A coupe of REALLY interesting EBAY items - PeachParts Mercedes-Benz Forum

Litton · #1 02-25-2004, 04:27 PM

This one for for what appears to be a real nice 280SEL, but what grabbed my attention was the changed rear gear ratio to 4.09....I bet it really jumps. At the expense of some cruising fuel economy I bet.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=6336&item=2462771916

The Next item is for headers for the 117 engine. I notice that it has an O2 port so they must have been for something other then a 108 chassis.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33631&item=2462656714

Perfect for Tomguy in his persuit of more get up and go.

jas2wa · #2 02-25-2004, 04:38 PM

Hmm, that 4.5 must top out at about 90mph with the 4.09 rear end! Well, that might be exagerating the point slightly...

You could really burn up a set of tires with that, but it must be a drag on the highway. Mine hums as it is at 80 with the stock rear end (I thought they were 3.23's)?

-JAS

JoeyTheB · #3 02-25-2004, 05:05 PM

I'd LOVE to see pics of those installed...

You'll still need some custom plumbing done -
on the pass side you have two down pipes that converge under the floorboards.

If I didn't have a timevalve stainless and just R&R'd my manifolds, I'd be all over the headers.

Tomguy · #4 02-25-2004, 05:18 PM

I don't think that either side would work well in the 108'109 with the stock pipes. The pass has 2 pipes, yes, but the driver's side manifold has the exit between 2nd and 3rd pipes, this is much closer to the end - you'd need a custom exhaust.

Litton: When I (someday) get the cash, I'm going to have my own pipes designed, and try to find a way to have dual dual exhausts (like a lot of newer cars have - 2 pipes on the left, 2 on the right) with the crossover somewhere close to the engine.

#5 02-25-2004, 07:10 PM

my 4.09!

Seriously, though, what model would the 4.09 ratio have come from? Something with a 4 cyl. or a very small 6? Perhaps a taxi option in Europe? Not likely, in any case, to have enough guts to take the torque of a 4.5 for very long.

j9fd3s · #6 02-26-2004, 02:15 PM

the 02 port could be for a wideband

like this one http://www.innovatemotorsports.com/

tosbt · #7 02-26-2004, 03:41 PM

Those headers look real intresting. Anyone guess when type of performance increase one might expect with these?

Litton · #8 02-26-2004, 04:45 PM

I could be wrong, but looking at the exhaust on a 108 4.5, I just don't think that it it's that ineffienant. The pipes look like there are pretty much equal length, they are reasonably free of kinks. In fact each side is a 2 into 1 then to a collector. I think MB did a pretty good job putting this engine togeather and would be surprised if they even matched the ports.

Honestly, in a 108 I think the actaul HP gain would be minimal. Now if you are talking a 74 and later 450 SL, I bet it would be a differant story with the smog et al.

Tomguy · #9 02-26-2004, 07:27 PM

One thing I don't get about the 117/108 combo is that the right (pass) side has 2 downpipes and a union around the transmission, where the driver's has a single manifold and only 1 pipe. This is the crossover thing all over again, just in a different way - the right side has a crossover much later, the left side has to crossover in the manifold itself! Unsure about the effect this has on performance...

I don't think those would even fit into a 108/109... the pipes on them would probably be out too far and would be on the chassis!