2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Stock port size, 6~versus~4

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Old Sep 30, 2005 | 04:58 PM
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gerbraldy's Avatar
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wtf's a piston
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From: Englewood, FL
Stock port size, 6~versus~4

Which engine has bigger porting stock for stock, a 6port or a 4port(s4 or s5)?
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Old Sep 30, 2005 | 05:33 PM
  #2  
I wish I was driving!
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From: BC, Canada
Originally Posted by gerbraldy
Which engine has bigger porting stock for stock, a 6port or a 4port(s4 or s5)?
6 port has longer duration.
Both connected to their LIM's, my flowbench says the 4 port flows more.
My power experiences with similarly built 4 port engines vs. N/A engines gives similar results.
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Old Sep 30, 2005 | 07:00 PM
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BlaCkPlaGUE's Avatar
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From: calgary alberta
I thought that 4 port engines only flow more if they are ported?
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Old Oct 1, 2005 | 09:47 AM
  #4  
gerbraldy's Avatar
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wtf's a piston
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From: Englewood, FL
Originally Posted by BlaCkPlaGUE
I thought that 4 port engines only flow more if they are ported?
That was my understanding aswell, hence why I posted this thread. I'd love to get some solid info for this question.
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