how much horsepower is ok before you need to upgrade your fuel rail. i dont see too many people with them so im guessing its not needed with a smaller build.

 

+1 would like to know

 

I am running a oem rail because when i was doing my fuel setup I couldnt afford a rail. I really want the inlinePro rail which ill get soon.

I would recomend getting a aftermarket one if you want to make some power. I was watching fuel pressure while i was on the dyno. You cant do that while driving on most cars. its a small price to pay. the oem is pretty small.

 

You can get more out of the rail if you balance the flow across the rail. By this I mean that you make sure that all the injectors see the same pressure and there is not a dead spot. If you notice #4 cylinder, the farthest to the rear, may get starved of fuel if it gets bypassed by the regulator. I have had this happen on some domestic cars, so I was going to add inlets to each end of the stock rail but decided to get the IP instead of trying to make the factory rail work. If you have more than enough fuel, overfeed configuration, you can also setup the fuel rail so it enters the front and exits the rear.

 

I think the real question is, at what power level do I need a better fuel rail?

 

thats what im asking, i guess it cant hurt to have one at any boost level.

 

The only thing it hurts is your bank balance.

The OEM one is good to at least 400hp. Anyone know different?

 

Well Rob I believe is still using his OE fuel rail and he made 772 recently. I bout the BDL fuel stuff from Law a while back for the sheer fact it looks "baller" as hell . The stock one will work fine for you at several hundred but I think Ya at InlinePro would be able to give you a much more precise number

 

like i said i had no issues at 772whp. the inlinepro is much nicer though!