155/30 DIY injectors and a PMAX - Ford Powerstroke Diesel Forum
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Old 09-05-2013, 04:11 PM
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155/30 DIY injectors and a PMAX

Is it worth it? Been thinking of my goals for this truck and originally settled on 175/stock nozzles. Well I would like to keep the option for heavy towing open and see that a lot of you guys that tow heavy are running 155/30 warrens and a Stage 1 or Pmax. After tinkering with a spare set of injectors for a while and reading the "project outcast" Diesel Power article about the 155/40 Elite Diesel kit and Two Iceberg's injector mod post I am fairly confident on doing this. All it takes is to plug the spill port on an injector to make it a 155 CC right? Is this how Warren does it? I think that in a weekend, some material to plug the ports and some reseal kits I may be able to accomplish this.... Or am I too far fetched and just send them out? For my current non-studded situation, this should be an easy mod that will help my Pmax spool better, am I right? When I stud it maybe I can drop some coin on the nozzles because they seem pricey. What do you guys think and for those who are running this combo, how do you like it?
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Old 09-05-2013, 05:55 PM
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155/30's and a Pmax with a MTW billet wheel would be a good safe tow setup. Of course the MTW stage 1 with those injectors has proven to be a really good tow setup as well and comes with the billet wheel for less $$$.

Maybe read Coalfired's post with his thoughts on both turbos.
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Old 09-05-2013, 06:36 PM
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Thanks PGreen. I already have a Pmax with a MTW billet wheel. I like it, but didn't at first though it was way too laggy. But after I added the wheel, a custom tune and FICM tuning I like it and feel that these little tweaks here and there are making it better. And if a weekend warrior like me can do such things then why not try new things? I don't see many people trying to mod there own injectors and don't understand why.
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Old 09-05-2013, 08:06 PM
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Quote:
Originally Posted by Merc82 View Post
I don't see many people trying to mod there own injectors and don't understand why.
Most don't have access to a lathe to cut the plunger and piston, or they feel intimidated with plugging the spill ports.

I'm gonna wait till I need to replace injectors, before I DIY my own. Even then, I'll buy all remans and start with fresh.




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Old 09-06-2013, 03:13 AM
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I have a terrible memory and for this I appologize but I'm pretty sure I asked Patrick at Warren your exact question about 155 DIY kits and he informed me they not true 155 and that warren drills the main chamber or whatever. You could call and ask for clarification, if so do post. I do recal being capable of the DIY mod but after talking to warren comparing their 155s to Elites DIY kit was not apples to apples - dang I wish I had a better memory though - sorry!
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Old 09-06-2013, 03:57 AM
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I will admit that it seems kinda sketchy that you can just plug spill ports and instantly the injector is a "155cc" injector. However, I have did my own research and bought two brand new Alliant Power injectors. I tore them down and measured the internal capacity of each injector. One was 154.6mm^3 and one was 153.2mm^3 AND if you multiply those numbers by 1000 pulses (the number used to determine an injector's CC rating), then you get ~155cc injector. SO then taking into account that about 20cc leak out the spill ports, you get the ever acclaimed "130-135cc" stock injector. So the Elite DIY kit is (IMO) indeed one way of getting a set of ~155cc injectors. Hope this helps.
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Old 09-06-2013, 04:18 AM
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Jet jock and Lilpooh thanks. And you are right Pooh, a lot of people don't have access to a machinist they could trust or afford the downtime. I guess that is why have companies we can trust to mod and fall back on if something goes wrong. I do think I will mod my existing injectors and when the time comes and they start to fail I will just by a whole batch like you mentioned. Jetjock that is a good enough answer for me. One of the reasons I brought this up is because of the ideas of plugging spill ports, it seems to accomplish adding more CC to an injector, bit from all the reading I have done on here is that it seems to affect idle characteristics. I want my truck to run as it would normally. I was unsure on the 155s and I really haven't read much of folks using Elite's kit. JetJock, if you don't mind me asking did Warren mod your existing injectors? And how much did I run? Thanks for answering my questions guys. I am on my way to work and I just get these stupid ideas in my head and I think, "hell, that guy can do it, I sure as hell can too!!". To much coffee and Red bull..... simmer down now....
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Old 09-06-2013, 04:21 AM
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1 mm ^3 = 0.001 cc. Not to be a prick but "154.6mm^3 and one was 153.2mm^3" should be .1546 mm^3 and .1532 mm^3. It was just confusing me is why I am pointing it out.
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Old 09-06-2013, 04:29 AM
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Wait a minute I think I'm wrong, sorry guys. disregard what I said.
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Old 09-06-2013, 04:43 AM
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I,m not beyond asking a really stupid question - what is ^3 stand for ?
MERC 82 I,m considering the same set up and I hope you keep this alive .
I personally don't care for plugged spill ports as I believe it could bring on grief later.
Twoiceberg's write up on 175's is excellent and I would imagine you could accomplish
155's without plugs .
If you were to do this what nozzle size would be best 30% or 50% ???
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