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Re: What pistons and what rods?


mitsuturbo
Banthony
555/1000


Galant VR-4 org Post #: 1197532 posted 12/28/14 07:44 PM     Remind Me!  Send Private Message   Edit Post      
Mahle seems to think the evo has a 47cc head as well. At least that's what's in the catalog. I'll be close enough to 9:1 for me.



92 GVR4 555/1000 11.41 @ 128.26mph
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2012 Hyundai Veloster

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tektic
Senior Member


Galant VR-4 org Post #: 1197548 posted 12/28/14 11:08 PM     Remind Me!  Send Private Message   Edit Post      
I agree that the 1g heads were 47cc also.

I ran the numbers with a calculator
Bore: 85.5mm .02" over
Stroke: 88mm
HG Bore: 86.3mm Mitsubishi MLS
HG Thickness: 1.3 Mitsubishi MLS
Piston Dome: -10cc
Head volume: 43cc / 47cc
------------------------------------
Comp Ratio: 8.82:1 / 9.33:1

Obviously if your head and block have been resurfaced it's higher, and also if your more than .02 over or running over sized valves.

I wish someone brought all that to my attention. Assuming a 47cc head my last engine specs out to 9.58:1. However I have 1mm over valves and both the block and head have been cut.

I'm using a 86mm piston with a -9cc dome and 94mm stroke. I should cc my head before I put it back together.



7 1G DSM's now a GGSX build.


Edited by tektic (12/28/14 11:10 PM)

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362Ryan
Not Newbie
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Galant VR-4 org Post #: 1197565 posted 12/29/14 12:30 PM     Remind Me!  Send Private Message   Edit Post      
Quoting EMX5636:

Quoting 362Ryan:

I'm with Biglady on this one.

I went with Wiseco HD's, tool steel wrist pins and K1 rods.

The machinist said the rods were some of the toughest he has worked with.




Not trying to divert too much off topic, but everything I've seen about K1 is they are the same as Eagle/Scat.




Where did you get that from? Because if you were to ask Tom Molnar, he would tell you that in his 30 plus years of designing rods for Oliver and K1 he hasn't borrowed an idea from them.
Let alone the fact the K1's are billet which to my knowledge is not available in Eagle or Scat.



92 Galant VR4 362/1000

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89Patches
I <3 AMS


Galant VR-4 org Post #: 1197580 posted 12/29/14 04:20 PM     Remind Me!  Send Private Message   Edit Post      
Manley, Eagle, Scat, K1 all get the rod blank's from the same place in China. Only difference is how each company machines them once in they're possession.

Sounds like your machinist is just telling ya what you wanna hear...

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slugsgomoo
god hates stupid people
461/1000


Galant VR-4 org Post #: 1197583 posted 12/29/14 04:58 PM     Remind Me!  Send Private Message   Edit Post      
Quoting 89Patches:

Manley, Eagle, Scat, K1 all get the rod blank's from the same place in China. Only difference is how each company machines them once in they're possession.

Sounds like your machinist is just telling ya what you wanna hear...







-andrew
{witty signature}
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362Ryan
Not Newbie
362/1000


Galant VR-4 org Post #: 1197611 posted 12/29/14 10:27 PM     Remind Me!  Send Private Message   Edit Post   
Quoting 89Patches:

Manley, Eagle, Scat, K1 all get the rod blank's from the same place in China. Only difference is how each company machines them once in they're possession.

Sounds like your machinist is just telling ya what you wanna hear...




Ahh yes. That must be it.



92 Galant VR4 362/1000

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