69 replies to this topic

[Guess-Works.com]

It helps, but we pretty much knew that... which is why Jammy is working on the tuning guide..

What we still have not got the answer too, and seems to me that there is a lot of technical w**king going on here and now real Yes/No answers..

If you bolt on increased ratio rockers onto an otherwise stock engine without regard for any other item.. Is there a resultant increase in wear to the valve train components... Being Cam, pushrods, rockers, studs, valves, springs and caps ?

Yes or No.

[mini1071s]

Deleted

[prawny1]

Just quickly flicking through this thread, i under stand how using a higher ratio rocker set increases cam wear when not matched with the correct cam/springs,
What i would like to know is what effect would using a full roller/ roller tip rocker set have if they where of the same ratio as std rocker using standard cam and springs.
Would this type of modification be purly beneficial in reducing valve train noise?

[Holly]

cant be bothered to read please summerise lol

[Bungle]

go fast bit might make engine go bang

[Bounce]

This is the topic the spawned the arguement post. Basically, just rockers by themselves will increase wear on your valves, also if they are not matched with the correct cam and springs.

To feel the benifit of rockers you need the correct spring rate and a cam that is comfortable with it.

Your best bet is to get a cam shaft kit that includes the rockers, then you know they all should match.

Some people tend to disagree, saying that rockers do nothing for the life of your engine.

I guess its like marmite, love 'em or hate 'em

[cowboy]

roller tips are good because they reduce friction, with the rollers rolling over the valve instead of sliding over it, it can only make it easier for the rocker to work, hence improving the performance of the engine..


this is my opinion

[miniboo]

dont want to cause friction by bringing this back to page one but there are some interesting pics on this link referring to cam shafts.

http://p211.ezboard....opicID=49.topic

[Guess-Works.com]

Well, bugger me.... evidence from a respected member of the Mini community...

[Wil_h]

Evidence indeed. It proves Mini1071s point entirely, argument over.

I've got a 276 which has done about 40,000 miles running 1.5 (non roller type) and it's in perfect condition.

[Guess-Works.com]

Wil... please explain.. I'm willing to be convinced, but at the moment it's not happening for me...

That piece quite clearly shows the wear induced by 1.5 rockers... probably in an inappropriately configured setup I agree, and I have never disagreed with that fact...

But that's the crux of my point, when used in a configured setup taking into account the cam, valve springs etc then there is no issue..

But when bolted straight on to a std head there is...

Or am I missing something, again... ?

[Wil_h]

And that as far as I can see is the argument. 1.5s cause wear in inappropriate setups. But when used correctly there is no wear issues.

That's what 1071 was saying, that's what you're saying, everybody's happy.

[Guess-Works.com]

So we all agree... Phew can draw a line under that one...

So for Jammy's piece on Tuning and under the section entitled Increased ratio rockers, we can safely put a statement which says something like...

"Increased ratio rockers should be installed along side appropriately designed cams and valve springs, and is advised to buy a configured kit. Installing as a bolt on mod may cause accelerated wear to valve train and camshaft"

Does that sound reasonable ?

[minimole]

yeah thats sounds cool. Is it worth making this sticky or something. i feel that this is a very worth while thread. it would be a shame to only see it summerised without the reasons why. if you see my point.

[Jammy]

LMAO! After all that, I think everyone was trying to argue the same point!!