told I couldn't run 6x16 injectors?

[redneckroot]

I was talking to my local high performance diesel guy (he owns the old Big Bad Dodge) about getting some injectors. He called me back and said that I couldn't run 6x16 injectors because it would run my pump out of fuel, and the only way I could run them would be to have a bunch of mods done to my pump? That was even with the electric lift/fuel pump and 1/2 lines. Something isn't adding up what do I have to do to run them? Looking for 400+ hp and don't feel like getting screwed and having to buy injectors twice. Thanks guys.

[KTA]

To run 6x.016" injectors you will need 6 thin copper sealing washers a 15/16" deep well socket and torque wrench. A 10mm and a 11/16" open end wrench. That should be about all the tools you will need to stick them in your motor in place of the ones in it. There is no special requirment to run any size injector, now as to if it runs well or not that is a whole nother story that will be based on your other mods and tuning.

[dpuckett]

I agree with KTA. Provided you have at least a piston lift pump (even better if you have a high volume, boost referenced electric pump), you should have a streetable pickup. I think Bill ran 6x18s with a piston lift pump. I KNOW he ran them with his Aeromotive whateveritwas.

There are people who think 300hp from a VE pump is a miracle. 10 years ago, it was. Get your sticks from someone else.

Daniel

[Richie O]

Philip runs 6x18's with stock fuel settings. He does not have 400 hp but it proves you can run a big set of sticks as long as you know a stock lift pump and a stock size turbo is not going to be happy with the fuel screw turned in. I run 297 hp on my non i/c injectors ( 4x12 ). There is no reason why I could not run the same hp on 6x16's and have the current fuel lift pump and turbo. I suspect I would have to actually turn fuel screw out some to keep the same hp If I did change to a bigger holed injector. If I am wrong ,,,, SORRY.

[redneckroot]

I didn't think it would be an issue. Let me know if you think this will work.
Electric pump that I have new in the box http://store.summitracing.com/partdetai ... toview=sku

Along with 1/2 lines and a fuel pressure gauge after the filter.

Thanks guys,
-Tom

[Richie O]

Someone else will have to comment on fuel pumps. I KNOW NOTHING. I still run all stock stuff.

[burnt_servo]

I didn't think it would be an issue. Let me know if you think this will work.
Electric pump that I have new in the box http://store.summitracing.com/partdetai ... toview=sku

Along with 1/2 lines and a fuel pressure gauge after the filter.

Thanks guys,
-Tom

i've run the next size smaller carter pump in my vw for that last 3 years with no problems at all .
i wired a relay into the solinoid that power the injection pump so the 2 are turned on and off at the same time .


the question is , is 100 gph enough volume to keep the fuel presure from dropping to zero under full boost / max fuel ?

[Ace]

You'd be hard pressed to burn 50gph with huge sticks.

[dpuckett]

Philip runs 6x18's with stock fuel settings......

And he still manages to keep the fuel pressure at a steady 5-6psi, whether he's idling, or has it floored. I was amazed. I forget what kind of boost he runs- mid 30s rings a bell. Same boost in my D350 had the fuel pressure down around 2-3psi.


It takes 3500psi to pop the injectors. The pump operates at 5-9000psi, with a peak of 10K psi if it is maxed out. Running 150mm of fuel through the tiny holes of a set of 6x18s wouldnt hurt the atomization that much, IMO. KTA- what say you? Am I on the right track, or have I been inhaling too many second hand fumes from the bar next door?

DP

[Philip]

I am pushing 24 PSI on that HX40. If I was using a H1C it would be right at 30 PSI most likely.

My lift pump is about 2 years old. With a new filter I am seeing 7PSI at idle with 5 PSI at WOT.

[PToombs]

Tom, I told you these guys would know.
If you would like to up grade to a piston pump, let me know.

[Richie O]

Philip, I was hoping you would stop by. I hate answering a question by talking about someone elses truck. Im always afraid I will get it wrong.

[Philip]

I'll try to explan the step to the bigger injectors a little better.

On my stock injectors when I mashed the motor. The boost would slowly build to 20 or so PSI with the stock H1C. It would also do the same way with the HX35. That was with a 16cm housing on both turbo's.

After the injector swap. The boost comes on now. There is no slow build up like before. I also can blow threw the converter stall real easy. Red your showing a better converter in your truck. So boost reponces will be better with your truck.

The 6X.016's are a big injector. Remember your pump settings determines how much fuel you throw at the engine. You can tune the pump for what ever performance level you need or want. You just need other up grades if you want to use all those injectors can give.

The one area I would be concerned with is air flow. Your not showing a IC swap or turbo upgrade. These injectors raised my max EGT's around 200 degrees at WOT. That is on an IC engine. On a nonIC I bet it would be more.

[redneckroot]

After thinking about it and talking it out I think I'm going to go with 5x014's I can get them for around 400 bucks with no core charge Which is half the price of the others. The turbo I've been looking at is the PhatShaft 62 from industrial injection https://stores.myregisteredsite.com/use ... haft+Dodge .

Before I spend my money will I be able to get my 400+ hp goal and have manageable egts? I am putting a 1st gen intercooler in it with the cooler tubz.

Do I need to upgrade to a piston lift pump too? Or will the electric one cut it? If I don't need to should I still plumb it into the stock pump? I just got my 1/2 feel line plumbed into the tank I'd post pictures if I knew how to.

Thanks,
-Tom

[dpuckett]

Piston lift pump is almost a have-to, stock or otherwise. The pitiful diaphragm lift pump is just too little for these engines in the long term, esp with a goal of 400hp+.

DP