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Discussion Starter #1
So, looking for longevity reports on the SAC type injectors for LB7s. Who's got 'em installed, how many miles so far and how do they run?

Thanks!!
 

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I have about 20 K on mine so far. I remember read somebody had about 40K & that was a while ago.
 

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Tagged. Looking for insight as well.

02 gmc sierra 2500hd crew cab short bed
3" zone kit
285/70/17 nitto Terra Grapplers
17x9 Raceline 930's
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3" turbo horn
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Just installed them in my truck, truck is stock, so stayed with the SAC 00 units. No complaints at this point. No more hazing at idle.
 

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So, looking for longevity reports on the SAC type injectors for LB7s. Who's got 'em installed, how many miles so far and how do they run?

Thanks!!
have you talked to LDS? they sell them and could probably give you a much better idea of the failure rates they have seen then you will get here due to the smaller sample size.
 

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Discussion Starter #7
Traded posts with Brent about it. They apparently have a company truck that at last report was still going at 150k with SAC 45s. But I was looking for a larger sample size since there is a wide range of how many miles each LB7 gets on VOCs. My truck goes right at 80k. My brother's 2003 goes about 130k and I've seen quite a few folks claim anywhere from 40k - 200k+ and everything in between. Not really sure why the wide range but what I'd really like to see is someone with a ~40k range get 200k miles on a set.

Regardless, if I keep my truck long enough to install another set, the WILL be SAC00s. I already know exactly how far it goes on VOCs as they been replaced 5 times already. The price difference for SAC is just not that much. I was more just curious for some high mileage reports.
 

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Just going to guess an say people running the higher miles have a fass/air dog with a stock filter in place still. An probably do a little cleaner through them, if not every fill up but every other or so.
I just broke 105k miles on my truck an bought with 100k on it, from what I can tell when I bought it no ones touched a thing on it, besides the car filter. I put a fass on it Asap when I got it everything still looks good
 

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Discussion Starter #9
Just going to guess an say people running the higher miles have a fass/air dog with a stock filter in place still. An probably do a little cleaner through them, if not every fill up but every other or so.
I just broke 105k miles on my truck an bought with 100k on it, from what I can tell when I bought it no ones touched a thing on it, besides the car filter. I put a fass on it Asap when I got it everything still looks good
I've watched closely over the years. As far as I can tell, the filter just does not make much of a difference. This is going from results of those that do and those that don't install the expensive filter set ups.

As I said, my brother gets almost double the miles on a set that I do with OEM filter. I think it may have much more to do with where your diesel in refined. Besides his being a GMC and mine being a Chevy, that was the only difference between our trucks for a looong time - till I changed my filter. About to go back to OEM filter because running a different filter made absolutely no difference in mine.
 

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Just going to guess an say people running the higher miles have a fass/air dog with a stock filter in place still. An probably do a little cleaner through them, if not every fill up but every other or so.
I just broke 105k miles on my truck an bought with 100k on it, from what I can tell when I bought it no ones touched a thing on it, besides the car filter. I put a fass on it Asap when I got it everything still looks good
I've watched closely over the years. As far as I can tell, the filter just does not make much of a difference. This is going from results of those that do and those that don't install the expensive filter set ups.

As I said, my brother gets almost double the miles on a set that I do with OEM filter. I think it may have much more to do with where your diesel in refined. Besides his being a GMC and mine being a Chevy, that was the only difference between our trucks for a looong time - till I changed my filter. About to go back to OEM filter because running a different filter made absolutely no difference in mine.
Correct me if I’m wrong but beside the typical fuel stations all across, doesn’t all the fuel begin being made at the same place?
Thinking more on it though it makes more sense, say you have two stations side by side, ones been there for 35 years the other 2 years, obviously you’d think the underground tanks in the 2 year old would be in better condition/less contamination in the tanks/fuel!
 

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Actually most fuel stations have filters built into their pumps or some where else in the plumbing. Those filters are intended to ensure that the fuel they sell meets certain minimum standards. That doesn't mean that the filters are good enough for our purposes though. I worked at a station when I was a youth that had a problem with one of the gas pumps losing prime and dropping to something like 1 gal/min. They tried a lot of things to make it work right including bypassing the filter in the pump for a while.

Eventually they found that there was a leak in the pipe from the tank to the pump so they moved the actual pump from the island to near the tank. That made it pump a lot faster but of course it turned an air leak into a fuel leak. It was putting fuel into the ground for a long time before they dug up the lines and fixed it. You can thank tricks like this for the EPA regulations about double walled plumbing and tanks that can be inspected for leaks. Many of those old stations were not worth refitting with good tanks and pipes so they closed.

