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1974 rx4 will a rx8 motor and transmission fit

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Old 08-25-21, 12:37 AM
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1974 rx4 will a rx8 motor and transmission fit

I found a 1974 Rx4 for sale with no motor and transmission. Wanted to keep now if if a rx8 motor and transmission 6 speed would fit? I am think this might be a good option since it do not need to be smog and the motors seem to be cheaper and easier to find.
Old 08-25-21, 11:29 AM
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Yeah but it's probably more trouble than it's worth. You'll have an easier and cheaper journey with a traditional 13b setup. Ultimately, the outcome is kindof a wash.
Old 08-27-21, 06:49 PM
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Also the throttle body is "Drive by wire" which seems like a major hassle to deal with. It would need a custom transmission mount, the rx8 and FD3S chassis do not use a traditional mount like the ones found in 1991 and older rotary chassis. Sweet car though! I would hold onto it or sell it to me
Old 08-27-21, 07:44 PM
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If it were me I'd restomod the 4 and have full control of the Renesis (if I were inclined to go Renesis in the first place) however, and it pains me to do this, you could always just downgrade to a carb and simple ignition computer or run a FuelTech for ignition control and still run the carb. Racing Beat has adapter plates.
Old 09-01-21, 12:37 AM
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Originally Posted by dguy
If it were me I'd restomod the 4 and have full control of the Renesis (if I were inclined to go Renesis in the first place) however, and it pains me to do this, you could always just downgrade to a carb and simple ignition computer or run a FuelTech for ignition control and still run the carb. Racing Beat has adapter plates.
I going this weekend to buy it. I will keep ever one posted.
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