Does anyone know if this is a genuine cosworth block ?
And anything about its possible history.

Markings on block are.
35 020
205
/ 85hm6915B-B

It has YBB5884 stamped on front of block, no engine number.

 

Yes, it's genuine.

 

Thanks for the info.
The ad hints that it might be an RS500 block, I think they were claimed to have smaller welsh plug holes and were a heavier , at least some were (the race ones), not sure if the block numbers are any confirmation one way or the other.

 

Do you have a picture of it?

 

here is one, I am thinking its a base 205 block based on the plug sizes...

 

Good afternoon my antipodean friend, I thought the two of you had died .

YBB = 205 block .

YBJ = RS500 block .

 

Legendary Mr R, Rep added

 

Hi Mike,

Yes we have been quiet on here for a while, Linc is very busy at work... I am busy too but recently I have been getting into the car again. I will have to post some pics for you, I have been just sending them to Linc direct to keep him interested ( he was in Germany recently)... We did some interesting comparisons on flow benchs of his head versus mine.

Next step is to get those long studs you supplied put in, finding a decent engineering shop is the challenge... as I want the bottom end done as well as you would expect.

Drop us a line on where you are up to

Gavan

 

I wonder if this was used by DJR the year before RS500 cam out. It looks like one of his, that water pump is pretty much what he had...
Unfortunately when I chatted to the guy the block has had all the cosworth crank and rods replaced with std pinto gear...
Thanks for the help guys

 

Send me the pictures etc as well .

Just enjoying using the car at the moment, so nothing happening mod wise at present (see my You Tube vids ).

 

Do you have a link to the you tube bits... ?

 

On my resto thread .
https://passionford.com/forum/restor...-added-19.html

There's some more in November (Mclaren MP4 humbling ).

 

YBJ = 4x4 Sierra 200-block
YBD = RS500 205-block