Ford Powerstroke Diesel Forum

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-   99-03 7.3L Performance Parts (http://www.powerstroke.org/forum/99-03-7-3l-performance-parts/)
-   -   Turbo whisle??? 6.0 vs 7.3 (http://www.powerstroke.org/forum/99-03-7-3l-performance-parts/138049-turbo-whisle-6-0-vs-7-3-a.html)

RollinEarly99 03-15-2010 11:37 AM

There is a thread on this site were somebody put a 6.0 vgt turbo on a 7.3 obs. It sounds wicked

goats 03-15-2010 12:14 PM

the spool sound comes from the anti surge housing and not really by the wheel
heres what im talking about

the one on the left is a 4" ported anti surge houding and the on on the right is not and only a 3" inlet
http://i144.photobucket.com/albums/r...t/10211650.jpg

Tyler 03-15-2010 12:17 PM

Quote:

Originally Posted by AFBLUE (Post 1740554)
The 7.3 is what I would call a conventional turbo with a waste gate http://www.gpopshop.com/powerstroke.jpg


The 6.0 has a Variable Geometry Turbo, It doesnt have a wastegate, but it has a set of stationary fins on the exhaust side that that direct the flow of the exhaust gases either towards or away from the exhaust turbine, this is how it regulates the turbo speed and pressure. So with that being said the varible vanes create the whistle or a more pronounced turbo spool in the 6.0. How does Variable Turbine Geometry work?
http://www.bustedcar.com/PDR_0409.JPG

The 94-97 turbo does not have a wastegate either. The 99-03 7.3 Turbos do.

Rohan 03-15-2010 12:36 PM

Get a gtp38r and you'll get the sound you're wanting and more options for upgrades own the road too. I get pretty good whistle from my turbo, it's quite loud for a 7.3. But the sound is still different frm a 6.0, I wouldn't say quiter, just a different tone, if you will. I have WW and took the foil off the IC tube and that's it. Opening up the exhaust made a pretty big difference too.

Boostwizzard 04-30-2010 05:02 PM

I heard about the 6.0 turbos having problems, I'm the second owner of my truck and was fortunate to meet the original owner whom after chatting for a while told me that my turbo was replaced 2 time, both times it froze was with the truck being chipped. I've logged on about 60k miles since I owned it and its been flawless..... all I have is the SCT-> and 4" no cat exhaust and run it on street mode all the time. I have an unusualy louder turbo whistle than most other F series (unless heavily modified) that I have runned into and a lot of folks think Im running a big turbo when it actualy its stock. My concern now after reading further into these posts is the vanes sticking with soot and if there is anything that can be done to clean them while the unit is still on the truck? I heard that water injection keeps soot off the combustion chamber and EGR internals etc.
thanks.

CSIPSD 05-03-2010 03:35 PM

Quote:

Originally Posted by CloverLeafFarm (Post 1740508)
03 6.0 turbo is different than the 04's.......03 has i believe 14 vains in the turbo wheel, compared to the 04's 12.......i think


its 11 on the 2003 and 13 on the newer ones...

Quote:

Originally Posted by AFBLUE (Post 1740554)
The 7.3 is what I would call a conventional turbo with a waste gate http://www.gpopshop.com/powerstroke.jpg


The 6.0 has a Variable Geometry Turbo, It doesnt have a wastegate, but it has a set of stationary fins on the exhaust side that that direct the flow of the exhaust gases either towards or away from the exhaust turbine, this is how it regulates the turbo speed and pressure. So with that being said the varible vanes create the whistle or a more pronounced turbo spool in the 6.0. How does Variable Turbine Geometry work?
http://www.bustedcar.com/PDR_0409.JPG

There is nothing conventional about the 7.3 or the 6.0 turbos...

Both are Reverse rotation, where as a "conventional turbo" is Standard rotation.

The first turbo posts is a OBS turbo, which has a 1.10 AR compressor side and a 1.15 exhaust side. It has no wastegate.

The Superduty turbos (for the most part) have a 1.00 compressor and a .84 exhaust side. The smaller exhaust side makes for quicker spool, and the wastegate allows for higher RPM's without the exhaust back pressure getting out of control.

The 6.0's do not have a wastegate because the VGT can control the back pressure....

There is not one good reason to put a VGT turbo on a 7.3...

jmsmith76 05-03-2010 05:31 PM

can't remember whether i saw it on here or on another forum, but there is a guy runnin around with a 6.0 turbo on an OBS 7.3. it sounds bad as hell and spools almost instantly. he had to come up with his own controller for the variable vanes. if they aren't controlled correctly then the turbo can't create too much boost for the engine to handle. at least this is my understanding of it. lol

Brody133 05-03-2010 06:47 PM

Figured I would say this... the 03 turbo has 10 vanes which has the most whistle out of any 03-07 turbo. The 04 has 12 vanes which is not as loud as the 03, and the 05-07 has 14 or 15 vanes which is the quietest of the three.

Cark 05-03-2010 07:03 PM

With a 4" exhaust going into dual 6" stacks the turbo is pretty noticeable and loud on my 95. I drove a couple of 6.0's when I worked landscaping and know what you mean about them sounding louder... seems to me that the 7.3 simply gets a lot more power from the motor with a little help here and there as needed from the turbo, whereas the 6.0 gets just about all of it's power from the turbo. I know I can cruise around at or around 5 PSI in my 95 and it's moves just fine, seems like in the 6.0 cruising in similar situations I would be hovering alot closer to 10 PSI.

Just my 2 pennies

Tyler 05-03-2010 08:12 PM

With no turbo the 7.3 would be a slug. If I close the exhaust brake while driving, the turbo pretty much stops spinning, and it won't move hardly at all


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