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Model specific boards => Golf mk2 => Topic started by: benross on 02 April 2006, 19:59

Title: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: benross on 02 April 2006, 19:59

 :wink:
Just thinking... If the 16v is so much better than the 8v- purely because the 8v only has 2v per cyl... why are the bulk of VRs only 12v.

Strange eh 

Slick... Not carrying on the argument youve locked jus thought id say!

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: steviem on 02 April 2006, 20:08

is it because it used a cam/bank at first? But they started doing 24v vr6s later on where  one cam was inlet and the other was exhaust...

It was just progression of head designs....

Also compare a Hemi V8 with a Mercedes or BMW V8, you'll find the Euro engines use more valves and are better engines compared to the 40 or 50 year old tech used by the yanks...

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: benross on 02 April 2006, 20:14

Im fishing mate- was hoping for someone to bite!

 :grin:

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: VeeDubGTI16v on 02 April 2006, 20:17

 :lipsrsealed:

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: steviem on 02 April 2006, 20:18

Oh sorry,

Blah Blah bhp blah blah progress 8 valves crap blah blah 16 valves the best  :laugh:

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: benross on 02 April 2006, 20:26

 :grin:

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: Neaty on 03 April 2006, 00:57

at which point did they start using 24valves in the VR6?

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: AudiA8Quattro on 04 April 2006, 18:25

Quote from: Neaty on 03 April 2006, 00:57

at which point did they start using 24valves in the VR6?

Mk4 v6 4 motion
By the way both engines are DOHC

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: Dizzie on 04 April 2006, 21:52

does the vr6 use rockers to control the valves further away from the cam?

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: Neaty on 05 April 2006, 13:54

Quote from: golf-vr6 on 04 April 2006, 18:25

Quote from: Neaty on 03 April 2006, 00:57

at which point did they start using 24valves in the VR6?

Mk4 v6 4 motion
By the way both engines are DOHC

you see thats the bit i dnt understand, they are 12 valve but are double over head cam...would some one care to explain!  :smiley:

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: jezza16v on 05 April 2006, 15:08

Its a narrow V arrangement with two rows of three cylinders hence minimum one camshaft for each row of cylinders regardless of number of valves.  :smiley:

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: steviem on 05 April 2006, 15:13

yeah, whereas most v6s have a head per bank of cylinders, the vr6 has one head for both, so thats why theyre all classed as dohc

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: Neaty on 05 April 2006, 15:22

ah i see, i suspected that was the case!

thanks for that!

Title: Re: Just thinking... Wonder why most VR6 are 12v when more valves the better?! ahem
Post by: steviem on 05 April 2006, 16:26

wikipedia is great for useless information...