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Heat-treating sucks (because of the wait)

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FatMaserati

Post subject: Heat-treating sucks (because of the wait)

Posted: Thu Apr 14, 2005 5:41 pm

998cc

Joined: Tue Jul 13, 2004 2:27 am
Posts: 712
Location: Inglewood, Perth WA

Let's see now... My crank will have been at the heat-treaters for at least 10 weeks by the time I get it back. 10 weeks.

Man, you have to be patient. I just want my Mini back.

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http://photobucket.com/albums/y64/FatMaserati/

Last edited by FatMaserati on Sun Apr 24, 2005 1:46 pm, edited 1 time in total.

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drmini in aust

Post subject:

Posted: Thu Apr 14, 2005 7:21 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39755
Location: near Baulkham Hills, NSW

Who is the heat treater... is it in WA or elsewhere?
I'm tossing up whether to tuftride my 84.3mm stroker crank, after I wedge it.. I've heard good and bad reports on the process. Jury is still out..

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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J_A_M

Post subject:

Posted: Thu Apr 14, 2005 7:24 pm

1360cc

Joined: Tue Mar 16, 2004 11:32 am
Posts: 9068

10 weeks?

what's their excuse??

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68matic

Post subject:

Posted: Thu Apr 14, 2005 7:51 pm

1275cc

Joined: Tue Mar 16, 2004 9:12 pm
Posts: 5038
Location: cabramatta sydney

can someone explain "wedging"
im sure its been explained somewhere before, i just dont recall what it is

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min13k

Post subject:

Posted: Thu Apr 14, 2005 8:05 pm

I DWIVE A BIG TWUCK

Joined: Tue Mar 16, 2004 5:17 pm
Posts: 8732

it would be were i run up behind you grab ya undies and pull up hard

.... oh hang on thats a "wedgie"
makka

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Anonymous moderation means the agro that is built up towards the mods isn't aimed at an individual (fewer "Makk" attacks). Less stress for mods means less moderator "retirements".

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drmini in aust

Post subject:

Posted: Thu Apr 14, 2005 8:10 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39755
Location: near Baulkham Hills, NSW

68matic wrote:

can someone explain "wedging"
im sure its been explained somewhere before, i just dont recall what it is

No it's not a wedgie... :lol:

On a 1275 crank, the counterweights are not really heavy enough for a good balance factor (OK there's another question.. for next time. :wink:

)
Rather than weld 'em up to increase weight (not a great idea with most cranks) material (ie weight) is removed from the crankwebs, most on the side nearest the crankpin. This makes them look tapered, narrower at the crankpin side. So, relatively heavier at the counterweight opposite.
It also reduces rotating weight of the crank, raising its fundamental resonany frequency so less likely to crack (supposedly). And it will spin up faster....
It's all good. And I own a milling machine...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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lisian_1275

Post subject:

Posted: Thu Apr 14, 2005 8:11 pm

848cc

Joined: Sun Jan 23, 2005 10:15 am
Posts: 116
Location: Wollongong (South of Sydney)

Drmini you can have your crank nitrided. I have all of my race engine cranks either long or short stroke nitrided in sydney. But you will need to balance it first.

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850 Morris Mini
Morris Mini Traveller
Mini sports Sedan

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drmini in aust

Post subject:

Posted: Thu Apr 14, 2005 8:15 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39755
Location: near Baulkham Hills, NSW

lisian_1275 wrote:

Drmini you can have your crank nitrided. I have all of my race engine cranks either long or short stroke nitrided in sydney. But you will need to balance it first.

Can you nitride EN16 cranks (12G1505)? My S cranks (EN40B) are, but I was told (not on here) that nitriding won't work with EN16... :?:

Yes, I would balance it first, after I wedge it. :wink:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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lisian_1275

Post subject:

Posted: Thu Apr 14, 2005 8:22 pm

848cc

Joined: Sun Jan 23, 2005 10:15 am
Posts: 116
Location: Wollongong (South of Sydney)

Yes you can. Nitriding has come a long way in the last few years.
cheers

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850 Morris Mini
Morris Mini Traveller
Mini sports Sedan

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lisian_1275

Post subject:

Posted: Thu Apr 14, 2005 8:24 pm

848cc

Joined: Sun Jan 23, 2005 10:15 am
Posts: 116
Location: Wollongong (South of Sydney)

Also like what you have done with those honda brake conversions. Would like to have a better look at some one day.

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850 Morris Mini
Morris Mini Traveller
Mini sports Sedan

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drmini in aust

Post subject:

Posted: Thu Apr 14, 2005 8:37 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39755
Location: near Baulkham Hills, NSW

lisian_1275 wrote:

Yes you can. Nitriding has come a long way in the last few years.
cheers

OK... I'm interested- who and where??

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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68matic

Post subject:

Posted: Thu Apr 14, 2005 8:50 pm

1275cc

Joined: Tue Mar 16, 2004 9:12 pm
Posts: 5038
Location: cabramatta sydney

1) thanks doc, i understood all of it

2) is nitriding diffusing Nitrogen into the metal (like Case Hardening)
byt heating up and pumping with Nitrogen gas?
(that was my stab)

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drmini in aust

Post subject:

Posted: Thu Apr 14, 2005 8:52 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39755
Location: near Baulkham Hills, NSW

68matic wrote:

2) is nitriding diffusing Nitrogen into the metal (like Case Hardening)
byt heating up and pumping with Nitrogen gas?
(that was my stab)

When I did metallurgy (eons ago..) yes.
But the depth is pretty shallow. Bloody hard, though!

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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lisian_1275

Post subject:

Posted: Thu Apr 14, 2005 8:59 pm

848cc

Joined: Sun Jan 23, 2005 10:15 am
Posts: 116
Location: Wollongong (South of Sydney)

I think they are called St George Heat treatment? I will find my paper work and send you a post. May take over the weekend before i find it, if thats ok.

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850 Morris Mini
Morris Mini Traveller
Mini sports Sedan

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drmini in aust

Post subject:

Posted: Thu Apr 14, 2005 9:03 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39755
Location: near Baulkham Hills, NSW

lisian_1275 wrote:

I think they are called St George Heat treatment? I will find my paper work and send you a post. May take over the weekend before i find it, if thats ok.

No problem.
My crank was stroked by Spiro, at St George Crankshafts, maybe related.. :?:

he's just around the corner where I work.. :lol:

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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