Injectors EDM VS Extrude Honed? - Dodge Cummins Diesel Forum

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post #1 of 18 (permalink) Old 04-01-2006, 06:40 AM Thread Starter
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Injectors EDM VS Extrude Honed?

I was wondering what the difference between the two are? I have supposedly 125hp nozzles and was looking to go with maybe 150's now I have the comp box and Fass II installed. Any suggestions?



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post #2 of 18 (permalink) Old 04-01-2006, 09:00 AM
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EDM = lasered
Extrude Honded = drilled

Edm process provides a smoother more accurate tip than the extruded honed.
You will see less smoke in normal driving, but there if you want it, More usuable power, and with the 150's in my truck im showing a mpg increase.

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post #3 of 18 (permalink) Old 04-01-2006, 11:48 AM
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There ya go Chuck!!!
School him in on your injector philosophy!! lol!
Still waiting on my buddy so i can get the d*** 435's!!

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post #4 of 18 (permalink) Old 04-01-2006, 07:05 PM
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On the extrude honed i was under the impression they run a aggregate fluid through them and it hones them out.


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post #5 of 18 (permalink) Old 04-01-2006, 07:25 PM
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Quote:
Originally Posted by Sea01Cummer
On the extrude honed i was under the impression they run a aggregate fluid through them and it hones them out.


Steve
My understanding also.
Liquid with microscopic abrasive is pumped though at high pressure that will enlarge the nozzle with precision control while also buffing them very smooth. More fuel can flow with less turbulence creating better fuel atomization

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post #6 of 18 (permalink) Old 04-02-2006, 04:06 PM
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Skitzo, It looks like we have the same setup and I went with 150hp EDM injectors and I Love Them. The power is awesome and fuel mileage is even better. I got mine through Woodsrat.

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post #7 of 18 (permalink) Old 04-05-2006, 11:41 AM
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EDM means Electrical Discharge Machining. An eletrical arc is used to remove microns of material at a time. This produces a perfectly smooth surface. I don't see why anyone would follow EDM with abrasive fluid because nothing provides a smoother finish than EDM.

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post #8 of 18 (permalink) Old 04-05-2006, 06:40 PM Thread Starter
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10-4/ I'm not a mechanic especially when it comes to Diesel so I appreciate your help(schooling as mentioned above). I like to be able to know in advance when making purchases especially when it comes to my truck that could leave me stranded in the middle of no where.


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post #9 of 18 (permalink) Old 04-05-2006, 07:15 PM
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Quote:
Originally Posted by yarddog
EDM means Electrical Discharge Machining. An eletrical arc is used to remove microns of material at a time. This produces a perfectly smooth surface. I don't see why anyone would follow EDM with abrasive fluid because nothing provides a smoother finish than EDM.
I'll disagree with you somewhat, the EDM process can create "rough" features....It all depends on how good a hole the operator wishes to make.
All EDM'd injectors are not created equal because of variances in speed of which the machine is ran and then there is also the consideration of the EDM machine tolerance ability as well.

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post #10 of 18 (permalink) Old 04-05-2006, 09:30 PM
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I have never heard of anyone doing both. It's either extrude honed or EDM, but as far as which is better I've been told both ways. I have extrude honed and I like em fine.

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post #11 of 18 (permalink) Old 04-05-2006, 10:39 PM
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extruded honed have a lot of smoke. I want the EDM'd 435 for better milage along with more power

twins, rpm, fuel and some small extras.
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post #12 of 18 (permalink) Old 04-06-2006, 08:02 AM
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Quote:
Originally Posted by yarddog
EDM means Electrical Discharge Machining. An eletrical arc is used to remove microns of material at a time. This produces a perfectly smooth surface. I don't see why anyone would follow EDM with abrasive fluid because nothing provides a smoother finish than EDM.
The EDM process does leave an edge, I have used the machine before, so I know..........the abrasive fluid used to hone out an injector has been applied to some injectors after the EDM process offering a very smooth finished product.

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