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#1 |
Senior Member
Join Date: Dec 2001
Location: Redding,CA...USA
Posts: 4,736
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new #186 flow numbers
Didn't think the dd2000 numbers for #186 heads sounded right..I did a search and found a shop that had these numbers...
"Here are some numbers from an unported set with 1.940" / 1.500" valves IN / EX .200 - 134 / 103 .300 - 182 / 122 .400 - 197 / 128 .500 - 203 / 132 .600 - 204 / 135 A simple bowl port with the 2.02" valve would up the numbers by 10%. Hope this helps. Mike Stark-CFM" these sound a little more real world Jim
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#2 |
Registered User
Join Date: Sep 2001
Location: central Ill. USA
Posts: 447
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Thanx Jim. I'd loke to add that the bigger valves in factory heads need to be unshrouded at least 1/16", esp. the intake, or they produce no flow gains.
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69 C10 longbed: 357c.i. /TH400/3.73s/AC/ beige primer/saving $ for paint ______________________________ |
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#3 |
Registered User
Join Date: Jun 2001
Location: KINGWOOD TEXAS
Posts: 515
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That's great Jim. I have some serious doubt about the flow numbers and results from my DD2000. It's nice to see some real world proof, I was beginning to wonder??????
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