New Turbo installed - What should I expect?

[WRLIVE]

Hey guys,

I just got my Super B installed along with the new BD exhuast manifold. Everything seems to working fine. Truck drives just as it did before. I've got a hundred and some miles on it at this point and there is no wow factor. Are my expectations skewed? If I stand on it my display won't go over 19 lbs. Truck produces no black smoke either. Is it my Bully Dog that is limiting things? What am I missing? Thanks for the help,

 

[JJPage]

If all else stayed the same, there is no reason to believe the new turbo would change anything powerwise. If you add more fuel the Super B may be able to maintain lower egt's than the OEM HE341, but very doubtful it will create more horsepower. The new manifold and turbo will be more efficient, so you may be able to up your fueling and maintain safe exhaust temps(allowing more usable hp), where your factory setup would have made egt's too hot.

Hopefully BD didn't sell you these components promising you more power... .

 

[rscurtis]

IIRC from a past article by Joe Donnelly, there is a slight power increase due to reduced back pressure, which will also net a FE increase. That boost number seems a little low, my signature truck will get to 22-23 PSI. I lowered the WG opening pressure from 45 PSI where BD had set it to 26 PSI, where the tension was just removed from the WG poppet valve but it hadn't actually started to open.

 

[WRLIVE]

Thanks for the reply,
I bought the turbo for several reasons, one of which was more useable power. I am prepping the truck for towing a camper mainly in the mountains and am trying to find the right combination of parts. One thing I am confused about is the fact that I cannot get more than 19 lbs of boost. I thought this turbo was set to actuate the waste gate at 40 lbs give or take. I may need to add more fuel. I am planning on replacing my BullyDog with an SSR this summer so it can be dialed in appropriately on the dyno.

 

[BigPapa]

The waste gate is releasing drive pressure, not boost. Drive pressure will most always be higher than boost pressure.

 

[cerberusiam]

Before you get too worried get a real boost gauge on it, not the Outlook monitor. You may actually be making the correct boost but the monitor is not reading correctly.

 

[AH64ID]

I would guess it's the outlook that is mistaken. OBDII readers are limited to 37 psia for boost, subtract ~14. 7 for ambient pressure and the corrected max at sea level is ~22 psi, give or take a few psi of error on a MAP sensor and there is your 19.

You may get slightly more power at the very top end due to less back pressure, but turbo's don't add power.

 

[Bill Weber]

I hope you have better luck than I did. At 1900 RPM=70 MPH boost = 4#. Could get 29# @ WOT at 100MPH. In all cases EGT's were 200F+ over stock turbo. BD said nothing wrong with turbo. Let them have it back.

 

[JJPage]

I hope you have better luck than I did. At 1900 RPM=70 MPH boost = 4#. Could get 29# @ WOT at 100MPH. In all cases EGT's were 200F+ over stock turbo. BD said nothing wrong with turbo. Let them have it back.

That had to be disappointing. Was it a Super B?

 

[rscurtis]

Where are you measuring EGT, in the manifold, or in the exhaust elbow? If it's the elbow, EGT will be higher with the BD because of the lower pressure in the exhaust manifold and the lower pressure drop across the turbine section. My truck runs at 2-3 PSI at 65 MPH, that's less than half of where the stocker ran. Keep in mind that at light-load situations like this, the engine doesn't even need a turbo, it's just a restriction in the exhaust. Running big boost numbers all the time just wastes fuel supplying the engine with air it doesn't need- witness the poor FE of the 6. 4 Ford engine which was regularly running 20 + pounds of boost with its twin turbo setup.



There is no way I would put the stocker back on after having the BD.

 

[Bill Weber]

Yes, it was a Super B. Measuring EGT in the manifold just as before. rscurtis: my boost pressures were similar to yours. But, with 200F higher EGT's it showed the turbine was not pushing much air. With a cattle trailer of cattle, going up hill, all I could get was 8#. EGT's of 1050+. Had never been near that high with the stock turbo. Plus there was a very noticeable lack of power just taking off from a stop. If you think you don't need a turbo under light loads just adjust the WG to wide open all the time and see what you think.
Bill

 

[CToney]

What does your turbo you have now do? With the mods you have now your truck probably won't notice the trailer behind it. My 351 does the trick for me. I rode in a buddy's '07 auto with Bullydog programmer and wasn't impressed. A lot of noise, 5" exhaust and CAI, 3000 rpm up hills I take at 1800rpm in 6 th gear with my truck pulling more weight. He has 35" tires too.

 

[MChrist]

When I went from the factory turbo to an Aurora Plus 4000 compound setup, my power was exactly the same according to my 0-60 times. The difference was that the extra air allowed me to add more fuel which makes power. Using a Smarty Jr on performance setting (100 hp), my truck used to leave a trail of black smoke. Now with the twins and Smarty S06 on more than 50% more fuel, my second turbo is allowed to do its thing, run 0-60 in one second less time while leaving no black smoke behind me.
Some people say more air doesn't make more power which is true if you already have enough air to burn the fuel. If you are leaving black smoke in your wake, more air will help to make more power in that case.
Easiest way to get an accurate boost reading is to get a stand alone boost gauge and run it it a "boost bolt" on your intake manifold. I bought mine from www.genosgarage.com It's basically a hollow bolt that you can get boost reading from.
I'd be interested in what you find.
I also noticed that your signature states "soon to have" built trans... if your power deficit gets solved, you may need a built transmission sooner than you think!!
Good luck.