GTP 38R compressor housing

[DieselF350Nick]

Can you get a ported compressor housing for a 38R? looking to get a different one then factory. If so who sells them?

 

[DieselF350Nick]

Bump

 

[Strictly Diesel]

38R HAS a ported housing already. What is it that you are trying to accomplish?

 

[DieselF350Nick]

Dieselsite used to offer a upgraded turbo housing for the 38r that got rid of the turbo surge from 15-25 psi

 

[Lowdown89]

I bought one of the ones from diesel site when it was on clearance, it looked exactly like my stock housing so I'm not sure how much it was machined... Can't really say if it helped with anyhting or not tho.

 

[DieselF350Nick]

i am also going to be running a ceramic coated 1.15 housing and batmowheel

 

[Lowdown89]

Have you already bought them? If not I will make you a smoking deal on the batmowheel and housing if you really wanna run them

 

[DieselF350Nick]

i have had them on the shelf for a while

 

[DieselF350Nick]

whats the deal tho?

 

[SouthFlstrokin']

Have you already bought them? If not I will make you a smoking deal on the batmowheel and housing if you really wanna run them

:doh:

 

[Lowdown89]

:doh:

That's why I said if he really wants to run that combo

 

[DieselF350Nick]

you didn't like the combo?

 

[TARM]

This might have something to do with his unfavorable outlook on the combo

Hey all. Sorry for the delay. I need to take some time yesterday to go through all the configurations and datalog every run to make sure that I am providing the most accurate information I possibly can. I appreciate everyone's patience while we took time to review and process this information and hope that everyone finds it to be useful. Now, on to the good stuff.

First, the question was asked about the part number for the exhaust housing. That number is 70213-0005 which is a true 38R 1.15 A/R housing. With that out of the way, let's move on to the testing.

In case it has been overlooked, the test vehicle used is as follows:

Ford F350 Super Duty CC DRW, A/T with 4.10 gears
Engine rebuilt in May of 2011 - .030 overbore, new Mahle pistons, forged rods, stock camshaft
Injectors - Full Force Diesel 250cc/200% Single Shot
Turbocharger - GPT38R w/1.00 A/R Wastegated Housing
HPOP - DieselSite Adrenaline
Fuel System - DieselSite CPR w/Walbro fuel pump, regulated at 70 PSI
Exhaust - 4" Downpipe back

All dyno runs are performed locked in 3rd gear with the torque converter locked to provide a 1:1 ratio through the transmission with no slippage or shifting concerns. Also, the engine speed is stabilized at 1400 RPM before starting each run so that spooling characteristics can be accurately compared.

All our original runs and datalogs were produced with the standard GTP38R turbo with the 1.0 A/R Wastegated Housing. Our best run (on 04/18) produced 566 HP and 1189 Ft./Lbs. TQ after correcting the fuel pump problem we had where pressure dropped to 25-28 PSI during the run. Even with the pressure dropping we were still in the 540's at around 1140 Ft./Lbs. TQ range. For a stock 38R I though this was rather impressive, especially when the truck starts and drives like a factory 7.3L truck, at least until you stuff the accelerator to the floor. Here are some notable points from this configuration:

Dyno Run - 04/17/2012 - GTP38R, 1.0 W/G housing, Stock compressor wheel
(All values rated at 3500 RPM)

• Max Boost - 34 PSI
• Max EBP - 47 PSI
• Max EGT - 1300
• Peak HP - 566 @ 2613 RPM
• Peak TQ - 1189 @ 2512 RPM

On 04/22 we performed a pre-run to establish a base to take into account current weather conditions. Ambient temp and humidity were relatively similar to the prior runs when we installed the Walbro fuel pump, and as expected the base runs were within 5 HP and 10 Ft./Lbs. TQ of the original runs on 04/18. We removed the turbo, changed the exhaust housing to the 1.15 A/R housing and installed the BatMoWheel (BMW). Several runs into the new configuration we immediately observed a sharp drop in performance. Boost was down, EGTs were up, and HP & TQ were down. Notable points from this configuration:

Dyno Run - 04/17/2012 - GTP38R, 1.15 Non-W/G housing, BMW compressor wheel
(All values rated at 3500 RPM)

• Max Boost - 31 PSI
• Max EBP - 44 PSI
• Max EGT - 1400
• Peak HP - 522 @ 2621 RPM
• Peak TQ - 1058 @ 2593 RPM
• Net HP Loss - 44 HP
• Net TQ Loss - 131 Ft./Lbs.

