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Old 03-14-2005, 01:01 AM   #1
Kardon
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Question Sohc/dohc

Is there any performance difference?
Would a 250hp DOHC perform the same as a 500hp SOHC? Or is there no ratio?
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Old 03-14-2005, 01:14 AM   #2
Import-tuner
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first of all do you know the difference between dohc and sohc?
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Old 03-14-2005, 01:19 AM   #3
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Not really, I thought DOHC was the standard, then I was browsing and saw that the Mustang is a SOHC. So I'm not sure of the difference.
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Old 03-14-2005, 01:34 AM   #4
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SOHC = single overhead cam (1 cam)
DOHC = Dual Overhead Cam (2 cams)

sohc = less valves = get air in/out semi-fast
dohc = more valves = get air in/out faster,

car companies generally use SOHC to make cars cheaper.
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Old 03-14-2005, 02:05 AM   #5
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Quote:
Originally Posted by Godlaus
SOHC = single overhead cam (1 cam)
DOHC = Dual Overhead Cam (2 cams)

sohc = less valves = get air in/out semi-fast
dohc = more valves = get air in/out faster,

car companies generally use SOHC to make cars cheaper.
Sooo... A SOHC engine with a four valve head has less valves than a DOHC engine with a two or three valve head? How exactly does that work?

Think, type, submit.
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Old 03-14-2005, 02:11 AM   #6
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DOHC and SOHC are generally just for timing... my DX civic is SOHC, and it has just as many valves as an SI DOHC civic... you just get a little more controll over timing with DOHC than you do with SOHC
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Old 03-14-2005, 02:21 AM   #7
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Quote:
Originally Posted by vwhobo
Sooo... A SOHC engine with a four valve head has less valves than a DOHC engine with a two or three valve head? How exactly does that work?

Think, type, submit.

I was generalising, my bad. A Ford gt uses somehting like 32 valves off a pushrod, but was speaking in general terms.

Welcome back, by the way.
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