I was just thinking today, that V8s are usually two banks of 4 cylinders with the one cam per head, right?

Well modern 4cyl engines are twin cam per head.... how come this doesn't get used for V8 heads? Would it be a nightmare to implement?

Or am I missing a very simple answer??

 

Mate, loads of quad cam V8's about nowadays

 

Most V8s are a cam in block OHV design from what I can tell.

Quad cams are around though.

 

There's a lovely example...


http://www.powertecracing.com/pdf_do.../v8_phase3.pdf

 

I knew there would probably be some somewhere but they're not exactly mainstream are they? What's the reason for this?

Do the quad cams make mor epower in general?

 

Pure expense, reduce the number of cams lowers the cost. Only the expensive tuned V8's where people dont mind paying a bit extra get them usually.

 

a quad cam V8 makes more power over a normal V8 in exacly the same way a a normal 4 cyl 16V makes more power than equivelent 8V

 

errr, what v8 engines are there on the market?

i can only think of the audi series of v8's and the ford v8 from the mustang?

fords is probably the same design from the 1960's and the audi lump is quad cam.

 

Err, almost all modern PERFORMANCE V8s are quad cam.

Audi and Ford, the ones just mentioned, both are.

 

http://www.rsportscars.com/eng/artic...g63_engine.asp

some of that please AMG63 engine

 

I think the V8s in the MG ZTs are twin cam, not quad cam.

Of course the engine probably isn't classed as modern

Hey I'm here to learn, what can I say.

Thanks for the info

 

m3 in sep

 

Better start reading about engines, you seem to be a bit out of touch.
There are very few car manufacturers that DON'T make V8s

.

.

 

correct, and do you know why? cos it's a ford v8 engine!

 

no, as the top PERFORMANCE ford ones are QUAD cam

 

focus v8, okie dokes, how many mainstream v8's on the current market, other than vag & ford ? ok so you got mercedes [fucking good picture btw] and bmw but thats about it?

 

and people can wank off all they like about how many cams an engines got, it dont matter a shit, its how strong and powerful the fucker is for the money spent, and the pushrod single cam fuckers still pretty much rule over most stuff you can get on the market no matter how flashy it is.

 

Enlighten yourself.

.

 

Clip of andy hornes 6r4 with the powertec v8 in....

http://www.youtube.com/watch?v=Kf07L42gLKQ

 

Aye I knew it was a Ford, which i found odd lol. Do love the idea of having a nice V8 one day though

 

M5 Quad Cam, Variable inlet and Exhaust Timing....about as advanced as you can get.........Lots of quad cam V8's out there....Ford Mustang 4.6ltr..Quad Cam......Where have you been..

 

A single cam V8 can make more power than quad cam V8, if it is tuned that way.
The reason why most newer engines in general are twin cam(4 cyl) or quad cam V8 is to do with VALVES.
The more valves you can get in the chamber the better the emissions and power can be made, two smaller inlet valves delivering a consequently higher port velocity than a single big one will produce more torque, and have better tractability.
With this in mind it is easier to arrange a seperate cam for each set of valves, due to space in the head design.
Of course some engine don't have cams at all, some have aspin valves are so are desmodromic drive, VERY VERY few though, never seen one just read about them.
tabetha

 

Dunno just didn't realise to be honest. Are any of the old school Mustang's qud cam?

 

Old late 60s, early 70s Mustangs will be either Cleaveland or Windsors. OHV, cam-in-block.

Not too sure about the big-block ones though......

 

here's a single cam V8

http://www.youtube.com/watch?v=yT_VHmUijV8

and a quad cam V8 shame the sound's crap, but you get the idea

http://www.youtube.com/watch?v=XAcdg...elated&search=

 

and the best sound i think, quad cam with super charger

http://www.youtube.com/watch?v=2lQX3...elated&search=