LB7 injector life

[Big Block 88]

SO with the 5th set of injectors now out on my old 03, my question is for the LB7 guys running oversized/honed injectors are you seeing more life out of them??

5 sets in 370k miles is just tuff to swallow, 2 sets were toasted due to the dealer and there shotty install. But even then the filter is kept decent, maybe an aux filter would help me.

I am putting some money in this old pig so I can haul the welders around but I don't feel like foggin for mosquitos while cruising around. I have a guy lined up to do the injectors and I am willing to spend a little extra $$$ on injectors if I can have them last longer.

 

[blk smoke lb7]

Stock sucks not sure what your running but a better filter is needed pretty bad,i make my own lift pump filter combos.A 3 micron water sep pump and then a 2 micron absolute after and i tossed the stocker away.

 

[Big Block 88]

So did you do a delete on the factory filter location and remote mount one?? If so do you have pics?

 

[Big Block 88]

I understand the stockers are crap but, I was hoping to hear the honed or oversized injectors may be holding up better?? Maybe a large remote filter??

 

[Ne-max]

So did you do a delete on the factory filter location and remote mount one?? If so do you have pics?

Do both. Use your factory as a back up filter. You can delete it but its not going to help with anything. The remote one mounts to the frame. Its nice cause filters are 15 bucks for a better filter.

 

[Ne-max]

The is the first one I built. Could have done a cleaner set up but it worked great. Use your factory filter for the water separator.

 

[Big Block 88]

My LBZ had an air dog with filter and it was nice, but I don't need or want a lift pump on a work truck. What are you guys useing for a remote mount?

on edit... That system would work fine, napa carry these I take it? I just converted our duece and a halfs to spin on systems instead of the old canister system they had napa had good prices.

 

[Ne-max]

My LBZ had an air dog with filter and it was nice, but I don't need or want a lift pump on a work truck. What are you guys useing for a remote mount?

Would not do a remote filter set up without a lift pump.

 

[blk smoke lb7]

I mounted the filters and pump under the truck and eliminated the top side filter .I installed a fuel Y block and installed a fuel presure gauge in the 1/8 inch tap hole in the top of the fuel block then ran to each cp3.The 1/8 inch hole in the top pf the fuel block can be a bleed point or if your running 1 pump you can use the other port to bleed air if needed but if you pre fill the filter you shouldnt need to blled unless you do injectors.

 

[Big Block 88]

I'm not completely against a lift pump, I just wont be making the power that would make this truck require one. I would just run an old holley unit to keep it on cheep I guess, I dont want to sink a ton of money in a truck that is as tired as this one is

 

[Big Block 88]

wow that is an impressive set up for sure nice work.

 

[blk smoke lb7]

I still run thru the ficm also but i moved mine to right behind the passenger headlite.

 

[Ne-max]

Pump and filters are cheaper then injectors. Its not just the filtration. Its also the positive pressure to the cp3 that helps.

 

[blk smoke lb7]

Thanks,the lift pump will save your cp3.As long as your cp3 is healthy if you add a good lift pump you should never need a cp3 it wont be working that hard then.

 

[blk smoke lb7]

Pump and filters are cheaper then injectors. Its not just the filtration. Its also the positive pressure to the cp3 that helps.

Dam luke,you beat me to it.

 

[Big Block 88]

I agree completely, I'll do a good log on the truck here in the next week or so, and post it up. The trucks runs great but smokes blue like a mad man, no wash down yet in the oil, but under full throttle there is alot of black so I knwo there is just to much fuel, a stocker tune should not be huffin black

 

[Bonestock]

I'm not completely against a lift pump, I just wont be making the power that would make this truck require one. I would just run an old holley unit to keep it on cheep I guess, I dont want to sink a ton of money in a truck that is as tired as this one is

I would like to say a lift pump would help with longevity on the duramax. The fluid dampening on injector nozzles alone should help with a lift pump. I run a lift pump and 550+ tune on my lb7 with lift pump & the injectors have been working perfect for along time. I also run power services cetane booster / stanadyne lubricant to help with injectors & cp3. If you went thru that many sets of injectors I would run a lift pump and a 2 micron filter setup along with plenty of fuel system lubricant......

 

[Big Block 88]

So stock injectors and a good lift pump/remote filter would help me and I agree. But what about oversized injectors? Are they more reliable due to larger holes? I'm getting a strong anti freeze smell so I know my cups are toast also and they will always be a weak link.

Maybe I should find LLY heads and FICM/ECM

 

[Ne-max]

So stock injectors and a good lift pump/remote filter would help me and I agree. But what about oversized injectors? Are they more reliable due to larger holes? I'm getting a strong anti freeze smell so I know my cups are toast also and they will always be a weak link.

Maybe I should find LLY heads and FICM/ECM

Its not the nozzles that fail.

 

[Big Block 88]

UNderstood but if filtration is the issue, would larger nozzles help pass imprureties? Or is the damage done internally? I've never had a CR injector apart so I don't 100 percent understand them?