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Greetings All.

Sorry to be a pain, but im not very....learned in the engine world. I just wanted to know what these stand for, and how they would effect an engine.

Cheers,
--Tonba
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SOHC: Single OverHead Camshaft
DOHC: Dual OverHead Camshaft

I'll leave the more complicated stuff to the learned, however this is a goldmine:

:arrow: http://www.womanmotorist.com/index.php/news/main/2303/event=view

Some quotes:

"Having two overhead cams refers to having an individual camshaft to operate the intake valves and one to operate the exhaust valves. This can allow better placement of the valves in the combustion chamber at a better angle for maximum performance."

"Separate camshafts allow the use of a lighter and more compact valve systems and better cylinder breathing which allows for smoother high RPM operation. By allowing for this, peak power can be had through the use of high revolution instead of the more traditional method of using larger cylinders. This helps to keep engines smaller, lighter, and more fuel-efficient without sacrificing power."

"DOHC engines have twice as many intake and exhaust valves as a SOHC motor, they run cooler and more smoothly, quietly, and efficiently."

NOT MY MATERIAL SO DON'T QUOTE ME AND TELL ME I'M WRONG!

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Thanks....

I suspected thats what it ment. How would this effect my cars performance?

--Tonba
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SOHC: Single OverHead Cam
DOHC: Dual OverHead Cam

I'll leave the more complicated stuff to the learned.

And that's per bank of cylinders.

That means that on a V6 there's 2 cams for a SOHC engine and 4 for a DOCH, (which also gets labelled as Quad Cam by Toyota)

Twin cam is DOHC for an inline engine but typically used on 4 cyl cars.

As far as performance goes. A cam operates the intake and or exhaust valves. If they can run seperatly and vary the timing between intake and oulet phases then it optimises flows and produces more power. That's where VTEC, Mivec, VVTi etc all come from.

Does Ford have something similar and if so what do they call it?

Ford has a DOHC 32v V8, they just call it DOHC, as "QuadCam" is actually a Toyota trademark now.

Does Ford have something similar and if so what do they call it?

Yup, as KB said, and they have some valve timing happening on some engines too. There are engines with quad cams that don't really make much use from it :roll:

a more detailed explanation of cams

http://auto.howstuffworks.com/camshaft.htm

also stuff on turbos

http://auto.howstuffworks.com/turbo.htm

enjoy ur reading ;)

What is a Mitsubishi Magna TR then? DOHC? I am thinking its a SOHC.

Yup, unless you've done a Killbilly :)

Yup, unless you've done a Killbilly :)

lol Yep, the stock TR V6's and 4's are SOHC.

"DOHC engines have twice as many intake and exhaust valves as a SOHC motor, they run cooler and more smoothly, quietly, and efficiently."

they're wrong.... A SOHC can have 4 valves per cylinder (24 Vales total for a 6cyl car).... like the 6G72's and 6G74's found in 3rd gen magna's!!

oh and some cars have 3 valves per cylinder as well.... i think its a European thing though... where there are 2 smaller intake valves and the exhaust valve is a big arse one.

I love the internet, but damn i wish people(not you al3x) would get shit right!!!

And yes FORD also have DOHC in their I6 'Barra' engine (as well as their V8's)

oh and some cars have 3 valves per cylinder as well.... i think its a European thing though... where there are 2 smaller intake valves and the exhaust valve is a big arse one.

Yeah, and I think some even have 5.

[quote:9c3e7b1fa5="dingo"]oh and some cars have 3 valves per cylinder as well.... i think its a European thing though... where there are 2 smaller intake valves and the exhaust valve is a big arse one.

Yeah, and I think some even have 5.[/quote:9c3e7b1fa5]yeah? wonders never cease!! actually, i think i've heard of them too... they also have 5cyl cars... now thats just weird!!! (bloody Ovlov's)

I'm not going to bother reading all the previous posts and jump in here. Technically, I think our engines are 'SOHC' because they have a Single overhead camshaft per cylinder bank -- but have two banks so some people call them DOHC...

Expanding on that, some people with Killbillys motor call them QUAD-CAM for the same reason. They have 4 camshafts.

I'm not going to bother reading all the previous posts and jump in here. Technically, I think our engines are 'SOHC' because they have a Single overhead camshaft per cylinder bank -- but have two banks so some people call them DOHC...

Expanding on that, some people with Killbillys motor call them QUAD-CAM for the same reason. They have 4 camshafts.yep, you should have read the following posts 8)

yep, you should have read the following posts 8)

Hahaha!

I want to see KB's car with a Toyota QuadCam badge!

If you want to ask a question about camshafts, SOHC, DOHC or Quad cam or whatever configuration, feel free to contact me by email ( chris@wadecams.com ) through the Company l work for, WADE CAMS, or, take a look at our website.....www.wadecams.com. Make sure you have your speakers on!

I would be happy to pass on any questions to our technical staff.

Cheers

I would be happy to pass on any questions to our technical staff.

