OEM fuel system Non-Si vs Si

[AlexSt84]

Hi Guys,

I tried to find the spec numbers of the pumps and injectors, the part numbers are different between both cars.
I wonder if replacing the OEM fuel system on a non-si hatchback with OEM Si one will give the difference. Pressure higher in both pumps, injector size etc.

for note: I live outside of the US, so we don't have any aftermarket options here. I tried to e-mail Eman for quite some time about his fuel system, but he isn't replying.

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[Ap1 George]

You will need the intake cam and the HPFP and the hardline. As far as the injectors go Eman himself told me they flow the same amount between the Si and non Si 1.5t even though they have different part numbers.

 

[AlexSt84]

I understand that replacement needs to take from the fuel tank pump all the way to the injectors. Including the camshaft. For the injectors, Eman's are the only good option?

 

[Ap1 George]

I understand that replacement needs to take from the fuel tank pump all the way to the injectors. Including the camshaft. For the injectors, Eman's are the only good option?

No, not the fuel tank pump, just the pump on the head. As far as injectors all I'm saying is that Eman told me you don't need the Si injectors as they flow the same amount as the non Si.

 

[Precord96FK7]

I wonder if anyone has ever tried to drill the outlet side of the fuel joint hard line like the Type R's to 5/64" with any results. I know the Type R's have been said to benefit a little with no other changes or they do it with the XDI HPFP.

Piecing together parts to do the Si fuel upgrade, and have the Si Intake cam, HPFP, and hard line. Might use the Type R fuel feed joint (larger) and corresponding fuel supply line (larger). But now I'm curious as to drilling the hard line too.

I might also just source the Accord 2.0t HPFP in place of the Si HPFP, but still deciding for now.

 

[JDM importz]

I wonder if anyone has ever tried to drill the outlet side of the fuel joint hard line like the Type R's to 5/64" with any results. I know the Type R's have been said to benefit a little with no other changes or they do it with the XDI HPFP.

Piecing together parts to do the Si fuel upgrade, and have the Si Intake cam, HPFP, and hard line. Might use the Type R fuel feed joint (larger) and corresponding fuel supply line (larger). But now I'm curious as to drilling the hard line too.

I might also just source the Accord 2.0t HPFP in place of the Si HPFP, but still deciding for now.

Will the accord 2.0t hpfp bolt up and gain flow compared to the si ?

 

[Precord96FK7]

The Accord 2.0 HPFP is basically a bolton itself but @MetalKnightCivicHB would be the person with 1st hand knowledge. It looks like the hard fuel line from the Si would work as well with it. It would be a true upgrade increasing fuel pressure for the Injectors vs any of the 1.5t HPFPs.

 

[AlexSt84]

Can you provide the part number for Accord 2.0 HPFP and Type R fuel joint hard line?

Do you think such a combination with Si's other parts will be a better option rather the Eman fuel upgrade?
cause it's not possible to get it when you are outside of the US.

 

[Precord96FK7]

Can you provide the part number for Accord 2.0 HPFP and Type R fuel joint hard line?

Do you think such a combination with Si's other parts will be a better option rather the Eman fuel upgrade?
cause it's not possible to get it when you are outside of the US.

The Accord 2.0t HPFP part #
16790-6b2-a01

The Type-R hard line likely won't fit, the bends are different. It looked like Eman's kit on @MetalKnightCivicHB's was basically a civic Si hard line, couldn't tell if it was drilled out or not.

 

[AlexSt84]

So you suggest to put Si’s: Camshaft, Hard line, injectors, pump in fuel tank, and just hfpf of accord, correct? and it should be upgrade over hatchback?

 

[Precord96FK7]

Ap1George stated the Si and Non-si injectors flow the same, so might be extra money spent for no difference there. Same with the LPFP, I wouldn't spend money on a Si LPFP, I highly doubt there is any difference. I have a Deatchswerks DW300C LPFP, I've seen some others using an AEM LPFP with success also.

 

[MetalKnightCivicHB]

The Accord 2.0t HPFP part #
16790-6b2-a01

The Type-R hard line likely won't fit, the bends are different. It looked like Eman's kit on @MetalKnightCivicHB's was basically a civic Si hard line, couldn't tell if it was drilled out or not.

Right. The supplied hardline I recieved, i couldn't tell if it was drilled out. I still used it.

 

[Precord96FK7]

So I'm working on a few things since I have to swap turbos. Been piecing together all the necessary parts for a Si fuel upgrade with a couple changes. Going to use the FK8 Type-R fuel feed fitting into the Si HPFP it's bigger and a corresponding PTFE PRL Flex Fuel line going from ethanol sensor on the PRL kit to the new FK8 fuel feed fitting. From what I can see it's the same size from the PRL ethanol sensor/flex fuel module all the way vs. reducing in size on the 1.5t fuel feed.

Got the Si HPFP and the Si hard line. I drilled out the hard line on the fuel rail side to 1/16". Haven't heard of anyone doing this, but the 2.0t/FK8's drill their lines to 5/64" for better top end fuel flow so I'm going to try it out.

Should have the intake cam swapped in the next day and just need to wait for my new Vargas GC turbo to get back up and running and re-tune with Phearable.

 

[teletxt]

So I'm working on a few things since I have to swap turbos. Been piecing together all the necessary parts for a Si fuel upgrade with a couple changes. Going to use the FK8 Type-R fuel feed fitting into the Si HPFP it's bigger and a corresponding PTFE PRL Flex Fuel line going from ethanol sensor on the PRL kit to the new FK8 fuel feed fitting. From what I can see it's the same size from the PRL ethanol sensor/flex fuel module all the way vs. reducing in size on the 1.5t fuel feed.

Got the Si HPFP and the Si hard line. I drilled out the hard line on the fuel rail side to 1/16". Haven't heard of anyone doing this, but the 2.0t/FK8's drill their lines to 5/64" for better top end fuel flow so I'm going to try it out.

Should have the intake cam swapped in the next day and just need to wait for my new Vargas GC turbo to get back up and running and re-tune with Phearable.

Hi,

Could you please tell me the part number for the SI hard line?
I can't find a part description with "hard line" name.
Does the SI hpfp and hardline upgrade requires any other parts to replace?

 

[zacwel]

If I'm not mistaken, they are talking about the fuel rail on the backside of the engine under the intake manifold. If you're replacing injectors you might as well replace this anyways bc it's not recommended to reuse it after removal.

P/N: 16011-5AA-305

[2] on this exploded diagram

EDIT: I WAS IN FACT MISTAKEN

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