Unless i see or prove something with my own eyes or have the info coming from a trusted and/or reliable source it cannot be trusted. There is nothing like the self satisfaction of proving results for yourself.

[Guest darrinspencer]

someday people will realize that this industry is full of fallicies and old wives tales(read:bull5hit).Unless i see or prove something with my own eyes or have the info coming from a trusted and/or reliable source it cannot be trusted. There is nothing like the self satisfaction of proving results for yourself.

The company offering to do the work are a "Advanced Performance Centre" without mentioning names

They build plenty of fast cars to PROVE their work

9.97 GSR and

Australia fastest front wheel drive CRX

Just to name a few

So I can only assume they know what they are talking about.

[Zombie]

someday people will realize that this industry is full of fallicies and old wives tales(read:bull5hit).Unless i see or prove something with my own eyes or have the info coming from a trusted and/or reliable source it cannot be trusted. There is nothing like the self satisfaction of proving results for yourself.

The very same can be said about internet forums.....

Adam