Upgrading Ecu And Injectors

[R33-RB26DETT]

Hi there,

Current Specs:

R33 GTR 1996

Stock Turbos running @ 1bar

Apexi POD Filters

Apexi Front Pipes

HKS High Power Exhuast

Havent had it dyno tuned yet so not sure what power figure but i would have though at least 200awkw yeah?

Expected Power Figure:? ___

New specs this monday hopefully:

550cc Nismo Injectors

PowerFC

Dyno Tune

Expected Power Figure:? ___

Should i expect to see a large increase in power by just upgrading my ECU and Injectors?

p.s i am upgrading my injectors becuase my current ones are leaking, or would it be better just to replace the O Rings?

I am so lost at the moment and need guidance, im not sure if i am investing my money by upgrading my injectors.

It would be good to get peoples opinions.

[R33-RB26DETT]

Ok, perhaps this is of an ambiguous thread since lots of views and no replies..

Basically, do you guys think that just a Power FC and bigger injectors on a 33 gtr would make a huge difference in power? what would be a rought awkw power increase?

[paulr33]

the main difference you will have will be response, power, fuel economy and torque

all of these should increase once you fit the PFC and tune it correctly

[PM-R33]

Hi there,

Current Specs:

R33 GTR 1996

Stock Turbos running @ 1bar

Apexi POD Filters

Apexi Front Pipes

HKS High Power Exhuast

Havent had it dyno tuned yet so not sure what power figure but i would have though at least 200awkw yeah?

Expected Power Figure:? If the engine is healthy i would say around 210kw with these mods

New specs this monday hopefully:

550cc Nismo Injectors

PowerFC

Dyno Tune

Expected Power Figure:? Anywhere from 230-240kw depending on the tune

Should i expect to see a large increase in power by just upgrading my ECU and Injectors?

Mainly from the tune, yes you should see a decent increase throughout the rev range, injectors wont really affect much since your standard ones can still flow ok at these power levels.

Edited May 24, 2008 by PM-R33

[R33-RB26DETT]

Thats quite impressive!

im surpised that you think the PowerFC alone would increase power by up to 30kw at the wheels..

I will definantley be getting this then, especially since it can increase your fuel economy.

Yeah i think Injectors may not be worth it until i upgrade my turbos.

The mechanic said:

$150 to repair you current ones:

$1200 to get new injectors

While it would be good to have bigger injectors now they would serve little purpose in terms of power increase i suspect.

[-_-StRyDeR-_-]

your getting taken for a ride if your going to pay anywhere near $1200 for new injectors...

[R33-RB26DETT]

your getting taken for a ride if your going to pay anywhere near $1200 for new injectors...

he said nismo injectors are $180 each plus installation $1200 all up.

he was from pro tek, yeah seemed way too pricey.

I think ill be taking it to chasers motorsport they are always spot on.

[GeeTR]

Injectors don't make power as such, they supplement it. If your stockers weren't at their limit, and limiting the amount of boost you can run (they wouldn't have been at 1bar) then you'll make NO more power from bigger ones.

Before the tune i reckon 210-230rwkw depending on a few factors.

Tuned you could make another 20, depending on how aggressive the IGN and AFR's are set (down to the experience of the tuner) As mentioned, its the low down response / tourqe (hence; fuel economy) that you'll notice more so then a top end. power figure.

When your leaking fuel from the injector area, clean away the stains with carby cleaner and look real closely. Often they leak from the small indent in the plastic body. Remove, clean surface and fill with araldite. Replace o-rings and insulators (as even if they weren't leaking to begin with, they could now after they've been removed and reinstalled, specially if they are the original 20yr old ones.

Sard 700's cost me about $110 each, 2 years ago. Perfectrun.com.au are hocking Nismo 550's for $125each atm. They take 20mins to install.

The above is the process I would (and have) gone through. You can do it all yourself with basic hand tools. If you do purchase new injectors, simply set the injector correction in the PFC and drive the car to your tuner.

GL

Edited May 25, 2008 by Beer Baron

[R33-RB26DETT]

Injectors don't make power as such, they supplement it. If your stockers werent at thier limit, and limiting the amount of boost you can run (they wouldnt have been at 1bar) then you'll make NO more power from bigger ones.

Before tune i reckon 210-230rwkw depending on a few factors.

