Which injectors?

DocBar · Mar 1, 2014

I'm giving my brother my 250/100's ( he's sending them in to FFD to be freshened up and resized), my 38R and DI uppies. Other than a CAI and gauges, his truck is a bone stock 2001 CCLB auto 4X4.

He's looking to stay below 400rwhp for reliability reasons and plans on adding a PI TC and BTS valve body to his tranny. The truck has 360,000 miles on it.
Matt R will be his tuner.

Any advice on what size injector he should go with?

PSD POWER007 · Mar 1, 2014

My PIS 175/80's seem like a great combo with the 38r at those HP levels. EGT's are tame when towing too!

mustube · Mar 1, 2014

175/100s. I have some with Gearhead tunes, and my truck is an absolute blast to drive compared to stock. Has great power for passing and merging into traffic. Even with my 37s, I can roast the tires from a roll.

psduser1 · Mar 1, 2014

I like my setup, in sig, I don't know a number, but it does everything a towrig needs to do, and well. I routinely pull over 14k, with no problems. Egts are nice, plenty of power on Matt's tunes.

DocBar · Mar 1, 2014

PSD POWER007 said:
My PIS 175/80's seem like a great combo with the 38r at those HP levels. EGT's are tame when towing too!

mustube said:
175/100s. I have some with Gearhead tunes, and my truck is an absolute blast to drive compared to stock. Has great power for passing and merging into traffic. Even with my 37s, I can roast the tires from a roll.

Are you guys running a stock 4R100 or have you upgraded it?

psduser1 said:
I like my setup, in sig, I don't know a number, but it does everything a towrig needs to do, and well. I routinely pull over 14k, with no problems. Egts are nice, plenty of power on Matt's tunes.

What injectors are you running?

mustube · Mar 1, 2014

I have a stock rebuild with a billet dacco converter and a 6.0 cooler. Never misses a beat except for my broken intermediate shaft but I think that was a product of my truck being abused by the previous owner.

Sent from my XT1058 using Tapatalk

PSD POWER007 · Mar 1, 2014

I'm still stock with a Johnny Lightning valve body, 6.0 tranny cooler, and clean Mercon V. Tranny runs and shifts great.

JD3020 · Mar 1, 2014

If they are already 250/100's i wouldn't mess with em, other than maybe go to an 80% nozzle.

DocBar · Mar 1, 2014

JD3020 said:
If they are already 250/100's i wouldn't mess with em, other than maybe go to an 80% nozzle.

With the power level he's wanting to be at, I'd just as soon change them. He's in his 50's and will never want more power. The only reason he's doing anything at all is due to the stock turbo surging and I'm giving him the stuff.

Dieselboy. · Mar 1, 2014

I wouldn't change them at all. Be a waste of money.

One could easily write a do all smoke free 400hp tune. Just have to limit PW. And fuel vs rpm.

DocBar · Mar 1, 2014

Dieselboy. said:
I wouldn't change them at all. Be a waste of money.

One could easily write a do all smoke free 400hp tune. Just have to limit PW. And fuel vs rpm.

I've been thinking on that and think I'll leave it up to Matt's recommendation. Go with whatever he would rather tune.

d7es3l · Mar 2, 2014

Damn, I wish my brother gave me truck parts! That's awesome

DocBar · Mar 2, 2014

d7es3l said:
Damn, I wish my brother gave me truck parts! That's awesome

Payback for scuba training and aerobatics training. My brother is most awesome!!!!

lincolnlocker · Mar 2, 2014

Dieselboy. said:
I wouldn't change them at all. Be a waste of money.

One could easily write a do all smoke free 400hp tune. Just have to limit PW. And fuel vs rpm.

This for sure! Have them detuned for whatever purpose he needs.

live life full throttle

JD3020 · Mar 2, 2014

Yep, shouldn't have an issue tuning it to be exactly how he wants it. Hell i have no clue what i'm doing, but i'd say my truck is in the 375-400hp range with a D66 and smokefree, so it can't be that hard. LOL

Dieselboy. · Mar 2, 2014

Hell. I wrote a tune that makes my 450/400s smoke free.

100% nozzle. Piece a piss for Matt

DocBar · Mar 2, 2014

JD3020 said:
Yep, shouldn't have an issue tuning it to be exactly how he wants it. Hell i have no clue what i'm doing, but i'd say my truck is in the 375-400hp range with a D66 and smokefree, so it can't be that hard. LOL

Dieselboy. said:
Hell. I wrote a tune that makes my 450/400s smoke free.

100% nozzle. Piece a piss for Matt

Thanks for the advice, guys. I will talk to Matt and see what he thinks. I'm not against leaving them where they're at, I just want them to be perfect for what my brother is looking for.

:thumbsup:

psduser1 · Mar 2, 2014

Hey doc, mine are 160/100s, but as long as there is no mechanical problems, I'd leave yours be, like everyone else is suggesting. The nozzle is the physical limit, and a 100% nozzle is fairly common now. Matt wrote my tunes, for a manual trans obviously, but the power side is just fine. On the tow tune, its almost smokefree, except on the very bottom. Once the turbo is lit, its as clean as anything else on the road. I usually use his hot street tune to tow with, and I can push egts to 13ish, but that's with a lot of weight! All this on the first try, never needed to send the chip back for any tweaks.
Rock what you got, the tunes will make it easy.:thumbup: