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#1
11-08-2001, 08:22 PM
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Does anyone know of a web site or book that has the flow numbers for various stock Pontiac heads. In particular I am looking for the numbers for 1968 #16 heads on my 400.
Thanks, Unchained
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Thank you, Don 1963 Lemans 1965 Catalina 2+2 1968 GTO 1969 Lemans OHC6 1972 Formula 1974 GTO 1986 Grand Prix 2+2 1986 Fiero SE 2005 Bonneville GXP |
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#2
11-08-2001, 08:22 PM
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Does anyone know of a web site or book that has the flow numbers for various stock Pontiac heads. In particular I am looking for the numbers for 1968 #16 heads on my 400.
Thanks, Unchained
__________________
Thank you, Don 1963 Lemans 1965 Catalina 2+2 1968 GTO 1969 Lemans OHC6 1972 Formula 1974 GTO 1986 Grand Prix 2+2 1986 Fiero SE 2005 Bonneville GXP |
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#3
11-08-2001, 08:44 PM
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Almost all the D-ports flow within a couple CFM of each other. I would say around 185+- CFM on the intakes.
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#4
11-09-2001, 12:04 AM
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Try the April 1991 issue of HPP.
------------------ Bill
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Bill 64 GTO, tube chassis w/606" IA tall deck, PG & a pro geared Fab 9". 2750 lbs. 8.2550@164.17-1/4, 5.2901@131.97-1/8, 1.1981-60-ft. 8/10/08 
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#5
11-09-2001, 08:28 AM
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heres the site you need....... http://www.pontiacwarriors.com/
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Home of WFO Hyperformance Shaker induction. |
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#6
11-09-2001, 09:37 AM
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Try this link. I think it's the article that WDCreech is talking about:
http://clickit.go2net.com/adclick?ci...eddedexitpopup |
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#7
11-09-2001, 09:43 AM
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Sorry, wrong link......don't know where that came from? Try this one:
http://www.pontiacpower.org/ultimateflow.htm |
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#8
11-09-2001, 11:34 AM
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Keep in mind that these numbers are flowed at 12 in. hg. Is there a reliable conversion factor to 28 in. hg ?
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#9
11-09-2001, 11:43 AM
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The above flowbench tests should be interpretted as a comparison of the heads that were analysed at the time. They were originally tested at 12". Conversion of these figures to 28", & subsequent comparison will have some scratching their heads, wondering "what if" all of the heads tested had been tested in #1 shape.
If your heads are ones that were shown as #2 condition or #3 condition (the '71 HO's) in the above tests... might do as I did, & pay to have several sets of near identical #1 condition heads flowed on a Superflow 600 at 28", you will get a far more accurate result.
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Buzzards gotta eat... same as worms. |
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#10
11-09-2001, 11:46 AM
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76 T/A,
The conversion factor that was used in the "for beginner's" simulated dyno test was 1.2333
__________________
Buzzards gotta eat... same as worms. |
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#11
11-09-2001, 09:41 PM
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Unchained, I flowed a few pair of stock D-ports at 28" on a Superflow 600. The intakes flowed 210 cfm, the exhausts flowed 160 cfm.
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#12
11-10-2001, 12:07 AM
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Thank all of you for the information. I have been able to find the information needed from your responses.
Unchained
__________________
Thank you, Don 1963 Lemans 1965 Catalina 2+2 1968 GTO 1969 Lemans OHC6 1972 Formula 1974 GTO 1986 Grand Prix 2+2 1986 Fiero SE 2005 Bonneville GXP |
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#13
11-11-2001, 12:47 PM
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As they said above that article in HPP is good for comparisons of those heads tested. ven converting their 12" numbers come no where close to any numbers I have even gotten.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#14
11-11-2001, 08:26 PM
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Conversions from 12" HG are inaccurate. If you want useable flow figures, it should be done at 28" HG. That's where a V-8 engine spends most of it's time while actually running- and that's the figure most shops insist on using for the past 20 years.
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