Layshaft hardness tests ?? ??
Turbo Mini Forums

Layshaft hardness tests ?? ??

Now layshafts have given me big head aches in the past, (and others to I'm sure)

Now I normally use mini spares high grade ones, they still wear but they don't have any in stock this year, but there are selling a "genuine rover" ones, we no it's not "genuine" but it's made to the same spec as the good old standard ones.

Anyway speaking to TD, he suggested they might be able to have some hardness tests on them. Tom Fenton your name was spoken about

would be good to test an old high grade one compared to a "Standard" rover one and the latest one MS sell.

Any thoughts on this would be good, it might benefit us all!

MW

Edited by Miniwilliams on 22nd Dec, 2005.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

If you can get me a sample of each layshaft then I should be able to get a brinell hardness test done on them.

I can't 100% guarantee being able to get this done, but I can certainly have a go.

thats a very good idea Matt ,


carl

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

it was TD idea really , can't take all the credit, but you know i have been thinking about them

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

sounds good Tom cheers, if i sent you a new one would you be able, if you could get it tested that is, would you be able to test the area near the bearing, so i could have the new layshaft back to use again if we like the tests?

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

Can certainly try, let me know when you have the layshafts to test and I will see what I can organise.

I've got full access to a Rockwell tester if it's needed.

Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.

when ever really and sooner the better as i want to get on with the build.

I can send some out asap. but i guess maybe after christmas would be best for you.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

I will have to have it done at work, with Christmas shutdown looming, I am realistically not going to be able to get them done until at least mid January.........

If you can wait till then, then no problem, otherwise maybe Karl can oblige?
(Although Rockwell testing if I remember correctly can only be done on a flat surface so would render any test pieces scrap for future use?)

Which parts are wearing,I maybe back on nights soon so Tungston carbide coated and diamond ground shaft available if it's o/d's


http://www.turbominis.co.uk/forums/index.php?p=vt&tid=6359

Edited by Dangerous on 19th Dec, 2005.

Metro turbo weekend driver,Mini turbo in the making again!

When I'm back at uni in January I will be able to do it if nessasary...

Oh, please include mainshafts as well, as it seems as the A+ (factory fitted) ones are made of chocolate. The A ones seems so much better wearing...

I've never had a mainshaft problem Vegard? Same one i've used since my mini was a turbo - been through standard, quaife, and the current gearset (with rebuilds) but still the original mainshaft from the 1987 turbo that gave it's bits and bobs to my project...


Maybe i got lucky?

i used a good used item when i built my box up, the competition one i got wasnt hardened :(

I've seen the future and tbh its Pie

thanks for all the offers, we'll get christmas out the way then we can sort some thing.

Dave i know what Vegard is on about, i had problems wih the bearing wearing on the main shaft, but since having an A+ shaft things seem much better as the bearings are as i'm sure you know, quite a bit bigger.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

You just said the exact opposite to what Vegard said! ? ! ? ! ? ! ? ! ?

O yes Dave so i have lol.

Good point Vegard something to think about to is, if it's bigger the bearing is going to be spinning slower, there for helpping slow up the wear, it's only my findings that the bigger ones seem to wear less for me.

MW

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

Metro turbo weekend driver,Mini turbo in the making again!

fear point, but if you fit 7" wheels on your mini and then you fit 13" wheels on and drive it at the same speeds as each other, then which wheel will be turning slower, the bigger one.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

If you put a larger bearing on something using the simplistic analogy a few of you are trying to adopt, bearings just wouldn't work!

A larger bearing will always have a greater load carrying capacity than an equivalent type smaller bearing. Speed ratings of 'equivalent type' bearings also reduce as they increase in size - this is simply because the roller travells a greater distance due to the larger effective diameter of the races it contacts.

as TD says its basicaly a large suface area for it to run on,

after changing willies from a a seies main shaft to a a+ one we have never had a problem yet.

nose bearing wear is vastly accerlarted by first motion shaft failure or exessive wear

always looking for them bigger bunches of bannanas

Cheers chaps, that make more sence, bigger is better in this case then.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

If your interested i have run a MS competion pre A+ for 61/2 years. Touch wood ive had no problems. Its had an aweful lot of shit thrown at it with 150 hp plus flat gearshifts at 8-9000 revs. I am going to take it out and check it in january. I havent tried an A+ type.
Paul

I seriously doubt it!