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I know that most Ford x-flows are 711M blocks and there were earlier blocks with the code something like 681L but what is this? Do I have a Mark 1 XR2 block?  I also have a cylinder head but it's not flat like all x-flows - it's got combustion chambers in the head. XR2 as well? Cheers. |
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Last Edit: Feb 8, 2006 22:42:03 GMT by ScotsDave
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Identify this engine pleaseslater
@slater
Club Retro Rides Member 78
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humm, i cant remember the number on xr2's but i don't think its like that. An easy way to tell if its an xr2 is it wont have the same engine mounts as a escort/cortina engine.
The head could either be a early x-flow (cortina/transit etc.) which had a small chamber in the head or a head thats been specialy modified to run with flat topped pistons. Probably just an early head tho, theres loads about but deffo not xr2.
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Later crossflows are 711M-6015, earlier ones are 2737E-6015 or 618. Your one has thicker bore castings which are siamesed and you can bore it out to 1925cc alledgedly. The later 711M blocks are stiffer as the crankcase and blobk is stronger but can't bore as big because the bores are thin and go porous. If you want to build the ultimate x-flow then this is the one to go for, but it won't last as long as a 711M because it will twist when under big load. Not that it'll be a big deal, it will still go on for 50K miles. This one is out a 1600E Cortina or a very early Mk1 Escort
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Edit: check for an 'L' cast in between the bolt holes on the right hand side engine mount point, if it's got one of those you can bore straight out to 85mm (if you can find pistons) which will give you 1760cc. It doesn't mean it's a Lotus block, but it was the same as the ones used in the Lotus Cortina. They were essentially the same block to Ford so many ended up in 1500cc Mk1s when engines were exchanged. I *think* the head is chambered so to just increase the compression you can get the head face machined. Check here: www.lotus-cortina.com/library/block/blocks.htm there's a bit more about it. Apparently it's the main caps that are the weak point on that one, but they are easily replaced. I've got big honking steel ones on mine. |
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Last Edit: Feb 9, 2006 9:03:32 GMT by Deleted
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ahh so a pre x-flow block then! that makes sense  All Escorts ans 1600E's used cross-flow blocks. Does this mean I have something in my shed that's actually worth something  |
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ahh so a pre x-flow block then! that makes sense No it's a very early crossflow. Early 1600's were practically the same block as the 1500 pre-crossflow it replaced with a small chamber in the head. Compression was low as a result but the bore casting is thicker so you can bore it bigger than later 1600's. Does this mean I have something in my shed that's actually worth something Probably not, most crossflowers want the 711M blocks which I've never quite worked out because in all honesty it's not going to break any quicker once it's suped up  . Check for the L between the mounting holes on the right hand side. Probably get £100 for it, more if it's an L block. |
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Feb 10, 2006 16:24:31 GMT
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It's a bit late for Christmas but there's "no L"   Jonny - any idea which sites/clubs I could tout it round? I've only got the block, rods and +.030" oversize pistons as well as a chambered head with valves - don't know if they're standard or not though. |
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Last Edit: Feb 10, 2006 16:26:37 GMT by ScotsDave
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. Check for the L between the mounting holes on the right hand side. Probably get £100 for it, more if it's an L block.
