robinsoncrusoe55
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| posted on 6/6/25 at 09:53 AM |
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Cross flow Engine
1 for the crossflow engine experts ........
Can a 1600 cc head be fitted to a 1300cc engine. ?
Many thanks
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rusty nuts
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| posted on 6/6/25 at 10:47 AM |
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Yes if you have the type of head that is flat , not sure if you have the chamber type heads
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gremlin1234
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| posted on 6/6/25 at 11:55 AM |
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if I remember correctly, changing heads between engine sizes would allow you to mix and match compression ratios, but that may have been triumph
engines rather than ford.
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gremlin1234
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| posted on 6/6/25 at 01:51 PM |
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quote:
Originally posted by gremlin1234
if I remember correctly, changing heads between engine sizes would allow you to mix and match compression ratios, but that may have been triumph
engines rather than ford.
or maybe bmc engines A series
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robinsoncrusoe55
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| posted on 6/6/25 at 02:47 PM |
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Hi rusty nuts , yes both are flat heads with combustion chamber in the head of the piston , so sounds like it's doable.
Gremlins 1234 - I think in my case , I would have to change the pistons to alter the compression ratio .
.....was just considering a head swap , because the inlet valves are slightly bigger , so head would flow better .
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trialsman
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| posted on 8/6/25 at 03:06 PM |
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I did on my engine swap. Worked great. Just make sure you swap flat squish area for flat squish area. Russ
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robinsoncrusoe55
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| posted on 8/6/25 at 10:41 PM |
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Hi trialsman .... (Russ)
Yes , my fitted engine is the 1300cc from a mk2 Ford escort with the flat head and bowl in pistons .
Replacement head is similar design from a 1600 cc with the larger inlet valves , not sure about the exhaust valve size.
Believe that some of the earlier heads had a semi chambered design , but have not seen this type .
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trialsman
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| posted on 9/6/25 at 12:11 AM |
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MAKE SURE THE VALVE SEATS ARE HARDENED FOR UNLEADED GAS. RUSS
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joneh
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| posted on 9/6/25 at 06:33 AM |
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The 1300 and 1600 heads are the same. It was only the GT that had larger valves.
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robinsoncrusoe55
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| posted on 9/6/25 at 07:34 AM |
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Current head hasn't got hardened seats, but using super unleaded and an additive , probably not ideal ,
but compression is still reasonable.
Hi joneh , the 1600 cc head must be from a gt , as the inlet valve head diameter is definitely larger ....
but didn't know that the non gt head valve sizes are the same. Thanks .
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