It is correct that fuel from most stations comes from the same source. Most diesel, heating fuel, avgas, gasoline, etc comes through a common pipe line from the refinery to the tank farm in the city where you live. There is some separation between different products. They tend to use heating fuel and diesel as separators between different batches but there is always some cross contamination at the start of any batch. It is unrealistic to think that there are 20 different types of gasoline coming through the pipeline.

A things happen to the fuel at the tank farm before it goes into the truck but the basic fuel is from the same refinery.
 

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Discussion Starter #12
Was more referring to local refineries more than stations - although stations are important too - especially when it comes to water. There is a refinery here in Baton Rouge that ALL the local gas and diesel comes from. It's an Exxon refinery that dates back to before WWII. No matter what brand fuel or what station you buy from around here, it came out of that refinery. Probably 90+% of the roughly 30,000 gallons of diesel I've pumped into this truck came from there. My brother, on the other hand, lived in Phoenix and Houston for most of the first ~130k miles (first set of injectors) on his truck. Obviously different oil refineries making the fuel he was buying.

This is about the only real differences I can call out between his truck and mine yet he seems to get ~130k / set of injectors where I get 80k / set. There is also the fact that I towed a good bit more with my truck than he did with his but not sure how much that comes into play either.

Regardless, there is a large range of mileage that people see on LB7s for injector life. A lot of the ones I've seen claim 200k+ miles on factory injectors were completely stock trucks still running factory filter setups with OEM filters.

What causes the huge disparity? I'm not sure but as far as I can tell, it's not Air Dogs and such. I've never seen anyone who could prove that they got 10 additional miles on a set of injectors after installing an Air Dog or what-ever filter system.

What I do know is that the SAC type injectors should pretty much solve the problem.
 

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I've been researching injectors until I'm cross-eyed and have heard nothing but good things about the SAC injectors. I just picked up my '03 from a buddy and it's got 215k on the original injectors and only had an Air Dog for the last 7k miles or so and it's just starting to haze some.

I'm definitely going SAC style, just trying to decide whether to stick with SAC00s or do the SAC45s. Leaning toward the 00s since tuning really isn't in the budget right now. Good to hear some people liking them.
 

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Discussion Starter #14
I've been researching injectors until I'm cross-eyed and have heard nothing but good things about the SAC injectors. I just picked up my '03 from a buddy and it's got 215k on the original injectors and only had an Air Dog for the last 7k miles or so and it's just starting to haze some.

I'm definitely going SAC style, just trying to decide whether to stick with SAC00s or do the SAC45s. Leaning toward the 00s since tuning really isn't in the budget right now. Good to hear some people liking them.
I think you're making the right choice with the SACs. Like I said, I KNOW what the VOCs will do on my truck - right at 80k miles give or take 2 or 3 thousand. Been that way for EVERY set. Sure wish they'd had the SAC ones available 15 years ago! I'd probably still be on my second set.
 

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I think you're making the right choice with the SACs. Like I said, I KNOW what the VOCs will do on my truck - right at 80k miles give or take 2 or 3 thousand. Been that way for EVERY set. Sure wish they'd had the SAC ones available 15 years ago! I'd probably still be on my second set.


Yeah, the more research I do, the worse the VOCs sound. And really, the cost difference isn’t huge so it’s a no brainer


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If you are fixing to sell then the next owner probably won't know anything about injector types so you might as well save a few bucks. If you plan to keep the truck then the SAC injectors are the way to go. They will last long enough to pay the price difference easily and you won't have the labor and down time as often.
 

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So one question for you guys. The SAC injectors clearly are the way to go, but for those running them, if you installed them without tuning, did fuel mileage suffer significantly? I'll definitely be doing them in the spring, just not sure if I'll have funds for tuning at the same time
 

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Discussion Starter #18
So one question for you guys. The SAC injectors clearly are the way to go, but for those running them, if you installed them without tuning, did fuel mileage suffer significantly? I'll definitely be doing them in the spring, just not sure if I'll have funds for tuning at the same time
When / if I do another set of injectors before buying a new truck, they will be SAC00s so no tuning required. But, I have done a lot of reading on the subject and seen a few posts by guys who installed SAC45s or 40s or whatever the number is (can't remember off hand) and they all say the truck ran fine w/o tuning but they did lose some mpg. I think the consensus was that they lost about 2 mpg with the over-sized SAC injectors w/o tuning.
 

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When / if I do another set of injectors before buying a new truck, they will be SAC00s so no tuning required. But, I have done a lot of reading on the subject and seen a few posts by guys who installed SAC45s or 40s or whatever the number is (can't remember off hand) and they all say the truck ran fine w/o tuning but they did lose some mpg. I think the consensus was that they lost about 2 mpg with the over-sized SAC injectors w/o tuning.


That’s not too bad at all. Was just hoping it wasn’t like 5-10mpgs lol


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