[Q] FS-DE to FS-ZE Swap

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SicMSP03.5

Member

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2003.5 Mazdaspeed Protege

• Nov 15, 2014

• #1

So I bought a FS-ZE engine and I stripped the intake and exhaust manifold because I'm going to use my FS-DE ones. I know it has higher compression Pistons and and different intake and exhaust cams but am I able to use my MSP ecu or am I going to have to do some rocket engineer type stuff to get this thing running?


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The_big_dill

• Nov 17, 2014

• #2

The FS-ZE is naturally aspirated. If you put a turbo on there, any region that sees forced induction will not be recognized... So you definitely have to use the MSP ecu, but I do not know if it will recognize the timing pattern. You may have to take the 36-1 timing gear from the FS-DE.

The next problem is that you are running boost in a higher compression engine that wasn't meant to handle boost. Assuming that you will be running at stock 6PSI, its a matter of time before your connecting rod folds and shoots through the side of the engine.

 

S

SicMSP03.5

Member

:

2003.5 Mazdaspeed Protege

• Nov 17, 2014

• #3

Yeah I'm definitely going NA, I was just worried about timing and ecu issues but I should be good. I'll use buy a mp3 ecu and "stock" exhaust components


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T

The_big_dill

• Nov 17, 2014

• #4

SicMSP03.5 said:

Yeah I'm definitely going NA, I was just worried about timing and ecu issues but I should be good. I'll use buy a mp3 ecu and "stock" exhaust components
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If you are going NA, you should use the FS-ZE ECU.

 

S

SicMSP03.5

Member

:

2003.5 Mazdaspeed Protege

• Nov 17, 2014

• #5

I'm sure it has a different harness the one I got has cut wires and stuff from shipper


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H

hornsfan10609

Certified Mazda Tech

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2003.5 Mazdaspeed Protege x2

• Nov 23, 2014

• #6

Just put the turbo on it and run the MSP ecu it will be fine and you won't blow it up if you keep it under 10-11psi. Nothing I would hate more than to see a naturally aspirated MSP.