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Dangle

Tuning with bigger injectors.

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Josh and i ran em a little today and we found something interesting, i was running 2214us and his stock tune hits 1400us with the new sticks. Josh and i ran neck and neck, the 2214 tune runs 14.4 @ 94mph and probably low 400hp. I think injectors may be a important key to keeping the pulse width lower and the timing less while keeping the spray pattern inside the piston bowl. I think this could really help with the piston issues, just because we can run 600hp with stock sticks does that mean we should push them that far.....

Thought from the rest of the guys??

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Guest ShanesLB7
Josh and i ran em a little today and we found something interesting, i was running 2214us and his stock tune hits 1400us with the new sticks. Josh and i ran neck and neck, the 2214 tune runs 14.4 @ 94mph and probably low 400hp. I think injectors may be a important key to keeping the pulse width lower and the timing less while keeping the spray pattern inside the piston bowl. I think this could really help with the piston issues, just because we can run 600hp with stock sticks does that mean we should push them that far.....

Thought from the rest of the guys??

That's pretty interesting....:hi5:

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The injectors do seem to be the culprit. I was talking to a guy on DP and he said That in addition to my airdog that I should be running two high efficiency CAT 2 micron filters. I think you'd be fine with just one though. what I got from his theory was that diesel is the dirtiest fuel out of the pump, and even though the injectors might not be completely blocked off they are clogged enough to affect the spray pattern. He also sent me some pics of lb7 injectors that were badly clogged that only had like 60k on em.

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uS is micro seconds. Basically, 1400 uS means the injector stays open for .0014 seconds. I think that's right, I'll have to check to be sure.

I just checked and what I wrote is correct. To clarify, it isn't uS; it's µS.

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The down side to larger injectors is they create higher peak cylinder pressure because you are putting more fuel in in a shorter amount of time. The up side is lower egt's and higher hp.

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I have injectors going in this week. I have tuned quite a few trucks now with injectors and they seem to perform well. I'm not sure that the LBZ pistons will live with injectors, but I'll be putting them to the test in the next few weeks at the track.

Should be good comparison since I have so much data from stock sticks on the track.

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I have injectors going in this week. I have tuned quite a few trucks now with injectors and they seem to perform well. I'm not sure that the LBZ pistons will live with injectors, but I'll be putting them to the test in the next few weeks at the track.

Should be good comparison since I have so much data from stock sticks on the track.

Have you started your "race" engine LBZ build yet?

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