Tuned you could make another 20, depending on how aggressive IGN and AFR's are set (down the experience of the tuner) As mentioned, its the low down response / tourqe that you'll notice more ( and hence fuel economy)

When your leaking fuel from the injector area, clean away the stains with carby cleaner and look really closly. Often they leak from a small indent in the plastic body. Remove, clean surface and fill with araldite. Replace o-rings and insulators (as even if they weren't leaking when you remove the injectors and install em again, the stock 20yr old ones will prolly start to leak now.

Sard 700's cost me about $110 each, 2 years ago. Perfectrun.com.au are hocking Nismo 550's for $125each atm. They take 20mins to install.

The above is the process I would (and have) gone through. You can do it all yourself with basic hand tools. If you do purchase new injectors, simply set the injector correction in the PFC and drive the car to your tuner.

GL

Thanks for the info, i havent taken my car to a mechanic once yet since purchase and have done all modification including full service by myself at home.

I find that you learn about you car that way and save money at the same time.

ideally i would love to repair the injectors myself, but i have searched ebay and forums and cant find a kit to repair the injector seals anywhere.

[GeeTR]

Which seals are you referring to, as all new o-rings and insulators from Nissan are like $80.00 and are usually in stock.

As said, i would check the indent i spoke of first though, its extremely common.

[R33-RB26DETT]

Which seals are you referring to, as all new o-rings and insulators from Nissan are like $80.00 and are usually in stock.

As said, i would check the indent i spoke of first though, its extremely common.

The leak is definantley coming from the top of the injector but its hard to see exactly where from, maybe i will pull them out tonight and see if can pinpoint the leak that way.

[R31Nismoid]

IMO you wont make bugger all power difference.

Maybe 10-15rwkw if that.

Injectors - wont help anything in terms of more power.

The stock ECU can pump out 250rwkw without a problem, mine has done it as have countless others before it.

The main gain will be the fuel maps and power delivery, not peak power. So overall dont be surprised if the result isnt 'substancial'.

Also invest in cam gears, there are very good midrange gains to be had. Best bang for buck mod.

[msuen]

hi nismoid, i thought a power fc would increase his power from about 200awkw to 250awkw ?

regards

mike

IMO you wont make bugger all power difference.

Maybe 10-15rwkw if that.

Injectors - wont help anything in terms of more power.

The stock ECU can pump out 250rwkw without a problem, mine has done it as have countless others before it.

The main gain will be the fuel maps and power delivery, not peak power. So overall dont be surprised if the result isnt 'substancial'.

Also invest in cam gears, there are very good midrange gains to be had. Best bang for buck mod.

[nizmonut]

Question's you should ask of yourself?

what size are standard gtr injectors

what duty cycle do standard injectors run at

and can these be improved by changing ecu's alone

for example take my gts4

it is running an aftermarket ecu, a after market single turbo, exhaust, and fmic,

this car was a parts project i had stuff left from other cars i have had.

so taking into account it has a RB30e block rb26det head

with a single TB intake of similar flow to a standard sixTB intake.

it was dyno's at 401 hp at all four wheels reached at 6350rpm

torque 388 reached at 5100 rpm,

considering the valve train cams cam gears are standard the

stock 440cc injectors were at 86% duty cycle at peak rpm.

will nizmo's 550cc injectors make that bigger difference,

why not go 740cc and reduce the duty cycle because come 400 horse any one will tell you that eventually you will want more.

then those nizmos will not be far off redundant either.

i think you will find you are paying alot for the brand name, go bosch,

i cant claim to know what prices they charge for them there in aussie but ill bet on it the 740cc's are cheaper then the nizmo 550's

ps. i think the standard turbo's @ 1 bar will be struggling. anything over that you can kiss your ceramic goodbye on its way down the tail pipe.

