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Discussion Starter #1
Hello everybody !


I'm actually in some kind of a project where i will compress the N/A 3.2 M112 of my Crossfire (which is nothing but a SLK R170 320).
I need to make up a laser-cut on some metalic part to space the engine-head from the engine itself.
This is for lowering the compression ratio of the engine and in order to allow more boost to come from the intake.
By doing this, i will not break the engine, nor connecting rods, nor nothing at all ... except, perhaps the transmission/rear differential :)
But that is another story.


For now, i need to build up a scheme in order to give this scheme to the laser-cutting Professional i will be working on.
So my question is simple : do you know some kind of scheme like this /OR/ do you know any personnal that works @ mercedes and could give me this kind of document ?


Thanks !
 

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It sounds like to me that you are looking for a template for the head gasket. If you're looking at reducing the thickness of the gasket material to boost compression you may want to consider decking the heads. According to the crossfire manual I was using while doing my head gasket replacement it mentioned you could only reduce the deck clearance by .006" inch.

If I understand your post correctly and you're wanting to boost the compression of the engine you may want to consider higher compression pistons.
Randy
 

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It sounds like to me that you are looking for a template for the head gasket. If you're looking at reducing the thickness of the gasket material to boost compression you may want to consider decking the heads. According to the crossfire manual I was using while doing my head gasket replacement it mentioned you could only reduce the deck clearance by .006" inch.

If I understand your post correctly and you're wanting to boost the compression of the engine you may want to consider higher compression pistons.
Randy
I read it as he/she wants to do the opposite - reduce the compression ratio by adding a thicker gasket and adding a supercharger. But I might be wrong...
 

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Discussion Starter #5
I read it as he/she wants to do the opposite - reduce the compression ratio by adding a thicker gasket and adding a supercharger. But I might be wrong...
Yes, you got it.
Of course, as i'm planing to turbo this engine, i will have to lower the compression ratio which is actually 10:1, and doesn't seems to allow 1bar of additionnal boost into the intake.
I have to lower it to at best 8,5:1 or 8:1 to have a better error tolerance while TURBOing this engine.

If someone knows where can i find a template of the head gaskets, i would be very grateful to him !


Thanks !
 

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Hello everybody !

For now, i need to build up a scheme in order to give this scheme to the laser-cutting Professional i will be working on.
So my question is simple : do you know some kind of scheme like this /OR/ do you know any personnal that works @ mercedes and could give me this kind of document ?


Thanks !
New head gaskets are cheap enough - why not just buy a pair and use those as templates?
 

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Discussion Starter #7
New head gaskets are cheap enough - why not just buy a pair and use those as templates?
In fact, i need to produce the autocad model for the laser cuting device to do the work optimaly.
Using brand new head gaskets could do the trick, but i don't think the mesures could be precise enough for me to be satisfied by the work done.

This is why i'm willing to get the real template in order to have a great work done.
Laser cuting technologies are very precise and if i can optimize the whole work, it is just better for me.


Are there any MB techs here on this forum and which could help me with such a thing ?


Thanks !
 
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