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Home > Help Needed / General Tech Chat > Balancing or bog job?

Rammie2000

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1718 Posts
Member #: 10190
Post Whore

belgium

Just got an engine stripped from a supposed tuner.

I seen lightend crancks but in my idea this is... Well bogg jobb home done on a farm.


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Edited by Rammie2000 on 4th Jun, 2021.

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


stevieturbo

3474 Posts
Member #: 655
Post Whore

Northern Ireland

Looks like fairly normal balancing marks ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


Rammie2000

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1718 Posts
Member #: 10190
Post Whore

belgium

Possible but looked extreme deep to me

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Rod S

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5975 Posts
Member #: 2024
Formally Retired

Rural Suffolk

Some of the metal is removed in the places neccisary to compensate for getting it wrong on the balance weight parts of the crank.
But that's a lot been removed.

Is the crank straight ?

What are the journal sizes, standard or undersize ?

The photos look like some are reground and some aren't.

Schrödinger's cat - so which one am I ???


Rammie2000

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1718 Posts
Member #: 10190
Post Whore

belgium

They are all standard and cranck seems straight when I put it in between the bearings.

I am not tempted to try it out how it runs aqtually

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Rammie2000

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1718 Posts
Member #: 10190
Post Whore

belgium

They are all standard and cranck seems straight when I put it in between the bearings.

I am not tempted to try it out how it runs aqtually

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Rod S

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5975 Posts
Member #: 2024
Formally Retired

Rural Suffolk

Put a new set of bearing shells in the main bearing housings (or some good old ones) and apply some light oil (less than 20/50), put the crank and thrust washers in and lightly tighten the main bearing caps - not full torque, just enough they have seated over the sleeeve dowels - then see how much effort it takes to turn the crank.

If it's straight you will be able to spin it with just your thumb/forefinger.

Any more force required it's either bent or something else seriously wrong.

Schrödinger's cat - so which one am I ???


minimole23

4269 Posts
Member #: 1321
Post Whore

Wiltshire

Looks like a later 1990’s crank from the casting marks. The factory balancing efforts had big chunks of material carved off in all sorts of places from the ones I’ve handled.

On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding

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