If you run it @ 2000 for 20 mins in neutral at no load you will glaze the rings up.
It's far better to just go for a drive- don't let it idle below 1000 or rev it over 3500. But do put some load on it uphill, to bed the rings in ASAP.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

However...that particular casting is not too homogeneous I can see some fairly bad casting anomalies....the fact that only one rocker let go makes me think that the dud let go whilst the others just weren't happy with coil bind

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"Show me the Mini!"

Doc,

What brand and 1.5 rockers do you use for 1275?
Do you run these rockers with upgraded shaft
Or purchase as a whole unit?

Hhhmmmm,,,, looks very much like coil-bind to me Greame

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

These rockers come with an upgraded shaft, but you have to assemble them.

I run the early FORGED version of these rockers on my car, they used to be good.
I was less than impressed with the set of Minispares 1.5 roller tip ones that Lillee fitted recently, 6 of the 8 adjusters were bent.

If I was buying new 1.5 rollers I'd think about these-
http://www.med-engineering.co.uk/catalo ... rocker-set
These rockers are unbushed, the bigger diameter shaft runs direct in the (aerospace) alloy. But so do the cams of many OHC engines, so it works.


You can also use modified early Toyota Corolla rockers, it takes a fair bit of machining though to do it properly. These give a ratio around 1.46:1.
See the hi-lift 1.5 rocker sticky thread at top of the mods forum.
http://www.ausmini.com/forums/viewtopic.php?t=3829

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Yep,

After a new set, for 1275 Cooper S

Can you buy these locally?

Anyone else running these rockers from MED?
http://www.med-engineering.co.uk/catalo ... rocker-set

Just import them, deliver straight to your door

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Lillee - 1969 Morris Mini K

What Lillee said ^^^. If you could get them locally they would be dearer.


Yes Mickmini is running a set, but his are the more expensive version on the MED site.
http://www.med-engineering.co.uk/catalo ... ld-rockers

Lindsay Seibler sells the Titan race ones, expensive but good.
http://www.minis.com.au/minis/catalog/p ... ts_id=1071

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I have the minisport 1.3 version... done 25000k's and still look fine - the rollers & adjusters are all good

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did I tell you that I won a trophy?

Just getting my motor back in the next week with a set of these med ld rockers, engine builder was impressed with the quality along with there push rods, will report back. Bought them direct, there is no Aussie distributor but delivery was under a week

what about these, for quality and price?

http://www.med-engineering.co.uk/catalo ... ier-duplex

have spotted these Australian made?, quality?



http://www.minisport.com.au/prod828.htm

Yes the Rollmaster duplex kit is well made, however I found the multiple keyways in the crank sprocket bloody confusing (instructions notwithstanding) and chose to use an offset cam key instead.
It comes with a decent chain on it too- not the $6 rubbish that other duplex kits supply.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Where's the best For quality and price for 1275 prmary gear pre A-plus

Probably Karcraft unless you want to bring one in from Minispares UK, for example. Might be cheaper to buy there, I've not checked lately. But postage to Oz on small items is a killer now.

[edit] I checked Minis Plus but it's not listed there.

[edit 2] £98 at Minispares = ~$150 + postage.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

The other thing that happens is the valve guide grabs the valve midway thru its stroke

The valve stops the energy has to go some where when the piston hits the valve

Unfortunatly i have been there