Okay, when are you going to grind some new cams for Magnas? :lol:

It's funny being a toyota driver part time, with a DOHC V6, I don't think mine is called a quad cam. I think the earlier camrys with the 2.5 V6 (the smaller ones, about 1990 vintage) had their badge on the back with quad cam. The other cars I have seen it on are V6 Mazda 626 and Ford Telstar variants, the big swoopy hatch ones about 1995 ish. I haven't seen it on a Toyota for a while.

The other 5 valve motor is also a Toyota one, it was a 20V version of the Corolla twin cam 1.6 in the boxy "Twin Cam 16" hatches. One serious motor, 1.6L, had quad throttle bodies, twin cam, 5V per cylinder, and something well in excess of 100kW, like about 120-130kW, without variable valve timing!

[quote:e06803e280="dingo"]yep, you should have read the following posts 8)
Hahaha!
I want to see KB's car with a Toyota QuadCam badge![/quote:e06803e280]oops... make that previous posts :oops:

Lots of Audis have 5 valves per cylinder, also lots of VWs, V
W also produces/produced a 5 cylinder motor, they fitted this to the Bora among other models. :D

Mercedes recentlly reverted back to a 3 valve per cylinder design, claiming it was easier to control emissions without really effecting power output.

Now I have heard of V5 engines before (my sister had a Bora) but what I wnt to know is how the shit do they balance 5 cylinders in a v configuration??????? :?: :?:

Now I have heard of V5 engines before (my sister had a Bora) but what I wnt to know is how the shit do they balance 5 cylinders in a v configuration??????? :?: :?:

The angle of the "V" formations is so narrow that they only used 1 cyclinder head making this designe less prone to vibrations, but I think they used different sized ballance shafts on each side of the block

Yeah, it's basically a compressed inline engine. Works well and that's what their W10 is based on, I think.

Yeah, it's basically a compressed inline engine. Works well and that's what their W10 is based on, I think. yeah, i heard that too... its like to V5's side by side!!! now thats compact!!

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Greetings All.

Thanks for the info guys. Ive got a mate that sells jap inport cars. An he has a couple of mitsubishi eclipse engines laying around. Am i right to believe that these are 3.0L DOHC? Do you think one would be easy to install in a TE magna?

Cheers,
--Tonba
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Greetings All.

Thanks for the info guys. Ive got a mate that sells jap inport cars. An he has a couple of mitsubishi eclipse engines laying around. Am i right to believe that these are 3.0L DOHC? Do you think one would be easy to install in a TE magna?

Cheers,
--Tonba
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A dohc 24v 6G72 wont go in a TE+ but will go in a TR/TS (bolt in if you're going from a sohc 12v 6G72). But the DOHC 24v MIVEC 6G72 will bolt into a TE+ If you can get your hands on one of these puppies you'll be cheering that's for sure!

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Greetings All.

Thanks for the info guys. Ive got a mate that sells jap inport cars. An he has a couple of mitsubishi eclipse engines laying around. Am i right to believe that these are 3.0L DOHC? Do you think one would be easy to install in a TE magna?

Cheers,
--Tonba
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Aren't the Eclipse the 2L Turbo for the USDM? Or do you mean GTO/3000GT 6G72 Engine?

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I thought the GTO 3000 6g72 engine was the same as the TE 3.0L just twin-turboed?

How much do you think a DOHC 6g72 24v MIVEC would cost me? Would it fit in a TE? How much you think i can...try and get one for?

Cheers,
--Tonba
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From what I've seen they're DOHC. There was a front cut up here for 4k. It's from a Diamante. I reckon you could talk him down.

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Would it fit in my TE without too much hassle? I know id need to get a new trasmission with it. . . anyone hear 6 speed? :badgrin:
Oh by the way, is there any poduct that can help prevent/eliminate torque steer?

Cheers,
--Tonba
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Strut brace should help with torque steer.

I reckon it would fit and mate but I just don't know. The thought of doing the swap is still running around my head.

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I thought the GTO 3000 6g72 engine was the same as the TE 3.0L just twin-turboed?

How much do you think a DOHC 6g72 24v MIVEC would cost me? Would it fit in a TE? How much you think i can...try and get one for?

Cheers,
--Tonba
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The GTO is a DOHC 24v 6G72 non mivec, it sits the same way around in the engine bay as a SOHC 12v 6G72 found in V6 TR/TS KR/KS Magnas and Veradas respectively.

The DOHC 24v 6G72 MIVEC is found only in the Diamante 30M and it sits the same way around in the engine bay as the TE/KE+ V6's

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Greetings All.

MIVEC me up then!!! :badgrin: :lol:
Must contact . . . friend with many many jap inport motors :roll:
Need to source a block and six speed aftermarket box then!!!

Cheers,
--Tonba
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The DOHC 24v 6G72 MIVEC is found only in the Diamante 30M and it sits the same way around in the engine bay as the TE/KE+ V6's

does that mean it could fit in a TJ?

[quote:2fa5c63abc="Killbilly"]
The DOHC 24v 6G72 MIVEC is found only in the Diamante 30M and it sits the same way around in the engine bay as the TE/KE+ V6's

does that mean it could fit in a TJ?[/quote:2fa5c63abc]yes