1G 1GNT 450cc injectors with Walbro 255

[Winetalon]

hey guys i have a 1g non turbo and recently bought a walbro 255lph and i just wanted to know if i can use this walbro 255lph with 450cc injectors in my car??.I have an apexi safc 2 right now installed in my car and i know i need a fuel pressure regulator with the walbro 255lph as i seen.

 

[92AWDHX40]

if its a lp no but the hp one high pressure you would, at least thats what i got into. whydo you need a bigger injectors and a fuel pump in your non turbo. it seems you would be running rich>

 

[Winetalon]

it is because im upgrading to turbo soon.but i just wanted to know if i can use it because i have seen that the nt stock pressure is at 47-50psi.Also i have the safc that it can help me in controlling if im running rich or not,right?.The walbro is the gss342 its hp-high pressure

 

[92AWDHX40]

you can use that 450s are good wally fine too, I use the maft but you shofuldnt have problems with your fuel system.

 

[ramsack]

You will overrun the regulator and ruin it. It may not be noticeable at first and just be overrun by a few psi, but give it a few months and it will be almost twice the psi. 450s are plenty depending on goals, and are detuned to ~380-390 by them running the 1g turbo fpr 7-8 psi lower than what injectors are always rated for. You will want to run 43.5 psi which is 3 bar.

 

[Winetalon]

you can use that 450s are good wally fine too, I use the maft but you shofuldnt have problems with your fuel system.

oh ok! thats great! do you think i should get an afpr or install the walbro and the 450cc with the stock nt regulator that is at 47-50psi? should i go with afpr then?

 

[streetillEagle]

Get the turbo and install all at the same time. Why double step an install. and get the Afpr too. Although your stock regulator runs higher psi it's not adjustable. Hope your turbo build goes well.

 

[DSMvroom]

I would argue that even an LP might require a new regulator, but that's just conjecture.

To answer OP's original question, you should be able to use whatever size injectors you want with whatever capacity fuel pump. The key player in the mix is a properly adjusted FPR. Although an underpowered fuel pump will never be able to supply large injectors no matter what you do to the FPR.

 

[Winetalon]

Yea! i'll get an afpr with it.this car stock pressure is 47-50psi.how much should i raise the afpr psi with the 450cc injectors and the walbro 255 pump?

 

[ramsack]

I wouldn't turbo it without a turbo ecu and harness. You're setting yourself up for disaster if you don't have a way to tune, or rather even a good base to start from. You won't know if you have knock, too. In that case to answer your question, with what I recommended you would be lowering it.

 

[TenSecondSTi]

Why not go with a 190lph that's more then enough to run 450's even evo 560cc injectors. On ether FPR but I'd go with a 2g at 42psi that's perfect. should be enough for the 14b and possibly a 16g depending the boost set by the user. the evo 560's are perfect for a 16g with the above mentioned part's.

 

[Winetalon]

I wouldn't turbo it without a turbo ecu and harness. You're setting yourself up for disaster if you don't have a way to tune, or rather even a good base to start from. You won't know if you have knock, too. In that case to answer your question, with what I recommended you would be lowering it.

I will be using an apexi safc 2 to tune it.

 

[ramsack]

Not a good way to do it, but i'm sure you are set on this method. I hope you know what you're doing. There will be no knock control of any sort. I don't even see how this is going to work. It's feasible for people starting with a turbo ECU this way, but to boost on a non-turbo ecu, you may think you have good results until you melt a hole a piston.

 

[SpawnedX]

Just use a turbo ECU and SAFC.

 

[Winetalon]

If i use a pocketlogger couldn't i see the knock issue with my car?

 

[SpawnedX]

The real question you need to ask yourself is, why risk it?

 

[92AWDHX40]

I would get the stuff first, i turboed my dsm it took a bit to get all the parts, butwell worth the wait, i got my 255 for long term use. More horsepower and fuel down the line.

 

[ramsack]

If i use a pocketlogger couldn't i see the knock issue with my car?

Nope. The non-turbo cars have nothing related to knock-sensing. Not even the same place on the block for the sensor to thread into. The non-turbo ECU doesn't have the DSP circuitry for knock listening or timing control.

 

[LKWTSI]

Nope. The non-turbo cars have nothing related to knock-sensing. Not even the same place on the block for the sensor to thread into. The non-turbo ECU doesn't have the DSP circuitry for knock listening or timing control.

Pardon me for jumping in on this, but this quote really surprised me. I just got done scrapping a rebuild project on what I was led to believe was a non-turbo block, becuase it didn't have the oil injectors in it. Strange thing is the block had the threaded hole in exactly the same place on my old turbo block. So is there something I missed, as I'd like to sell the block if I could knowing it was in fact a turbo block after all.

 

[SpawnedX]

All 4G63 blocks have the knock sensor location in the same location, even the 4G64 has a casting mark for it, but it needs to be tapped.

 

[ramsack]

It is VERY rare to find a non-turbo 4g63 with even a casting there for a knock sensor. When I had my intake manifold off there was nothing there. Not even to drill and tap. If there would have been, I would have done so

 

[Winetalon]

ok! i'll get the turbo ecu but i have a question the 7th wire from the maf goes to pin number 6?? that pins is already used.I have a diagram of the two ecus with the pin numbers and what is connected into it.As i look i see the pin numbre 9 is the detonation sensor and in my ecu is empty but the pin number 6 its not? what can i do when running the 7th wire from maf back to the ecu?

 

[ramsack]

This is why it would be easier to get a harness. The turbo MAF uses 8 pins vs. the non-turbo's 6. Extra wire is for MAF Reset.

 

[Winetalon]

This is why it would be easier to get a harness. The turbo MAF uses 8 pins vs. the non-turbo's 6. Extra wire is for MAF Reset.

are you sure? ive seen it uses only 7th pins.I just had a turbo maf yesterday and i saw the plug.

 

[ramsack]

The connector has 8 positions, only 7 of them are used.