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If there is ever any questions don't forget you can give us a call. We try and always provide the lowest pricing we can but brands are developing stronger pricing schedules that we have to go by. We do currently have these discounted at checkout though or if you need just give us a call and we can help you as well.
This right here is why I stated earlier about always giving Clay (RiffRaff Diesel) a shot at my business first. Honest, no BS business that gets it done right.
They are brand new stage 1's practically, they were a performance option in the t444e engines but never in our's.
Originally Posted by BBslider001
Nice....guess they need tuning too? I'll keep these in mind for years down the road.
that is only part of the story, The AC 160CC single shot injector that was used in the high torque version of the T444E made 210 HP @2300 RPM at a time when other T444E used a 90cc since shot AA injector and only made 175 HP @2300 rpm Then in 1997 all T444E and the 7.3 power stroke had switched to the 130CC split shot AD and AE injector and made 250 hp at 2600 rpm.
the AD and AE 130cc single shot injector is exact the same internally as a AC 160cc injector other then the groove in the piston to allow for the split shot, the reason the split shot can make more power then the single shot is in how the fuel is utilized and why AC injectors tend to smoke and why they were done away with.... Tuners adopted them because they are easier to understand and write programs for not to mention the availability of 30 more cc of fuel that comes at WOT and higher RPMs.
Yes you need a custom tune with single shots because the fuel has to be injected earlier in the sequence.
that is only part of the story, The AC 160CC single shot injector that was used in the high torque version of the T444E made 210 HP @2300 RPM at a time when other T444E used a 90cc since shot AA injector and only made 175 HP @2300 rpm Then in 1997 all T444E and the 7.3 power stroke had switched to the 130CC split shot AD and AE injector and made 250 hp at 2600 rpm.
the AD and AE 130cc single shot injector is exact same internally as a AC 160cc injector other then the groove in the piston to allow for the split shot, the reason the split shot can more power then the single shot is in how the fuel is utilized and why AC injectors tend to smoke and why they were done away with.... Tuners adopted them because they are easier to understand and write programs for.
Yes you need a custom tune with single shots because the fuel has to be injected earlier in the sequence.
that is only part of the story, The AC 160CC single shot injector that was used in the high torque version of the T444E made 210 HP @2300 RPM at a time when other T444E used a 90cc since shot AA injector and only made 175 HP @2300 rpm Then in 1997 all T444E and the 7.3 power stroke had switched to the 130CC split shot AD and AE injector and made 250 hp at 2600 rpm.
the AD and AE 130cc single shot injector is exact same internally as a AC 160cc injector other then the groove in the piston to allow for the split shot, the reason the split shot can more power then the single shot is in how the fuel is utilized and why AC injectors tend to smoke and why they were done away with.... Tuners adopted them because they are easier to understand and write programs for.
Yes you need a custom tune with single shots because the fuel has to be injected earlier in the sequence.
Thanks bud. I didn't realize the AC was a single shot. I'll stay with my ADs. I love the way it runs now. I am guessing it would be even sweeter with brand new.
thanks, I edited it a tad to try and be more specific.
this pic ( borrowed off the P.S.army from superssp ) is the exact difference between a AD-AE140cc split shot and a AC 160cc single shot, t the fuel piston has a groove and the tip of that piston has a 5 tiny holes, when the groove passes the relief port in the barrel it returns fuel to the fuel rail.
the principal behind the "Split Shot" or pilot injection is simple.
try and light a spoon full of Diesel fuel on fire with a Bic lighter....hard to do and takes a long time, throw the cap full on a bon fire and it pretty much instantly ignites, the tiny initial shot of fuel is easy for the Bic lighter to ignite, that creates a larger fire which the remainder of the fuel in injected into. viola Split Shot, more efficient burn of of each injection of fuel and less black soot which is unburnt fuel wasted out the tail pipe.
So, when one steps up to bigger injectors(new for sake of conversation), are they also split shot or single shot? If single, whys that if splits are a better burn..
So, when one steps up to bigger injectors(new for sake of conversation), are they also split shot or single shot? If single, whys that if splits are a better burn..
as far as I know nobody makes a larger split shot for the 7.3 or t444e and the reason is there are no OEM parts available to do so. Bigger injectors are one of two types, You have your stock alliant AC 160cc injector and then “Hybrids” made up from various parts of other alliant injectors.
Just like a engine a injectors displacement is derived from Bore x Stroke of the fuel piston and barrel ( shown above )
well it turns out that the injectors on a DT466 which use “B” code injectors have a larger bore piston and cylinder that will fit inside of your AD-AE split shot injector, now you have a single shot because they use the solid pistons with no groove.
The downside is the larger piston which is activated by intensifier piston reduces the ratio from 7 to1 down to 5 to 1
which means instead of the fuel being under 21,000 psi it only get 15,000 psi, which means they need a larger nozzle tip in order to empty the fuel quantity in the allotted milliseconds of time, the larger nozzle makes bigger fuel droplets which are even harder to burn and less efficient.
Short answer.....because Alliant doesn’t make one and all these injector guys are using various bits of alliant injectors to assemble there offerings.
Thanks bud. I didn't realize the AC was a single shot. I'll stay with my ADs. I love the way it runs now. I am guessing it would be even sweeter with brand new.
Outside of the noise you wouldn't be able to tell the difference if you didn't know. Running down the road they aren't that much louder but anyone with a trained 7.3L ear can tell that the idle is louder. About 1/2 way between a normal 7.3L idle and an old 12V Cummins (but with a couple of extra injections per revolution ).
12-18-2018, 11:26 AM
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