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Help Explaining Whats Needed For Fuel Rail And Injector Install

ausdrift

By ausdrift,
in Engines & Forced Induction

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ausdrift Experienced

ausdrift

Posted
Posted

Im looking at getting upgraded injectors for my r33 gts-t and it looks like ill need top feed ones and im going with id brand, either 720? Or 850s. Thing is i dont know much about fuel rails and injector installs. Ill get a shop to fit, but can someone explain a bit about whats needed, sizes and how it fits together? I hear id need short version injectors for rb25det etc...

And with a fuel rail, id buy the rail, but does that just bolt on generally, to the oem hoses and parts etc? Do i need to buy additional parts, etc?

Thanks

kingtube69 Experienced

kingtube69

Posted
Posted

Go to scottys customs website and have a look. He has a conversion kit all you need is the short injectors!

All there all done for you. You could even email him or find him on Facebook and message him about it.

He's been a great help to me but because I want the stock look I'm going Nismo 740CC

kingtube69 Experienced

kingtube69

Posted
Posted

I've been following your posts for ages now! I'm using your fuel pump guide next week :)

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

hhahahaa sweet man!

Yeah, hit up Scotty - he has all the parts and I've measured out all the spacers for him already so he knows exactly what to supply based on what application

GTSBoy Grand Master

GTSBoy

Posted
Posted

And whats the deal with fuel pressure regulators? Why/when is this needed?

Usually not needed. You have two main reasons to need one.

1) You are living in the early 1990s and you cannot buy bigger injectors or better engine management. The only way to get more fuel into your engine is to bump up the pressure.

2) You are fitting an aftermarket fuel rail and cannot put your OEM regulator onto it. Ergo you have to buy a reg that will fit.

For most people the OEM reg is able to flow enough return fuel for quite large fuel pump upgrades without losing control of the fuel pressure. Once you get past that point THEN you have a really good reason to buy an aftermarket reg.

femno Grand Master

femno

Posted
Posted

How much power do you need to support? Drop in a set of S15 injectors? Would be plenty for a hi-flow turbo.

If not just go Nismo 740cc or any other drop ins you can get your hands on.

Then no need for cop-attracting fuel rail, fancy hosing or aftermarket reg to over complicate things.

kingtube69 Experienced

kingtube69

Posted
Posted

How much power do you need to support? Drop in a set of S15 injectors? Would be plenty for a hi-flow turbo.

If not just go Nismo 740cc or any other drop ins you can get your hands on.

Then no need for cop-attracting fuel rail, fancy hosing or aftermarket reg to over complicate things.

This is the reason I'm going 740s :)

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