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Originally Posted by JRust
I'm pulling the motor saturday morning. I also bought another 13b motor complete from a 88.
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This would be an S4 NA? (6-port)
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Originally Posted by JRust
Of course that was before I knew there are differences in the 13b. So I can't just bolt the new one in place & go.
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I am guessing that the existing engine is a 4 port...
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Originally Posted by JRust
Can someone tell me if there is a benefit to going with the newer motor? Be nice to have Fuel injection.
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Fuel Injection is one advantage, the chrome finish sticks better to the newer housings, so the flaking isn't such a problem.
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Originally Posted by JRust
How much better is the 6 port motor?
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I think by this you mean 'How much worse is the 6-port motor?' - Considerably. The 4 port makes considerably more power in stock trim and has a lot more potential.
Here is a torque curve comparison between the two, the 6-port was completely stock, the 4-port was mildly ported.
