injectors

[tomwest]

im running an adjustable fpr at 5bars. i want to upgrade the injectors, but dunno which ones to put in. i was thinking 1.6s out of an almera, or primera. which is better. or do i have the wrong end of the stick and need something completely different.

 

[frank]

the GA16 ones made mine hard to start tom, but some say they,re ok, and 5 bar is a lot of pressure

 

[Baz]

the GA16 ones made mine hard to start tom, but some say they,re ok, and 5 bar is a lot of pressure

5 bar is far to much in my opinion. What are you upgrading the injectors for Tom?

 

[tomwest]

5 bar is double standard pressure. i dont think the injectors can take it though so im gonna put larger capacity injectors on and lower the pressure. more fuel big bang! what about sr20 injectors or ca18det?

 

[frank]

5 bar is double standard pressure. i dont think the injectors can take it though so im gonna put larger capacity injectors on and lower the pressure. more fuel big bang! what about sr20 injectors or ca18det?

only GA are a straight fit tom, i prefer the topfeed GQ ones personally (in a CGA rail)

 

[Stani1029]

Frank did you have to fit resistors for those injectors? Im awaiting news for the price of my rb25-cg rail getting welded before i rethink my options

 

[frank]

Frank did you have to fit resistors for those injectors? Im awaiting news for the price of my rb25-cg rail getting welded before i rethink my options

dunno if you need them stani tbh they,ve ran flawlessly these last few months

 

[Stani1029]

Ok and what cc are the qg's? I think i have 315cc on the rb25's

 

[frank]

Ok and what cc are the qg's? I think i have 315cc on the rb25's

211cc apparently my mate

 

[r-reg-sr]

http://www.micra.org.uk/threads/34250-custome-fuel-rail-amp-top-feed-injectors?

info

 

[tomwest]

new update. ive reduced the fuel pressure to 4bar. it was putting the spark out. big misfires accompanied by pops and bangs, but no flames yet.



p.s. went side exit yesterday. ran it for a while with neither mid silencer or back box, but both cats. the noise was unholy. only dared rev it to 3 because of neighbors.

 

[tomwest]

Frank, what power increase did you see from putting the ga16s in? was it significant? what fuel pressure do you run at?

 

[frank]

Frank, what power increase did you see from putting the ga16s in? was it significant? what fuel pressure do you run at?

i did,nt notice any really tom, but that was stock pressure (it was lumpy @ low throttle and a pita to start, fuelpump fuse out job every time !)
and i tried different cams and timings and GA t/b and allsorts on the 1311 high comp engine, but i could only get it to do 9 sec 0 to 60 and 16.1 sec 1/4 mile :suspect: but with the QG injectors and SR t/b it jumped to 8 secs and 15.4

 

[Ed]

I don't understand why people want to change Micra injectors? It adds NO power??? the oem ones are large enough as it is, unless your running a turbo.

 

[frank]

I don't understand why people want to change Micra injectors? It adds NO power??? the oem ones are large enough as it is, unless your running a turbo.

i better fit my stock ones back in then ed fwn

 

[r-reg-sr]

i better fit my stock ones back in then ed fwn

i dont think he's referin to you frank:grinning:
(if your going stock can i pm you my address for your goods

 

[Baz]

I don't understand why people want to change Micra injectors? It adds NO power??? the oem ones are large enough as it is, unless your running a turbo.

At least someone said it

 

[frank]

At least someone said it

aye, red herring FTW

 

[karlj]

aye, red herring FTW

:down:

 

[Guy]

If you're not adding a correspondingly larger amount of air to match, adding fuel will achieve nothing more than sooty plugs and poor economy, Ed's right fwn.

 

[karlj]

See I thought matching throttle body with injectors would be a benefit hence having a larger t/b and injectors

 

[frank]

If you're not adding a correspondingly larger amount of air to match, adding fuel will achieve nothing more than sooty plugs and poor economy, Ed's right fwn.

well here,s mine with the CGA blue injectors fitted (off the scale lean when i boot it in 2nd and 3rd, and pulling like a bog standard 1.0 fwn)
http://www.youtube.com/watch?v=qAMeTuvRspQ
and here,s mine with the red QG injectors (off the scale rich and pulling like a 1.5)
http://www.youtube.com/watch?v=AxIKR5OjVcA
i know its a (somewhat limited) narrowband gauge, but we,re talking at least 2 secs difference 0 to 60, so how can "it adds NO power" be correct ?

 

[karlj]

Is that with the sr20 throttle body frank?

 

[frank]

Is that with the sr20 throttle body frank?

sure karl, and CG maf

 

[karlj]

In that case we've kinda done the same thing, the same thing Guy said

More air + more fuel = power

Rather than waste time with just one or the other, all I have to do is sort the pressure out on mine

 

[karlj]

And yes I know it's a very simple way of looking at it

 

[K11SS]

Can I ask what Injectors would you best be fitting for a 5-7psi turbo application?

Assuming I would be able to obtain the maximum power available for that boost level?

Pepper

 

[karlj]

best bet would be to give ed a ring and ask him

 

[K11SS]

I think the forum will return the answer, I emailed him before to no response, I assume he's too busy

Pepper

 

[sr20bud]

5-6 psi would be ok on the standard injectors wouldn't it?

 

[gtsnissanb]

5-6 psi would be ok on the standard injectors wouldn't it?

Yep shouldn't push it out of it's duty
Bigger injectors won't do much without a remap if anything you'll just run rich and wash it out, I'm sick of reading people putting big injectors on their micras!! Why!! It won't do anything on a standard car, a damn air filter isn't a reason to bung some larger injectors in, when will people learn??

 

[Stani1029]

lol a ga16 TB/injectors and ecu on a pre nats micra worked well for me with other mods and on my old turbo's

 

[K11SS]

I would be using a nistune remap of course so maybe the GA16s would be worthwhile

Pepper

 

[Ed]

K11SS don't recall the email, what's your address and I'll take a look.

Frank wasn't directed at you so you may relax! You're ecu (in the nicest way possible) has no idea what's going on, but you have 'assembled' it in a way that it comes together for you. Just sticking on injectors like those said above wont work. That's why the cars wont start correctly. Everything is wrong on those setups.

 

[K11SS]

PM'd Ed thanks!

Pepper

 

[frank]

Frank You're ecu (in the nicest way possible) has no idea what's going on,

even though it recently passed the emissions, averages 70+ miles on a tenner, and does 15.4 sec 1/4 mile :grinning:

 

[gtsnissanb]

even though it recently passed the emissions, averages 70+ miles on a tenner, and does 15.4 sec 1/4 mile :grinning:

Yeah but your a Jammy bug ger

 

[Ed]

even though it recently passed the emissions, averages 70+ miles on a tenner, and does 15.4 sec 1/4 mile :grinning:

Yep even all that.