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What let go
Crank/Bearings 76%  76%  [ 19 ]
Rods 12%  12%  [ 3 ]
Piston 12%  12%  [ 3 ]
Total votes : 25
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Beanie
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PostPosted: Mon Oct 01, 2007 12:00 pm 
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Let this serve as a warning to anyone with an unbalanced motor keep them below 5500rpm because this let go with out warning oil presure was still at 65psi right before it went no vibrations nothing just bang .....

and hey i would do it all again to chase down that evo 6

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slinkey inc
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PostPosted: Mon Oct 01, 2007 12:01 pm 
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Crazy!

What kind of crank is that (Big J?)? Did you have it crack tested etc before building the motor?

You must have really thrashed that motor! :shock:
<edit> Not that that's a bad thing. 8)

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1964 Morris 850, 1330 Supercharged - 81.8hp atws.
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1977 Leyland Mini LS - Project LS-T 8)
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Beanie
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PostPosted: Mon Oct 01, 2007 12:06 pm 
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Yeah stock big J

i bought the motor second hand i knew it wasn't balanced don't know much more
about it...

Guess the rev limiter shouldn't have been set at 6200
maybe at 5800 where the power droped off

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'69 MINIMATIC.... 9 year resto still on the go
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slinkey inc
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PostPosted: Mon Oct 01, 2007 12:08 pm 
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Oh well, at least the cranks are in big supply, if if were an S crank or something it would be an expensive repair to find another in good nick.

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1964 Morris 850, 1330 Supercharged - 81.8hp atws.
1975 Leyland Mini S 1100S powered - Nice and reliable.
1977 Leyland Mini LS - Project LS-T 8)
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czerial
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PostPosted: Mon Oct 01, 2007 1:47 pm 
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thats bad luck mate, but its nice to have an eexcuse to rebuild your motor.!

I know of a good stroker in Adelaide youcould quite easily steal in a few weeks
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drmini in aust
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PostPosted: Mon Oct 01, 2007 1:56 pm 
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If buying a 12G1505 big journal crank, get it crack tested first.
St George Crankshafts told me that out of the last 5 he got sent to grind, 3 were cracked.... :shock:

A later Metro crank is probably a better bet, as it's not 30+ years old.
They drop straight into an 1100S or 1275LS block.

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Spaceboy
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PostPosted: Mon Oct 01, 2007 5:28 pm 
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what are your plans now, are you going to build it bigger and better?
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willy
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PostPosted: Mon Oct 01, 2007 7:47 pm 
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Spaceboy wrote:
what are your plans now, are you going to build it bigger and better?


Build a proper engine this time :lol:
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cush
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PostPosted: Mon Oct 01, 2007 9:22 pm 
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w***y wrote:
Spaceboy wrote:
what are your plans now, are you going to build it bigger and better?


Build a proper engine this time :lol:


yeah.. build one just the way will bought his..

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Last edited by cush on Mon Oct 01, 2007 10:13 pm, edited 1 time in total.

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Spaceboy
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PostPosted: Mon Oct 01, 2007 9:33 pm 
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what does that mean
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czerial
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PostPosted: Mon Oct 01, 2007 9:44 pm 
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send it to Graham Russelll! :P
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Spaceboy
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PostPosted: Mon Oct 01, 2007 9:48 pm 
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i'm thinking a brickworx racing engine :)
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slinkey inc
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PostPosted: Mon Oct 01, 2007 9:53 pm 
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Or Rhemac if you've got the dosh. I don't personally like the people at Rhemac, for various reasons, but apparantly they do good engine work.

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1964 Morris 850, 1330 Supercharged - 81.8hp atws.
1975 Leyland Mini S 1100S powered - Nice and reliable.
1977 Leyland Mini LS - Project LS-T 8)
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cush
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PostPosted: Mon Oct 01, 2007 10:11 pm 
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Spaceboy wrote:
what does that mean


just pointing out that will didn't actually build his, unlike how his sentence suggests ;)

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willy
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PostPosted: Mon Oct 01, 2007 10:15 pm 
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Knowing Beanie he probably will have a 'go' at building it himself.
My sentence still stands.

:roll:
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