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Old 06-04-2008, 08:06 PM   #1
Rotary_Rocket_87
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motor differences

I have been searching for a while on this one. Every thread that I have read that mentions the differences of S4 and S5 engines only state that the intakes are different and if it has EGR it is S4. The only thing I have found to help determine which series a shortblock is that the spark plugs aren't located the same on S4 and S5 rotor housings. Mazda moved them on the S5, but I can't find an info on how they moved them (measurements). Does anyone have anything else?
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'87 TII- full emissions removal, a/c removed, FPD removed, dual 12" e-fans, Rotary Performance FCD, ACT unsprung 6 puck w/ Xtreme PP, custom open 2.5 inch exhaust, custom clutch pivot ball, K&N cone filter, TB mod, RB downpipe, motor blown 8/7/09



'94 Mazda B4000- POS beater truck, stock

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