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Old 02-27-2011, 09:35 PM   #41
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Quote:
Originally Posted by Joe Perez View Post
That's how they did it at the factory when the engine was originally manufactured.


I don't believe I've ever seen an off-the-shelf piston larger than 79.5mm for the 1.6l engine, though either Wiseco or JE will custom-manufacture a piston to damn near any spec you could want.

I guess the big question would be why? Good 1.8l blocks are a dime a dozen, and there are plenty of lower-than-stock-CR pistons available for them.
Toda and Mahle both make a 81mm piston.
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Old 02-27-2011, 09:38 PM   #42
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And if this guy made as much power as he did with ARIAS 81.5MM pistons and a ton of Miata tuners in Japan run them... they are fine.

http://forum.miata.net/vb/showthread...ighlight=arias

Quote:
Originally Posted by Motorworx View Post
TODA Racing in Japan doesn't even sell a piston for the B6 under 81mm. I cut several blocks in half, many years ago, to check cylinder wall thickness, and there's a lot there. I go as large as 81.5 and have never has a cylinder wall problem, even through 9,000 rpm.
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Old 02-27-2011, 09:38 PM   #43
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Yes, all motor.

EDIT: That guy is a dumb ***
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Old 02-28-2011, 12:41 AM   #44
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hayabusa uses 81mm pistons and 20mm pin diameter, no idea on compression height yet
edit
.984 CH
forged factory oem

Last edited by Techsalvager; 03-10-2011 at 05:09 PM.
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Old 02-28-2011, 01:45 AM   #45
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Quote:
Originally Posted by Techsalvager View Post
I don't want to spend 3k on custom pistons
You do know that Weisco/CP/JE will make you whatever you want for $600 right? Tell them you want a B6 Miata piston in an 89mm bore size and they'll make it for you.

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Originally Posted by Techsalvager View Post
I don't feel llike getting a 1.8l, why stop there, there is other inlien 4\6\v6\v8s I could look at that could probably hold together better than the 1.8. Where does it stop?
Because a 1.8 will literally bolt into the chassis you have now with zero fabrication work, whereas any other motor (including the somewhat-popular FE3 swap) requires custom motor mounts at a bare minimum.

Just out of curiosity:
-What is the wall thickness of a stock 1.6 motor? (Not the difference between cylinders, the actual wall thickness as measured by cutting a block in half or sonic-testing)
-What do you think the safe limit of the thickness of a 1.6 block is, and where would that be measured? You do realize that at least some of these motors will likely have casting shift that produces a .030-.040" variance from top to bottom in the cylinder?
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Old 02-28-2011, 02:19 AM   #46
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Quote:
Originally Posted by Savington View Post
Just out of curiosity:
-What is the wall thickness of a stock 1.6 motor? (Not the difference between cylinders, the actual wall thickness as measured by cutting a block in half or sonic-testing)
-What do you think the safe limit of the thickness of a 1.6 block is, and where would that be measured? You do realize that at least some of these motors will likely have casting shift that produces a .030-.040" variance from top to bottom in the cylinder?
Wall thickness varies, but smallest is around .240in\6.09mm which iirc was the front of cylinder 1 due to it being flattened there for the water pump. Otherwise it seem around.320in and I'll have to check again but I believe the cylinders are siamesed. Checked with sonic testing

the other parts I'm not sure on like the safe limit,

Last edited by Techsalvager; 02-28-2011 at 02:46 AM.
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Old 02-28-2011, 03:34 AM   #47
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I'd discuss that safe limit with someone more extensively before blindly following someone down such an aggressive path. If there's really a quarter inch of available wall thickness, slugging it out .140" shouldn't be a problem - having said that, I would urge you to have YOUR block thoroughly sonic-checked for thickness. The last thing you want to do is put $3-4k into a shortblock like this and end up with a cracked/deformed wall.
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Old 02-28-2011, 11:42 AM   #48
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Mitsubishi 4G93 SOHC/DOHC 16V
pistons 81mm stock bore, 19mm pin diameter, CH 1.191in
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Old 02-28-2011, 03:52 PM   #49
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Dude I already gave you the piston that works. 4age 81.5mm and it will work with stock rods.
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Old 02-28-2011, 06:04 PM   #50
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Thanks of course

I'm looking into all possibile pistons around 80-81.5mm.

I'm trying to find an oem solution first.
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Old 02-28-2011, 06:51 PM   #51
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I'm trying to find an oem solution first.

Why?
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Old 02-28-2011, 10:26 PM   #52
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updated hayabusa post info
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Old 03-01-2011, 12:53 AM   #53
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Quote:
Originally Posted by Savington View Post
Why?
Because ARIAS does not make a good enough piston for him. He likes OEM cast pistons for his high boost applications.




And you realize you can use an OEM 4AGE piston if you want too, right? I was just stating the ARIAS pistons because they are the obvious better choice.
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Old 03-10-2011, 04:36 PM   #54
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Quote:
Originally Posted by Techsalvager View Post
I'm looking into all possibile pistons around 80-81.5mm.
So you're dead set on running an OEM piston that was designed for a non-Mazda engine...