On 04/28 we performed an initial base run to verify that the current power output matched the last run we did the previous week. HP and TQ curves were comparable. We removed the turbo and re-installed the 1.0 W/G housing, leaving the BMW in place. Subsequent runs indicated that while there was a 3 PSI increase in exhaust backpressure, there was no appreciable increase in boost and power did not improve. In fact, the dyno runs from switching to the 1.0 housing were nearly identical to the 1.15 housing. Notable points from this configuration:

Dyno Run - 04/17/2012 - GTP38R, 1.00 W/G housing, BMW compressor wheel
(All values rated at 3500 RPM)

• Max Boost - 31 PSI
• Max EBP - 47 PSI
• Max EGT - 1400
• Peak HP - 525 @ 2689 RPM
• Peak TQ - 1055 @ 2575 RPM
• Net HP Loss - 41 HP
• Net TQ Loss - 134 Ft./Lbs.

After letting the engine cool down, we again removed the turbo, re-installed the factory 38R compressor wheel, re-installed the 1.15 non-W/G housing, and then performed a series of runs. There was an immediate improvement in lower RPM spooling along with an improvement in overall performance. Notable points from this configuration:

Dyno Run - 04/17/2012 - GTP38R, 1.15 Non-W/G housing, Stock compressor wheel
(All values rated at 3500 RPM)

• Max Boost - 34 PSI
• Max EBP - 45 PSI
• Max EGT - 1300
• Peak HP - 542 @ 2620 RPM
• Peak TQ - 1141 @ 2433 RPM
• Net HP Loss - 24 HP
• Net TQ Loss - 48 Ft./Lbs.

At this point, we've removed both the 1.15 A/R housing and BMW and reinstalled the original 38R components. Power is back up to 561 HP and 1178 Ft./Lbs. TQ and boost is still at 34 PSI. The 2-3 PSI drop in EBP from running the 1.15 housing does not justify the expense of the housing, especially since the stock 1.0 housing produced 20 more HP, 45 more Ft./Lbs., and spooled more quickly than the 1.15 housing.

This is the final comparison between the stock 38R compressor wheel and the BMW with both the 1.0 and 1.15 housing. Please note that the HP scale is on the RIGHT side of the graph and the TORQUE scale is on the left side.

(click on image to enlarge)

Our overall impression is that in this configuration neither the BMW nor the 1.15 housing performed as well as we had expected. The drop in drive pressure from the 1.15 housing, while causing a noticeable drop in peak performance, didn't have as significant of an adverse an effect on spooling characteristics and low RPM power. However, our testing and observations indicate that the BMW suffered significant losses in both peak performance and spooling characteristics, with extremely noticeable lag, higher EGTs, and more smoke throughout the RPM range.


Now for the disclaimer: I strongly urge everyone to please keep in mind that while the turbo modifications didn't offer any improvement in this configuration, it doesn't mean that there aren't applications where the modifications would offer some benefit. These are simply our observations made on a single vehicle with specific modifications and tested in a controlled, consistent environment. We offer this information as a general reference, and while we make every effort to provide accurate and unbiased data, we do not accept any responsibility for how the data we have provided is interpreted or misinterpreted. Other individuals may chose to perform their own tests and draw their own conclusions. If any manufacturers would like to receive copies of any of the dyno or datalog information we have produced from our test procedures, or if there are any questions about the test procedures themselves, we will be happy to provide that information upon request. If you are not a manufacturer, please do not request any further data outside of what has been posted in this thread.

I hope this information is helpful and informative.

Here is the link to that thread as well; that post was number 208 http://powerstrokearmy.com/forums/showpost.php?p=304928

 

[Lowdown89]

Thanks for posting that TARM I was going to make sure he saw that before he got his hopes up to much... I have no idea what kinda setup you are running and you might see a gain from the 1.15 housing I know a lot of people swear by it I mean that's why I bought it but as for the BMW and 1.15 housing together all I can say is that it didn't work for me and as far as I know I'm the only one who has dyno runs with the BMW on the 38r I don't know if that's because everyone else is ashamed of wasting the money and just don't post their results or what or maybe they put it on and their SOTP dyno feels like it's helping them

 

[SouthFlstrokin']

Jason your the man

 

[Lowdown89]

Jason your the man

Lmao coming from you I'm not sure if that's a jab or a compliment oke: haha LOL

 

[SouthFlstrokin']

why would it be a jab???? LOL

 

[Lowdown89]

why would it be a jab???? LOL

Well I don't run a ranch hand, but then again I don't have a newer style front end either....... so I never know where I stand with ya lmao

 

[SouthFlstrokin']

LOL you're alright bud LMAO

 

[DocBar]

I'm glad I read this thread. I just pulled my >12,000lb 5thwheel 738 miles to Georgia and had some surge issues. I was wondering what this set up would do.

Thanks for posting up the results.