Toyspeed.org.nz Message Board

by **Chickenman** » Fri Jun 25, 2004 1:33 pm

My query is: What is the difference between twin cam and dohc? if any?
I have heard some people say that twin cam is different and also someone swear that twin cam was dohc.
Looking at my slanty engine compared to a mazda dohc engine.... I'm confused

by **spencer** » Fri Jun 25, 2004 1:40 pm

Dohc = double over head cam = twin cam, as appose to sohc and pushrods

by **strap-on** » Fri Jun 25, 2004 1:57 pm

Chickenman wrote:I have heard some people say that twin cam is different

theres your problem, lots and lots of "experts" in the scene

by **aesc** » Fri Jun 25, 2004 2:22 pm

Its just different manufacturers terminology, both mean the same thing.

by **Distrb** » Fri Jun 25, 2004 2:46 pm

aesc wrote:Its just different manufacturers terminology, both mean the same thing.

and a bit to do with patenting and copyright as well i would imagine....

dont think ive ever seen a toyota branded with "DOHC" before....

Caldina GTT · by **Inane** » Fri Jun 25, 2004 3:02 pm

as far as I know

DOHC is ALWAYs Twin cam (_DUAL_ overhead Cam_)

But I believe Twin Cam isnt always DOHC, as I'm pretty sure you can get non-overhead twin cams

Toyspeed Profile - MrOizo · by **MrOizo** » Fri Jun 25, 2004 4:34 pm

Inane wrote:as far as I know

DOHC is ALWAYs Twin cam (_DUAL_ overhead Cam_)

But I believe Twin Cam isnt always DOHC, as I'm pretty sure you can get non-overhead twin cams

lol so were got one stating how many cams there are... and one stating what, and where also they are :lol:

but yeah toyota have always used twin cam and mazda and others use DOHC :o

by **TE_71 LEVIN** » Fri Jun 25, 2004 4:51 pm

I had a toyota branded DOHC it was TE 71 Corolla GT, i thought it was strange but i've seen pictures of those badges on the program that toyota dealers use to look up model numbers etc...just to be a smart c**t

Toyspeed Profile - MrOizo · by **MrOizo** » Fri Jun 25, 2004 5:03 pm

oops my bad..

maybe toyota realised how ghey DOHC sounded

by **Chickenman** » Sat Jun 26, 2004 1:29 am

Cheers guys....... I think.

My car is blue!

by **Shotgun** » Sat Jun 26, 2004 2:13 am

Inane wrote: I'm pretty sure you can get non-overhead twin cams

Riley had twin cam pushrod engines. We're talking British 30s engines though.

by **NA Drifter** » Sat Jun 26, 2004 3:50 pm

4AFE... is kinna twin cam too eh?

TOYOTA DOHC?.. it cast of the cam cover on the later 2TGEU engines

http://www.angelfire.com/ma/pun/images/own/1eb.jpg

by **MR2SIK** » Sat Jun 26, 2004 4:03 pm

my aw-11 has
DOHC 16V
SUPERCHARGER
on its doors

and
TWIN CAM
16G
on the back

by **93Levin4AGZE** » Sat Jun 26, 2004 5:03 pm

very interesting topic....
maybe they are different...well.....in some parts..
duno....lol

by **wde_bdy** » Sat Jun 26, 2004 6:25 pm

But what do you call a single overhead cam V engine? Is it twin cam (has two cams just on different sides of the block) or DOHC?

Callum

by **ChaosAD** » Sat Jun 26, 2004 7:34 pm

I think FORD *shudder* call them 'OHC'

by **Adamal** » Sat Jun 26, 2004 11:33 pm

When you think about it really, the cams aren't actually OVER the head at all.... They're IN the head!

There for it should be DIHC: Double In Head Cam.

But I guess they figured it sounds like you're saying D I C K!

by **Lloyd** » Sat Jun 26, 2004 11:46 pm

Quad cam anyone?

by **Malcolm** » Sat Jun 26, 2004 11:47 pm

overhead cam doesn't mean the cams are over the head, but infact, that they are "overhead" kinda like a plane flying "overhead". Overhead is relative to the cylinder. In a traditional pushrod engine, the cam is somewhere in the block, so overhead cam distinguishes a good engine from a crap dinosaur engine.

Of course if you really want to be pedantic, you should say camshaft, as cam would indicate it means each individual cam, so a twin cam would have only 2 cams (most 4 cyl 16v toyota camshafts have 8 cams per shaft), and realistically could only run one cylinder.

by **Rob** » Mon Jun 28, 2004 9:05 am

Ford loves the ock(ohc)

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Twin cam = dohc?

Twin cam = dohc?

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