Injector pop preasure? - Competition Diesel.Com

J-Pipes · 10-04-2016, 07:51 PM

Wondering what the symptoms would be if a set of 24V injectors set for p-pump pressure, were installed in a VP truck? I don't know the full history of my injectors, traded smaller ones for these with a guy I worked with, he wanted smaller, said they came from a pulling truck, supposed to be 150hp shied injectors. They are 6 hole, not sure the size though. Just seem kinda hot a "dirty", very hazy idle.

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jlbayes · 10-05-2016, 07:10 AM

6 hole tend to haze at idle and be dirtier vs. a 7 hole. Did you pin the nozzle orifice?

J-Pipes · 10-05-2016, 08:07 AM

By pin do you mean measure it? If so no, I don't have anything to do that with. My truck definitely seems to run ok, feels strong, picked up about 5psi boost with these, but it seems like the egt's just keep getting hotter for the average. I'm thinking it's mostly something with the turbo, but got to wondering about the injectors.

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J-Pipes · 10-05-2016, 08:11 AM

https://vimeo.com/185641887

Idle on a fully up to temp engine.

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jlbayes · 10-05-2016, 08:51 AM

Pin gauges are cheap and would give you an idea of potential. The other factor would be cone angle for smoke/haze.

mathews8pt · 10-05-2016, 08:15 PM

6 holes are dirty but tend to make a little more power. Checking pop pressure isn't a bad idea though. So glad I finally bought the stuff to do my own

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J-Pipes · 10-05-2016, 09:01 PM

Quote:

Originally Posted by mathews8pt

6 holes are dirty but tend to make a little more power. Checking pop pressure isn't a bad idea though. So glad I finally bought the stuff to do my own

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What would you charge to check mine if I pulled them? Would have to be a while yet, still need the truck regularly for at least a few more weeks.

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gman99 · 10-08-2016, 02:48 PM

You can use thin fishing line and an accurate caliper to measure injector hole size. See which piece of fishing line fits in the orifice snuggly and then measure the diameter of the fishing line with a caliper. Cheap and easy way to get a good idea of what you have.

10-04-2016, 07:51 PM	#1
J-Pipes Name: J-Pipes Title: Too Much Time Status: Not Here Join Date: Jan 2012 Location: Ohio Member`s Gallery Posts: 4,575	Injector pop preasure? Wondering what the symptoms would be if a set of 24V injectors set for p-pump pressure, were installed in a VP truck? I don't know the full history of my injectors, traded smaller ones for these with a guy I worked with, he wanted smaller, said they came from a pulling truck, supposed to be 150hp shied injectors. They are 6 hole, not sure the size though. Just seem kinda hot a "dirty", very hazy idle. Sent from my SAMSUNG-SM-G930A using Tapatalk __________________ 2000 Dodge ext cab short bed, 6spd.

10-05-2016, 07:10 AM	#2
jlbayes Name: jlbayes Title: Too Much Time Status: Not Here Join Date: Mar 2011 Location: michigan Member`s Gallery Posts: 2,399	6 hole tend to haze at idle and be dirtier vs. a 7 hole. Did you pin the nozzle orifice? __________________ Jacob, 97 rclb

10-05-2016, 08:07 AM	#3
J-Pipes Name: J-Pipes Title: Too Much Time Status: Not Here Join Date: Jan 2012 Location: Ohio Member`s Gallery Posts: 4,575	By pin do you mean measure it? If so no, I don't have anything to do that with. My truck definitely seems to run ok, feels strong, picked up about 5psi boost with these, but it seems like the egt's just keep getting hotter for the average. I'm thinking it's mostly something with the turbo, but got to wondering about the injectors. Sent from my SAMSUNG-SM-G930A using Tapatalk __________________ 2000 Dodge ext cab short bed, 6spd.

10-05-2016, 08:11 AM	#4
J-Pipes Name: J-Pipes Title: Too Much Time Status: Not Here Join Date: Jan 2012 Location: Ohio Member`s Gallery Posts: 4,575	https://vimeo.com/185641887 Idle on a fully up to temp engine. Sent from my SAMSUNG-SM-G930A using Tapatalk __________________ 2000 Dodge ext cab short bed, 6spd.

10-05-2016, 08:51 AM	#5
jlbayes Name: jlbayes Title: Too Much Time Status: Not Here Join Date: Mar 2011 Location: michigan Member`s Gallery Posts: 2,399	Pin gauges are cheap and would give you an idea of potential. The other factor would be cone angle for smoke/haze. __________________ Jacob, 97 rclb

10-05-2016, 08:15 PM	#6
mathews8pt Name: mathews8pt Title: Too Much Time Status: Not Here Join Date: May 2009 Location: central ohio Member`s Gallery Posts: 2,269	6 holes are dirty but tend to make a little more power. Checking pop pressure isn't a bad idea though. So glad I finally bought the stuff to do my own Sent from my iPhone using Tapatalk __________________ Hobie 2000 QCSB, 180 pump, 6x.013's, maxspool 2.5, trans built by me, AD150, 64/80 compounds 11.51@119mph w/s468 single

10-08-2016, 02:48 PM	#8
gman99 Name: gman99 Title: Diesel Enthusiast Status: Not Here Join Date: Sep 2012 Member`s Gallery Posts: 224	You can use thin fishing line and an accurate caliper to measure injector hole size. See which piece of fishing line fits in the orifice snuggly and then measure the diameter of the fishing line with a caliper. Cheap and easy way to get a good idea of what you have. __________________ 98 QCLB 4x4 12V, ARP625+ Studs, 14mm mains NonIC pistons, Ported head, Marine Cam, Hamilton Pushrods and Tappets, BeeHive springs HE351cw over Billet S475, 4KGSK, 5X.018's, 7mm DV's, 24 Degrees Timing, 5" Exhaust, TCS Input, DPC Converter, Firepunk Competition Rebuild Kit