Post up your stand alone fuel systems!
02-14-2013, 07:22 AM
#12
Why do you have a stand alone on a plate? I see so many guys running 250 off the rail and saying that is about the maxx a plate will support.
I can only guess you like having higher octane to be extra safe when spraying? Just trying to learn from your set up.
I can only guess you like having higher octane to be extra safe when spraying? Just trying to learn from your set up.
02-14-2013, 08:46 AM
#13
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I'm gonna run stand alone and a plate so I can spray with out any fears of fuel pressure changes in the rail, period... I had a 255lph pump leave me stranded and went back to a Delco pump. All it has to worry about is my rail and I like it that way. The standalone system will give you a more accurate and consistent fuel pressure and be safer while spraying, especially with 110 or c16 as fuel. It's just how you roll if you wanna be gansta... 
02-14-2013, 09:30 AM
#14
alot of guys use a standalone to help dial in a/f ratio. Instead of swapping and buying smaller or larger jets, u can just simple just down the fuel pressure or raise it. U can have a more accurate setup that is more consistent.
Another reason is efi usually runs off 53-60psi fuel pressure. Some people like to run a lower psi which i think is what phantom is running. Something like for a carb around 5-8psi fuel pressure.
I will have my setup back installed by this weekend so i will post some pics thin.
Another reason is efi usually runs off 53-60psi fuel pressure. Some people like to run a lower psi which i think is what phantom is running. Something like for a carb around 5-8psi fuel pressure.
I will have my setup back installed by this weekend so i will post some pics thin.
02-14-2013, 11:36 AM
#16
There comes a point when using nitrous when just changing jets(which is all you can do when pulling fuel off the rail)isn't enough. I've run as much as a 250 shot off the rail. It was in between being too lean with one jet and too rich with another. With a separate fuel system you can fine tune your nitrous to fuel ratio. Instead of changing jets, you can raise or lower the fuel pressure to really dial in the tune-up.
For instance. Last time we had Tylers^^^ truck on the dyno, I started out with 6# of fuel pressure. It made 661rwhp. The next pull I lowered it to 5.5# of fuel pressure and added .5* of timing. It made 666rwhp
. Third pull lowered the fuel pressure to 5#, left the timing alone and it made 681rwhp. Gained 20rwhp from the first pull to the third without changing jets, just fine tuning the fuel pressure.
It also lets you run better gas for the nitrous enrichment instead of wasting $10-20/gallon fuel in your regular tank. Also, try not to think of it as being able to add more timing just because you have good fuel in there. Timing can ruin your day in a hurry. Think of it as making your existing tune-up even safer. Make some pulls on a dyno, the street, the track, whatever, on fresh plugs and see if you can add timing then. For instance...I ran a .073 nitrous jet and made 230 more horsepower to the wheels using 91 octane pump gas pulling the fuel from the rail, using 20* of timing. The plugs looked "warm"(border line to too much timing). When I put my separate cell in for nitrous I started using c23 fuel. It made the plug look a little more happy but I still pulled more timing out just to be safe.
DISCLAIMER: I am not responsible for you blowing your **** up by using any of these numbers as a reference point for your own setup.
For instance. Last time we had Tylers^^^ truck on the dyno, I started out with 6# of fuel pressure. It made 661rwhp. The next pull I lowered it to 5.5# of fuel pressure and added .5* of timing. It made 666rwhp
. Third pull lowered the fuel pressure to 5#, left the timing alone and it made 681rwhp. Gained 20rwhp from the first pull to the third without changing jets, just fine tuning the fuel pressure.It also lets you run better gas for the nitrous enrichment instead of wasting $10-20/gallon fuel in your regular tank. Also, try not to think of it as being able to add more timing just because you have good fuel in there. Timing can ruin your day in a hurry. Think of it as making your existing tune-up even safer. Make some pulls on a dyno, the street, the track, whatever, on fresh plugs and see if you can add timing then. For instance...I ran a .073 nitrous jet and made 230 more horsepower to the wheels using 91 octane pump gas pulling the fuel from the rail, using 20* of timing. The plugs looked "warm"(border line to too much timing). When I put my separate cell in for nitrous I started using c23 fuel. It made the plug look a little more happy but I still pulled more timing out just to be safe.
DISCLAIMER: I am not responsible for you blowing your **** up by using any of these numbers as a reference point for your own setup.
02-14-2013, 01:27 PM
#18
Good info. I'm going to order a 1 gallon cell from atech and start building a nitrous system. Keep the pics coming boys
Do you guys think the holley blue is enough pump with the dedicated system and a 250 shot?
Do you guys think the holley blue is enough pump with the dedicated system and a 250 shot?
Last edited by oakley6575; 02-14-2013 at 01:39 PM.