ACTION JACTION

Ever since these Bosch 1000cc Saturated injectors were introduced, I have been wanting to get them as Im hearing nothing but good things about them. Maybe some of you tuners can help out here.

I am running an aeromotive A1000 fuel pump (Yes, Ive heard good and bad about it) and was wondering what would be the max whp that this combination of fuel pump and injectors are good for, assuming that everything else is up to par. Anyone tuned a setup like this?

Reason I ask is because I know that these bosch injectors require high psi to make good power.

gogetta

Good question. I want to know too, because that is the same setup i have. Got a while before i finish though. Who's got the answer?

boosted hybrid

The a1000 pumps are terrible at high pressures. If you look at the pressure vs flow chart for them, they fall off really hard about 80psi+. I have seen more of them go bad than another other fuel pump, and multiple ones on several cars. To get high base fuel pressures, use the walbro 255lph HP feeding the bosch 044. The bosch 044s are still good around 130-140 psi pressures.

ACTION JACTION

Im really trying to avoid running dual pumps just incase one fails. Im going to be running neptune and I dont think there is a feature to prevent your motor from blowing if fuel pressure takes a dump while in high boost. Unless Im wrong? On the other hand if the A1000 fails, then the car just cuts off. Ive had the A1000 for 3 years now and it runs fine but Ive also known people with it that have had no luck so the A1000 gets mixed reviews from me...lol

Beside those issues, how much power do you think the A1000 can support with these 1000cc saturated injectors?

Shawn C

iTrader: (1)

750whp...give or take lots of stuff like compression, engine, turbo, etc... whats the setup?

96 GSR-T

Neptune does not have this feature, I suggested it and got shot down for it.... If this is a feature you would like to see implemented I suggest you join the support forum and ask for it, I would love to have it and I am sure others would see it useful.

0B R Fittings

iTrader: (3)

If the walboro was to fail you would still have the bosch pump feeding the engine, and if the bosch was to fail you would have the walboro feeding. And I've never seen or heard of a bosch 044 failing, their really good fuel pumps.

boosted hybrid

I went through 3 a1000 pumps in a week span on FR Geoff's civic. No idea why. No debris, both filters clean and running a dedicated 14 volt source with relay to the pump. I have had other customers go through 2 of them until switching out to the Bosch 044's.

With 70 psi base fuel pressure i made 750whp on RC 1000cc's with the a1000, but the fuel pressure was dropping off around 100psi peak pressure back to 80 psi by 10k. Ran correct line size, pre/post filter size, dedicated 14 volt source with no voltage drop. Regardless of the dyno numbers the power was good for 154mph in a 2500 lb car.

ACTION JACTION

Maybe in the future, Neptune will have this feature. One can only hope. I think its a very important safeguard to have.

I did take a look at the A1000 flow chart and it only shows flow rate till 80psi so I figured anything above that would be unstable.

Nice! 750whp going 154mph is very impressive in a 2500lb car.

locash

You don't need the EMS to do this, get a damn pressure switch, tie it to the ignition relay.

Needless to say, Im running dual bosch 044's and so are a lot of people.

Oh, and for that matter, Neptune can do it, just be creative, use an adjustable pressure switch, tie it to an input to switch the maps to the secondary maps, with nothing on the tables, problem solved.. Think outside the box.

Tony the Tiger

Doesn't work that way...

If either pump was to fail, you lose the full capacity of both pumps. The Bosch needs the Walbro to supply its fuel inlet at a certain flow and PSI, and either pumps fail means you only end with one pump working. No one pump would do the job by itself, hence, that's why we need two pumps?

Tony the Tiger

That's a good idea... Set the secondary maps to come in under a certain condition + input switch and its all good.

0B R Fittings

iTrader: (3)

Oh I agree to a point. At WOT and full boost if one pump was to fail the engine would lean out big time. However, you will still be getting fuel to the engine. If you have one a1000 and it goes you have nothing. Thats the point I was trying to make.

boosted hybrid

I have found that when one pump fails with dual pumps, the a/f gets so lean that the engine lean misfires. Just breaks up like crazy, and the engine does not get hurt because there is barely any combustion. The only time it gets hairy is when the fuel pressure is still feeding the engine enough pressure to keep the a/f's in the 13-15:1 range under boost.

gogetta

Im gonna sell me a1000 and get 2 bosch's 044's. Where's the best place to buy them? Also whats the best way to wire these 2 pumps? A wiring diagram would be helpful. One more question, Where can i get a fitting for my fuel rail that goes from a -10an to a 5/8"npt thread. Ive tried all the big names jegs,summit, cant find it any where.

0B R Fittings

iTrader: (3)

What brand fuel rail do you have? I've never seen a 5/8npt threaded fuel rail.

turboteener

http://www.bosch-motorsport.com/pdf/...mps/FP-200.pdf

gogetta

Thanks!!