Mazda MX-3 and Mazda MX-6 These two sporty models have become popular cars for import tuners due to the availability of parts, the low price, and the smooth lines.

95 MX-3 1.6 DOHC engine swap to ???

Old 08-27-2018, 09:59 AM
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Join Date: Aug 2018
Location: Waco, GA
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Default 95 MX-3 1.6 DOHC engine swap to ???

I need help please... I have been researching different sites on the best options for doing this swap and have been getting conflicting information. Forgive the length of the request, but I want to get all the information out.
The vehicle is a 1995 MX-3 with the B6-DE 1.6 DOHC 4cyl engine. Vehicle has about 195K and is still running fine. The body and interior are in excellent shape. The vehicle has a 5 speed manual transmission.
What I want is to get some more HP. I am ready to try an engine swap and just want to know my options. I have seen some just go up to the 1.8 BP-ZE and some all the way up to a 2.5? Should a buy a rebuild kit for the one I have and get forged pistons etc. to perhaps introduce a turbo. (the parts seem hard to find and not very cost effective) or just swap to a larger engine. I see some that say this is a straight forward procedure, but others say that there are wiring harness issues galore.
Any advice would be greatly appreciated.
Old 05-30-2019, 12:22 PM
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Join Date: Jul 2018
Location: Knoxville
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Default Engine swap

I have recently Swapped in a 1.8 on my 1995 DOHC, I retained the 1.6 tranny and it was about as close to a ‘bolt in’ as possible, 20 hp gain with some more tuning headroom.. To make it easy, remove distributor & all sensors from 1.6 & run 1.8 same way. Mx3 ECU will adjust
Old 05-30-2019, 12:32 PM
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Location: Knoxville
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Oh ya, FWD 1.8 BP05 motor donors... 1.8 pre ‘98 Kia Sephia, Escort GT, 1.8 Protegé from same era. I used a Kia BP, $350, 27k miles on it. You will need the 1.8 passenger axle assembly, and bolt holes on half axle will need to be bored a little if you keep 1.6 trans. (If you swap tranny too you would need to fab motor mounts. The bolt hole thing will make sense when you put it together.) few days, cheap upgrade! Anything else will require more fabrication.
Old Today, 03:41 PM
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Join Date: Jun 2019
Location: Sinking Spring, PA
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The Escort GT 1.8 engine was rated 127 hp. That's a big jump from the 106 hp rating of the DOHC I4 Mazda engine. I can't imagine how a difference of only 0.2 liters would make such a difference. Does anybody here know what made the Escort GT engine more powerful?
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