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Posted on Tuesday, February 12, 2013 at 6:48 AM
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Holley
Posts: 759
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I wonder why nobody talks or advertises the number of valves a car has anymore? When I was a kid it was one of the most important stats. It was 0-60, top speed and then whether it was a 16v, 24v etc. At school mates would say, my dad has bought a 16v escort. Even though escorts were rubbish, because it was a 16v it was automatically brilliant. But nobody knew why more valves were good, it just was - fact! Ones that stick out from memory were the Golf Gti 16v, Quattro 20v and of course the daddy of them all, the Vauxhall Carlton 3000 24v. And then Audi and Ferrari introduced 5v per cylinder. Wow. Didn't now why this was a wow but 5v per cylinder, now that most be good. I think if the Veyron existed 20 years ago with its 64 valves, I think I would have exploded with excitement  Now though, no magazines mention valves in their write-ups as an interesting feature and no cars advertise it on their rear. Maybe it's because it was all a load of b@ll@cks! Good times though 
Updated February 12, 2013 at 10:45 AM
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Posted on Tuesday, February 12, 2013 at 7:12 AM
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mattcambs
Posts: 4838
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I suspect it is because 5 per cylinder is the practical limit and has been for a while so therefore there is nothing new to talk about from a marketing point of viee.
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My Flickr Invisible Speakers
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Posted on Tuesday, February 12, 2013 at 7:39 AM
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Holley
Posts: 759
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mattcambs said... I suspect it is because 5 per cylinder is the practical limit
Is it? Edit. Not being argumentative, just wondering
Updated February 12, 2013 at 7:40 AM
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Posted on Tuesday, February 12, 2013 at 8:27 AM
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pilouil
Posts: 1331
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Holley said... mattcambs said... I suspect it is because 5 per cylinder is the practical limit
Is it? Edit. Not being argumentative, just wondering
The goal is to maximise the surface of the valves compared to the surface of the cylinder - all being circular, and the centre of the cylinder is hosting the spark plug.
Looking at the picture here you'll find it difficult to add any valve; the system is already complex because the three intake valves are not aligned.
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Pilouil
Citroen C3 1.4 HDI 69.0424 bhp
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Posted on Tuesday, February 12, 2013 at 8:35 AM
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Jobbo
Posts: 38161
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Holley said... Now though, no magazines mention valves in their write-ups as a interesting feature and no cars advertise it on their rear. Maybe it's because it was all a load of b@ll@cks! Good times though
It's not b0llocks but it is irrelevant - the only reason for mentioning it in the first place was a marketing advantage. Funnily enough the majority of cars have turbos now and you don't see those mentioned either, yet even vacuum cleaners and aftershave were 'turbo' in the 1980s. Sadly even the number of cylinders seems to have become irrelevant these days 
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[OO=[|]=OO]
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Posted on Tuesday, February 12, 2013 at 9:06 AM
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Holley
Posts: 759
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Jobbo said... Holley said... Now though, no magazines mention valves in their write-ups as a interesting feature and no cars advertise it on their rear. Maybe it's because it was all a load of b@ll@cks! Good times though
Funnily enough the majority of cars have turbos now and you don't see those mentioned either, yet even vacuum cleaners and aftershave were 'turbo' in the 1980s.
That's a good point. Now a turbo 16v was the bees knees. I remember feeling slighly disappointed that my dad's 21 turbo was only a 8v. Damn those cosworths
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Posted on Tuesday, February 12, 2013 at 9:47 AM
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Orange Cola
Posts: 5609
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It was when technology was changing, 8 valve engines were old and 16's new and more efficient (which usually meant more power, new engine and better fuel consumption)
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Posted on Tuesday, February 12, 2013 at 10:15 AM
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robinoz
Posts: 888
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Orange Cola said... It was when technology was changing, 8 valve engines were old and 16's new and more efficient (which usually meant more power, new engine and better fuel consumption)
My car has 30 valves. No replacement for displacement. Cubes torque etc
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I'd rather be wrong than dull
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Posted on Tuesday, February 12, 2013 at 10:19 AM
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mik
Posts: 12524
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My car has 16v. It is awesumes.
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Posted on Tuesday, February 12, 2013 at 10:30 AM
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Delphi
Posts: 7567
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My 200sx used to proudly claim "16 valve Turbo" on the back of it. The last car I had that displayed anything remotely like that was the 20vT badge on the back of my Leon Cupra.
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Something witty goes here..... Jorg Gray Ltd Edition Watch Number : 313631
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Posted on Tuesday, February 12, 2013 at 10:33 AM
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Sundayjumper
Posts: 7773
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When my Dad had his Chimaera I kept threatening to stick a "16V" badge on the back 
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I think my neighbour misunderstood when I said 'I can't wait for the next 911'
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Posted on Tuesday, February 12, 2013 at 10:51 AM
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Orange Cola
Posts: 5609
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robinoz said... Orange Cola said... It was when technology was changing, 8 valve engines were old and 16's new and more efficient (which usually meant more power, new engine and better fuel consumption)
My car has 30 valves. No replacement for displacement. Cubes torque etc
Robinoz on his way to work, laughing at all the Veyrons he passes with their puny 8litre engines 
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Posted on Tuesday, February 12, 2013 at 11:17 AM
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_Andy
Posts: 857
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A guy called Francesco Romanelli made some 6v per cylinder twin plug heads for the Ducati 900SS/SL's back in the 90's. They were a great improvement over the standard items, but they never made it into production. 
More pics here (Japanese) I'd love a 900SL with a set of those on it 
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Spazda MX-5/Honda CRF450R/VX220/VFR400
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Posted on Tuesday, February 12, 2013 at 1:00 PM
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Holley
Posts: 759
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mik said... My car has 16v. It is awesumes.
My new car (when it arrives  ) will be 24v which means it's automatically better
Updated February 12, 2013 at 1:01 PM
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Posted on Tuesday, February 12, 2013 at 1:39 PM
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Bluebird
Posts: 57
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Honda developed a V4 motorbike engine with 32 valves. Cylinders were oval to accomodate all the valves.
http://en.wikipedia.org/wiki/Honda_NR
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Posted on Tuesday, February 12, 2013 at 1:43 PM
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Rich B
Posts: 21379
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NotoriousREV said... My current fleet has a total of 48 valves.
my garage has a sad 44 from 2 cars (including the gfs new car!)
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Cheers Rich
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Posted on Tuesday, February 12, 2013 at 1:46 PM
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JustMax
Posts: 936
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Bluebird said... Honda developed a V4 motorbike engine with 32 valves. Cylinders were oval to accomodate all the valves.
Clickity
Weird looking thing with two con-rods per piston. 
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Posted on Tuesday, February 12, 2013 at 1:48 PM
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Jobbo
Posts: 38161
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JustMax said... Bluebird said... Honda developed a V4 motorbike engine with 32 valves. Cylinders were oval to accomodate all the valves.
Clickity
Weird looking thing with two con-rods per piston.
It's basically a V8 fiddled with to fit the rules which only permitted a maximum of 4 cylinders. A fantastic folly.
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[OO=[|]=OO]
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Posted on Tuesday, February 12, 2013 at 1:53 PM
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caneswell
Posts: 4276
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Jobbo said... JustMax said... Bluebird said... Honda developed a V4 motorbike engine with 32 valves. Cylinders were oval to accomodate all the valves.
Clickity
Weird looking thing with two con-rods per piston.
It's basically a V8 fiddled with to fit the rules which only permitted a maximum of 4 cylinders. A fantastic folly.
I thought it never really worked as the blowby was rubbish with none round rings?
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Cheers,
Mike
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