silent running

Got an Aeromotive fuel regulator on the way to me and I'm just working out the plumbing and fittings I need at the moment, but I was thinking, while I'm at it, there must be something I can do to improve/equalise fuel flow. I can see it goes in at the n/s rear injector and then the regulator is on the o/s rear injector (is this number 3?).

Now couldn't I simply reroute things so that the feed to the n/s rail is Y'd off to feed the front end of each rail with a roughly equal length to each? Then the rear ends of each rail will be fed to the two inlet ports of my new regulator and the return outlet functions in the usual way?

Have I just reinvented the wheel here? Just seems a shame to use only one inlet port when I've got a pair of them!

Bob Rawle

Just reverse the flow thro' the rails in std form, reduced egt's and more evenly fueled cylinders the result.

cheers

bob

silent running

That's an interesting idea. Won't you end up with the n/s rear cylinder ever so slightly leaner than the rest instead?

Fuzz

That's what I thought the other day when I posted near enough the same query.
What I havn't yet done is test anything. Actually it was Bob that suggested it last time IIRC.

Im guessing it has something to do with the airflow through the inlet manifold, I vaguely remember some flow bench testing that suggested that the individual ports of the inlet manifold didn't flow the same amount of air.
So one has to also assume that moving the pressure reg to No 4 makes that injector pressure lower to match the lower air flow to that cylinder.

The only downfall to that idea is that liquid is incompressible so the whole injector rail (both sides) "should" be whatever the pressure reg asks for......


How close was that bob


Andy


probably a mile off

Jolly Green Monster

iTrader: (4)

similar to how I have plumbed mine.. although I supply the rear (3 and 4) first with fuel and out to the reg from the front.. probably picture somewhere.. but basically pipe work is equal length (unnecessary in theory as Fuzz mentions as fuel is pressurised, but I like things equal).

I ran with fuel flow reversed through the original fuel rails set up for a while..
Thinking being number 3 is the hottest as nearest the turbo so get fuel to that first to make sure it doesn't drop in pressure etc..

Noticed no difference reversing the flow.. fine tuned via wideband before and no change needed..

Did the parrellel feed along with the new engine so cannot comment on difference it made.

Cannot find a current pic but just refitting engine at the moment and inlet is off.. once on I'll take one etc..

Simon

Jolly Green Monster

iTrader: (4)

taken pictures and will try and post them later.. simon

Jolly Green Monster

iTrader: (4)

http://jollygreenmonster.fotopic.net/p33071215.html

http://jollygreenmonster.fotopic.net/p33071214.html

silent running

LOL I was gonna go with the simple reverse flow, single fuel line approach, but the two parallel fuel paths feeding back to the two inlets on the reg...looks mint, just like it should do.

Bat-Fink

http://bbs.22b.com/cgi-bin/ultimateb...c;f=7;t=001079