Top feed 24v injectors.

roachie

roachie

Taco Master
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Nov 2, 2007
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Ive been seeing these thing popping uplately and was wondering what the advantage is? Ceder City's truck, and the Yellow SD (sorry, I didnt catch you name) both have them with Sigma pumps.

Is this needed to handle the volume of a Sigma? Or do the injetors themselves preform better in a top feed design?

Or do I need to just shut up and admit I want them so I can look cool too:rockwoot:


:thankyou2:
 
They are john deer injectors and open up alot of possibilities for performance but i dont know any real specifics
 
We have a couple of them going and it solves issues with the std 24v injector set up. Its a lot to do just to look cool.
 
What is the draw back to the 24v style injector?

I'm guessing that it will still be way cheaper to have some custom 5 hole stix made.
 
roachie said:
What is the draw back to the 24v style injector?

I'm guessing that it will still be way cheaper to have some custom 5 hole stix made.
Click to expand...

Due to the side inlet of the 24v style injector it has several draw backs when it comes to big fuel. The crossover tube is one, also the fact that you cannot dual feed the injector bodies.
 
"Way Cheaper" and this type of conversion dont really go hand in hand. If your looking for the least expensive option then this shouldnt be your choice.
 
So, what gains could be expected. And how much does it cost? What exactly is done to the head?
 
GRotman said:
Due to the side inlet of the 24v style injector it has several draw backs when it comes to big fuel. The crossover tube is one, also the fact that you cannot dual feed the injector bodies.
Click to expand...


When your saying dual feed, are you meaning dual line to the injector, or dual passages in side it? I know of a guy that said he can machine the passages in the injectors. It was not cheap at all, said that is the primary reason that most don't do it with the 24V injectors. The HP gain per cost is very low.
 
He actually said 3 passages are possible, but your looking at about $450 per injector.
 
The gain, Increased fuel delivery with a wider range of nozzle variations and a more reliable platform. The amount of gain would depend on the individual set up. The cost would also depend on how detailed you wanted to be. Injectors fully done (dual or triple feed, new nozzles rough edm'd and extruded to the finish size), new lines, return system, machine work and installation bring it to a price point most wont venture into for the whole package.
 
Let's say working dual feed injectors, fuel lines, machine work, and anthing else required to make it run excluding installation. How much $$$$ are we talking?

Is there anthing done to the head itself?
 
Yes there is machine work required for the head. Quite a bit of it in fact. You would have a couple grand into doing it correctly. If we start with a fresh head, we have control over the relationships since we are machining every facet of it. Certain stack ups exist as far as injector position is concerned. The more square and true all of the machining is the better your end results will be.
 
Pic.

100_0173.jpg
 
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