Hey all. First post here and seeking advice. For starters-I’ve spent HUNDREDS of hours on every 7.3 forum/thread/post on this topic. I cannot find exact opinions on my particular issue, especially with all the options available to us now in 2024.

I have a one-owner low mileage e99 with stock AB injectors and turbo. I recently rebuilt the turbo w/ 360 bearing kit and a Riff Raff billet wheel. I have a Hydra and multiple tunes. (PHP canned tunes shifted weird in the mountains at highway speed and low throttle….had to buy custom tuning.) 4” exhaust and 6637 intake round out my mods. 4r100 is stock and I know it’s going to die with any more power-will run it until that point.

My goal-400ish horsepower. I’m not stuck on this exact number. I just don’t think I’d be fully satisfied with 160/0 injectors, knowing myself. I want a reliable 400 hp pickup that I can daily drive and tow with. (And have fun…) I will be towing 5-10,000 occasionally and very rarely (maybe once a year) up to 15-20,000 in hay or grain. We have a 6.7 that would take priority for any towing that heavy.

My thoughts-I’m torn between 180/30s and 205/30s. On one hand, I will likely need an HPOP and Stage 1 KC turbo for 180/30s. On the other, I would likely need a Stage 2 KC turbo but no HPOP for my goal. I would try to get away with my stock turbo for a while by de-tuning with either option. (I know the consequences of that but I have fat hands and I JUST had to deal with hooking the turbo back up!) Would stock fuel system get me to 400? Either way, that’s a moot point when it comes to injectors. I want to take whichever route will be the cheapest 400 hp option, but if 205/30s will make that heavy of towing impossible…then I’m out. If you were me, what would you do? Is there something I’m missing?

 

This is probably the best info here on everything HEUI injectors. Loads flow testing data on several injector options.

https://www.ford-trucks.com/forums/1...ispreloading=1

 

160/30 would be a good option, or if you want more future power potential, jump to a 200/30 hybrid and just run lighter tunes. I would lean to the small hybrids because they have a better chance of maintaining icp with the stock e99 hpop.
For full power use of 200/30 you will need mods in terms of hpop, turbo, transmission, fuel system, valve springs/pushrods.

 

The poll didn't contain my set-up....160/30's.

 

What is your trucks gear ratio?

I have an e99 , f350, zf6 manual, drw, 4x4 with 3.73 gears. I was in this spot myself, 90% used for towing toyhauler campers. I bought 205/30 remanned hybrids from full force diesel ( never again) and then had to buy new ones from a reputable company, Bitterroot. Cnc, rosewood or Bitterroot imo.

Kc turbo didn't offer a drop in for my e99 when I started all the mods. Went 205/30, adrenaline hpop, sxe 366/.91 exh turbo, hydra tuner and already had the rx fuel re route with fuel reg, exh, intake etc. Wound up with 4 bad ffd inj's so bought 8 new from Bitterroot and swapped the sxe 366 out to a sxe 363 both .91 exh and and now .83. The truck will run 40 psi boost, in tow mode, if I let it. My truck feels like it makes good power while pulling a camper or a 28 foot gn flat bed. Having done all of this, having said all of that, if I were starting over.... I would buy a drop in kc turbo, adrenaline or cnc hpop, hydra tuner and re gear the truck to 4:10 or 4:30's, keep the stock split shot inj's. They idle the smoothest and quietest imo, you don't need a tuner to run the truck. I'm betting 350 on stock unj's with those supporting parts is possible.

With canned php tunes and my stock e99 turbo, on stock 100 k mile inj's I saw 29 psi while towing a hill. Egts would begin to climb because the e99 turbo doesn't breathe well on top end where the drop in kc will.

if you need 400 hp, 200/30's , 205/30's and all the supporting mods.

 

I'm also running 160/30s. Along with a kc stage 1 drop in turbo.

 

Ok…I had ruled out the 160/30s because many people say the jump to 30% nozzles aren’t worth it over stage 1s. Should I be considering 160/30s? Are they nearly as oil hungry as 180/30?

 

This is the route I took. Stock injectors, 4.30 gears, upgraded turbo, and a Hydra. Tows 12-14k all the time, no problem at all.

 

I can't really comment on wether one uses more hpo or not. I can say that my tired e99 hpop mostly kept up with the 160/30's except on long or steep hills. I can also say that the tuning will make as much or more difference of the power felt and I assume delivered. Also last I knew Gearhead was incapable of tuning e99 so you may want to do your homework on tuners. I ended up getting JeliBuilt tunes, but still keep the Gearhead's saved in a file somewhere for when I need reminded what slow feels like.

 

This would be my vote as well after 10 years of towing heavy cross country.

No vote option for KISS though...

KISS = Keep It Simple S....

 

same here.....and very happy with this setup. Using PHP Titan Unlock tunes....nobody else could get the shifting right for some reason.

 

Before trying to put more fuel into it with bigger injectors, you might consider concentrating on more air. The e99 has smaller intake plenums and other pieces. I can't remember if the e99 also still had the 15* or the later 17* HPOP. I will also agree with a couple above which stated they stayed with stock injectors, I even have a set of stock 35k mile injectors sitting on the shelf when the time does come. I fixed the leaks on the up-pipes and down pipe on the Excursion along with a Riffraff billet 4+4 compressor wheel on a low mileage turbo...so no rebuild...plus some other maintenance items. My F350 didn't have the exhaust leaks, but I went ahead and installed the stainless bellowed up pipes like the Excursion got since the turbo was out doing other maintenance items like the Excursion. The turbo that went back in got the same compressor wheel as the Excursion, along with the 360* rebuild kit and the KC Turbo s300 exhaust turbine wheel. This has been a big improvement in alot of ways without sacrificing mpg and/or reliability. When it comes time to rebuild the turbo in the Excursion I'll probably do the KC exhaust wheel too. I just took the first road trip down to south Texas over the weekend in my F350 and I was getting better mpg and we'll see in another couple of months when I need to drag the tractor down there.

 

and the rt i would go if I was to do it over.

 

I dont think I could ever go back to stock injectors after getting used to the hp I have

 

KISS = Keep it simple Sous!