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Old 11-10-2004, 05:19 AM   #1
shev
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DOHC question

Ok, so dohc is a 4 valve system? right? so the valves move half as much? is this good or bad does it matter? or does dohc not mean that? does this have anything to do with turbo charged? thx.
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Old 11-10-2004, 09:02 AM   #2
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Quote:
Originally Posted by shev
Ok, so dohc is a 4 valve system? right? so the valves move half as much? is this good or bad does it matter? or does dohc not mean that? does this have anything to do with turbo charged? thx.
1. Usually

2. Yes, really

3. Nope

4. Niether, it's simply wrong

5. Bingo

6. Nope

7. You're welcome
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Old 11-11-2004, 12:47 AM   #3
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Quote:
Originally Posted by vwhobo
1. Usually

2. Yes, really

3. Nope

4. Niether, it's simply wrong

5. Bingo

6. Nope

7. You're welcome
job well done
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Old 11-12-2004, 03:48 AM   #4
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Quote:
Originally Posted by shev
Ok, so dohc is a 4 valve system? right? so the valves move half as much? is this good or bad does it matter? or does dohc not mean that? does this have anything to do with turbo charged? thx.

Quite an unsual question for somone who claims they "know how cars work".
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Old 11-12-2004, 09:44 AM   #5
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DOHC = Dual OverHead Cams

It means you have two camshafts over the cylinders in the cylinder head.

Thats all it means. Everything else you asked is either subjective or not relevant.

I hope I got this right, cause I'm learning this right now in college. Engine overhaul unit, woohoo!
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Old 11-17-2004, 12:35 AM   #6
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The car in my sig has a stock DOHC engine with 2 valves per cyl. Most older Ferraris are the same way. Some modern DOHC systems have 5 valves per cyl, and there are a few SOHC systems with 4 valves per cyl.

DOHC simply means dual cams "above" the head/valves. DOHC allows the intake and exhaust cams to be adjusted separately, and it allows for easier engineering of centrally mounted sparkplugs in a hemi or pentroof head design, vs a SOHC setup (though there are some good "hemi" SOHC engines, one of them being the Ford 427 Cammer SOHC egine of the late '60s)

DOHC engines have been around since 1912, and even the US had production DOHC 4 valve per cyl alloy engines by 1932...
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Old 11-17-2004, 05:05 AM   #7
shev
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dsmer wrote
"Quite an unsual question for somone who claims they "know how cars work".

...... i never claimed to know much about it, just that i knew how they worked in general. so y u bein a douche bag?

but thanks everybody else.
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Old 11-17-2004, 06:06 AM   #8
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hey hey hey hey, come on guys, no flaming... please... thats what makes the forum go down hill...
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Old 02-01-2005, 06:04 PM   #9
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Originally Posted by mazda6man
hey hey hey hey, come on guys, no flaming... please... thats what makes the forum go down hill...

VERY TRUE.
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