365cc injector too big?

[normality78]

Finally, went to dyno tuned my 7AFTE by using emanage. Found out i was running freaking rich whn offboost. I was being told my injector was too big for my setup as Im using GZE 365cc injector

dyno result showed 160whp with quite a few problem exists (not related with injector issue).

So may i have some sifus opinion on this. Issit 365cc injector was way too big for a 160whp setup car?

 

[ravenhil]

What's your engine capacity, boost level and max rpm?

 

[normality78]

1.8l, boost 0.8 bar, max 6k rpm...

its not the boosting side too rich. its the off boost, the closed loop normal city crusing side

 

[lan evo]

bro,u got management for the car rite?i mean piggy back or standalone.if yes isnt the management can control how much the injector spraying?i might be wrong.anyone?

 

[normality78]

yup. im running emanage now. its a piggyback.

on off boost, its all minus until the end liao but still damn rich. but whn run in boost, its enaugh as its still got more. its still in minus side though... i was being told that if s/alone thn no such problem coz s/alone injector driver is more capable

 

[lan evo]

is the injector max out when on boost?if not then u can try lower cc injector

and when u ask whether 365cc is too big,i think it depends on mod and engine capacity.but std vr4 using 410cc.so dun think 365cc is high for 1.8

 

[acbc]

200ps and 220ps VR4s uses 450cc
240ps VR4s uses 510cc

I'm using 510cc with e-Manage, car still burn rich but perhaps tmw when I mess with fuel regulator, might get better results. With current settings, thick black smoke will come out from exhaust each time I start the car.

 

[khoyos]

acbc, thick black smoke at startup? that doesnt reflect good tuning...

 

[lan evo]

200ps and 220ps VR4s uses 450cc
240ps VR4s uses 510cc

I'm using 510cc with e-Manage, car still burn rich but perhaps tmw when I mess with fuel regulator, might get better results. With current settings, thick black smoke will come out from exhaust each time I start the car.

sorry for wrong info.i think the correct is 510cc for vr4

 

[ravenhil]

For a 1800cc engine running 0.8 bar of boost and ends at 6000 rpm max, the 365cc injectors are just right, you might get 90% IDC at 6000 rpm but that's alright since you rarely get there. The optimal range of the IDC is always below 85%.

You should set your fuel pressure to 43 psi or 2.9 bar and see if this can resolve your problem. I suspect that the pressure has been turned up so high that the injectors have problems closing. See if this helps. They way it is running now, it seems impossible for you to run lean.

 

[normality78]

is the injector max out when on boost?if not then u can try lower cc injector

and when u ask whether 365cc is too big,i think it depends on mod and engine capacity.but std vr4 using 410cc.so dun think 365cc is high for 1.8

nop. the injector was not max out at all. even whn full boost, i still havent need to plus fuel on emanage setting. it was still in minus.

 

[normality78]

For a 1800cc engine running 0.8 bar of boost and ends at 6000 rpm max, the 365cc injectors are just right, you might get 90% IDC at 6000 rpm but that's alright since you rarely get there. The optimal range of the IDC is always below 85%.

You should set your fuel pressure to 43 psi or 2.9 bar and see if this can resolve your problem. I suspect that the pressure has been turned up so high that the injectors have problems closing. See if this helps. They way it is running now, it seems impossible for you to run lean.

raven,
i does not having any fuel regulator to tune. it was running stock fuel regulator. :cry_smile: :cry_smile:

 

[acbc]

acbc, thick black smoke at startup? that doesnt reflect good tuning...

Yeah, it's all mess up... I'm still running on stock VR4 airflow anyway. Will need to install the 609 airflow from Evo soon and get the car retune.

 

[acbc]

raven,
i does not having any fuel regulator to tune. it was running stock fuel regulator. :cry_smile: :cry_smile:

You should consider using an aftermarket fuel regulator for any increase in injector size or fuel pump.

 

[jep3003]

sifus,

sory 2 disturb ur thread bro normality78 but wen i read ur thread, i also scared lor... already got my gsr injectors...

im drivin a civic 1.6 sohc turbo boosting 0.7bars, still running on standard injectors n fuel pump... gona change to gsr 390cc, wud dis b 2 much???? im also using emanage...

 

[ravenhil]

raven,
i does not having any fuel regulator to tune. it was running stock fuel regulator. :cry_smile: :cry_smile:

The adjustable fuel pressure regulator should be a priority purchase. If anything, it will continue to be of use as long as you are adding serious power to your ride. So buy it with confidence. Please get one with a gauge.

 

[normality78]

You should consider using an aftermarket fuel regulator for any increase in injector size or fuel pump.

would it help for my case? Coz i do not want to spend on something which is just for guessing. i dun question your suggestion so pls dun get me wrong

 

[normality78]

The adjustable fuel pressure regulator should be a priority purchase. If anything, it will continue to be of use as long as you are adding serious power to your ride. So buy it with confidence. Please get one with a gauge.

the impression of AFR that im having is to uprate the fuel press in your fuel rail. Tats why i didnt get it at the very 1st plc as i see no reason for it

 

[normality78]

sifus,

sory 2 disturb ur thread bro normality78 but wen i read ur thread, i also scared lor... already got my gsr injectors...

im drivin a civic 1.6 sohc turbo boosting 0.7bars, still running on standard injectors n fuel pump... gona change to gsr 390cc, wud dis b 2 much???? im also using emanage...

you will definietly need a good fuel pump

 

[jep3003]

waitin 4 my frn 2 chnge his fuel pump... den il take his evo 7 pump, dis also i tink 2 much 4 my car.... already got regulator...

planning 2 chnge injector, fuel pump n tune dis saturday so need info fast...