190e 2.5-16

[Charleseawright]

I am reading on wiki that the cosworth cyl. head is basically dropped in on top of the existing mercedes w102 block. In this case, can you replace a damaged c mercedes 2.5-16 block with parts from the basic 190 block?

also. can you easily swap a more powerful uk head onto an american version of the 2.5(the one that was downgraded)

 

[John]

Can't help with your post but welcome to the forum.

I'm guessing you are from the US (we didn't have a E38 745!)?

 

[Charleseawright]

yes. southeast, sweet tea capital
i am VERY interested in this publicly available racecar

 

[Will]

In a nutshell:

- 2.3-16 bottom end is similar to an 8v M102 2.3, but not identical. For an obvious start the pistons are pocketed for the multivalve head (4x cutouts on each)
- 2.5-16 was never sold in the US. The cranks are different and they stroked the engine for the additional ~ 200cc
- US spec 16v cars aren't restricted solely by the cylinder heads. I believe that aside from a lower compression ratio, they were also restricted electronically (different fuel pump relay with a lower rev limit etc)

Might be of interest that the Evolution varients were bored out for the additional displacement rather than stroking the 2.3 engine. With this shorter stroke 2.5-16 engine they are more rev-happy and redline higher than a regular 2.5-16.

Mechanical work on these is easy if you know how, bodywork and interior condition are the biggest obstacles to a good example these days IMHO.

Will

 

[Charleseawright]

Mercedes-190.co.uk just found this

 

[Charleseawright]

and thank you!