Hi Flow Injectors ?

[B-Man]

Can anyone tell me if/what is Hi Flowing standard injectors ?? I'm guessing that they are bored out a bit and given something for more oomph. ??

Are they as good as replacing std injectors with say Nismo or Sard injectors ??

Thanks in advance,

[Steve]

Have you been reading Zoom mag? I saw an article in there where it states that Paramout performance in QLD (07) 4659 9711 did this to ford injectors, taking them out to 550cc from a mere 180cc. Unfortunatley, the process is stated as being 'a bit of a secret'. It would be interesting to see what they can do to a set of stock Nissan 370cc squirters!

[GTS-t VSPEC]

I wouldn't recommend this approach if you can afford to purchase properly sized injectors. With most injectors it is possible to replace most of the parts to make them hi-flow, but the cost heads toward that of buying aftermarket Bosch ones.

Aslong as the injectors are flow tested to ensure that they are providing the stated flow rate then they should be fine, but you have to weight whether the risk is worth the cost saving.

If you have a GTS-t then this appraoch would have the added benefit of not needing to replace the fuel rail, for top feed injectors.

See'ya:burnout:

[slip]

i would recommend just buying 2nd hand aftermarket if you can.

after working in an injector/efi place and listening in on a few conversations on high flowing R&D, youre better off replacing them. Proper atomisation was a problem.

[Blitz]

Brendan,

I went and spoke with Jim from Croydon Racing Development and he also recommended hi flowing my stock injectors rather than replacing with an aftermarket injecter like the Nismo 550cc.

His reasons being its alot cheaper, the stock injectors can be modified to run 650cc and they are individually balanced.

[Jay95R33]

Hmmm, sounds good.

Especially for us side-flow blokes

Any idea of price??

J

[B-Man]

Nick,

Thanks - Mark has a guy working for him now that does this - and has done to mine - I believe mine are now flowing at 610cc .

I know I am a bit of a guinea pig, but like you say, cheaper and better - The car should be on thre Dyno on Friday !! Let's see the results !!

Merry Christmas !!

[Steve]

Brendanf,

If its not too personal, could you give me a ball park for getting the high flow done. I am really interested as my injectors are rapidly approaching 100%, and side feed high impedence are farking expensive even second hand, as you undoubtedly know.

Cheers

Steve

[GTS-t VSPEC]

Hi Guys,

I was discussing this option with some of the tuners I know, and they said not to do it. An injector is build as a sealed unit, therefore the only way to get more fuel out is to bore the nozzle. The nozzles are specifically designed to atomise the fuel as it leaves the injector, creating a fine spray of fuel mist. The reason for this is that it provides a greater A/F surface area, which aids in a cleaner burn and therefore better power delivery.

If the nozzles are bored then the fuel will squirt out in a stream, and not provide the optimum fuel delivery. I know a few people see this as a cheap alternative to expensive after-market injectors, but I would wait and see the results before jumping on board. If this was a good option then I think we would have seen the Japs doing it, or it would have been mentioned in an Import car mag.

This is just my opinion, if anyone wants to try it then cool, just let us know how it performs and the cost of the hi-flowing.

See'ya:burnout:

[Clint32]

The process has been around for a while and now apparently there are some people that can do it as good as a new injector, unsure who tho, i was told it costs about $100 each injector.

[GTS-t VSPEC]

At $100 per injector I can get real 550cc injectors. Sounds like an expensive exercise to get someone get more fuel out of your injector. If I get some 550's then I can at least sell my factory ones.

See'ya :burnout:

[Steve]

$100 per injector? Is that high impedence, side feed? If so please let me know where, as I was looking at second hand 550s, and the cheapest I have seen were over $200

Steve

EDIT: first heard of the high flowing in a Zoom mag, where a guy was getting 413rwkw using high flow injectors.

[GTS-t VSPEC]

Steve, they are 550cc bosch injectors, but they are top feed as I'm modfying the fuel rail aswell. Side feed is just a pain, as there are not enough varieties on the market.

See'ya:burnout:

[Steve]

Ah, top feed - just wish I was doing the plenum, then it would be a different ball game. When you recon in the cost difference between the side feeds for use with stock plenum, against the cost of top feed with a modified plenum, the cost isnt a huge difference.

Have heard it is damn near impossible to get top feeds under the stock plenum (why in gods name didnt they give the gts the same plenum as the gtr).

Steve

[GTS-t VSPEC]

Steve,

I always hated the GTS-t plenum design, therefore I changed it as soon as possible. It gives me the added advantage of a range of top feed injectors at resonable prices. You can always have my factory ones and hi-flow them once I get my new injectors put in.

See'ya:burnout:

[Steve]

GTS-t VSEC, you got pm:)

Steve