ok, someone help me settle this debate
FTE *******
Joined: Jan 2004
Posts: 112
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From: Washington
The surge under load will occur when the trucks air flow has been altered and the computer chipped for more performance because it creates a situation where the turbo is out of its performance curve. This has to do with exhaust drive pressure on the turbine side of the turbo verse the compressor side. When the compressor side has enough pressure (boost) to overcome the exhaust back pressure (drive pressure) on the turbine, then the turbo slows down and boost pressure can flow backwards towards the intake. Once the pressure on the compressor is reduced in relation to the drive pressure the turbo spools forwards causing the other half of the surge. The compressor wheel or housing reduce the drag on the compressor side thus solving the problem.
Senior User
Joined: Oct 2006
Posts: 108
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From: South Carolina
Yes thanks guys, I have this same problem on my 03 and Im debating on which method I will use. I am leaning towards the WW. I had some questions about theory as well and this thread explained it. You guys are great!
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
The I guess all the sites selling it are lieing. They all advertise the following:
* Increase Airflow
* Lower Exhaust Temperatures
* Increase Low-End Throttle Response
* For use in 1999.5 - 2003 7.3L Ford Powerstrokes
* Increase Airflow
* Lower Exhaust Temperatures
* Increase Low-End Throttle Response
* For use in 1999.5 - 2003 7.3L Ford Powerstrokes
David they are kinda true:
At lower rpm's it spools up faster and does move more air quicker but it will typically produce 2-3psi less boost at the topend and this is where the lower EGT's come in
At lower rpm's it spools up faster and does move more air quicker but it will typically produce 2-3psi less boost at the topend and this is where the lower EGT's come in
The way I understand it is that the WW overall is less efficient than the stock compressor wheel, because of every other vane is halfed. The advantage that the WW does have over the stock is that with the design of alternating blade sizes, it actually "cuts" into the air better at lower rpm's, which is why you have a quicker response in the low end. The efficiency range of this is cut short at higher wheel speeds, which is why you actually lose boost on the top end.
In other words, as the compressor wheel spins slower, the large and small blades grab the air better than a wheel with all equal length blades But as the wheel speeds up, the smaller blades lose the ability to grab air on the WW.
Post Fiend
Joined: Jul 2005
Posts: 14,582
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From: 21791
I just spent a half hour thinking and typing my viewpoint. I went to enter it, and the error 404 message came up. I went to hit back to retrieve what i wrote, sure enough it wasn't there. I have my opinion to voice but obviously im pretty heated and it's not going to be for a while.
Thread Starter
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Elder User
Joined: Oct 2004
Posts: 916
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From: Hazelton,BC Canada
Originally Posted by strokin_it7.3
I just spent a half hour thinking and typing my viewpoint. I went to enter it, and the error 404 message came up. I went to hit back to retrieve what i wrote, sure enough it wasn't there. I have my opinion to voice but obviously im pretty heated and it's not going to be for a while.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
If you have the $400 get the ATS housing. Many folks say the WW will cure 99% of the surge so I went this route for less than $100 and the ATS housings was back ordered at the time. Has worked well for me and have'nt had any problems towing my 9,500 lb 5th wheeler.
The van turbo can have a bit of lag at the low end so I figured the WW would help out since it's supposed to push more air at the low RPM's. Not sure if my reasoning is correct but I like how she runs and I can haul a$$ down the interstate with Tony's tow burns & the 5th wheeler.
Keep the Rubber Side Down!!!!!!!!!!!!!!!!!!!
Full throttle untill you see God - then brake
Its not speed that kills - it's the sudden stops
(my favorite) Dip me in honey & throw me to the lesbians!
The van turbo can have a bit of lag at the low end so I figured the WW would help out since it's supposed to push more air at the low RPM's. Not sure if my reasoning is correct but I like how she runs and I can haul a$$ down the interstate with Tony's tow burns & the 5th wheeler.
Keep the Rubber Side Down!!!!!!!!!!!!!!!!!!!
Full throttle untill you see God - then brake
Its not speed that kills - it's the sudden stops
(my favorite) Dip me in honey & throw me to the lesbians!
