There's a dime a dozen as far as places that sell reman Bosche injectors. Note how all list them as new.

http://fuelinjectorconnection.com/sh...od&productId=4 Set of 8 for 275.00.

 

Alright I finally got a response from Bruce at Five-o motor sport and this is a set of 4 hole 23.5lbs injectors that's made for our trucks. The page says they're for 96, 97, and 98's so I'm going to ask him if these are compatible with any other years since I told him I have a 99 and that's what he linked me to.

http://www.fiveomotorsport.com/domes...s/?itemid=1268

 

Those are only for 5.7, 5.9 engine sizes and, they are rated @ 43 psi at the input so, if you put those into a Dodge Ram that's running 49± 5 psi, that's going to run a range of 24 lb / hr - 26 lbs / hr which is fine for a 5.9 engine but, not so much for a 5.2 which requires 22/lb injectors due to the lower HP rating.

So, when saying something as general as made for our trucks, the fact is it will work for one engine size and one type of PCM. Not all PCMs can control those Stage 1 injectors that he sells.

Regardless of what the page says, there's been known issues with his site where, the information per injector to vehicle compatibility was wrong and, I had to call him and point that out to which, he later revised the information to reflect this new information.

So, always do your homework and always remember that, a human put the information on the site and, there may be error there as well. The OHM spec was off as was the flow rate so, just be aware that's all.

When it comes to injectors, it's not a one-size fits all type of deal. These people that sell them don't even rebuild them sometimes. All they do is BUY and SELL them which, is what I believe he does. I have a friend who actually does the work, does the testing and mods etc and, he knows where he is getting his injectors from. It's probrably the same supplier that is also supplying this company as well http://fuelinjectorconnection.com/sh...od&productId=4.


CM

 

94-95 siemans ev1 design2 black tops 53030262 24.6@39psi
96-99 siemans ev1 d2 53030778 grey tops 23.2@49psi
00-01 5.2 siemans ev6 04854181 blk/blue 22.5@49psi
00-02 5.9 bosch3 ev6 53031740 or 280155934 23.6@49psi

those are the most common dodge v8 oem injectors.bosch design 2 and 3's both fit the rail's and mani.there all high impedance so no issue with pcm.mother mopar used both types in the rams.note the psi change in 96 and in 00 dodge put diff injectors in the 5.2 then the 5.9. on a bolt-on motor keep flow rates very close to oem rates.

 

Now that I have an AFR gauge... the 24#s I have are overkill. They will require custom tuning to bring the AFR up at WOT (reads 10.0 and is pegged at the rich side. God only knows just how rich it is running).

SO, if you go larger, you will need custom tuning. But if you get a 4 hole upgrade (same flow rate), you won't need to worry about running too rich at WOT.

My 24# injectors are 24# at 43.5 PSI. THey are more like 25.5 at 49 PSI with the pressure at our fuel rails.

My old 1996 5.2 and 2001 5.9 had the same pressures at the rail.

 

What is happening here is, the OEM tune doesn't have the capability to adjust the fuel trims enough to bring that down to withing normal operating range. In order to trim that back, the fuel trims at the PCM program level must be adjusted accordingly to achieve proper A/F ratio. This requires a programmer to write new values into the fuel trim field, save the file and upload it into the tuner and finally FLASH the PCM with the new tune.

However, with modded tunes, they run rich in attempt to gain more power. This is based on OEM parts. So, in order to program a new tune for those larger injectors, the current A/F ratio at idle, 65, and WOT must be provided to the programmer to which, he / she can interpolate the amount of % that the fuel trims must be reduced. This may be a global reduction so that ALL tunes share the same amount of reduction or, it may be decided to adjust it differently per tune.

CM

 

Do you know which four hole injectors maintain the same flow rate at our fuel rail pressures? You probably said it already but sometimes I need things spelled out for me or I miss it...sorry about that. I recently started a new job and my mind has been at capacity lately trying to adapt. Not to mention it is keeping me busy enough that my Dodge forum lurking duties have fallen on the wayside.

 

I have yet to find 4-hole injectors that are 19-22 lb for 5.2 liter engines. I had to run larger injectors myself just to be able to use newer injectors. There are three hole injectors made by Lucas that are 22lbs @ 49 psi but, I tested those and, sad to say, they were complete garbage. The spray patterns were all over the place right out of the box and, the flow rates were all over the place as well.

The problem with most after market injectors is the innards. The OEM injectors have special coatings used on the windings to prevent shorting internally or, to case, the metal parts inside are also highly finished as well as being polished to prevent sticking and / or binding. The material used for seals inside is also of top quality so that they last a very long time. One needs to choose after-market injectors wisely for, if you go with a reman set, they may not last half the life of OEM coupled with a loss of performance due to poor atomization and unmatched flow rates across all cylinders.

 

Is the stock injectors in a 5.2 19LB

 

The answer to that question is yes in a way. Let me explain. The value I use is 22lbs @ 49 psi as that is what the psi rating is at the fuel rails. It wasn't until after someone pointed out to me that the dealer reference is 19 lbs @ 43 lbs, it can be said, that yes, they are 19 lbs for 5.2 / 22 lbs for 5.2. So, I do believe this is where that was derived. However, there was another thing that was mentioned.

In addition to that information, it was also presented to me, that, the actual flow rate was closer to 19 lbs in a STOCK 5.2 liter engine. Now, I've personally not verified this.

I do believe that it was Sean Powell who relayed that to me via email not too long ago. So, whether he meant (or not) that the PCM fuel trims are dialed way down on the OEM tune so that the amount of fuel that flows through over a static period of time amounts to 19 lbs / hr, I am not certain but, I ASSUME that's what he meant because, I know, that a injector rating of 22 lbs / hr @ 49 psi means, just that, it does not mean the injector flows closer to 19 lbs / hr at 49 psi. I had mentioned this to him via email but, never got a reply back in regards to exactly what he meant.

So, what I am going to do, (to satisfy my own needs) is to install flow metering and start collecting data under real world use.

CM