Does anyone know of a reputable company modifiying new Alliant injectors to be 160CC SPLIT SHOT's? Living in California, I worry about having to run modified calibrations to utlize 160CC single's in my 2000 Super Duty due to having to smog it every two years. The smog testing shop I've taken it to for the last 6 years is great, but they do go by the book and do plug their testing equipment into the OBDII port during the inspections. I'm not sure what they look at while doing this, (My truck is a non-catalyst) but it worries me that they might be able to detect the modified PCM tuning if I was running singles. The last thing I want to do is buy new Single's and tuning, only to be stung during my inspection and have to undo it all.

My theory with keeping the splits is that I could just return it to stock calibration for smog testing and the injectors would perform the same as the stock 140CC injectors with the stock calibration only delivering the fuel demanded. Then when done, I can utilize the modified calibrations to take advantage of the larger 160CC flow rate.

Thoughts?

 

Unless there is a separate chip or programmer attached to you PCM how would they determine the code has been altered? Unless someone has written some software that knows every line of code of every vehicle manufactured on the planet within the scope of whatever law that you're dealing w/, how do the tech's know what is or isn't factory programing?

To answer your question, try contacting @Bitterroot Diesel . They may be able to help, at a minimum, I'm sure they can lay out what options are available to you.

 

There is also option ADs with 30% nozzles.
Them should run fine with stock SD calibration.
@cleatus12r will tell more about that.

I've had zero problems to pass the actual smog test, here in Finland.I have DIY 205/80 injectors.

 

It seems you would be better suited to keep the AD split shot injectors. Why the drive (pun intended) to go with a single shot or modified injector?

Are you simply looking for more power?

A well running split shot is a lot better for someone in CA that is nervous, stressed or afraid of getting caught running anything other than stock.

 

I too would just go with a fresh set of 7ad and 1ae if injectors are needed

 

i asked bitteroot if anyone made larger split shots and he said no. said he was working on a set of hybrid split shots but they were considerably larger then stock. doubt they would work for you application in cali.

i did read what i could on larger nozzles on stock splits but i could never understand what good 30% larger would really do. some statements said 50 hp gain in stock config and others said 50 hp with proper tuning. never read any info on if they smoked more w/o tunes or not. that was some time ago and i gave up on it and bought remanned from FFD......that was a mistake! the brand new inj's from bitteroot made such a huge diff and very happy with them still.

 

Factory split shot with 30% nozzle would be the economical choice if you are looking to make your factory set up more powerful. We say 25HP increase with a 30% nozzle. Custom tuning recommend, but plenty of customers run without custom tuning.

The exotic option would be the BASS injector with a stock nozzle (very expensive). The stock nozzle will make the BASS a 160cc+ injector on steroids. It'll run on factory tuning, but ideally you'd have custom tuning to make the hybrid injector drive like a factory injector.

 

Thanks everyone for joining in the thread.

My goal is a little bit more power than stock, 25-50 ish HP range would be great. Stock turbo, probably will install KC Turbo’s stock plus turbo when the time comes. I hate turbo lag and with the small fuel increase I don’t anticipate needing more air to control temps.

The BASS injectors are intriguing, but not sure they’re necessary in my case or what I need. My truck runs good, and I don’t want to start the upgrade battle between performance and temp control. I spend a good amount of time driving at elevation in the Sierra’s too so that’s a consideration. New Stock AD’s may be the best fit for me but like I said a small bump in power would be great. The only reason I’m even interested in single shots would be for the supposed increase in efficiency but lagain I have concerns that I’d get stung at inspection time due to the tuning required to run them correctly at idle, so the 160CC split shots come to mind as a good option because I could just go back to stock calibration for testing purposes.

Read all of the HEUI injector thread, that was filled with good info, but doesn’t address my inspection concerns so that’s why I started this inquiry.

Thanks again for all your input.

 

Driving habits are the only thing that will have a significant impact on MPG. Stock injectors with a 30% nozzle seem to be trending with the shift in emissions climate.

 

I should have done a better job trying to state what I mean when I say efficiency. I'm more interested in overall system efficiency & power output vs fuel input. I suppose this same efficiency would result in MPG improvements too, but that's not my priority in injector selection. I drive like a grandpa though anyhow, and my truck regualary gets good fuel mileage considering its a 1 ton crew cab 4x4 on 35's. I get similar street MPG in my little bitty Tacoma

So 160CC AD's with a 30% nozzle vs 160CC AD's with stock nozzles seem to be the decision. Besides power output, any advantage of one over the other with the key considerations being (temp control and system efficiency for power output). Truck already runs very cool EGT's as it is set up, and I will likely upgrade my intercooler next before injectors as it's hard to beat cool dense air for free power.

