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Author Topic: M47 crank + custom pistons, rods, etc.  (Read 51164 times)

kowalski

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M47 crank + custom pistons, rods, etc.
« Reply #30 on: April 06, 2006, 03:11:16 AM »
you guys seen the chevy 904? that thing is MASIVE!
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tim_s

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M47 crank + custom pistons, rods, etc.
« Reply #31 on: April 06, 2006, 10:29:44 AM »
Quote from: 2002maniac
Displacement is the cure.


too true. bit of a problem on an m42 though!

anyway febi, how did you get to 2130cc? i'm impressed at that! what CR you running?
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2.1 200bhp, 175ft/lbs 318is
E46 330ci daily

Febi Guibo

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M47 crank + custom pistons, rods, etc.
« Reply #32 on: April 06, 2006, 12:32:58 PM »
Hey, sorry the details on all this are still coming together... I'm still about a month or so away, so here's hoping!

the target compression ratio is about 11.5:1

my figure on the displacement was an estimate, but the crank takes the stroke out to 88mm or so.

re: to fit the M47 crank --needs to be shortened by about .5mm, and a woodruff was cut for the timing gear (in the pic)
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tim_s

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M47 crank + custom pistons, rods, etc.
« Reply #33 on: April 06, 2006, 01:49:29 PM »
Quote from: Febi Guibo
Hey, sorry the details on all this are still coming together... I'm still about a month or so away, so here's hoping!

the target compression ratio is about 11.5:1

my figure on the displacement was an estimate, but the crank takes the stroke out to 88mm or so.

re: to fit the M47 crank --needs to be shortened by about .5mm, and a woodruff was cut for the timing gear (in the pic)

sure, reason i asked was because to get 2130cc with your crank you'd need pistons that would leave very little meat indeed between bores. did you have a regrind on the crank too? the tolerences on mine weren't very good, be intrigued to see how yours is as mine had done very few miles.
what crank bolt did you use btw?
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2.1 200bhp, 175ft/lbs 318is
E46 330ci daily

sheepdog

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M47 crank + custom pistons, rods, etc.
« Reply #34 on: April 06, 2006, 03:56:09 PM »
Very nice!
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Antrieb

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M47 crank + custom pistons, rods, etc.
« Reply #35 on: April 14, 2006, 07:59:59 PM »
Looks like it's going to be great Febi!
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Eurospec

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M47 crank + custom pistons, rods, etc.
« Reply #36 on: April 14, 2006, 08:42:52 PM »
Quote from: Antrieb
Looks like it's going to be great Febi!
A non m42 owner... anyone in favor of a ban??






jkin dude :p Welcome!
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Febi Guibo

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« Reply #37 on: April 14, 2006, 08:54:15 PM »
he can stay...

...as long as he participates in each and every group buy... :D
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kowalski

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« Reply #38 on: April 14, 2006, 09:18:22 PM »
Quote from: Febi Guibo
he can stay...

...as long as he participates in each and every group buy... :D


i say we charge him, how about he has to pay for half of my project:D  how does that sound?
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D. Clay

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Compression.
« Reply #39 on: April 14, 2006, 09:53:46 PM »
I think diesels have like 20:1 compression. That should be bullet proof @11.5:1. I gather the increase in displacement is coming from the stroke. Just curious what the bore and stroke are for a stock 318 and for the build you are doing.
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shellback

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M47 crank + custom pistons, rods, etc.
« Reply #40 on: April 14, 2006, 10:53:31 PM »
Just FYI - I called eurodepot a few days ago. They can get a M47 crank for about $800. Is this the amount we are expecting it will cost?

Chris
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kowalski

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« Reply #41 on: April 14, 2006, 11:00:40 PM »
thats at the stealer ya it will cost that. europe should be cheaper, iv got a part number so i'm gona buy every crank i can with that pn, which will probably be just one..:( but if i find more ill bring'm back
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shellback

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« Reply #42 on: April 20, 2006, 08:22:44 PM »
So, any new updates?
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Febi Guibo

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M47 crank + custom pistons, rods, etc.
« Reply #43 on: April 20, 2006, 08:53:12 PM »
nothing much yet... the head is out being worked, and once that's done, I guess it will be torqued on without the crank in place, and then the cylinders and block will be checked for any signs of warping etc. Thats kind of the last major hurdle for the bottom end.

they had to go to a slightly shorter, lighter I-beam rod instead of the h-beam to get the compression ration down a little... with the h-beam rods, the CR was coming out to around 12.8, which the engine builder wasn't comfortable with; he's kind of using his S50-related experience to figure it out.

On my end, I've been gathering up all the other various parts... stuff that I can deal with when the motor is out...  the starter, power steering pump, belts, plug wires, coils, etc. My coolant and vacuum lines are pretty new and I did the alternator in january...

I'll try to post some more pics shortly...
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nickmpower

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M47 crank + custom pistons, rods, etc.
« Reply #44 on: May 06, 2006, 08:49:25 PM »
hey, what are the specs on the pistons and how much did they run you?
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