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  #1  
Old 04-08-2008, 07:56 PM
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107 Stroker Engine 500Euro to 5.6 Euro

I'm posting pics of my co-workers SL. It is an 81 380SL that up until recently had a 500 Euro motor in it. As a couple of MB techs we've done a lot of bench racing over the years and he finally decided to have some real fun. It started with a 560 Sec that had a cracked block that came in the shop. The SEC got a shortblock, no big deal, and no core. So I convincve Mike to pull the crank, rods and pistons from the 560 before scrapping the block. Due to excessive oil consumption mike pulled his heads off his 500 Euro about the same time. It appeared that a couple of cylinders were passing oil past the rings and not the guides so out came the engine with the hope that the 560 reciprocating parts would interchange into his 500 block. Well this wouldn't be much of a post if it didn't. The long stroke crank fits right in using the 560 rods and pistons, giving the same deck height as the other block. He kept the smaller valve 500 heads intending to make a torque monster and not so much a 6k+ RPM screamer. Mike's not a tech geek so there are no pictures of the build. Sorry guys. He drove it into work today for the first time and I got to take it around the block. I can sum it up in 3 words.... gobs of torque. It's available right off idle too. If that wasn't enough for a big grin, at around 3k rpm, it gets a really mean snarl and pulls like mad to the upshift, after which I didn't have enough road ahead to hold it. Now the only thing planned is an exhaust upgrade. The big inch stroker really wants to breathe. Needless to say it's still faster than any 107s we work on in the shop by a good margin even with the restrictive pipes on it.
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107 Stroker Engine  500Euro to 5.6 Euro-mikey-001.jpg   107 Stroker Engine  500Euro to 5.6 Euro-mikey-002.jpg  
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  #2  
Old 04-08-2008, 08:34 PM
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1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
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past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
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Old 04-08-2008, 10:35 PM
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Nice!
Q: If the stroke has increased but the deck height and piston crown remains the same, doesn't that mean the compression ratio will have increased?
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Old 04-09-2008, 01:15 AM
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Sounds like a blast. WHat are those 3 bird turd looking things near the front fenders?
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Old 04-09-2008, 06:57 AM
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Quote:
Originally Posted by Ortolan View Post
Nice!
Q: If the stroke has increased but the deck height and piston crown remains the same, doesn't that mean the compression ratio will have increased?
Yes.

If all that you say is true.

Tom W
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Old 04-09-2008, 10:04 AM
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Yes the deck height is the same, although the 560 pistons have a larger dish so the compression is unknown in this combo. I'd guess it is more but how much I cant say. With the ignition pickup in the dist. he just set it up to run without pinging and it is really happy there
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Old 04-09-2008, 03:10 PM
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Tell him to please take off those disgusting fender gills.....aren't those from like a Mercury or something. Some of these fads boggle the mind. Other than that, sounds like a fun car!
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  #8  
Old 04-26-2008, 09:29 PM
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No fan shroud? Euro exhaust manifolds come buy from time to time- but they are chassis specific. I've sold some from both a 107 and a w126.
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  #9  
Old 04-27-2008, 12:13 AM
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Damn, thats one nice car....



I bet that thing flies.
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  #10  
Old 04-29-2008, 09:13 PM
88Black560SL
 
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Quote:
Originally Posted by duxthe1 View Post
I'm posting pics of my co-workers SL. It is an 81 380SL that up until recently had a 500 Euro motor in it. As a couple of MB techs we've done a lot of bench racing over the years and he finally decided to have some real fun. It started with a 560 Sec that had a cracked block that came in the shop. The SEC got a shortblock, no big deal, and no core. So I convincve Mike to pull the crank, rods and pistons from the 560 before scrapping the block. Due to excessive oil consumption mike pulled his heads off his 500 Euro about the same time. It appeared that a couple of cylinders were passing oil past the rings and not the guides so out came the engine with the hope that the 560 reciprocating parts would interchange into his 500 block. Well this wouldn't be much of a post if it didn't. The long stroke crank fits right in using the 560 rods and pistons, giving the same deck height as the other block. He kept the smaller valve 500 heads intending to make a torque monster and not so much a 6k+ RPM screamer. Mike's not a tech geek so there are no pictures of the build. Sorry guys. He drove it into work today for the first time and I got to take it around the block. I can sum it up in 3 words.... gobs of torque. It's available right off idle too. If that wasn't enough for a big grin, at around 3k rpm, it gets a really mean snarl and pulls like mad to the upshift, after which I didn't have enough road ahead to hold it. Now the only thing planned is an exhaust upgrade. The big inch stroker really wants to breathe. Needless to say it's still faster than any 107s we work on in the shop by a good margin even with the restrictive pipes on it.
Nice conversion. Does the 500 really have smaller valves. That would surpise me. I read the 500 Euro had around 240HP as compared to the 560SL version at 227HP. I had assumed the heads were the same.

Faster than any 107. I think it would be a close race but for a US spec 560SL verses Euro Spec 500SL my money would be on the US 560SL for 0-60 or in the 1/4 mile. For absolute top speed I would go with the Euro 500SL.

John Roncallo
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  #11  
Old 05-04-2008, 10:30 AM
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It is generally agreed around our shop that Mike's SL is faster than any we work on. Remember this is a Euro spec 500 engine with the 560's displacement, best of both worlds so to speak.
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  #12  
Old 05-04-2008, 07:00 PM
88Black560SL
 
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Quote:
Originally Posted by duxthe1 View Post
It is generally agreed around our shop that Mike's SL is faster than any we work on. Remember this is a Euro spec 500 engine with the 560's displacement, best of both worlds so to speak.
This is true. There was a Euro spec 560 SEL with 300 HP. Your friend should be running somewhere around 260HP.
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