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is this a cossie block ?

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Old 23-05-2012, 10:07 AM
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oohogwash1
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Default is this a cossie block ?

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.
Old 23-05-2012, 10:28 AM
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Jasu
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Originally Posted by oohogwash1
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.
Old 23-05-2012, 10:44 AM
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oohogwash1
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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.

Last edited by oohogwash1; 23-05-2012 at 10:45 AM.
Old 23-05-2012, 11:39 AM
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Do you have a picture of it?
Old 23-05-2012, 12:32 PM
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oohogwash1
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here is one, I am thinking its a base 205 block based on the plug sizes...
Old 23-05-2012, 02:24 PM
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Mike Rainbird
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Good afternoon my antipodean friend, I thought the two of you had died .

YBB = 205 block .

YBJ = RS500 block .

Last edited by Mike Rainbird; 23-05-2012 at 02:33 PM.
Old 23-05-2012, 02:59 PM
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Mk4 Lew
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Legendary Mr R, Rep added
Old 24-05-2012, 10:59 AM
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oohogwash1
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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
Old 24-05-2012, 11:02 AM
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oohogwash1
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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
Old 24-05-2012, 12:17 PM
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Mike Rainbird
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Originally Posted by oohogwash1
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
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 ).
Old 24-05-2012, 12:28 PM
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Do you have a link to the you tube bits... ?
Old 24-05-2012, 01:15 PM
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On my resto thread .
https://passionford.com/forum/restor...-added-19.html

There's some more in November (Mclaren MP4 humbling ).
Old 27-05-2012, 09:04 AM
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Originally Posted by Mike Rainbird
Good afternoon my antipodean friend, I thought the two of you had died .

YBB = 205 block .

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