fuel rail?

[k20pr]

is this a good fuel rail ?? http://cgi.ebay.com/ebaymotors/Honda-Acura-K20-K24-Fuel-Rail-RSX-Civic-Si-/260621252413?pt=Motors_Car_Truck_Parts_Accessories&hash=item3cae3cb73d#ht_500wt_749

[Ba82Ep3]

Is there something wrong with your stock rail?

[RHCP0801]

stock rail is fine for a lot of hp, most people (like me) get them for looks, but I also got a great deal on it so that was another reason

[k20pr]

I got it for 50 buck... soo i bought it

[k20pr]

im going boost now.

[RHCP0801]

probably still wont make enough power to need it

[k20pr]

ohh well! hahahaha

[monjarassi]

I've heard many bad things of that rail.

[k20pr]

I only want something better that the oem. lol

[StockTexasEP3]

Fuel rail doesn't add HP, does it? What exactly is the point of adding one.. (noob here ><)

[sippyyy]

so you can push more fuel into the mix (to keep up with forced induction)

[Blah1219]

Usually its for bling. Not many people are pushing the high enough ponies to use for what it was intended for. But it sure gives the engine bay alittle color.

[andyman97]

Compare how thin the oem rail is to a nice hr or ktuned rail. If you're boosting, you can never have too much fuel available.

[Blah1219]

Compare how thin the oem rail is to a nice hr or ktuned rail. If you're boosting, you can never have too much fuel available.

Unless you want to run rich all day and back fire, then alright!

[RHCP0801]

doesn't matter how thick the fuel rail is, it all determines what size the injectors are

[urthworm]

I had that rail on my car when it was boosted.. i was running a return line, it worked just fine.

[andyman97]

Unless you want to run rich all day and back fire, then alright!
Yeah, because kpro doesn't allow you to actually tune fuel or anything! And last I checked, larger fuel rails don't affect duty cycle or pressure.

It's fuel on demand, Adam. It's the same reason people run small tanks between the pump and the rail.

It's also the reason you run bigger fuel lines as opposed to the stock line. It's more than injector size, it's pressure and volume.

[AKEP]

i was being told that people make return style fuel systems on the k series to lower duty cycle (longer injector pulse?) so they up the pressure (since our regulator is in the tank before the rail) and can deliver more fuel with injectors they arleady have. we're still seeing 500hp figures +/- with 600cc injectors on 91 though, instead of 350-ish with stock rail (non-return).

so yeah its bling unless you make a return style fuel rail out of it. nothign wrong with bling.

[freeme62410]

So is it not bad to run a walbro 255 without a return line and aftermarket fpr? All that extra pressure could ruin the injectors right? I was reading this diy ( http://honda-tech.com/showthread.php?t=2905850) and they explain that it is important if you're running boost. I have jrsc with walbro and no return now and I've already had issues with the stock regulator...what to do?

i was being told that people make return style fuel systems on the k series to lower duty cycle (longer injector pulse?) so they up the pressure (since our regulator is in the tank before the rail) and can deliver more fuel with injectors they arleady have. we're still seeing 500hp figures +/- with 600cc injectors on 91 though, instead of 350-ish with stock rail (non-return).

so yeah its bling unless you make a return style fuel rail out of it. nothign wrong with bling.

[AKEP]

you can only run so much boost with our stock setup, the lines are tiny and restricted, so we have the pressure, but the flow isn't there. the system starts to lose pressure instead of holding it while delivering more fuel, so fuel demand at so-many-hp is beyond the flow capacity of the entire system. a walbro might help, but your still trying to stuff all this fuel into a tiny little hole and then across the car where you're probably pushing twice the amount of fuel the car was designed to use. without a return style system, you will run massive injectors which would up the duty cycle exponentially to keep up with high boost demands on a stock rail/system. This is where I am right now, I have 600's i don't want to throw away and im looking to push a lot more power now, need to upgrade the rest of the fuel system to keep up with flow.

[freeme62410]

Ok so is it safe to run just 8 psi on the stock system with 440cc, or do I risk harming the injectors due to high duty cycle? My fear is a failed injector during boost and melting a piston or something. I emailed K tuned to see if they could put something together for the ep.

you can only run so much boost with our stock setup, the lines are tiny and restricted, so we have the pressure, but the flow isn't there. the system starts to lose pressure instead of holding it while delivering more fuel, so fuel demand at so-many-hp is beyond the flow capacity of the entire system. a walbro might help, but your still trying to stuff all this fuel into a tiny little hole and then across the car where you're probably pushing twice the amount of fuel the car was designed to use. without a return style system, you will run massive injectors which would up the duty cycle exponentially to keep up with high boost demands on a stock rail/system. This is where I am right now, I have 600's i don't want to throw away and im looking to push a lot more power now, need to upgrade the rest of the fuel system to keep up with flow.