Center Main Straps
Turbo Mini Forums

One of the English bolt suppliers is marketing everyday usable bolts with built in "ultrasonic" stretch measuing devices and special sockets/attachments for measuring bolt stretch on every joint with every bolt - very trick, Ford use them in some engine applications - maybe a little extreme for mini development. More affordable may be hiring a proper "SPS" torque wrench which senses yield in bolted jointes - still not good for measuing elongation mind.

Sprock - you will be amazed at the lack of knowledge on the subject- I worked with Lotus for nearly 8 years and tried to sort Elise fasteners out on more than one occasion - the manufacturers wipe their hands of any liability as they should, as the end user is responsible for the joint application of the product, I've changed coatings on some fasteners and had to re-validate the joint (rear TCA joint Elise anyone) before it could be implemented due to the huge difference in friction on the threads/mating surfaces - this caused all sorts of crap when surface finish on fasteners went chrome6 free!

one of my last jobs on the chassis systems of the new Lotus Evora at the end of last year was commonising fasteners/grades of bolts and determining torque values and ditching all the f****g washers/ nylocs/ tab washers Lotus used to use!


Back on subect - testing is good but you'll have to break a few parts to determine the correct value, 75-80% of yield torque on high tensile bolts (10.9 grade) is the "correct" stretch - SPS wrench will help here in determining yield point and UTS - lightly coated underhead of bolt and threads produce the most consistent results by keeping friction more consistent.

JK

If Carling made Mini engines
it would probably be like this one!

Are there really any sluminium blocks out there with aluminium caps? I don't think I've seen that.

yes - things like the duratecs have alloy caps (in reality complete one piece alloy caps/gridle in one)

If Carling made Mini engines
it would probably be like this one!

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

From memory i think suzuki swift g13b engines are like this v, and also the charade gtti?

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

rover V8??

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

well that fortech strap defo looks a wate of time, the whole idea was to get rid of the raised lump of the cap and strap it to strength it.

but i can see the idea of the normal strap on high rpm cranks but for normal rpm usages eg most turbo,s then you will proberly be ble to do with out.

i have said for a long time most of our engines are over engineered in some departments as its revs that kills things not over all power and torque generated, except for boxes of course.

my crank is a bog standard one with out any wedging back drilling ect, and is more than up to the job ( touch wood).

as its revs that kills them, and as i only rev to 6500 max then should be fine and has been.

always looking for them bigger bunches of bannanas

is it nesessary to balance a crank after shot peening anyone ?
surely not if material is neither removed or added ..?

Thats up to you, the factory balance is not that clever anyway

not needed, I have checked it personally

Edited by miniminor63 on 23rd Nov, 2008.

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

think so,
pretty sure the flywheel one was at least, been a few years since i looked in an imp lump.

Yes, Imps have all three main bearing caps in aluminium.

And why not ???

It's an alloy block....

EDIT - and doesn't the K series too ??? - albeit a "ladder" assembly rather than individual caps, but I'm sure it's alloy to match the block (stands by to be proved wrong...)

Edited by Rod S on 23rd Nov, 2008.

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

rod. check evo's post a little further up and then look at his sig... hehe

Oooops, didn't spot that....

At least I knew it was a ladder

The Imp is definately three seperate alloy caps though, I've worked on enough of them in my youth :)

UNC retaining bolts straight into the alloy block.

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

I seem to remember skoda's having alluminium caps too.