SL/R107: W107 engine rebuild for E85 and 100 octane
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Super Member
Joined: Apr 2003
Posts: 792
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From: Las Vegas
2003 C230 K , 2001 ML320
W107 engine rebuild for E85 and 100 octane
I am planning on getting a 1973 W107, right now leaning to the SL, but if a clean body SLC with the right paint comes along.
Living in Las Vegas now I have access to both 100 octane gas and 105+ octane E85.
I am not good on car bodies, but have built many engines in my days.
Any ideas on getting high compression pistons for the iron block 450 or the 560 engines?
I plan on the normal hot rodding, such as ballancing, windage tray, rods shot peaned, and perhaps the piston crowns thermal barrier coated.
Will the 560 heads (with larger valves ) bolt on the iron blocks? Is there a better head gasket?
At ozbenz.net there is great info on all sorts of swaps between M117 and M116 in various years.
Although the most cubic inches can be had from the 560 block, there are so many disadvantages I think the good ole iron block will do. Looks like MB used smaller rod bearings to stroke the crank from 85 to 94.8mm for the 560
Anyone have an idea how big an overbore the iron block can take? I would love to think it could be bored out to 96.5, but I really doubt it. Of course it might be decided by piston ring availability.
I grew up on Ford 289s, the MB is much better designed. Four bolt mains, and the 560 crank will bolt right in so long as I use the 560 gears and chain. using a 560 crank and rods, and 94 mm pistons the dislpacement would be about 5.26 Liters. At 10:1 compression the horsepower would be over 300 with the stock heads, and using heads with the larger exhaust valve should be over 320 and perhaps as much as 340 HP. But the torque would be awesome.
Living in Las Vegas now I have access to both 100 octane gas and 105+ octane E85.
I am not good on car bodies, but have built many engines in my days.
Any ideas on getting high compression pistons for the iron block 450 or the 560 engines?
I plan on the normal hot rodding, such as ballancing, windage tray, rods shot peaned, and perhaps the piston crowns thermal barrier coated.
Will the 560 heads (with larger valves ) bolt on the iron blocks? Is there a better head gasket?
At ozbenz.net there is great info on all sorts of swaps between M117 and M116 in various years.
Although the most cubic inches can be had from the 560 block, there are so many disadvantages I think the good ole iron block will do. Looks like MB used smaller rod bearings to stroke the crank from 85 to 94.8mm for the 560
Anyone have an idea how big an overbore the iron block can take? I would love to think it could be bored out to 96.5, but I really doubt it. Of course it might be decided by piston ring availability.
I grew up on Ford 289s, the MB is much better designed. Four bolt mains, and the 560 crank will bolt right in so long as I use the 560 gears and chain. using a 560 crank and rods, and 94 mm pistons the dislpacement would be about 5.26 Liters. At 10:1 compression the horsepower would be over 300 with the stock heads, and using heads with the larger exhaust valve should be over 320 and perhaps as much as 340 HP. But the torque would be awesome.