Edited May 24, 2008 by nizmonut

[rb26s13]

if its just the orings around the injectors that are leaking at fuel rail side or plenum side it'll cost about 20bux in orings to fix it.. wont take long to do however if injectors themselves are leaking.. im unsure on the price and a set of sard 700's or 800's can be had for 600roughly put the injectors and powerfc in yourself its very easy to do and im sure you can find all the info needed somewhere on here to do it all than just drive it down for the tune

however before doin that look into just replacing the injector orings first

Edited May 24, 2008 by rb26s13

[R33-RB26DETT]

if its just the orings around the injectors that are leaking at fuel rail side or plenum side it'll cost about 20bux in orings to fix it.. wont take long to do however if injectors themselves are leaking.. im unsure on the price and a set of sard 700's or 800's can be had for 600roughly put the injectors and powerfc in yourself its very easy to do and im sure you can find all the info needed somewhere on here to do it all than just drive it down for the tune

however before doin that look into just replacing the injector orings first

You read my mind, as i mentioned i would prefer to repair the injectors myself as i would like to learn how to do it.

Trust me when i say there is no information on how to repair you injectors on here, in fact if i figure out how to do it i might even create a DIY how to repair your injectors thread..

What i might have to do is head down to repco and see if they can order a replacement kit from nissan direct, for o rings and insulators.

Only problem is when i pull out the injectors i have no idea how to open em up to replace all the seals? I assume it would be fairly straigh forward, but do you need any special tools?

[R33-RB26DETT]

Question's you should ask of yourself?

what size are standard gtr injectors

what duty cycle do standard injectors run at

and can these be improved by changing ecu's alone

for example take my gts4

it is running an aftermarket ecu, a after market single turbo, exhaust, and fmic,

this car was a parts project i had stuff left from other cars i have had.

so taking into account it has a RB30e block rb26det head

with a single TB intake of similar flow to a standard sixTB intake.

it was dyno's at 401 hp at all four wheels reached at 6350rpm

torque 388 reached at 5100 rpm,

considering the valve train cams cam gears are standard the

stock 440cc injectors were at 86% duty cycle at peak rpm.

will nizmo's 550cc injectors make that bigger difference,

why not go 740cc and reduce the duty cycle because come 400 horse any one will tell you that eventually you will want more.

then those nizmos will not be far off redundant either.

i think you will find you are paying alot for the brand name, go bosch,

i cant claim to know what prices they charge for them there in aussie but ill bet on it the 740cc's are cheaper then the nizmo 550's

ps. i think the standard turbo's @ 1 bar will be struggling. anything over that you can kiss your ceramic goodbye on its way down the tail pipe.

Standard GTR injector size is 440cc from my research.

Seems to me that i wouldn't need 700cc injectors becuase my power goal is only around 350awkw, so 550cc injectors should be plenty..

In regards to the Bosch over Nismo you are prohably right, not worth the extra coin just for the brand name.

One thing i disagree with you on though is that the stock GTR turbos are struggling on 1bar, i have read on many different forums that 1bar is a safe and reliable boost level to run the stock ceramic turbos with.

In fact when you remove the boost restrictor which comes stock with all GTR's that set the boost level to 1 bar automatically, which is still safe

[R31Nismoid]

hi nismoid, i thought a power fc would increase his power from about 200awkw to 250awkw ?

regards

mike

As i said in my post, you can make 250rwkw on the stock ECU no problem

So how would it increase what he could otherwise achieve without it?

[R33-RB26DETT]

As i said in my post, you can make 250rwkw on the stock ECU no problem

So how would it increase what he could otherwise achieve without it?

Seems to me though that if i were going to be upgrading my injectors and turbo soon that the next logical mod would be an Apexi FC.

Apparantley you can run upgraded injectors with the stock ECU?

I know that it wont make a huge increase in power upgrading just the ECU, but it should increase my fuel economy after a tune - and give me a strong platform to allow further modifcations such as turbos and injectors.

Edited May 25, 2008 by GTR-PWR

[msuen]

i'm assuming that is after remapping the stock ecu. Otherwise how is this possible ? A gtr with exhuast and increased boosts gets around 210awkw-230awks. SO how do u get 250 awkw unless you tune the stock euc or get an after market one ?

as stated by pm-r33

Havent had it dyno tuned yet so not sure what power figure but i would have though at least 200awkw yeah?

Expected Power Figure:? If the engine is healthy i would say around 210kw with these mods

New specs this monday hopefully:

550cc Nismo Injectors

PowerFC

Dyno Tune

Expected Power Figure :? Anywhere from 230-240kw depending on the tune[/i

mike

As i said in my post, you can make 250rwkw on the stock ECU no problem

So how would it increase what he could otherwise achieve without it?

Edited May 25, 2008 by msuen