giangi

I'm going to put my new engine on the car, it's a 4G64 2.2 long rod, with race head, twin scroll GTX4294R turbo on Shearer manifold, HKS Kansai intake manifold twin rail with 8 injectors, and i'm planning of using E98 fuel only, and the ecu is a series 2 AEM 30-6313 ( when they start to ship them....).
I have some doubts about injectors choice, my starting idea was about 4 fic 1150 cc as primaries, driven from the ecu without resistors, as the series 2 aem has 6 peak and hold drivers, and 4 fic 1600 cc Bosch old style as staged, driven by a AEM or FJO p/h box, i just have these injectors, but now, looking at new EV14 Bosch injectors generation i have the idea that a set of high impedance 1000 cc as primaries and a set of 2000 cc, always high impedance, as staged, would be a better choice, i would need some opinions about this, and, important thing, is the choice 1150 + 1600 enough for my fuel flow needs ( as fuel ssytem i have a Walbro 255 lh intank that feeds a sump with 2 x 044 bosch pumps, all AN8 size )
Thanks in advance for help.....
Gianluca.

awd2gen

iTrader: (4)

Go with the Injector Dynamics ID2000's or FIC 2150cc. You will only need 4. They will do the job just fine. The are high impedance so you wont use resistor pack.

giangi

I've read great things about those injectors, but will they be enough for my power goals, considering that i'm going to use straight methanol? I suspect that at 900/1000 hp with this fuel they will be a little at their limit, using only 4, but i could always take them for the second rail, and keeping the 1150 as primaries, or i could change these, too, using bosch 1000 high impedance also for the primaries..... I'm a little confused.....

Ted B

iTrader: (6)

E98 and straight methanol are two different things. E98 is almost straight ethanol. Methanol is different, and has different stoichiometry and fuel system requirements. Which are you using?

Also, forget the old Bosch 1600cc pintle injectors regardless. They are obsolete.

giangi

It's straight methanol, its denomination, where i can source it, is anydrous 99.9% ethanol, so the options, being the 1600's obsolete, is between 1000 + 2000 high impedance or the fic 1150 cc, that i just have, plus the 2000 high impedance? Which choice is better?

Ted B

iTrader: (6)

This is confusing. Is it ethanol or is it methanol? They are different!

Let us be clear on this first, and then we can talk about pumps, fuel lines, and everything else.

giangi

Talking about ethanol, i can source it pure, but i could always mix it with some gasoline, if using it alone can cause some problems... Btw i know about start problems with cold weather, but the car is not for road use, so i was thinking that straight ethanol is a better fuel, isn't it?

giangi

Excuse me for the typing error, it's ethanol, sorry, not methanol.....

Ted B

iTrader: (6)

Ok!

Let us take a look at the fuel pump situation with 100% ethanol. You should plan to require around 0.35kg/hr of ethanol per hp.

A single Walbro 255lph pump, at 14V gives around 280lph at a head pressure of 2.7 bar. You WILL need to have upgraded power and ground wiring to the pump to get 14V under load. 280lph is about 221kg ethanol (0.79g/l). That is only enough to support about 632bhp, so it will not be enough, not even for a sump pump. You should think about two in-tank pumps in parallel. That should give you enough power to do what you want, as long as the base fuel pressure is kept moderate (e.g. ~3 bar).

If you want a higher pressure system (as the Injector Dynamics guys like), you will need to keep those dual inline Bosch pumps. Otherwise, you probably do not need them.

As for the injectors, a set of 2000 or 2150cc should be enough. 2000cc/min = 1.58kg/min ethanol, which is 95kg/hr * 4 cylinders, which should be enough for around 1085 bhp. If you keep the Bosch pumps and up the base pressure to around 4 bar, that should give you enough fuel for 1000whp.

I made these calculations off the top of my head, so feel free to check them, but I believe them to be accurate.

giangi

Thank you very much for help, much appreciated.... So, assuming to use a dual pumper inside the tank, with 4 2200 cc injectors i should be ok, but, as i just have built the dual rail system, ( and the fuel lines, too.... ), wanting to keep the 8 injectors option could i use the fic 1150 cc i just have as primaries, or it is better to swap them too, in favor of a set of ev14 high impedance 1000 cc?
One last thing, in my fuel system i did a sump tank of about 2 gallons capacity, and the return line comes into it, is it correct or i have to reroute the return back to the main tank?

tiffsevo

iTrader: (5)

i would 1200 cant wrong with them, and of course they should be precisions !

Ted B

iTrader: (6)

I would never want to complicate things more than necessary, but that is just me. The beauty of the newer 2000cc injectors is they eliminate the expense, hassle, and complexity of multi injector setups. If you feel you must use 8 injectors, you have choices to make.

If you are using the factory tank, the pressure of the return line is necessary to suck fuel from one side of the tank to the other. If you eliminate that, only one half of the tank will be functional. If you are using a race fuel tank it does not matter.

giangi

Read and understood, everything clear........
Thank you very much for everything....