Split shots (AB's) (AD's) - Ford Powerstroke Diesel Forum
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post #1 of 106 Old 04-10-2011, 09:22 PM Thread Starter
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Exclamation Split shots (AB's) (AD's)

Who is running a split shot injector in their OBS 7.3?

I'd like to hear the particulars of the swap.

I.E.

Who tuned it?

Did you just swap to a California PCM?

High Pressure Oil issues?

Trying to nail down a good "how to" thread, to take away some of the myths about this, for once and for all.

So post up!

Thanks!
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post #2 of 106 Old 04-11-2011, 11:12 AM
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I'm running a set of re-man AD's(unknown mileage,only know the bus had 114k total) on a bone stock non-cali truck. I just pulled the AA's out and threw the AD's in. The truck lopes and smokes(black smoke) at start-up everytime, but i'm leaning towards a weak stock HPOP causing that. Once that smooths out the idle is pretty good. It doesn't have much low end power, again weak stock HPOP, but its not much worse than the stock injectors. But once i get above 2k RPM's i think it runs stronger and better than stock. IMO its a lot quieter also.

The only thing that bugs me is it cackles, again i believe from tuning and HPOP issues. Once it does start making power i can't hear the cackle, but espeically at low RPM's its noticeable.

I do have a stock 17* pump, which i may or may not get modded, and i'm hopefully going to get tunes in the next week or two. But for now i'm driving it the way it is.

Here's a video, and i have more on my page.



BTW, this is a good sticky. I read around a lot on different Powerstroke sites(mostly here and PSN), trying to find out about running splits on single tuning. Basically i found out it will work, but each truck seems to run different. So i put my injectors in not knowing what would happen, or if it would even run.

Jimmy
97 F-250 ECLB 7.3/E4OD/4wd, 216k miles: FFD 250/200%'s, stock turbo, built trans, e-fuel, Swamps IDM, shimmed 910's, Melling LPOP, welded cam gear/modified pick-up tube. Built and tuned by me
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post #3 of 106 Old 04-11-2011, 11:38 AM
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derek says to run the splits on stock tuning.

2006 Ford F250 CCSB FX4 6.0

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1997 F350 CCLB 2WD 7.3
1999 F350 CCLB 4WD 7.3
2003 F350 CCLB FX4 6.0



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post #4 of 106 Old 04-11-2011, 06:52 PM Thread Starter
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Quote:
Originally Posted by Jarrod B View Post
derek says to run the splits on stock tuning.
I don't know a tuner named Derek.

Not tryin to come off like an azz, but I'm tryin to get the cold hard facts compiled, not the internet facts.

Literally every non Cali OBS I know of that's runnin splits has had fits gettin truck to run right. Both with tuning, and without tuning (obviously).
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post #5 of 106 Old 04-11-2011, 06:56 PM Thread Starter
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Quote:
Originally Posted by JD3020 View Post
BTW, this is a good sticky. I read around a lot on different Powerstroke sites(mostly here and PSN), trying to find out about running splits on single tuning. Basically i found out it will work, but each truck seems to run different. So i put my injectors in not knowing what would happen, or if it would even run.
Thought I'd try to nail it down for guys that want to do it.

I'm hoping to get some information from a few tuners or other professionals in the field.

Benefits of splits in my opinion are what you're describing. Quiet/smooth operation.

Power and mileage goes to singles usually, though there's really no reason why splits can't get every bit of the mileage singles can.

So, for a guy that needed no more than 300HP out of his OBS, and wanted a quieter more pleasant truck to drive, splits could be a good OBS mod.
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post #6 of 106 Old 04-11-2011, 07:10 PM
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Yeah, or people like me that need injectors and find a good deal on splits. Which if i wouldn't have bought my spare motor i'd be running 2's or hybrids right now instead of splits, but running these is a much better option financially.

I tried sending an e-mail to Matt@Gearhead tonight to set-up ordering my chip, but my e-mail is messed up. So tomorrow i'm gonna try to give him a call and see what he thinks about it. I'll post up what i find out.

Jimmy
97 F-250 ECLB 7.3/E4OD/4wd, 216k miles: FFD 250/200%'s, stock turbo, built trans, e-fuel, Swamps IDM, shimmed 910's, Melling LPOP, welded cam gear/modified pick-up tube. Built and tuned by me
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post #7 of 106 Old 04-24-2011, 06:27 PM
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Just to clear up any doubts, split shot injectors with good split shot tuning in a OBS work great! My truck runs extremely strong, and my brother says its twice the truck his TW tuned OBS with stock injectors was. I still have a slight cackle at lower RPM's, and between 1500 and 2k RPM's the motor has a bad shake when i'm on the throttle. I think the cackle is either low fuel or HPO pressure(17* pump ready to go in), and i think the shake is from the injectors themselves. They are used, out of a motor that i never saw run, and i have no clue how many miles are on the injectors so it doesn't surprise me. But other than that these injectors are awesome for a budget repair/performance mod.

Jimmy
97 F-250 ECLB 7.3/E4OD/4wd, 216k miles: FFD 250/200%'s, stock turbo, built trans, e-fuel, Swamps IDM, shimmed 910's, Melling LPOP, welded cam gear/modified pick-up tube. Built and tuned by me
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post #8 of 106 Old 04-24-2011, 06:30 PM
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You need to tune to run splits in an obs to get the full potential. Swamps can do it I am almost positive.

2002 f250 BFT Edition
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post #9 of 106 Old 04-25-2011, 04:21 PM
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I'd say almost any tuner can do it. Like i said i had matt@gearhead do my tuning and it runs great. I've read on some different sites that even with the right tuning OBS trucks don't run right with splits. And other than the cackle my truck runs great.

Jimmy
97 F-250 ECLB 7.3/E4OD/4wd, 216k miles: FFD 250/200%'s, stock turbo, built trans, e-fuel, Swamps IDM, shimmed 910's, Melling LPOP, welded cam gear/modified pick-up tube. Built and tuned by me
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post #10 of 106 Old 04-25-2011, 07:59 PM Thread Starter
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Quote:
Originally Posted by JD3020 View Post
I'd say almost any tuner can do it. Like i said i had matt@gearhead do my tuning and it runs great. I've read on some different sites that even with the right tuning OBS trucks don't run right with splits. And other than the cackle my truck runs great.
Cackle and shake...

I really wish you had a good set of AB's in there, every OBS 7.3 I know of runnin splits without a cali PCM has some weird quirks that the owner works around.

Glad it's running good enough to use though!
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