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Gearheads
An interesting upgrade for some older vehicles.
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<blockquote data-quote="NightShade" data-source="post: 3081290" data-attributes="member: 29706"><p>Agree but probably more of a problem for direct injected diesel's than gas when dealing with piston shape and such.</p><p></p><p>Dodge does run higher, I believe my year is 42psi and the newer ones are 49psi. However the manufacturer's tend to rate them all based off the standard so an injector rated at 24pounds will still be ideal if the oem injector was the same or close. The HO motors use a 24pound injector on the 4.7l and the standard is 19 pounds, the older 19 pound ones were under rated though. The injectors can also be adjusted by the computer up to about 20 percent based on the burn being reported by the O2 sensors.</p><p></p><p>The OEM injectors for the 4.7 are a siemens brand 2 hole with a red band near the tip but even rock auto is selling ones that are a 4 hole injector from SMP and are rating them for years from 2001 to 2007 in the Dakota even though the 2004 year to 2007 year went to a 4 hole standard that from what I read flowed more than the 2001 to 2003 injectors.</p><p></p><p>I did a lot of research before I pulled the trigger. I think that the O2 and Fuel trim tell the story best though since the trim is low and the O2 sensors are reading right where they should be.</p></blockquote><p></p>
[QUOTE="NightShade, post: 3081290, member: 29706"] Agree but probably more of a problem for direct injected diesel's than gas when dealing with piston shape and such. Dodge does run higher, I believe my year is 42psi and the newer ones are 49psi. However the manufacturer's tend to rate them all based off the standard so an injector rated at 24pounds will still be ideal if the oem injector was the same or close. The HO motors use a 24pound injector on the 4.7l and the standard is 19 pounds, the older 19 pound ones were under rated though. The injectors can also be adjusted by the computer up to about 20 percent based on the burn being reported by the O2 sensors. The OEM injectors for the 4.7 are a siemens brand 2 hole with a red band near the tip but even rock auto is selling ones that are a 4 hole injector from SMP and are rating them for years from 2001 to 2007 in the Dakota even though the 2004 year to 2007 year went to a 4 hole standard that from what I read flowed more than the 2001 to 2003 injectors. I did a lot of research before I pulled the trigger. I think that the O2 and Fuel trim tell the story best though since the trim is low and the O2 sensors are reading right where they should be. [/QUOTE]
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An interesting upgrade for some older vehicles.
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