I know this is a loaded question too, but considering the guys following this thread right now I'm going for it..... any tuning/tuner you can recommend for best utilization of either of these setups?

Thanks again guys, I appreciate your input. Most of the forums out there have gone crazy and are just filled with people yelling at each other. With this group it seems to be mostly about sharing information about our trucks, which is refreshing and super helpful.

 

When I bought my truck nearly a decade ago to be a hard working tow pig, I had efficiency, longevity and reliability in mind. Last summer we towed our 5th wheel from GA to ID and back reaching a peak altitude of 8,900'. At 18,000 - 18,500 lbs GCVW I achieved 12.3 MPG's average over the 5,500 mile trip.

I have 3.73 gears on a 4x4 platform, 265/75R16 tires and run a PHP 65 HP tune on 265,000 mile stock AD injectors and HPOP. I have a T4 kit with a Borg Warner SX-E 363/68/.91 turbo, but similar results are attainable through the inventory of parts KC offers.

If that isn't reliability, longevity and efficiency, then I don't know what is. I am NOT interested in 25 - 50 HP more and I live in GA where I can do whatever I like to my truck.

Don't fix it until it is broke...
Decide when enough is enough with your CA requirements in mind...

When it comes time for new injectors, I will go with stock AD's as I don't see the need to add 25 - 50 HP. Why throw a variable in a well functioning system... Especially since I drive/tow 65 MPH and like I have nowhere to be.

What works well for my situation and use is not suited for everyone, and that is OK. Your choice, choose wisely!

 

The are no 160cc ad. ad splitshots are 140.
The way you explain your efficiency desires, it makes zero sense for you to get a %30 nozzle. You will see zero gain, unless you go for full empty, which does the opposite of what you are saying you want.
If you need injectors you should really just do a fresh set of stock ad’s and toss a kc balanced assembly in your turbo. That will keep the epa ***** happy as well.

 

Unfortunately the KC stock plus turbo is not smog legal. The turbo must be (or appear to be!) stock so the tech will look for Garrett on the side. You can put modern turbine and compressor wheels in the stock turbo and get more performance while retaining OEM appearance. BD makes a CARB compliant turbo but no idea how good it is. Spendy.

Same story with injectors. They 'must be stock' but the smog tech cannot see them. You can put anything in there and as long as the truck does not blow black smoke to fail the opacity test it's fine. I plan to get 160/30's singles when the time comes. BASS injectors if my string of bank robberies continues to be successful. I'm in CA and must pass smog every 2 years.

The smog tech hooks up the computer so they can get the VIN and send results to the DMV. They can't read anything regarding the tunes on the truck. The switch for my DP chip is mounted on my A pillar gauge, and it's easy to hide it behind the grill in the vent on the side of the dash. Set it to stock tune and be careful to not to hit a button while hiding it.

I lucked into a NIB Mishimoto IC at a great price and it does help EGTs, but the biggest factor is the tunes. The IC is also not smog legal but again, the tech can't see it.

 

A larger nozzle will change the output of the injector unless the capacity of the plunger/barrel assembly is emptied. Fuel pressure and oil pressure will also change the output.

 

can you expand on this?

i can see a higher fuel pressure providing a more full refill of the injector or is it possible the higher fuel psi could pass more fuel per cycle? i only ask as i know that is the case in a gas engines.

on the oil side (in my case an adrenaline hpop) what change would that make at idle?

in your opinion what would be the possible effect of a fuel pressure of 65 psi with 30% tips? in regards to smokey haze at idle and mpg's? i know there's a lot of factors but ball park.

mine is set at 65 psi but i have never saw any mpg increase. now having said that, i have not had an opportunity to check since installing your brand new set of 205/30 inj's with the new AA tunes. our mt rushmore trip back in may was with php tunes that had been revised ( a few times) for what i now know to be 4 out of 8 bad inj's...... compliments of FFD ! i was able to tow there (9hrs) on his stockish tune but it was a bit smoky at idle where it wasn't previously for the obvious reasons. AA tunes corrected that and i understand why, the new inj's, new tunes with the new SB clutch have made a world of difference in my truck empty to a 3k lb load! i have not towed the toyhauler with this combo.... yet.