Injector question

Discuss the RB20, RB25 and RB26 series engines.
wowzers9930
Posts: 23
Joined: Sun Nov 11, 2012 10:18 pm
Car: 1991 240sx rb25det swapped

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Okay so my brother is in the diesel truck community and we have a local shop that does diesel injectors, he sends them out to get water jetted out to make them bigger.... Can this be done with gas injectors?

And if not, can you link me to good/cheap 550cc injectors thatll work in the stock fuel rail


Ramius83
Posts: 740
Joined: Sat Apr 19, 2003 8:58 am
Car: 1995 240sx SE
Location: Cumming, GA

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wowzers9930 wrote: And if not, can you link me to good/cheap 550cc injectors thatll work in the stock fuel rail
Good and cheap do not go in the same sentence when buying injectors, no offense. Good injectors are one of the most important things when trying to make sure you have a good running RB.

Try Injector Dynamics, Nismo, etc. Stick with the big name injectors, do a Google search and you will see tons of horror stories with cheap injectors.

wowzers9930
Posts: 23
Joined: Sun Nov 11, 2012 10:18 pm
Car: 1991 240sx rb25det swapped

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Okay and what about my local shop sending stock injectors out to get water jetted to a bigger CC... Flow tested and everything... There being used on 1000hp diesel pulling trucks

Ramius83
Posts: 740
Joined: Sat Apr 19, 2003 8:58 am
Car: 1995 240sx SE
Location: Cumming, GA

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Most/all after-market injectors are "re-drilled" OEM injectors, at least the old style ones are. The new Bosch style mini injectors are not drilled, but the tips are modified/replaced to flow more/differently.

The most important thing about the small independent shops "drilling" out injectors is their accuracy, precision, quality, etc. Usually, you stay away from those places. Why skimp out on something so important? Do it right, do it once, get Injector Dynamics injectors.

wowzers9930
Posts: 23
Joined: Sun Nov 11, 2012 10:18 pm
Car: 1991 240sx rb25det swapped

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I was thinking somewhere along the lines of these
http://www.ebay.com/itm/6-550cc-Fuel-in ... 09&vxp=mtr

These 550s are just a start, im soon to graduate college and once that happens I plan on doing a full build on the rb. I just want something to get me by till then


With the Nismo FPR, how do you tell what your fuel PSI is at because there isnt a gauge on it?

Ramius83
Posts: 740
Joined: Sat Apr 19, 2003 8:58 am
Car: 1995 240sx SE
Location: Cumming, GA

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Haven't ever dealt with that company before. But whatever floats your boat. Your money, your car.

You install a fuel pressure gauge inline on the pressure side of the fuel line after the fuel filter before the rail.

wowzers9930
Posts: 23
Joined: Sun Nov 11, 2012 10:18 pm
Car: 1991 240sx rb25det swapped

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Gotcha, thanks man


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