3rd gen Engine/Drivetrain Engine/Drivetrain Modification Discussions for 1999-2003 Models Only (BJ chassis)

Compression Ratio ???

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Old January-22nd-2002 | 12:27 AM
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Compression Ratio ???

how can we make our protege5 with higher Compression Ratio
Old January-22nd-2002 | 05:28 AM
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Higher Compression Piston Set

You need to get high compression pistons or shave the head. hehe. I'd get the pistons. Or you might just want to get a turbo and keep the low compression.

Rishie
Old January-22nd-2002 | 12:39 PM
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You could always pull the head and have it decked to reduce the camber cc, and while its off have it ported and extrude honed. It would also be a good time to revalve with larger dia valves too.
Old January-26th-2002 | 11:36 PM
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In this case, the simple answer is the best. FS-ZE pistons bump compression to 10.5:1, MazdaSpeed pistons to 10.7:1.
Old January-27th-2002 | 02:45 AM
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thank u guys....

does the it gain any hp?????
Old January-27th-2002 | 07:50 PM
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Going from the stock 9.1:1 compression ratio to 10.5:1 should provide a nice boost in HP.
Old March-4th-2002 | 02:23 PM
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Originally posted by Eric F
Going from the stock 9.1:1 compression ratio to 10.5:1 should provide a nice boost in HP.
What type of gain?
Old March-4th-2002 | 03:20 PM
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..and how much would it cost to have these installed?
Old March-4th-2002 | 03:46 PM
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Question Compression

What is the compression of the MP3 Pistoles????
Old March-5th-2002 | 03:35 PM
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Re: Compression

9.1:1, same as all FP/FS protege engines.



Originally posted by mkdxxx
What is the compression of the MP3 Pistoles????
Old March-5th-2002 | 07:48 PM
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Question What?!?

I thought that the MP3 had the higher compression pistons and the different cams???
Old March-5th-2002 | 09:23 PM
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Re: What?!?

Originally posted by mkdxxx
I thought that the MP3 had the higher compression pistons and the different cams???
Nope...They don't.
Old March-5th-2002 | 11:51 PM
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?

So if the mP3's don't have the higher compression how do they get the power out of it.
Old March-6th-2002 | 01:10 AM
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Actually, I have but I don't ever remember seeing that the pistons are the same. Must have overlooked.
Old March-6th-2002 | 09:44 AM
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Jesus Christ $1000 to void my warranty, ehhh I guess I won't be putting those pistons in anytime soon. Just bolts on for me baby.



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