Well I've been searching around for a little bit now but I've not really found a great deal of difinitive information on upgrading of injectors.

 

It would appear that 500-555cc injectors are perfectly adequete for most applications upto around the 500hp area so I guess this covers most of us!

 

There are two types of injectors, the 'phase 1' which covers 90-94's and the 'phase 2' which covers 95-96's. I believe the phase 2s are of the style that most aftermarket ones are? Does this also cover the design used in skylines/supras etc.?

 

Thankfully DeatschWerks does an adapter kit to use phase 2's.

 

What have people done to upgrade their injectors? Any suggestions of good ways around it?

I have 550 venom injectors from the US. Good injector at a small price. Dont be put off from the early reports of flow rate, it all happened in 2005/6, venoms are now a great injector.

 

Al.

got a link?

Here you go matey...... http://cgi.ebay.com/ebaymotors/6-90-93-Nissan-300ZX-660cc-Direct-fit-Fuel-Injectors_W0QQcmdZViewItemQQ_trkparmsZQ7c293Q3a1Q7c294Q3a30QQ_trksidZp4634Q2ec0Q2em14Q2el1262QQhashZitem1e50c431f2QQitemZ130204054002QQptZRaceQ5fCarQ5fParts

 

I know they are 660cc, but that is all i could find at short notice. Try searching the shop on e-bay.

 

Al.

Nismo 555 injectors by far the most popular and reccomend injectors for the 300zx. Available in Phase 1 style.

 

They are also available in Phase 2 style as 615cc, and can be used with the duetchwerks adaptors to fit earlier cars. There is also the 300 degree fuel rail, and you can use the later style lower plenum and rail for fitting later style in older series.

 

I would not trust venoms as far as I could throw them. They are just reworked 2nd hand stock injectors and I know Z's with them now that have problems with them leaking that were purchased much later than 05/06.

Edited July 17, 200916 yr by Yowser

How much truth is there in this post about Nismo 555's? Is this problem isolated to America?

 

Clicky!

you won'tgo wrong with the dietchwerks better value for the money and flow matched

How much truth is there in this post about Nismo 555's? Is this problem isolated to America?

 

Clicky!

 

That is a U.S problem with all Phase 1 style injectors (including stock 370cc) believed to be becuase of the high ethanol content in their Fuel.

I suspected it might be down to their funky fuel!