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Swap SOHC Head to DOHC Head on SOHC Motor?

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Old 03-06-2011, 04:47 PM
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Default Swap SOHC Head to DOHC Head on SOHC Motor?
Is it possible to put a DOHC Head on a SOHC Block? I was reading the SOHC to DOHC Engine Swap but I do no not want to swap the whole motor out. So is the head interchangeable?
 
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Old 03-06-2011, 04:55 PM
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Yes they are interchangeable and it will up the compression ratio.
 
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Old 03-06-2011, 05:00 PM
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Yes it will bolt right on, but I'm pretty sure you'd have a compression issue. The pistons for SOHC are dished and for the DOHC are domed
 
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Old 03-06-2011, 05:06 PM
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Ok, I was wondering because I have a 97 Neon 2.0 SOHC 5 Speed and I would like to Turbo it.
 
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Old 03-07-2011, 02:37 PM
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As far as a "compression issue" what will that cuase?
 
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Old 03-07-2011, 04:26 PM
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It will just increase your compression. Shouldn't have any clearance issues though. Just increase compression which if you want to turbo, I wouldn't do it.
 
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Old 03-19-2011, 12:44 AM
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Originally Posted by TampaBoy1984
Ok, I was wondering because I have a 97 Neon 2.0 SOHC 5 Speed and I would like to Turbo it.
There are turbos that bolt up to your SOHC head, just so you know.
 
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Old 03-19-2011, 01:03 AM
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Originally Posted by neoncrazy101
Yes they are interchangeable and it will up the compression ratio.
Stock compression ratio for a SOHC is 9.8:1. Swapping over a DOHC head and leaving the SOHC pistons in the block would drop the compression to 9.3:1, ideal for a turbo.
 
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Old 03-19-2011, 08:44 AM
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Originally Posted by das2123
Stock compression ratio for a SOHC is 9.8:1. Swapping over a DOHC head and leaving the SOHC pistons in the block would drop the compression to 9.3:1, ideal for a turbo.
Really? I heard over on the .org that it would raise the compression. Oh well! lol sry for the wrong information.
 
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Old 03-19-2011, 10:34 PM
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Originally Posted by neoncrazy101
Really? I heard over on the .org that it would raise the compression. Oh well! lol sry for the wrong information.
Look at it this way, the SOHC head has higher compression than the DOHC head. The DOHC pistons have a higher compression than the SOHC pistons. DOHC head with SOHC pistons equals lower compression.
 
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