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Old 04-25-2005, 00:20   #1 (permalink)
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Turbo fuel systems.

G'day all. My problem is with my EA turbo setup. I've got 360cc magna/hsv injectors that flow 200cc at 3.3bar / 330kpa.I also have an aux injector that flows 380cc at 3.3bar / 330kpa.

I need to fuel a t04 up to about 9psi. If stock pump pressure is 200kpa and the rail pressure is 35psi , would changing the pump to say bosch 044 which is 5.0bar / 500kpa operating pressure affect the value on the injectors to 5 bar

360cc injector flows 200cc at 3.3 bar
260cc at 4.4 ???
320cc at 5.5 ???
maxed at 360cc??
Is this how it works or do i need a pump that operates at 3 bar rather than 5
Would adding the 044 double rail pressure or would the reg fix that?

Can someone help sort out thie fuel calculations. What rising rate regulator would i need?
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Old 04-25-2005, 01:40   #2 (permalink)
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Re: Turbo fuel systems.

Um a few things are not quite right..Fords std fuel presure is around as you said 35 to 38Lb [as in V8's]...My maths say std fuel pressure is just over 2 bar...That would drop the flow of those injectors..So you'll need to raise f/pressure above what Ford designed there rails to take..I guess the pipes will be o/k but I'd be alittle concerned with the flex joints etc....I think you'll find those injectors flow 20 to 24 at 35 lb...Yes the 044 pump will work but its the fuel reg that holds that pressure there not the pump..Though the pump will supply 200LpH @ 5 bar...73 Lb...
Personally I'd get better injecters...Malpasi BO18047 or BO 18054 for hi boost...With rising rate regs its hard for ecu to tune the engine as fuel pressure is not constant..Even when at idle it often holds pressure higher.. making it hard to tune...rising rate is a fill in/ cheap way of making it work..Bad on emissions also...
Up to 330 rwkw the Bosch 984 [600 h.p] does o/k...
The 019 is the same as 044 but its an intank pump...M12 1.5 barb...
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Old 04-25-2005, 02:42   #3 (permalink)
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Re: Turbo fuel systems.

Since you are doing it on the cheap stick the fuel reg in a vice and crush it. do it a little at a time then recheck, I would not recomend more than 50psi base pressure. If you need more pressure than that you need bigger injectors.
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Old 04-25-2005, 04:24   #4 (permalink)
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Re: Turbo fuel systems.

A malpasi increases up tp 12 to 1 ratio though...Thats 12 times boost...
so 35Lb std 10 Lb boost=120...+ the 35 =155 line pressure.....F*rkinhi !!!
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Old 04-26-2005, 01:23   #5 (permalink)
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Re: Turbo fuel systems.

If i fit a 2:1 reg and run 10psi , i'd get around 55 at the rail right.
If 5cc =1hp then the injectors can handle 72hp each which is 432hp and at 75% rate , they'll take 324hp total. I'm only after 300hp.

Why are the injectors rated at 360cc (~36lb) if the only work at 200cc@3.3bar?
even at 80% they should be 300cc shouldn't they , as long as the have about 4bar pressure.???????????
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Old 04-26-2005, 01:40   #6 (permalink)
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Re: Turbo fuel systems.

36 @ 40Lb line pressure....Or in Fords case 38Lb line pressure...
Those Mitsi injectors flow that at higher line pressure...Diffrent to most injectors...Go too high line pressure, injectors don't work properly...
Trust me eventually you'll have to get bigger injectors...Hell even the n/a 6's have 24 Lb's from AU on...
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Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..
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Old 04-26-2005, 03:24   #7 (permalink)
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Re: Turbo fuel systems.

Yes, as you increase the pressure behind the injector it will pass more fuel once open. BUT the pump flow goes down with pressure, so does its life expectancy. Also too much pressure and most factory style will not open properly. An injector actually opens AGAINST the pressure. Injectors start working funny at around 90psi.

A mallapassi costs about $170. 2nd hand blue tops are worth about $90-120 for 8 in good nick. That money would buy some decent 2nd hand injectors. I have seen 6-8 30lbs Ford motorsport injectors range from $100-300.
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Old 04-26-2005, 03:57   #8 (permalink)
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Re: Turbo fuel systems.

I've already got the injectors though , thats the reason i was trying to setup with what i've got. I thought they were 36lb compared to AU (which i got on the BBM when i bought it)

360cc compared to 200cc sounded good at the time. So basically there's no way to set it up efficiently with what i've got.

The turbo is only t04 .60/.82 with intercooler and extra 380cc injector. I don't want to exceed the power the manual box can handle (250kw??).
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Old 04-26-2005, 05:05   #9 (permalink)
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Re: Turbo fuel systems.

Extra injectors and rising rate regs helped contribute to an engine failier on my supercharged setup. They also contributed to a lil fire when the diaphram in the stock pressure reg went.
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Old 04-26-2005, 08:35   #10 (permalink)
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Re: Turbo fuel systems.

Get aftermarket ecu and buy some of these from U.S..They are s/h yes but top stuff..These are what I run...They won't work on std eec though...You can possibly bid him down...They would be worth $1k new here.....
http://www.turbomustangs.com/forums/...threadid=37576
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Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
.
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..
R.I.P Possum...
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