Hello everybody. I have a 10ae, check sig. My car is very close to being done. The next step is fuel system setup. My car should make some where between 300-350hp. Ive heard alot of stories from people about the fuel system. Most of its been about how it is setup and that it can cause it to run lean or bla bla bla. Im not too smart about it when it comes to the fuel system. My question is...


Use s4 t2 oem rails with new oem fpr, and pd banjo bolt mod
Walbro 255 pump, RC 550cc prim, Bosch 1680cc secondaries.


Or use this setup



Or use a totally different setup then those 2^?

Also the injectors I have were ordered for a fc, and they dont seem to fit the rails like the stock ones do. Do I have to change the rubber inserts or o-rings or whats the deal?

I would like for people to reply that actually know what they are talking about. Thanks

 

the bosch 1680 are usually ford injectors, u will have to modify them to fit the stock fuel rail. as long as ur fuel lines are good, just stick with your first option. if ur looking for high hp numbers the second option (which i have) will be more costly, but u wont have to worry about the PD.

 

Do you have pics or part #s of the injectors your trying to use? But yea.. if theyre 1680cc youll have to take a drill press to your stock fuel rails if you want them to fit.

The second option helps with fuel starvation if your running high HP. Its also more costly.

 

whats considered high HP though?

 

400+

 

Yea the stock FPR is good to about that much HP.. Some people say more then that.. Just to make myself feel better, I put my SX FPR on so I wouldnt have to do things twice..

 

To be safe, I would get an aftermarket FPR for anything over 300whp, but then again, I like to overkill things.

 

You don't need an aftermarket FPR.

You also don't need to do anything fancy with the fuel setup. The Walbro pump will support what you want to do easily.

For 300HP, the 1600CC secondaries are WAY TOO HUGE and your primaries are too small. Use 720CC or 780CC primaries, and 1000CC secondaries as a starting point. That's PLENTY of fuel for your power goals.

What standalone are you running?

 

And how does an aftermarket FPR make you safer?

 

Because for 300whp I'd be running a parallel fuel system anyways, making it a necessity.


You must have missed this part huh. ^

 

So it's not actually the FPR that makes you safer, which is what you implied. Just making sure you don't give anyone the wrong idea.

 

Haltech e6s


So get different injectors then? Or are you saying I will run too rich?

 

Sorry for the misunderstanding.


If you have a standalone, you can run 4x2500cc injectors (very crude example) and be just fine. It all depends on the tuning. Essentially, you could run any injector you wanted. Better to be over than under. Unless you're on "The Price Is Right".

For your goals, I would run 720 (maybe 850)cc primaries, and 1000cc secondaries. That'll be more fuel than you'll ever need with 300whp.

 

but if you already have the 1600 and cant return them, you dont drill out the rails. the injectors need to be machined down a little to fit the stock rails. and when i say machined its just the plastic part around the top. ask kieth at KGparts.com he can do it for you.

then again, if you dont plan on ever changing ur system after this, then sell those 1600s and get some 720/1000cc as mentioned above.

 

I would suggest using either 550CC primary and 1000CC secondary, or 680CC primary and 1000CC secondary as a starting point. That's plenty of fuel. I always suggest a larger primary because there's a chance of running the primaries out of fuel before the secondaries come online but because you have a standalone that's not an issue (you can set the stage point). So the 550CC units are fine and will make tuning the light load areas of the map a lot easier.

No, that's not true at all. You can only run an injector down to a certain pulsewidth, between 1.2 and 2ms for most injectors. Even a such low pulsewidths the large injectors will be firing in too much fuel. About the biggest primaries that you would want to run are 1600CC and even then you're going to need to make sure that fuel pressure at idle is low in order to get reasonable injector times.

 

is the plumbing on that picture correct?
i am actualy in the process of installing my fuel set up but didnt realy know how the fuel presssure regulator neede to be plumbed.

i have pri+sec kg fuel rails,4 precision 880cc injectors and aem FPR
does any one have any other plumbing pictures

 

yeah im also lookin for more pics of the plumbing...lol