Compression difference between AT/MT? - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 10-26-2007, 09:59 AM   #21
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well since the a/t 1.6 is so disirable ill trade mine straight up for a 1.8......anybody?
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Old 10-26-2007, 12:32 PM   #22
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Quote:
Originally Posted by ApexOnYou View Post
Honestly dont know why the compression would be lower.. I would assume it would be to lower power output for longer life out of the AT.. But thats an un-educated guess lol. Its looking like that AT spare engine is identical to my current.. Ill check the cam casting numbers between the two this weekend, just out of curiosity to see if the cams are different like on the B6 engines.
So you're goign to swap from a 1.8 to a 1.6? IIRC, there are no differences in comp. on 1.8L motors (BP) as stated above.

If you're in a search for more/safer airflow, buy a 99 head?
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Old 10-26-2007, 01:31 PM   #23
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Originally Posted by neogenesis2004 View Post
please buy wiseco pistons, your grandmother will thank you. http://www.raceeng.com/searchadv.asp...x=0&submit.y=0
best price and they stock them so you'll get them in less than a week instead of waiting a month.
what's so bad about the supertechs?
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Old 10-26-2007, 01:54 PM   #24
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Nothing is bad about them, don't get your panties in a bunch I know you bought them.
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Old 10-26-2007, 01:54 PM   #25
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Nothing is bad about them, don't get your panties in a bunch I know you bought them.
I went back and forth with this...I'd hate to put something in that motor that has a bad reputation. I saw praise for the pistons from the subaru crew.
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Old 10-26-2007, 03:32 PM   #26
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Sorry, it seems I have gotten the wrong idea across lol. To clarify more:

I have a 1.8L in currently, the Miata is of course MT. I also have a 1.8L spare engine out of a AT 94 Miata, they are both BPs, I didnt mean to swap a AT B6 in, I was just trying to figure out if my spare BP which came out of a AT Miata had different cams or pistions.

DropTopDrifter, I do want to eventually get a 99 head, just not quite yet. I still have no EMS or forged goodies haha.
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Old 10-26-2007, 03:44 PM   #27
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I went back and forth with this...I'd hate to put something in that motor that has a bad reputation. I saw praise for the pistons from the subaru crew.
They will be fine.
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