Too good to be true? (cheap rods) - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 11-30-2011, 10:52 AM   #21
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I've got some CAT rods off ebay. The small end size that they had listed was incorrect for some reason. I measured both ends and they are factory spec.
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Old 11-30-2011, 11:20 AM   #22
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Whats the thought on rod bolts? are the ARP 8740s good enough if you're aiming for under 400whp or is it worth it to go to the 2000s?
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Old 11-30-2011, 02:18 PM   #23
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From what I read, the 2000's are only needed for over 200hp per cylinder.

I think they'll be fine.
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Old 11-30-2011, 08:48 PM   #24
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That's a deal if they continue to hold up.
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Old 11-30-2011, 09:52 PM   #25
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Quote:
Originally Posted by buffon01 View Post
I believe the 94 motors have 8.8:1. The 95-97 have 9.0:1. Then the 99-00 have 9.5:1. I also recalled reading somewhere that the automatics have lower comp ratio than the manuals. I believe all the comps ratios are manual.
So I need 95-97 pistons then?
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Old 12-03-2011, 01:54 AM   #26
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Quote:
Originally Posted by Braineack View Post
(Sent from phone via capitalism)

There's a low comppression 94 piston iirc. Wasn't published but its know lore that was lowest compression year.
I've had a 94 motor and a 96 motor and the 94 definatly had lower compression pistons. The 94 top had a dish to it and the 96 bumped up. I think the pre obd2 1.8l was 9.0:1

Bob
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Old 12-03-2011, 09:29 AM   #27
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Somewhere in '95 the pistons went from slightly dished to slightly domed. The domed piston has superseded the dished piston from Mazda, so if you order pistons from Mazda Motorsports, you will get the domed piston.
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