363hp with 155s?

OBS F350 · Sep 22, 2014

Srl is a street tune. You want srlxx for best results. And I would suggest a much smaller nozzle 100% on a 155 is retarded.

Also could be a mechanical issue as mentioned, if your tuned monitor ICP voltage the pressure reading is messed up with tuning. You want 4.5v at wot.

94.5 Stroker · Sep 22, 2014

OBS F350 said:
Srl is a street tune. You want srlxx for best results. And I would suggest a much smaller nozzle 100% on a 155 is retarded.

Also could be a mechanical issue as mentioned, if your tuned monitor ICP voltage the pressure reading is messed up with tuning. You want 4.5v at wot.

It has 155/stock nozzle injectors not 100%s

TheReelMuhcoy · Sep 22, 2014

This is kind of a funny topic for me, I've been kicking myself in the a$$ over my build, that I'm not making the power I should be, last year I did 366 on my stock injectors and SCT tune. From what I understood a canned SCT tune on a stock truck would get you over the 400 mark.

Now with my unknown sized injectors/100 nozzles and a Gearheads SRLXX tune I only did 488hp.. I'm 99.99% positive something is wrong with my truck or that dyno I was on both times is a joke. We will find out this weekend when I hit the track.

Luke@MillerPerformance · Sep 22, 2014

94.5 Stroker said:
It has 155/stock nozzle injectors not 100%s

Is the tune written for 155/100s or 155/stock?

94.5 Stroker · Sep 23, 2014

Luke@MillerPerformance said:
Is the tune written for 155/100s or 155/stock?

I believe stock nozzles because the shop who did the injectors also installed the tunes

Luke@MillerPerformance · Sep 23, 2014

94.5 Stroker said:
I believe stock nozzles because the shop who did the injectors also installed the tunes

I would order a fresh tune yourself to be sure.

AirFishAutomotive · Sep 23, 2014

TheReelMuhcoy said:
This is kind of a funny topic for me, I've been kicking myself in the a$$ over my build, that I'm not making the power I should be, last year I did 366 on my stock injectors and SCT tune. From what I understood a canned SCT tune on a stock truck would get you over the 400 mark.

Now with my unknown sized injectors/100 nozzles and a Gearheads SRLXX tune I only did 488hp.. I'm 99.99% positive something is wrong with my truck or that dyno I was on both times is a joke. We will find out this weekend when I hit the track.

How do you not know what size injectors you have?

crash86 · Sep 23, 2014

swinky said:
You have a faulty turbo or boost leak. I was making 450hp with tune and exhaust. Stock intake and fuel system.

Who's tunes were you running?

OBS F350 · Sep 23, 2014

94.5 Stroker said:
It has 155/stock nozzle injectors not 100%s

You are much better off with 155/stock. And I would make sure it is not just a street tune before getting too crazy as I stated srl is just a street tune. Srlxx is full fuel race file. Trap speed put my truck just below 500 with 190/100's running the srlxx. Also while not holding ICP.

TheReelMuhcoy · Sep 23, 2014

AirFishAutomotive said:
How do you not know what size injectors you have?

Because I haven't had them flow tested...

I am guessing that they are between 200cc and 215cc

OBS F350 · Sep 23, 2014

TheReelMuhcoy said:
Because I haven't had them flow tested...

I am guessing that they are between 200cc and 215cc

Does your truck hold ICP above 4v?

TheReelMuhcoy · Sep 23, 2014

When I first built them I saw no difference with ICP. This past weekend I made the barrel about .20cc larger. I still make full ICP, around town, but it does not build as fast as it used to. I also have not yet had the opportunity to take the truck out on the highway to see how it does on a WOT run. We will see what happens this weekend at the Maryland/Innovative event.

Bad_company · Sep 24, 2014

I've noticed that i won't build over 25 pounds with 155 stock. At wot between 65 and up the trick seems to cut out real fast.... I haven't gotten numbers on ICP or anything yet.. I'll post them as soon as im done

Mdub707 · Sep 24, 2014

Without ICP numbers or track times, all we have to rely on is dyno info and we all know they can be made to read whatever you want.

Not trying to discredit the dyno, but at least get a second opinion here and see if they match. If track times are showing better power, then you know the dyno is probably off. If ICP numbers are dropping hard, the dyno may be right....

Bad_company · Sep 24, 2014

All numbers checked out good... Only thing I forgot to check was trans temp to see if the tc is going. I'm gonna call Matt at gear head and have him wrote me a different tune to see if that helps

OBS F350 · Sep 25, 2014

Would be the first thing I would do before throwing parts or getting fed up with it. If it is only the srl file it is nowhere near an aggressive tune (for a studded truck, at least)

Mdub707 · Sep 25, 2014

Even a normal street file with stock injectors/turbo should still be at least 365hp... I would think he should be above that just on a tune alone. Of course, unless something is wrong.