Agree- gaskets and seals add up then if you doing it to that extent may as well get it near perfect - just had to get new bushes for the gear change lever as they were worn 20 thou one way and 17 thou the other - bit of a slop now the gear change should be a bit smoother

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David L


My greatest fear in life is that when I die my wife will sell my Mini and tools for the price I told her I paid for them!

thanks for all the tips and information

what will the 1.3 off set rockers do for me, will it change the duration times for valves???

cheers leighton

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1975 Leyland Mini: 1060cc - resto/ ex-hsc project.

Not sure you would need 1.3 offset rockers. The std ones will see your build through fine. I would spend the $$ on other area's

If you want a mini to perform, start with the head, thats the biggest restriction. Spend some $$ and talk to Graham Russell about head work (to what you can afford) and an RE13 camshaft to suit.
HS4, opened up head, RE13 and an exhaust will suprise you in terms of power gains and performance.

Cheers,
Peter

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Click here for the Turbo Conversion Thread!

ok so i probably would need the 1.3 offset rockers, but for future reference whats the advantage of them??

ive got the exhaust and HS4

cheers leighton

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1975 Leyland Mini: 1060cc - resto/ ex-hsc project.

The 1.3 rockers give you higher lift and hence more power. Great for a racing car where you want to get the absolute maximum but probably not necessary in a road car.

It would be a good idea to have a chat with Graham Russell. He's a good guy and really knows his stuff. He will tell you exactly what you need to get the result you want within your price range. He won't point you towards big dollar mods either.

I have built quite a few performance Mini engines over the years but the one that Graham spec'd and machined up for me goes way better than any I had done. The quality of his machining is top notch, I measure all the clearances while assembling and it was all absolutely spot on. Impressive. I'm a very happy customer.

Pete

Don't confuse offset bushed rockers with 1.5:1 high lift rockers.
Putting UK made offset bushes into pressed steel or Cooper S forged rockers give you about 1.25:1, which is the ratio a standard rocker should have, but never does- I found they vary from 1.16 to 1.21:1.

The ones I make here by converting pressed steel rockers have .044" offset and give a 1.3:1 ratio.
On a smallbore 1098 1.3s are worth a few HP, according to Vizard.
On a bigbore they will give you a bit more all the way up, great for road use.

1.5:1 rockers (forged or roller) are used on 1275 and up race motors, they give more top end (4500 up) at the expense of bottom end torque. Pretty much a waste of time on any roady smallbore.
I run them in our 1293 and 1360, as I don't mind losing a bit of lowdown torque.

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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.