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| rhd280 Regular Date registered: Dec 2014 Location: New Zealand Vehicle(s): 1982 280GE LWB RHD Posts: 68  | Hybrid M110 distributor settings needed I need some advice on what to set the timing on hybrid M110. It's a M110-984 engine that became a long-block donor for my M110-994 G Wagon engine which failed. A Eurospec M110-984 is 26° at 3,500 RPM but that is a 9:1 engine. The US M110-984 spec would not apply because it has the G Wagon fuel injection and exhaust manifolds and none of the US pollution controls. The W460 spec would not apply because it is not the low compression 994. Essentially, it is a Eurospec with 8.5:1 compression and a US spec cam profile. Background: My 1982 W460 M110-994 G wagon developed a severe bottom end knock (read $8,000 and three months to book it in). I found and bought a 1981 280E LHD US Spec sedan that had been originally imported by the official MB importer into Japan. For the first 25 years it was driven about 2,500 km a year, and then when imported into NZ, it got lost in a dealer's storage warehouse and was never privately owned or driven. From 2012 to 2025 it was driven 3 km, but when the workshop started it in 2025 to get rid of it, it fired up. However, having sat for 12 years, the fuel injection system was a mess and the owner did not want to pour money into it, telling the workshop to dump it. I got lucky. It had been driven 65,000 km (40,000 miles) since new and the interior looked like it just came out of the factory. After I pulled the engine, I sold the rest to a restoration shop for next to nothing so the 280E looks like it will have a second life. It is a M110-984 K-Jetronic engine 123-033. It had all the US Spec controls... but all the peripherals were replaced with the G Wagon fuel injection, exhaust manifold, motor mounts, but not the cat, EGR, SAI, etc. Essentially, it became a long-block donor for the G wagon It appears to have the lower (compared to Eurospec) 8.5:1 compression ratio. Compression test while in the 280E: 1: 135 2: 130 3: 130 4: 130 5: 140 6: 135 That seems a bit low but we have not looked at the valves yet. We now are tuning the engine in the G wagon, but don't know what to set the timing. Any thoughts on a good setting? PS: While the idle is still lumpy, once it gets going, it is a whole lot stronger than the old M110-994 (G Wagon spec). | ||
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