I need to build a fuel system for my 93 LT1. My basic plan is to use an Aeromotive A-1000 pump with a sumped stock tank. -10 out of the sump into a 100 micron filter and then into the pump. From the pump it will then go into -10 line and a 10 micron filter. Then I figured I could run a Y fitting that goes from -10 to 2 -8 lines up to the 4 port regulator up front. Then I assume that I can just buy some modified fuel rails. I plan on running 36 lb injectors. The motor is a solid roller 396 which I hope will dyno in the 500 rwhp range. I then plan to run a 200 wet shot on a TNT F-2 kit. I want this system to be able to support the motor and nitrous together @ 45 psi throughout the rpm range. Any suggestions or does this look good?

 

That pump is just "OK" IMO. In a Nitrous car you really need to "over pump" because you're looking to keep any pressure variations (including initial system engagement) to the utmost minimum.

Think of a River and a Dam. The Dam is closed theres plenty of pressure so to speak. Once the dam opens the pressure drops drastically. This making sense?

The Aeromotive pumps are pretty reasonably priced, but if at all possible I'd get the Eliminator, the Pro Series Pump, or better yet a Weldon. You can find Weldon 2025 or 2035s used on eBay or from the Mustang boards from time to time for a reasonable price.

Normally you'll want direct pump pressure on the rails with the regulator coming after the rails. Easiest way IMO, would be to use a Y-Block, and to have one line going in one rails, crossover and come out the other then go into the regulator (Like factory). Then have the other line go to a RETURN style regulator for the Nitrous System Enrichment.

Even better would be a "Y" with 3 outlets, one going to each rail, then another to the Nitrous System. The possibilities are endless. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

Also, at 500rwhp I doubt you'll have enough fuel w/ 36# injectors at only 45psi. More fuel pressure or More Injector will probably be needed.

Good luck!

 

This is the exact scenario I am in. I think that it is better and cheaper at this stage to just run an auxillary fuel system for the spray. I am around 480rw (will be 500+rw after this winter) and am on 42# injectors, stock lines, and a 255lph intank pump. I too am planning on ~200 shot, and am pretty sure that I am going to just use a 1 gallon fuel cell, BG pump, etc.. for the spray.

Jason

 

That is an option that I had thought of, but I didn't really want to run a separate fuel system. I like the idea of running a 3 way fuel block with two going into the rails and 1 going into the nitrous fuel solenoid. Does anyone make a 3 way splitter? As far as injectors go I figured that 36 lb would be enough. I guess that I could look into 42s but I was concerned with idle quality using the stock 93 computer

 

Product Engineering Has Y-Blocks in practically any configuration you'll need.

http://www.producteng.com/y-blocks.htm

PE 6100 = 10x8x8x8
and 2 of
PE 3018 = 8ANx8AN Fittings (Rails)
and 1 of
PE 3017 = 8ANx6AN Fitting (Nitrous)

Good luck!

Kurtis

 

Wow. That is exactly what I was looking for Kurtis! Thanks. If I was to look into Weldon pumps which one would be the best. Will they burn up with limited street driving? Do they require some sort of pump controller for street use?

 

Wow. That is exactly what I was looking for Kurtis! Thanks. If I was to look into Weldon pumps which one would be the best. Will they burn up with limited street driving? Do they require some sort of pump controller for street use?

 

Just as a comparison, my old 383 made 451rwhp with 30lb injectors 43psi fp, and 255 walbro pump.

Have you considered running dual intank pumps?

I'm using two 255lph walbros intank, with 42lb injectors at 58psi base (so basically 49lb hr injectors), and I've still got room to play at 634 rwhp and 11-1 A/F ratio.

 

I have considered dual intank pumps, but are you still using stock lines? I want to build a fuel system that will support future needs as well with only injector and calibration changes. Basicly I would like to see no pressure drop{or vey little} when I open the fuel solenoid jetted for a 200 shot.

 

Stock lines from the fuel filter to the engine. I've been told they are good to at least 700rwhp.

Though I havn't found out for myself (yet).

 

The stock lines will support 700+rwhp. It's all about fuel pressure and thats where the tuning comes in. If you can keep your peak fuel pressure low and stable with big injectors and tuning than you can get away with the stock lines all day. Seen a car with 750 rwhp on the boost using the stock lines and it never faltered. This car was using the F.A.S.T. setup as I don't think the stock computer is up to the task. I'm not sure about the 93's but since they are speed density the stock computer may be tuned to work.

 

A friend of mine (Rich Krause) is making 733rwhp/845rwtq with stock lines and a single intank pump. Dual intank is a good way to go as well.

Jason