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+--- Thread: W115 300D intake manifold upgrade (/showthread.php?tid=241)
W115 300D intake manifold upgrade - ForcedInduction - 02-10-2009
The W115 manifold is a great upgrade. It gets the inlet up higher, it adds runners for better torque and volumetric efficiency, it looks cool and its bolt-on.
I had been using a Cummins intake air heater but it did absolutely diddly squat as a starting aid in sub-zero temperatures. The stock mouth is a metric diameter so you'll have a tiny bit of trouble finding anything to clamp onto it securely. I ended up finding a 2.5" aluminum mouth and welded it to the manifold. I also modified my GT2256V compressor housing with a 2" aluminum tube at a vertical angle to simplify tubing requirements since I don't use an intercooler (anymore).
So far its working great. No leaks, no cracks, it looks much better, it spools a tad quicker and it runs 1psi lower on the highway @70mph. The only down side is the turbo will surge a tiny bit at 5psi under 1500rpm, above that it whistles really nice.
RE: W115 300D intake manifold upgrade - Actros617 - 02-12-2009
will there be any issues with a W126 using a W115 intake port, Because there is a couple of vacuum hose that goes into the manifold... Do i have to tap one for it or is there one already on the port but in a different location.
RE: W115 300D intake manifold upgrade - ForcedInduction - 02-12-2009
The W126 should handle it. I think I've seen one before.
Yes, you'll have to plug the crankcase vent and vacuum pump vent holes and tap a hole for the ALDA/boost gauge line.
RE: W115 300D intake manifold upgrade - kamel - 02-12-2009
Oooo sexy, kinda. You have any spares?
RE: W115 300D intake manifold upgrade - ForcedInduction - 02-12-2009
Just the one I replaced. Its staying here though, for a future car project.
RE: W115 300D intake manifold upgrade - Benzbeliever - 02-14-2009
I got a few questions on those pictures Forced. I haven't been following your progress lately so I'm a little behind.
Whats the big square box on the intake of the intake manifold that you removed?
Are you now bypassing the intercooler?
Where did you get that air filter? It looks like the Napa 6637 filter I have on my 7.3L ford.
Is that a oil separator sitting on top of the breather? Draining right back into the head? Where did you find that and how has it been working?
Whats the 3/8 line tapped into the turbo outlet for?
I think that's it, but your responses will likely prompt a whole new set of questions.
RE: W115 300D intake manifold upgrade - Benzbeliever - 02-14-2009
OK, checked out your car profile.
Intercoolers gone because you don't push it enough to need one and wanted to get rid of the turbo lag associated with it.
Fram 8038 air filter w/3" port. The Napa 6637 has a 4" port and is probly a little bigger(I've been thinking about putting one in the benz).
Still curious about the others.
And the baldwin fuel filter mod
RE: W115 300D intake manifold upgrade - ForcedInduction - 02-14-2009
(02-14-2009, 09:20 AM)Benzbeliever Whats the big square box on the intake of the intake manifold that you removed?That was an air intake heater from a 5.9L Cummins. It wasn't worth the space it occupied so I got rid of it.
Quote:Is that a oil separator sitting on top of the breather? Draining right back into the head? Where did you find that and how has it been working?Its from a early 90's VW. Its really more of a PCV valve since it limits crankcase vacuum but it also helps with oil separation a bit. Not very well, but better than nothing.
Quote:Whats the 3/8 line tapped into the turbo outlet for?The vane actuator. The bottom actuator works off manifold pressure like a normal wastegate and the top works off vacuum.
The air filter is used on all 96-02 Chevy/GMC Pickups.
RE: W115 300D intake manifold upgrade - ForcedInduction - 06-12-2010
I wonder where this guy got his pictures?
http://cgi.ebay.com/ebaymotors/Mercedes-Benz-300-Diesel-115-123-turbo-intake-manifold-/250649657845
RE: W115 300D intake manifold upgrade - Captain America - 06-14-2010
Haha that guy has a nice car. Don't be jealous of him forced!
RE: W115 300D intake manifold upgrade - Tymbrymi - 06-14-2010
(06-12-2010, 05:55 PM)ForcedInduction I wonder where this guy got his pictures?
That's annoying.... which is a huge understatement....
RE: W115 300D intake manifold upgrade - ForcedInduction - 06-14-2010
If he had asked I wouldn't mind one bit. Its the not asking that annoys me.
RE: W115 300D intake manifold upgrade - Captain America - 06-15-2010
So is the w115 manifold the best bolt on option? I was just think about how to attach silicone tubing to the stocker for an intercooler...
RE: W115 300D intake manifold upgrade - rdirtycar - 07-02-2010
just bought this manifold and paid too much. I know longer intake runners are better than the marine type manifolds present on the 80's diesels. I wonder if the throttle response would improve that much if you gave the cylinder head, the w115 intake manifold, and exhaust manifold to a skilled technician with a flow bench.
RE: W115 300D intake manifold upgrade - Rudolf_Diesel - 07-02-2010
(07-02-2010, 04:42 PM)rdirtycar just bought this manifold and paid too much. I know longer intake runners are better than the marine type manifolds present on the 80's diesels. I wonder if the throttle response would improve that much if you gave the cylinder head, the w115 intake manifold, and exhaust manifold to a skilled technician with a flow bench.
