This is going to be my thread in which I will update as my engine gets put back together. To start off I just received my custom fordged pistons from CP today and they will be going to the shop so the block and crank can all be machined and cleaned up nicely so it all fits together.
4 x fordged pistons 0.5mm oversize
8 x custom rings
4 x pins
They are 200g lighter than the standard piston.
Last edited by spm 16v benz : 01-18-2007 at 06:18 AM.
Vehicle: 1986 190E 2.3-16, 1992 190E 2.3 and 2007 GL450
Location: new york city
Posts: 868
Changing a Mercedes piston from the original design will change engine vibration and alter component tolerances. This means that the vibration modeling as assumed by Mercedes using the correct alloy pistons and block will be completely changed. Coriolis and gyroscopic relationships change from being partially neglected to adversely impacting harmonic balance. In a four cylinder motor, the effects could be enormous.
Realize that the massive, powerful feel of a Mercedes motor is not the product of trial and error. There are precise mathematical relationships at play to make that motor feel, sound and pull the way it does. There is a heavy, gyrating feel to the spin of a Mercedes motor whether it is a four cylinder or a twelve cylinder.
Dropping the weight of the pistons will eliminate those qualities and change the dynamics of the motor. This will alter its performance and life span. Precise vibrational analysis goes down the tubes and the new "shake" will take over and possibly ruin your motor.
Fordged pistons have been sometimes to be noted as nosiey when cold but thats about it. Balance is related to flywheel and the harmonic balancer. Piston and conrods are weighed and balanced separately as same weight units. As for your ruin your engine idea, it will not ruin my engine as a whole but it will only wear pistons over time just like any normal engine.
Vehicle: 1986 190E 2.3-16, 1992 190E 2.3 and 2007 GL450
Location: new york city
Posts: 868
Quote:
Originally Posted by spm 16v benz
Fordged pistons have been sometimes to be noted as nosiey when cold but thats about it. Balance is related to flywheel and the harmonic balancer. Piston and conrods are weighed and balanced separately as same weight units. As for your ruin your engine idea, it will not ruin my engine as a whole but it will only wear pistons over time just like any normal engine.
But it's your car. You can modify it any way you want.
Went to my fathers workshop today to take some pics. And today I finally received back my pistons, block and the crank from the shop and as soon as I can get some time my dad and I will start to put her back together. This engine is going to be so rev happy. But now for the pictures. More pics will come when she is being put back together.
Nice pictures, i know PARLAY and myself have been through this process as well. The builds will be similar. I tihnk our connecting rods are a bit larger though. That and the added turbo we are throwing on.
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