S4 vs S5 housings?
#1
Right near Malloy
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S4 vs S5 housings?
Are there any difference between the housings in either engine?
I know the S5 aluminums have the knock sensor mounting location. But aside from?
I read somewhere that S5 aluminums have the spark plug located slightly higher or lower. (I forget which.) I believe it trades power and efficiency for emissions...
Is there any difference between stock porting? S4 N/A to S5 N/A mainly, but if anyone has S4 Turbo to S5 Turbo, that info could come in handy too.
Thanks.
I know the S5 aluminums have the knock sensor mounting location. But aside from?
I read somewhere that S5 aluminums have the spark plug located slightly higher or lower. (I forget which.) I believe it trades power and efficiency for emissions...
Is there any difference between stock porting? S4 N/A to S5 N/A mainly, but if anyone has S4 Turbo to S5 Turbo, that info could come in handy too.
Thanks.
#3
Right near Malloy
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Originally Posted by 90WhiteVrt
There is a larger oil "catch" or reserve in the S5 housings. It's considered to be better for the motor.