Wanna know where you can find a listing of pretty much every common piston in the world, sorted by size?

In a ******* piston catalog.



http://www.supertechperformance.com/...php?id_categ=4
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Old 03-10-2011, 04:59 PM   #55
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thanks, I've been looking though various piston creators catalogs
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Old 03-10-2011, 05:17 PM   #56
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Techsalvager, if you were my kid, I’d un-make you for being such a retard.

I’d do it at night, under the cover of darkness, with no one but the alligators to bear witness. Your body would never be found, for there would be nothing to find. Carefully butchered into chunks no larger than my hand, you would simply pass through the tremendous digestive system of the great lizards, and emerge from the other end as a soft, semi-gelatinous mass devoid of recognizable bones, teeth, or any other identifiable parts.

The next day at breakfast, as I sat hungrily devouring a stack of buckwheat pancakes, your mother would turn to me and say “Honey, have you seen our son this morning?”

At that moment, I would take her. Right there on the kitchen table before the open window, I would thrust myself deeply into her, ignoring the prying eyes of our neighbors and the barking of the dogs as plates and utensils rain down from the table like Triple-A shrapnel over Dresden. Each time I exploded into her, I would pause to allow her a moment’s recomposure before beginning my tremendous assault anew with redoubled ferocity. Despite her screams and wailing, my back and shoulders raw as hamburger torn by her fingernails, I would not falter but continue to have my way like an unstoppable machine fueled by hate and lust.

Finally, after three or four hours, I would at last withdraw, not because I am exhausted, but because it is clear that she finally can stand no more of this assault and live. As the dogs lapped up our sweat and bodily fluids, I would look deeply into your mother’s bloodshot eyes as she wept with joy and ecstasy, and say “Those were some damn fine pancakes.”
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Old 03-10-2011, 05:27 PM   #57
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Quote:
Originally Posted by Joe Perez View Post
Techsalvager, if you were my kid, I’d un-make you for being such a retard.

I’d do it at night, under the cover of darkness, with no one but the alligators to bear witness. Your body would never be found, for there would be nothing to find. Carefully butchered into chunks no larger than my hand, you would simply pass through the tremendous digestive system of the great lizards, and emerge from the other end as a soft, semi-gelatinous mass devoid of recognizable bones, teeth, or any other identifiable parts.

The next day at breakfast, as I sat hungrily devouring a stack of buckwheat pancakes, your mother would turn to me and say “Honey, have you seen our son this morning?”

At that moment, I would take her. Right there on the kitchen table before the open window, I would thrust myself deeply into her, ignoring the prying eyes of our neighbors and the barking of the dogs as plates and utensils rain down from the table like Triple-A shrapnel over Dresden. Each time I exploded into her, I would pause to allow her a moment’s recomposure before beginning my tremendous assault anew with redoubled ferocity. Despite her screams and wailing, my back and shoulders raw as hamburger torn by her fingernails, I would not falter but continue to have my way like an unstoppable machine fueled by hate and lust.

Finally, after three or four hours, I would at last withdraw, not because I am exhausted, but because it is clear that she finally can stand no more of this assault and live. As the dogs lapped up our sweat and bodily fluids, I would look deeply into your mother’s bloodshot eyes as she wept with joy and ecstasy, and say “Those were some damn fine pancakes.”


A single tear of joy just crept down my cheek.
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Old 03-10-2011, 05:47 PM   #58
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yep, joe's definitely drinkin and taking prescription meds again.
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Old 03-11-2011, 01:11 AM   #59
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That was great joe thank you
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Old 03-11-2011, 01:36 AM   #60
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Quote:
Originally Posted by Joe Perez View Post
Techsalvager, if you were my kid, I’d un-make you for being such a retard.

I’d do it at night, under the cover of darkness, with no one but the alligators to bear witness. Your body would never be found, for there would be nothing to find. Carefully butchered into chunks no larger than my hand, you would simply pass through the tremendous digestive system of the great lizards, and emerge from the other end as a soft, semi-gelatinous mass devoid of recognizable bones, teeth, or any other identifiable parts.

The next day at breakfast, as I sat hungrily devouring a stack of buckwheat pancakes, your mother would turn to me and say “Honey, have you seen our son this morning?”

At that moment, I would take her. Right there on the kitchen table before the open window, I would thrust myself deeply into her, ignoring the prying eyes of our neighbors and the barking of the dogs as plates and utensils rain down from the table like Triple-A shrapnel over Dresden. Each time I exploded into her, I would pause to allow her a moment’s recomposure before beginning my tremendous assault anew with redoubled ferocity. Despite her screams and wailing, my back and shoulders raw as hamburger torn by her fingernails, I would not falter but continue to have my way like an unstoppable machine fueled by hate and lust.

Finally, after three or four hours, I would at last withdraw, not because I am exhausted, but because it is clear that she finally can stand no more of this assault and live. As the dogs lapped up our sweat and bodily fluids, I would look deeply into your mother’s bloodshot eyes as she wept with joy and ecstasy, and say “Those were some damn fine pancakes.”
Epic, purely epic.
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