Cosworth RX-7 [pics]

[dbizzle]

Mayhem.

[rysz]

That is awesome! I remember back in the CCC days, that there was one featured with S2000 underpinnings as well!

These cars are a great bed for other engine conversions. I keep thinking that more needs to be done with all of the b0rked RX8's there are about! The SR20 engined one that was advertised recently was a great example!

Rysz.

[Robinxr4i]

Never seen an FC with a YB in it before, as much as I love a good rotary, I'm loving that swap.

However I do remember this FD having a Cosworth YB in it ;D

[smithy13]

Bet the rotary is more reliable than the YB though.

[AB car pix]

Nice, liking this!
Now I really want to see a rotary Sierra though ;D

Nov 28, 2012 17:39:52 GMT smithy13 said:

Bet the rotary is more reliable than the YB though.

A good YB will take a hell of a lot of abuse

[309jazzpanda]

As long as its not 2wd block they're pretty good, but you need to spend serious money to get power and reliability

[popuptoaster]

Got mates running 400bhp YBs in old Escorts that get ragged silly day after day and survive, long as they are built right they are fine, not cheap though and the temptation is always there to go for more power.

[AB car pix]

Nov 28, 2012 19:41:04 GMT 309jazzpanda said:

As long as its not 2wd block they're pretty good, but you need to spend serious money to get power and reliability

Not true. The 205 block is strong and can take a lot of abuse.
Mine being one (as demonstrated in my sig!). Using all its 357 BHP to the limit. ;D

Known plenty in the low 400s to run a 205 block with no problems either.
Yes, huge power builds generally do have a 200 block with long studding etc, but don't knock a good budget YB.

[spekkie]

lovely !

[deejay]

OMG! I RREEEEEAALLY didn't need to see this...

Got my eye on one with no engine, this has given me BAAAD ideas especially at this time of year!

[sparkyt]

The 205 block the same as a pinto transit 205. ?

[Robinxr4i]

Dec 2, 2012 20:34:53 GMT sparkyt said:

The 205 block the same as a pinto transit 205. ?

From what I've read Cosworth took the Pinto 205 blocks from the production line that had the closest tolerances. These blocks were then used as the bases for the YB's.

[deejay]

All the late Pintos were 205s, Cosworth were VERY choosy over which ones they used.

[sparkyt]

I've got a few 205 pinto blocks / complete engine could I use cosworth. Low comp pistols and run a turbo . Is it that simple .. ?

[Robinxr4i]

Dec 2, 2012 22:26:12 GMT sparkyt said:

I've got a few 205 pinto blocks / complete engine could I use cosworth. Low comp pistols and run a turbo . Is it that simple .. ?

From the research I did some time ago, you can use Cosworth YB pistons in a Pinto to give you low compression forged pistons. Although I can't remember if you have to use the Pinto rods, I seem to remember something about the crank journals being a different size. Plus standard YB pistons don't sell for much seen several sets on eBay go for between £50-100.

Check out Skolgen Racing there was a guy running a silver saff with a pinto in it. The spec of the engine was YB pistons, ported head standard cam, Holset HX30 and Haltec management (iirc) he was making over 300bhp. Building a fairly big power pinto appears to be relatively cheap and easy.

[Robinxr4i]

I was a little wrong, but check out the video ;D

2liters Pinto 8valve engine, Holset H1e turbo, Haltech F9a, 680cc injectors Ported Head, standard camshaft, cosworth pistons and rods, 22psi of boost all metalworks done by myself.