Stock-fueled trucks step on in...

[DoghouseDiesel]

The most I run through a stocker is 35 - 38 psi.

Anything beyond that is outside the efficiency map and isn't doing anything for power or charge temp.

Besides that, the shaft is pencil thin. Bark it one too many times up there in the 40's and you'll be finding pieces of the compressor in you intercooler and the turbine wheel is likey to do a number on your down pipe.

[2007 5.9]

Rich, I almost completely agree with you...except we've dynoed with a stock turbo AND have seen moderate hp increases up to 45psi.

Is it smart...no...is it gonna wipe the turbo out eventually..yes.

Charge temps were hotter but she still made more power.

[DoghouseDiesel]

Yeah, it'll make a little more but I look at usable power vs dyno power.

What something makes on the dyno doesn't necessarily mean it can do anything useful at that power level.

This is why I don't put much stock in in anything over 40 - 60 hp from the stocker.

That and the drive pressures are rediculous.

I always like seeing the guys that go, "Man, my truck does 475 on the stocker...".....really? Go hitch up to that trailer over.

[Dmaxink]

We made the most power at 42lbs..however, I commercially sell the tunes only making 38...I sleep well at night doing so.

[TexasCummins]

What would y'all recommend as far as a safe top end main duration on stock injectors? I've hit 2600us no problem but would like to bump it up to ~3000...

And Kory I got the wastegate maxing me out at 38psi without the use of a fooler, thanks for the help

[2007 5.9]

As long as your rail can keep up..3000-3300 is about tops.

[someguy]

Practically speaking (the tuners might correct me here), but I don't think there is any benefit, remember that commanded fuel table is being used to reference back in to the pulse table. If you are wanting some control over the pulse time at higher than normal commanded mm3 then you could up the axis on the pulse table to 160mm3 so you have some control on the pulse time up there.

I always wondered about that. Thanks for replying.

[someguy]

The BW 63/68/.88 T-4 that Andrew is going to use, I have recommended to several customers with GREAT results.

It spools very fast, very responsive (with proper tuning), and will support 630-645hp with reasonable egts.

Plus it's 1/3 the price of one from a major turbo outfit.

Generally the cost comes out to be...$500 for T-4 manifold, $750 for turbo, and approx $250 for misc things (downpipe mods etc)

But for $1250-$1500 you essentially get the BD Killer B but without BD ever touching it.

I don't plan on ever running brand name turbos anymore. I've ran almost everything under the sun on my truck...I tried a off the shelf BW....and have been all smiles ever since.

Now that's all I recommend to my customers. With a proper tune and reasonable expectations, you don't need to be running a T-3 wastegated turbo with super tight exhaust housings.

Tune it so the turbo lights fast, and have fun in top.

All you get when you tighten up the housings, is muffled top end from being choked out.

Amen, brother !

[someguy]

I always like seeing the guys that go, "Man, my truck does 475 on the stocker...".....really? Go hitch up to that trailer over.

Agreed !

This is an awesome thread.