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  #1  
Old 02-11-2016, 02:23 PM
300SD81's Avatar
1981 Mercedes-Benz 300SD
 
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Location: University of Georgia
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300SD turbos on M117?

I'm thinking too small, but I'll toss it out there for the experts. Just kind of window shopping turbos right now and realized that I have 2 or 3 of these laying around.

Twin H1Es or HX40s is around what I'm actually looking at, since it seems others have had success with those turbos.
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1991 Mercedes-Benz 560SEL | Megasquirt MS3-Pro | 722.6 transmission w/ AMG paddles | Feind Motorsports Sway Bar | Stinger VIP Radar | AntiLaser Priority | PLX Wideband O2 | 150A Alternator | Cat Delete
1981 Mercedes-Benz 300SD | Blown engine, rebuilding someday...
1981 Mercedes-Benz 300SD | Rear ended, retired in garage.
2009 Yamaha AR230HO | Das Boot

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  #2  
Old 02-11-2016, 07:33 PM
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Why not a big single?
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  #3  
Old 02-11-2016, 08:56 PM
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Really depends on how much HP you aim to make and at what RPM.
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90 300TE 4-M

Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs, 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197 intake cam w/20 advancer
4 ignition advance
PCS TCM2000 running 722.6 trans, 600W PWM fan, water injection
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff
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  #4  
Old 02-11-2016, 10:24 PM
300SD81's Avatar
1981 Mercedes-Benz 300SD
 
Join Date: Aug 2006
Location: University of Georgia
Posts: 1,080
Twins just seemed like the go-to on a V8. Single is certainly an option as well, I'm just window shopping at this point.

As for HP goals..whatever the motor will take. I've seen references to 700HP at the wheels which would certainly be nice.

Found a side-by-side of an HX40 with the 617 turbo, definitely too small. It's really hard to judge the size of these things from pictures :/ On a side note, the diesel guys have made serious progress since I got the 560, makes me really want to rebuild the 300SD's motor.
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Ich liebe meine Autos!

1991 Mercedes-Benz 560SEL | Megasquirt MS3-Pro | 722.6 transmission w/ AMG paddles | Feind Motorsports Sway Bar | Stinger VIP Radar | AntiLaser Priority | PLX Wideband O2 | 150A Alternator | Cat Delete
1981 Mercedes-Benz 300SD | Blown engine, rebuilding someday...
1981 Mercedes-Benz 300SD | Rear ended, retired in garage.
2009 Yamaha AR230HO | Das Boot

Excessive speeding? It ain't excessive till I redline!
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  #5  
Old 02-11-2016, 11:05 PM
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Join Date: Oct 2004
Posts: 3,225
If I plugged the numbers into the calculator right you'd need around 1000 CFM to hit that target. Probably easier to get that out of two turbos if you want a reasonable spool. Time to start studying compressor maps.

Here's a handy site, too:

Not2Fast: Turbo Calculator
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90 300TE 4-M

Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs, 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197 intake cam w/20 advancer
4 ignition advance
PCS TCM2000 running 722.6 trans, 600W PWM fan, water injection
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff
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  #6  
Old 02-12-2016, 02:28 AM
300SD81's Avatar
1981 Mercedes-Benz 300SD
 
Join Date: Aug 2006
Location: University of Georgia
Posts: 1,080
That site is great. Looks like the H1E (from the only turboed M117 I can find with details) might be a little too big, while a HX35 or GT30 would be right in the middle. Genuine HX35s seem to be available for reasonable prices too. I might just take the plunge in the coming weeks...
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Ich liebe meine Autos!

1991 Mercedes-Benz 560SEL | Megasquirt MS3-Pro | 722.6 transmission w/ AMG paddles | Feind Motorsports Sway Bar | Stinger VIP Radar | AntiLaser Priority | PLX Wideband O2 | 150A Alternator | Cat Delete
1981 Mercedes-Benz 300SD | Blown engine, rebuilding someday...
1981 Mercedes-Benz 300SD | Rear ended, retired in garage.
2009 Yamaha AR230HO | Das Boot

Excessive speeding? It ain't excessive till I redline!
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