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  #1  
Old 06-07-2009, 02:06 AM
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More power M117 4.5

Lets say I had money to spend. How would one go about turning the 180hp lug 4.5 into a 200-250HP or something comparable to the 6.9? Without putting a 6.9 in it. Using parts readily available to any one of us.

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  #2  
Old 06-07-2009, 02:11 AM
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My thoughts:

I see limitations in the modification of the intake due to the design of the manifold itself and the fuel system. Exhaust would be simple custom headers, heads probably could get a tighter valve train and cams (any aftermarket ones out there?) and the ports could be matched and polished. Will 6.9 fuel injectors work in a 4.5? Rotating assembly balanced and lightened.

My curiosity knows no bounds....
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  #3  
Old 06-07-2009, 06:15 AM
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FWIW, my std Euro 1979 350 SE pumped out 151kw which I think is @ 205HP
The OZ 450's pumped out 165kw (but a whole lot more torque) which is @ 220HP.
So, why not try source some Euro parts?
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  #4  
Old 06-07-2009, 04:46 PM
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Not really going to happen with CIS, sorry.

Swap in a US 5.6 for a big bump in TQ and nice HP jump. Run the ECE manifolds (standard duals or the TriY) and that's about all you'll get. I'm sure you could source some cams on ebay.de if you wanted for more top end, but you're still limited with the CIS.
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  #5  
Old 06-07-2009, 04:51 PM
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Quote:
Originally Posted by PanzerSD View Post
Lets say I had money to spend. How would one go about turning the 180hp lug 4.5 into a 200-250HP or something comparable to the 6.9? Without putting a 6.9 in it. Using parts readily available to any one of us.
180hp lug? Thats 50+ more than the diesels have.

Though....only about 10 more than a M103 I6.....kinda sad considering its 1.5 more liters!
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  #6  
Old 06-07-2009, 04:53 PM
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Quote:
Originally Posted by pawoSD View Post
180hp lug? Thats 50+ more than the diesels have.

Though....only about 10 more than a M103 I6.....kinda sad considering its 1.5 more liters!


Yeah but how much torque is the M103 making at 2000rpm versus even the small M117?
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'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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  #7  
Old 06-07-2009, 04:55 PM
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Originally Posted by Hit Man X View Post
Yeah but how much torque is the M103 making at 2000rpm versus even the small M117?
About 50lbs.

Its the only thing I don't like about the M103....the lack of low end torque. My 617 can peel pavement off the road from a standstill it has so much torque....but the M103 just kinda leisurely takes off until it rev's up.
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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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  #8  
Old 06-07-2009, 04:57 PM
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Quote:
Originally Posted by pawoSD View Post
About 50lbs.

Its the only thing I don't like about the M103....the lack of low end torque. My 617 can peel pavement off the road from a standstill it has so much torque....but the M103 just kinda leisurely takes off until it rev's up.


And the smogged out US 5.6 is about 100lb-ft MORE than the M103.

Well compound your beef of that motor into a vehicle that has more drag and weighs more... I just do not care for the 300sel.
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'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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  #9  
Old 06-07-2009, 05:36 PM
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When I think about it, after having been able to drive both the diesel and gas W116's I'd have to agree with pawoSD and say that my 617 had alot better throttle response than my 117. But then I did have some tinker time on the 617. ahh hell I'll just make it a diesel..
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  #10  
Old 06-08-2009, 01:01 AM
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When I think about it, after having been able to drive both the diesel and gas W116's I'd have to agree with pawoSD and say that my 617 had alot better throttle response than my 117. But then I did have some tinker time on the 617. ahh hell I'll just make it a diesel..
Yep, a well tuned 617 makes some serious car-shoving torque on takeoff, from 0-20mph it just feels so strong! I much prefer it to the more leisurely gasser.....not that the gasser is slow, if you kick it in first it will peel away reeeal fast....and use gas reeeeal fast too. But the diesel gives that powerful push every time, without using tons of fuel.

I'll always drive diesel.
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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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  #11  
Old 06-08-2009, 04:33 PM
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I would keep the hood ornament and attach a 500E to it!
Anziani
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  #12  
Old 06-08-2009, 04:48 PM
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you should search my thread in the vintage forum. It's easy to do and I outlined a cheap way!
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  #13  
Old 06-08-2009, 09:06 PM
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Swap to 5.6L block, go 100mm over bore (6L), P&P on heads/intake/ECE manifolds/various coatings etc.. Solid lifters on a HOT grind, spinning about 67-6800. With a properly tweaked fuel distro you can flow PLENTY of fuel to make this things Hum. Figure 325+Hp. More if you went EFI/Stand alone.


Jonathan
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  #14  
Old 06-08-2009, 10:56 PM
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Dieselsüchtiger
 
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Quote:
Originally Posted by jhodg5ck View Post
Swap to 5.6L block, go 100mm over bore (6L), P&P on heads/intake/ECE manifolds/various coatings etc.. Solid lifters on a HOT grind, spinning about 67-6800. With a properly tweaked fuel distro you can flow PLENTY of fuel to make this things Hum. Figure 325+Hp. More if you went EFI/Stand alone.


Jonathan
Sounds expensive....and thirsty!

I would think just swapping in a normal 500 or 560 engine would be quite a boost....
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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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  #15  
Old 06-08-2009, 11:07 PM
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Sure, a 5L euro or 5.6 US or Euro would give you quite the boost.

Won't be all That much worse then a standard car..it ALL depends on how hard/often you get on that pedal;-)

You mentioned you had $$ to spend, and aside from forced induction/custom intakes etc that's about as far as you can reasonably go..


Jonathan

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