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Cheap injector upgrade

Guest KILLER-T

By Guest KILLER-T,
in Engines & Forced Induction

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JimX Grand Master

JimX

Posted
Posted

GTR injectors should be ok, but they are usually overpriced, and you will still need to modify them from low impedance to high impedance. RX7 injectors are usually more cost effective.

  • 8 months later...
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SLY33 Mentor

SLY33

Posted
Posted
so the 13b's are not a direct replacement for the stockies?

BTW. what are the CC's for stockies on a ER34???

Just a point of interest for the 34 injectors, I know SK has tested them to be around the same as 33 injectors, but just for reference sake: from HPI #32 (Project R34 article)

"the std injectors on the RB25DET Neo engine are only 340cc/min... ...Unfortunately Nissan chose to update this engine with the skinny new plastic bosch inectors, so aftermarket options are limited."

knore Grand Master

knore

Posted
Posted
600hp is 447kW.

At the crank that's a damn lot.

I would imagine 660-740cc would be better but then your car idles bad.

550cc will be fine for ~450hp crank situations.

btw. where the hell are you getting these prices for the cheap RX7 injectors and rails?

My next choice is the Nismo 555cc and they are pretty much $1,000 delivered.

Any contact for the cheap injectors and rail? Hook a brutha up :P

T.

Where can u get a set of nismo 555cc injectors for $1000 delivered?

Steve Grand Master

Steve

Posted
Posted

wld747, do you want your car to be able to idle properly? If not, go the 850cc injectors.

these links I found pretty handy when considering injector upgrades:

http://www.ap-engineering.co.jp/el/inj_side.htm

they also have a page for top feed injectors, but cant find it at the moment, will post up later

here it is:

http://www.ap-engineering.co.jp/el/inj_top.htm

WLD747 Experienced

WLD747

Posted
Posted

thanks steve i didnt realise that with bigger injectors idle becomes stuffed.

wld747, do you want your car to be able to idle properly?  If not, go the 850cc injectors.

these links I found pretty handy when considering injector upgrades:

http://www.ap-engineering.co.jp/el/inj_side.htm

they also have a page for top feed injectors, but cant find it at the moment, will post up later

here it is:

http://www.ap-engineering.co.jp/el/inj_top.htm

Sydneykid Grand Master

Sydneykid

Posted
Posted
Has anyone tried to control bigger injectors with a SAFC??

does it work?

The SAFC doesn't control anything! The ECU does that, the SAFC just bends the input signals to the ECU. So the question should be ................

Has anyone tried to control bigger injectors with the standard ECU?

Yes, and it doesn't work too well, cruise and idle are the problem, as is hot start.

BigDatto Proficient

BigDatto

Posted
Posted

Interesting thread. I have had my finger on this pulse for some time now. Before this old thread was dug up, I found out about Cosmo injectors here.

http://www.nissansilvia.co.nz/tech/howtous...0Binjectors.htm

All the lowdown you guys are seeking !

WLD747 Experienced

WLD747

Posted
Posted

very interesting facts bigdatto, Thanks :)

Interesting thread. I have had my finger on this pulse for some time now. Before this old thread was dug up, I found out about Cosmo injectors here.

http://www.nissansilvia.co.nz/tech/howtous...0Binjectors.htm

All the lowdown you guys are seeking !

R31 POWER Mentor

R31 POWER

Posted
Posted
Also for a mild and tunable upgrade could you use CA18DET inj. at 370-380cc or RB26DETT inj. at 444cc? thanks

I know the GTR injectors need the resistor pack wired in but what about the CA18det injectors? are they a direct bolt in job?

  • 4 weeks later...
Sydneykid Grand Master

Sydneykid

Posted
Posted

Hi Guys does anyone know the part number of the 13B and 20B injectors? I have found a set of 550 cc injectors that are side feed supposedly from a "Mazda". The part number is OF555-425 with a batch code of A40-00. The suspicion is based on the colour, they are red'ish brown, not purple as in the Silvia guide above.

MonstaS4 Collaborator

MonstaS4

Posted
Posted

The part no. for side feed 13B/20B 550cc is 195500-2460. These are purple top and are found in the 13B-REW (series 6 RX7), not the 13BT (series 5 and below which are top feed). They are also in the 20B Cosmo. I'm told all 6 are 550cc, but only 3 are side feed. I'm trying to confirm that the 20B's have the same part no. as the 13B-REW's.

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