Getting around the 2 injector motor issue

[Kestrel2126]

So now that we know next years motor is going to be a 2 injector setup instead of 4, do we think that the stock fuel pump/rail/injectors will deliver enough to run a turbo (at higher boost #'s). I hear the Cats are running auxiliary pumps and injectors on some of the setups, but it sure would be nice to not have to do that. Thoughts?

 

[snow4shover]

I see no one has answered you question. The Pro RMK is going to be a 2 injector sled and they are small. The stock injectors should be able to fuel enough light modifications but if you are going to be doing a turbo you will probably have to add additional injectors. You can add just larger injectors in your stock locations but then you will have to compensate with fuel pressure. This might hurt your performance. The larger injector size the larger amount of dead time (injector turning off and on). Mostly everyone will be doing additional injectors. Hope this helps you out.

 

[SNOW JW]

The stock setup will give you good power more HP will be available than the cats before running out of fuel will be an issue.

With the BD box you will be able to watch at what % your injectors are running at thus letting you know how much more fuel you have left for more boost.

The pump will not be an issue.

As far as more fuel this has already been worked out but more details will be released on this later on.

 

[mountainhorse]

The pump is the same in-tank pump from the current CFi 800 motors.... slightly different pump mount in the tank with the regulator(s) mounted to the rail.

Fuel delivery will not be a problem as this same pump fed full race gas 16+ lbs of boost in the past without issues.

 

[Kestrel2126]

I guess I wasn't so much worried about the pump keeping up, as the injectors. Jared at BD is saying that they are sufficient, but not much more than that as far as details. Hopefully the 2 injectors can handle matching fuel with 12-14 psi of boost @ around 10-13500'. If it can I will be completely satisfied! Since I know he is going cruising around the forum, I wonder if SILBER, has any input???!!!

 

[Silber]

Here is what I know as of now.

The sleds have the same fuel pump and regulator intank as far as I know.

Them things on the rail are FUEL RAIL DAMPERS. Not regulators. They might be though MH says they are.

A fuel rail damper stablizes vibrations in the fuel cause from the injectors opening and closing so fast. The dampers will allow the fuel pressure to be more consisent and smoothing flowing.

The injectors Iam unware of. If they are the same as the 900's will be be able to get around 10-12psi out of. If not either secondaries or larger injectors will need to be installed for high boost levels.

Personally I am going to run larger cc injectors and control the pulse width to take away fuel on the bottom end.

If the injectors are the size I think they are 6 psi is going to be the max you can get out of them.

I am keeping the rest of the information I have to myself as of now.

If you have any further questions please call or email me, I will gladly help you out.

And yes we will have a turbo kit for this chassis.

Justin Silbernagel