have any of you removed the regulator and used a fitting like used on the other side. dual feeds , drilled each injector hole through to back chamber, Then just use the crossover ports fed into a firewall mounted regulator? seems like a simpler setup.

I know the design was an attempt to keep things light, compact, and visually appealing.. but the rails are dual chambered. and the crossover from the left to right is not even 1/4" I.D. not very practical for a boosted setup, or anything running a larger injector than 42. and the restrictions within the rails could cause flow issues. I wonder if these restrictions play a role in some of the distribution problems these intakes have at over 650 hp when using boost?

 

The rails can be gundrilled from the rear then welded shut. I use a -8 line in, welded -6 fittings and my own crossover while keeping the pressure regulator as supplied with a -6 return.



this was inadequate for supply in high flow situations



gun drill both rails through here and weldemup



the -6 fittings are welded onto the rails here and fed across to the front of both rails



this application has supported 50#ers at sustained w/o throttle

 

Very nicely done. Actually it seems like serious overkill. But very very nicely done!

 

I've heard that the rails without mods will support high flow injectors, but volume is something that has a stabilizing effect on pressure, especially in high flow situations.

 

The weird thing is tpis used a pretty complex/expensive rail extrusion with dual passages in each. And the net result was flow problems, and lack of volume. Not saying it is junk, or inferior quality. Just a really weird setup.

 

Exactly the problem. The weird divider, 1/4" passage holes, etc.

I ended up going with LT1 rails, and I just paralel fed them. They bolt up to the miniram just fine, and they have the better style injector clips.

 

Saw a 93 vette yesterday that had a miniram on it, universal sbc rails and were held in place off of brackets that bolt between each pair of injectors. Super simple, super cheap, and both ends of each rail had -8 male flare ends on them. I ordered a couple lengths of racing parts solutions "Big Dawg" dash 10 rails off ebay for 24 bucks each, and 2 dash 8 an fittings for feed and return. And two dash 6 for crossover. Much simpler and cleaner setup. Pictures soon.