Duramax Diesels Forum Truck of the Week
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Old 03-05-2020, 06:19 PM
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Default Beating a dead horse

I am looking into upgrading to sac injectors. I have gotten a few opinions but was hoping to get someone with similar mods to give me a better idea.

I have been looking at doing 65% overs. The current mods are t4 sxe-s366, dual fuelers with 30% overs. I am mostly worried about constant smoke or haze while daily driving as well as towing.


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Old 03-05-2020, 06:37 PM
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What’s your HP goal?
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Old 03-05-2020, 06:50 PM
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Whatís your HP goal?


Probably stay around where I am at currently. Still trying to decide if I want to do a motor with an s3/s4 compound setup later on.


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Old 03-05-2020, 06:53 PM
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Whatís the current largest pulse uS you drive the most on and/or race on?
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Old 03-05-2020, 07:00 PM
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Whatís the current largest pulse uS you drive the most on and/or race on?


Honestly I just switched to unleashed and havenít looked. I am pretty sure my race tune is over 2600us Iím just not sure how much. The last time I dynoíd it hit 805. I usually drive around town on the small tunes to help with smoke and haze.


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Old 03-05-2020, 08:38 PM
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We put SAC45 injectors in my brother's truck (otherwise stock) because S&S was taking forever to come out with the SAC00 injectors, and with a little bit of tuning, you'd never know it had oversize injectors. No issues controlling smoke or haze.

So I wouldn't be afraid to go to at least SAC45. I run SAC75 in my truck and they clean up OK. In that motor I'm fighting the reduced C.R., cam, and a big single, so it is hard to say for sure how clean you could get SAC75's on your setup, but probably not a problem with a bit of effort.
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Old 03-05-2020, 09:11 PM
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Originally Posted by DAVe3283 View Post
We put SAC45 injectors in my brother's truck (otherwise stock) because S&S was taking forever to come out with the SAC00 injectors, and with a little bit of tuning, you'd never know it had oversize injectors. No issues controlling smoke or haze.

So I wouldn't be afraid to go to at least SAC45. I run SAC75 in my truck and they clean up OK. In that motor I'm fighting the reduced C.R., cam, and a big single, so it is hard to say for sure how clean you could get SAC75's on your setup, but probably not a problem with a bit of effort.


Awesome! Sounds like I can count on the 45ís being clean. I would like the 65ís but I canít decide if I am going to battle keeping it clean.. my 30ís I have now have always been Smokey, better with the tunes I have now.

Is there much difference between s&s and Lincoln diesel? I like Lincoln diesels price better lol


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Old 03-05-2020, 09:33 PM
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Quote:
Originally Posted by Antiher03 View Post
Honestly I just switched to unleashed and havenít looked. I am pretty sure my race tune is over 2600us Iím just not sure how much. The last time I dynoíd it hit 805. I usually drive around town on the small tunes to help with smoke and haze.


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That power doesnít seem right for what you have...

But that doesnít have much to do with why I asked lol. Being you are on stock pistons, Iíd go with as much injector as you can afford to keep the big tunes pulse width down low. It will just help prolong the engine.

I daily drove and towed 25k with 100% overs. LLY injectors but those are SAC just like you are looking at. 100% would get you down under 2k uS a decent amount and run like your current race tune at 2600uS
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2002 LB7, LLY, LBZ, LMM, LML, L5P 2500HD CC/LB dmax/6sp alli "The Limo"

2020 L5P 2500HD CC/LB dmax/10sp alli "The New Limo" staying stock........ish

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Old 03-05-2020, 09:46 PM
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Is there much difference between s&s and Lincoln diesel? I like Lincoln diesels price better lol
My brother and I both bought S&S injectors through Lincoln Diesel.
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Old 03-05-2020, 09:48 PM
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Default Beating a dead horse

Quote:
Originally Posted by Chevy1925 View Post
That power doesnít seem right for what you have...

But that doesnít have much to do with why I asked lol. Being you are on stock pistons, Iíd go with as much injector as you can afford to keep the big tunes pulse width down low. It will just help prolong the engine.

I daily drove and towed 25k with 100% overs. LLY injectors but those are SAC just like you are looking at. 100% would get you down under 2k uS a decent amount and run like your current race tune at 2600uS


Yeah, I donít really take those numbers to heart. On that same dyno it was 100hp more than the last tuner.

I trapped 111 with starlite tunes on 2600us which is like 650?. Tried ridge runner for a minute and now with udt. I want to say 3kus now but like I said I havenít looked.

I also live in Utah. the elevation changes towing my camp trailer keeps me from wanting 100ís. Might be okay keeping it in the rpms but Iíd rather not battle it


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Old 03-05-2020, 10:05 PM
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Quote:
Originally Posted by Antiher03 View Post
Yeah, I donít really take those numbers to heart. On that same dyno it was 100hp more than the last tuner.

I trapped 111 with starlite tunes on 2600us which is like 650?. Tried ridge runner for a minute and now with udt. I want to say 3kus now but like I said I havenít looked.

I also live in Utah. the elevation changes towing my camp trailer keeps me from wanting 100ís. Might be okay keeping it in the rpms but Iíd rather not battle it


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650 sounds more reasonable, maybe 700 depending on truck weight and what Blake kicked it up to


I towed from 1100ft to 7500ft. 600hp tune, she played nice but having twins makes the difference. You can only make a fixed vane larger charger ďsmokelessĒ to a point. Realistically you should be downshifting more and using more rpm to keep smoke down when towing. Stay above 1800rpm on that charger.

Bigger injectors wonít make the setup anymore smokier than it is with good larger injectors.... to a point. You go WOT in 5th gear, converter locked at 50mph/1500rpm and itís going to be a smokey mess. But under sane driving conditions, should drive nice
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