01 7.3L PSD Airflow Noise Inquiry
 

So after having my 4R100 completely rebuilt to complete billet specs I have been able to put down alot more of the power within Jody's 120HP setting on his F5 chip. Last night the woman and I were out to dinner and we took my rig for once and after leaving the food joint I kinda got into it around a turn and into a straight away. Well I've noticed more and more lately that I've began to hear more "turbo bark" sounds but last night I started to hear what sounds like a distorted airflow/almost hissing between 45 and 65mph (highway speeds) when I gradually put my foot back into the throttle.

I have no DTC codes, no loss of boost, EGT's are well within their normal operating parameters and no real noticable loss of power. Everything seems normal except for that damned sound.

My thoughts when I got home were to check my turbo piping/innercooler lines & airfilter (which needed cleaning). I tightened all of the couplers that I could manage to reach and they seemed to tighten a little bit but not a whole lot.

My thought diagnosis wise would more than likely be either......

1) Waste gate took a dump

2) Torn coupler that I cannot see

or

3) Blown head gasket (though HIGHLY doubtful with the amount of miles on my rig and I'm very gentle normally).

Truck basics:

2001 F250 7.3L PSD, 4R100, 117K miles, complete AMSOIL synthetic fluids since 108K, Airaid intake, Silverline 4" turboback exhaust system, DP F5 chip & lifted 6.5" on 37"s.

Thoughts? Suggestions?

Thanks in advance

Bill

The Only That Strikes Me As Odd.. Is That It Happens During A Certain Speeds, Not RPMs.

Your 100% Sure Its Coming From The Engine Bay?

120% certain it's coming from within the engine bay. I'd say probably 85% certain from the turbo.

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Well since I'm a somewhat noob to the turbo world I didn't know what surging sounded like. I also left out a little piece of intel that was somewhat important as well......

After having my tranny built to stage III billet specs my builder (Jim@ATO/Rancho Cordova, CA) suggested that I grab a Banks Trans-Command module just to up my line operating pressure a tad bit more to get optimum performance from my new tranny. The surging really only started shortly after I installed the Trans-Command module.

So next up is an ATS housing and a Wicked Wheel. Then a "Technicooler" and then I'm DONE with this bitch!

the trans command should have nothing to do with it, if your getting turbo surge you should see it in the boost gage. you should see bouncing in the needle, if you do change the housing put on a TurboMaster wastegate controller instead of the stock one.

Surge... ATS housing will fix it... Wicked wheel might...

doesn't jody's chip already raise the line pressure to the trans??

Yes he does, unless you ask him not to.

You can run the stock waste gate with the ATS housing correct?

yes you can, I put the ATS housing on my truck and just pulled about a 10,000 lb load from Colorado to Missouri. no surge at all, the nice thing with the TurboMaster is you can adjust it.

this is kinda off subject but im a noob and i dont know how to start a new thing bt how can i turn upmy 7.3 turbo i little just by turni n a few screws a little and not spend hardly any money?? please let me know