1NSIGHT

iTrader: (3)

Wanting to upgrade my injectors and get two 1000cc ev14s. I plan on keeping the stock turbo system for a while.

I wanted to know the dimension of the ev14 injectors that fit in the stockr rail.

Weather I should put the new 1000cc injectors in the primary ports and keep the 550 stock injectors in the secondary. I figured I would get better mpg and be easier to tune.

Or should I get 2000cc and not have to use the secondaries at all.

fendamonky

iTrader: (6)

What end power goals do you have with the twins? (I'm assuming you're basing your questions on owning an FD)

Stock you have 550 side feed injectors in the primary rails and 850cc top feed rails in the secondary rail.

You cannot put 550cc side feed injectors in the secondary rail. Depending on what your goals are, and what support modifications you have done, you may want to just replace the secondary injectors.

What?!?! No, that's really not a good idea at all. You should step back and take some time to read the forum, do some searches, learn about the car some more before you post up stuff that's just going to make you look uninformed and/or stupid.

On that subject... Don't post about injector dimensions for use with the stock turbos (I'm assuming you own an FD???) in the subforum dedicated to Single Turbo information. At the least you should have posted this question (if you HAD to ask it, instead of doing a search) in the General Rotary Tech section...

1NSIGHT

iTrader: (3)

I have an FC. I posted here because most of the users in this sub have experience on this topic.

I don't have particularly high power goals. Its just that with my street port I'm running out of fuel.

Also that running bigger injectors in the primaries like the 2000cc ones is enough fuel for about 300hp or so. More than my turbo can do. Doing that I would not have to stage my injection.

fendamonky

iTrader: (6)

Gotcha, my apologies. I assumed you had an FD (since no mention of your gen/model was mentioned besides a turbo).

I know that people can have issues running a smooth idle with larger injectors, best bet (depending on what your tuner suggests) would be to keep the primary/secondary setup and just run the larger injectors in secondary position. 2000cc injectors would likely be overkill for just 300whp.

FC specifics though.... I don't know anything about FC's, lol!

bumpstart

ummm .. wouldnt think that avoiding the need to stage at all is a path that will take you far and achieve any goal other than simplicity

going all the way back to one injection pulse with a huge injector and poor pattern with extremely short PWM at idle
and all with a fixed injection angle and single injection point .. was such a huge step forward.. said no-one,, ever

you havent stated an ECU and its capabilities and it needs to be considered when making these choices

while i see the good in ev14 injectors,, you have to consider what ( if any ) real advantages they bring for the extra cost and trouble with adapters and fuel rails

certainly there is correctly sized ( for pump fuels ) multi-fuel capable EV1's with 11mm tops that fit right in , at less than half the cost



mostly i call this one as ECU depending
.. assuming you have the worst case.. an older microtech..

then save the ev14 to those with e85 and high end ECU's with better injector fidelity to be able to run a large injector,, sharply

.. as older microtechs that are mostly lobotomised installs ( no BACv etc ) dont like to idle with large injectors and so practical upgrades to primaries may be limited to 800 CC to retain idle quality
( idle can be fine up to 1000 cc if the tuner is good and you continue to keep BACv and air bleeds etc )
yet other older ecus.. like some haltechs , do idle control well
.. and have cleaner injector resolutions and injector driver current profiles for peak hold injectors etc
and so are not bothered by choosing primary injectors as large as 1000 cc

in the same hand .. microtech staging is very simple.. so simple it wont cope well with a large difference in flows between primary and secondary..
so that makes some injector profiles suffer always from notchy staging
while many people run 550/1600/.// none of them enjoy the transition,, and all of them can certainly tell when that happens
.. a good setup.. is seamless to the driver ..

and so the balance with a microtech is to sometimes err towards four equal injectors to get the simple staging,, more right,, more often

usually for those with highflows ( and a microtech ) is to keep the standard primary injectors,, and upgrade the secondaries to 1000 CC multech 2/ rochesters
( modded to be 11mm tops )
and then adjust the staging % to 65-72 % ish and retune

this will keep up the fuel system to all but the 60-1 highflows

as the system grows.. to external reg.. to a larger t04 type turbo with external gate etc ....

then it is a simple matter of adding a second set of 1000 cc primaries ,, and adjusting that staging % down to 50%
( and you will find your previous tune from 550/1000's should have followed the step in this direction and already be nearly right )

now.. multech2's dont have a great reputation when bought in batches
they do however work fine when they are handpicked and graded together ,, and for this reason i always recommend the injectors made by nancy marren
( order the import spec items for 11mm tops )

1NSIGHT

iTrader: (3)

I have a Haltech Sprint Series.

bumpstart

well i think the limitations with that ecu are the fixed ( saturated ) injector drivers , but resolution is reasonably good
and so the high ohming ev14 type injectors are a better choice to find in sizes you want
( as large saturated ( hi ohm ) ev1 type injectors are hard to find above 750 cc )

i would err at going for all 4 at 1000 cc , as the ECU will have no issue driving them accurately at low duty times
( thus trying to avoid any issue where spray patterns and injector response varies significantly between a pair of ev1 and a pair of ev14 and makes staging and un-staging tricky )

for that i think you need adapters to 11mm EV1 rails
.. and should be AOK ( pump and reg depending ) when things upgrade to 400 RWHP

bumpstart

PS.. ev 14 is 48 mm .. ev1 is 60 mm tall ( and jap cars use the 11mm JIS o ring )

adapters avail on ebay etc,, google 11mm ev14 injector adapter