Last edited by white Buffalo; Nov 2, 2006 at 09:13 PM.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Kris, that sucks but we've all had it happen. When I get a lengthy one going and have spent quality time, I always hilight and copy before submitting. Been there done that. Easy recovery.
Now all this talk about a WW performing better down low does not seem to jive with what I recall. I thought low end was lost with it and those half teeth grabbing away. And how could it spool up any quicker when the drive pressure from the exhaust turbine is controlling that? I thought all of the benefits of the WW were the lack of boost capability producing less surge and flutter when getting it on going down the road? Thoughts?
Edit: Kris, I've not been able to find the 404 error code in the manual. I recommend checking the CPS or Computer Position Sensor. A common malady on the 7.3 Diesel forum. Symptoms include loss of data, slow to load, and access denied or server not available messages.
Now all this talk about a WW performing better down low does not seem to jive with what I recall. I thought low end was lost with it and those half teeth grabbing away. And how could it spool up any quicker when the drive pressure from the exhaust turbine is controlling that? I thought all of the benefits of the WW were the lack of boost capability producing less surge and flutter when getting it on going down the road? Thoughts?
Edit: Kris, I've not been able to find the 404 error code in the manual. I recommend checking the CPS or Computer Position Sensor. A common malady on the 7.3 Diesel forum. Symptoms include loss of data, slow to load, and access denied or server not available messages.
Last edited by Tenn01PSD350; Nov 2, 2006 at 09:21 PM.
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Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Originally Posted by Tenn01PSD350
Kris, that sucks but we've all had it happen. When I get a lengthy one going and have spent quality time, I always hilight and copy before submitting. Been there done that. Easy recovery.
Now all this talk about a WW performing better down low does not seem to jive with what I recall. I thought low end was lost with it and those half teeth grabbing away. And how could it spool up any quicker when the drive pressure from the exhaust turbine is controlling that? I thought all of the benefits of the WW were the lack of boost capability producing less surge and flutter when getting it on going down the road? Thoughts?
Now all this talk about a WW performing better down low does not seem to jive with what I recall. I thought low end was lost with it and those half teeth grabbing away. And how could it spool up any quicker when the drive pressure from the exhaust turbine is controlling that? I thought all of the benefits of the WW were the lack of boost capability producing less surge and flutter when getting it on going down the road? Thoughts?
What we should probably do is get a few (maybee 3 or 4) cases of beer a chalkboard and a bunch of cigars, by the end of the night we can get it all figured out.
Might not remember in the morning though.....
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
Originally Posted by Tenn01PSD350
Edit: Kris, I've not been able to find the 404 error code in the manual. I recommend checking the CPS or Computer Position Sensor. A common malady on the 7.3 Diesel forum. Symptoms include loss of data, slow to load, and access denied or server not available messages.
youre on fire tonight, that was great! i was thinking WTF is he talking about, error 404+CPS=? Then i looked and ha i got it. Youre too funny. Maybe i should get a Blue Computer Position Sensor.
Or how about just a new one.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Kris, dare I say, I hear they sell them on Ebay for about $60?
Edit: I think JT hit it earlier with his fan analogy but I am very interested in your thoughts so please post them.
Edit: I think JT hit it earlier with his fan analogy but I am very interested in your thoughts so please post them.
Last edited by Tenn01PSD350; Nov 2, 2006 at 09:30 PM.
Lead Driver
Joined: Dec 2003
Posts: 5,250
Likes: 42
Originally Posted by strokin_it7.3
I just spent a half hour thinking and typing my viewpoint. I went to enter it, and the error 404 message came up. I went to hit back to retrieve what i wrote, sure enough it wasn't there. I have my opinion to voice but obviously im pretty heated and it's not going to be for a while.
With that said, I really would like to hear this heated opinion you have as my wife is thinking this WW thing is an affordable xmas gift I will really like (she overheard me talking about it with my pops).
Last edited by empiretc; Nov 2, 2006 at 09:34 PM.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Originally Posted by Tenn01PSD350
You got it Rich. Who wants to remember anyway. It's a new day.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by white Buffalo
If it's at Guntersville Lake I guess we'll also need fishin equipment & a boat. Oh, and we better invite Bama-sixguns. Kris - you gonna drive down & get out of the snow?