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Home > Help Needed / General Tech Chat > 5/16th block/gearbox mod

wolfie

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8174 Posts
Member #: 90
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Somewhere around Swindon

Is it still worth doing doing the 5/16 bolt mod between engine and box?

Crystal Sound Audio said:

Why wolfie...you should have your name as Fuckfaceshithead !


"A common mistake that people make when trying to design something completely
foolproof is to underestimate the ingenuity of complete fools."-Douglas Adams


jonny f

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2080 Posts
Member #: 9894
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Dorking

What would be the reason not to?

It seems to increase strength and reduce the chance of lift between the two.


shane

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2502 Posts
Member #: 1246
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Lowestoft, Suffolk.

For how easy it is to dots a no brainer.

Shane


madmk1

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5411 Posts
Member #: 6181
Double hard bastard

brookwood woking

I have never done it lol

Maybe I am lazy then 😂

I have started posting on Instagram also my name on there is turbomk1mini

Nothing is impossible it just costs more and takes longer.

On 1st Nov, 2007 Ben H said:
There is no such thing as 'insignificant weight saving', it all adds up.


John

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10007 Posts
Member #: 1456
Mongo

Barnsley, South Flatcapshire

I think Dave used to sell some uprated cap-heads and hardened washers. I used to run those.

If something is worth doing, it's worth doing half of.


minimole23

4269 Posts
Member #: 1321
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Wiltshire

I did it because a long established engine builder told me to!

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


madmk1

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5411 Posts
Member #: 6181
Double hard bastard

brookwood woking

I just used good grade 1/4unf bolts and nice sized washers all was good 👌

Never ever have I had a block lift off a box

Used to have a head that lifted on the dyno lol

But never a block off a box 😂😂

I have started posting on Instagram also my name on there is turbomk1mini

Nothing is impossible it just costs more and takes longer.

On 1st Nov, 2007 Ben H said:
There is no such thing as 'insignificant weight saving', it all adds up.


Mr Joshua

2343 Posts
Member #: 1954
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Luton Bedfordshire

I swapped to bi-hex bolts the same as used on the jet pipes of gas turbine engines due to access on tightening.

Edited by Mr Joshua on 20th Sep, 2021.

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e5tus

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301 Posts
Member #: 10128
Senior Member

Dorset

I wasn't aware of this, makes complete sense. Will add to the list next time there's a need to split block and box. Always learning!


Mr Joshua

2343 Posts
Member #: 1954
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Luton Bedfordshire

https://www.ebay.co.uk/itm/183773005074?has...ncAAOSwrv5cimpV
These aren't them but just for image reference

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Rammie2000

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1719 Posts
Member #: 10190
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belgium

Why? How much force can there be between those 2 that it needs additional strength.??

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

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