How much did you pay? I just saw one yesterday at Pick-A-Part, I didn't feel like taking it off; they go for $31.95 + fees. I did find a nifty trianlge in a euro car though!
RE: W115 300D intake manifold upgrade - Captain America - 07-02-2010
Rudolf! Which Pick-A-Part!?!?!??!?!?!?!?!??!??!?!?!?!?! Can I go Take it?
RE: W115 300D intake manifold upgrade - Rudolf_Diesel - 07-02-2010
(07-02-2010, 05:28 PM)Captain America Rudolf! Which Pick-A-Part!?!?!??!?!?!?!?!??!??!?!?!?!?! Can I go Take it?
As of yesterday it was at the one in Monrovia off of Peck Rd. The hardest part is removing the A/C compressor to get the exhaust bolt off.
RE: W115 300D intake manifold upgrade - DeliveryValve - 07-03-2010
(07-02-2010, 07:05 PM)Rudolf_Diesel ...The hardest part is removing the A/C compressor to get the exhaust bolt off.
Those damn big *ss York compressors!
.
RE: W115 300D intake manifold upgrade - Captain America - 07-04-2010
Hmmm... Well If your not claiming it then I'd like to go grab that bioootch!
Anyone want to share what it/tools takes to get it off other that what is required to for the 300d turbo?
RE: W115 300D intake manifold upgrade - rdirtycar - 07-04-2010
I paid WAY too much. It's embarassing. I can't tell. I got a perfect specimen though. That's all that really mattered to me. There aren't many w123s in the junk yards around here. There aren't many w123s in Connecticut. Rust is a real issue here.
RE: W115 300D intake manifold upgrade - Rudolf_Diesel - 07-04-2010
(07-04-2010, 08:41 AM)rdirtycar I paid WAY too much. It's embarassing. I can't tell. I got a perfect specimen though. That's all that really mattered to me. There aren't many w123s in the junk yards around here. There aren't many w123s in Connecticut. Rust is a real issue here.
Is it blue?
(07-04-2010, 03:36 AM)Captain America Hmmm... Well If your not claiming it then I'd like to go grab that bioootch!
Anyone want to share what it/tools takes to get it off other that what is required to for the 300d turbo?
First Come First Served, but you better hurry because they have a fast turn over. It is way in the back and a burgandy color, not sure what Mercedes calls that color.
As far as tools:
* 3/8" rathcet
* 3/8" x 12" and 6" extansions
* 3/8" universal
* 17mm socket & wrench
* 13mm socket & wrench
* 10mm socket & wrench
That's all I can think of, but you should take a small arangement of tools just incase.
Remove A/C bracket and move A/C compressor to the side. Remove exhaust and intake nuts, slide off manifold - it should take about 30 minutes tops.
RE: W115 300D intake manifold upgrade - rdirtycar - 07-04-2010
no paint
RE: W115 300D intake manifold upgrade - Captain America - 07-04-2010
Sweet Rudolf. Thanks Man! I'll just carry that stuff in my car anyway, I'm sure there are plenty of yards between Hawthorne in LA and Riverside. Hopefully I can grab one on the way home one day. My 300 is the same color I call it plum or maroooooooooooon haha
RE: W115 300D intake manifold upgrade - Rudolf_Diesel - 07-04-2010
(07-04-2010, 02:45 PM)rdirtycar no paint
I saw one advertised fro $175.00+ on ebay.
RE: W115 300D intake manifold upgrade - rdirtycar - 07-05-2010
I saw one for $90 but it needed to be lapped, there were dings on one of the mating surfaces. What's a typical aftermarket long runner intake manifold sell for? There is another type of intake manifold, I guess usually listed for less, that will fit, with the intake hole on the top, but they sit lower I believe.
RE: W115 300D intake manifold upgrade - Biohazard - 07-06-2010
(07-05-2010, 12:03 PM)rdirtycar I saw one for $90 but it needed to be lapped, there were dings on one of the mating surfaces. What's a typical aftermarket long runner intake manifold sell for? There is another type of intake manifold, I guess usually listed for less, that will fit, with the intake hole on the top, but they sit lower I believe.
If you're refering to the W123 chassis 300D non-turbo manifold with the long runners and more of a 'flat' profile (non curved runners), it won't clear the turbo assy. It has the intake hole coming straight up from the middle of the plenum. I've tried it with a stock K26 turbo and with my bigger T3T4 turbo as well. No clearance from the compressor housing to the plenum or runners. My brother has one hanging off the wall in the garage. Neat looking manifold, but not going to work with the turbo. For now, it's just garage art.
RE: W115 300D intake manifold upgrade - ForcedInduction - 07-10-2010
If anyone can confirm the A/C bracket will acceptably clear the turbo inlet I'd buy the bracket and compressor to make it worthwhile to get the manifold. Having a york there would make a kick-ass air compressor, much better than those annoying electric pumps on ebay.
RE: W115 300D intake manifold upgrade - bricktron - 05-28-2012
is this mod a non-starter on an 85 california engine because of the turbocharger location, or would it only take pointing that silicone elbow a different direction?
RE: W115 300D intake manifold upgrade - Captain America - 05-29-2012
(05-28-2012, 12:50 AM)bricktron is this mod a non-starter on an 85 california engine because of the turbocharger location, or would it only take pointing that silicone elbow a different direction?
I think the easiest thing to do would be swap both intake and exhaust manifolds.