Will my fuel system support Nitrous?
Thread Starter
Pro
Joined: Jul 2011
Posts: 707
Likes: 55
Will my fuel system support Nitrous?
I'm running a Procharged LT1 (forged internals) with an MTI low-side fuel pump. At 6400RPM full throttle and full boost my low pressure fuel rail is reading 82PSI. Can I run a 50 shot from the low pressure rail?
Le Mans Master
Joined: Aug 2001
Posts: 6,071
Likes: 297
From: Savannah GA
Cruise-In IV Veteran
I would not feel comfortable with that personally. The MTI is great for bumping up the low side but once you start pulling off the fuel rails it's a different ball game, it's the same as pulling off for port injection. Once you get to that point you're best running a dedicated low-side fuel line -8an min, all the way up the car from the tank. I have -8an feed, -6an return. I would probably do a -8an return if I had to do it over again, just b/c I have a large secondary fuel pump I would want to be sure I can get the fuel back to the tank without any backpressure. I don't have any issues just a personal thing for me since its not a huge difference in money. What's your current boost level? Are you on E85 or ethanol? That would for sure make a difference, you may can get away with a 50 shot if on 93, etc., but I would not do that if you are on ethanol.
A 50 shot isn't much not even sure if that's worth it?? Why not 100? or 75 at least? A lot of work getting all that nitrous on the car for 50 shot doesn't seem worth it to me.
A 50 shot isn't much not even sure if that's worth it?? Why not 100? or 75 at least? A lot of work getting all that nitrous on the car for 50 shot doesn't seem worth it to me.
Thread Starter
Pro
Joined: Jul 2011
Posts: 707
Likes: 55
I would not feel comfortable with that personally. The MTI is great for bumping up the low side but once you start pulling off the fuel rails it's a different ball game, it's the same as pulling off for port injection. Once you get to that point you're best running a dedicated low-side fuel line -8an min, all the way up the car from the tank. I have -8an feed, -6an return. I would probably do a -8an return if I had to do it over again, just b/c I have a large secondary fuel pump I would want to be sure I can get the fuel back to the tank without any backpressure. I don't have any issues just a personal thing for me since its not a huge difference in money. What's your current boost level? Are you on E85 or ethanol? That would for sure make a difference, you may can get away with a 50 shot if on 93, etc., but I would not do that if you are on ethanol.
A 50 shot isn't much not even sure if that's worth it?? Why not 100? or 75 at least? A lot of work getting all that nitrous on the car for 50 shot doesn't seem worth it to me.
A 50 shot isn't much not even sure if that's worth it?? Why not 100? or 75 at least? A lot of work getting all that nitrous on the car for 50 shot doesn't seem worth it to me.
Current boost level is 17psi, but it was originally 22psi before I added a lot of breathing mods (2" long tubes, long runner sheet metal intake, 95mm TB, ported heads) and dropped the CR to 10.7:1. I'm running 93 with a big dose of 100% meth.
In all honesty a large part of the reason why I want nitrous is just for shows as the car is just as much show as it is go. But I don't want them hooked up to just a purge or intercooler spraybar, I want them to actually be functional. Of course the more power the better, but I figured 50whp is a conservative goal.
