Re: how much loss with six pack (small block stroker)?
[Re: kielbasa]
#1071947
09/09/11 12:39 PM
09/09/11 12:39 PM
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Joined: Jul 2010
Posts: 2,091 Delray beach, Florida
Performance Only
top fuel
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top fuel
Joined: Jul 2010
Posts: 2,091
Delray beach, Florida
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on a mild build, i think the better question would be how much gain, if done right. if your goal is what you stated, the six pack will easily get you there.
machine shop owner and engine builder
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Re: how much loss with six pack (small block stroker)?
[Re: scatpacktom]
#1071950
09/09/11 02:07 PM
09/09/11 02:07 PM
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Joined: Nov 2004
Posts: 354
kielbasa
OP
enthusiast
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OP
enthusiast
Joined: Nov 2004
Posts: 354
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Quote:
Power loss over what?
i should have specified... a modern 4 barrel
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Re: how much loss with six pack (small block stroker)?
[Re: kielbasa]
#1071955
09/10/11 07:00 PM
09/10/11 07:00 PM
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Joined: Oct 2007
Posts: 4,210 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,210
New York
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Using Vizard's rule ("find the restriction"), as power goes up the limited plenum volume of a 3×2 becomes a problem. At 400 it doesn't matter, at 700 it's fatal. In between...?? More cam, and especially overlap, is also tough because it upsets all the original careful jetting and leaves you playing with your drill set and cursing.
Boffin Emeritus
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Re: how much loss with six pack (small block stroker)?
[Re: kielbasa]
#1071960
09/11/11 08:06 PM
09/11/11 08:06 PM
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Joined: Aug 2003
Posts: 43,292 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,292
Bend,OR USA
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Quote:
Quote:
Power loss over what?
i should have specified... a modern 4 barrel
I dnyo tested my low deck sixpak motor(518 C.I. Pump Gas) with the sixpak and then 30 minutes later a Team G intake and 1050 Dominator, I actually tested three different Holley 1050 Dominators and I had to add a Wilson Manifold 2 inch reversion spacer to get the single, modern, four barrel carb. power close to that old design sixpak on that motor The best dominator on the Wilson reversion spacer made 708 HP and 750 Ft. Lbs and the sixpak made 718 HP and 750 Ft Lbs, same dyno, same day More air with the proper mixture of fuel made more power
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: how much loss with six pack (small block stroker)?
[Re: BEEQUIK]
#1071962
09/12/11 01:19 AM
09/12/11 01:19 AM
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Joined: Dec 2003
Posts: 1,153 Adrian, Mi
pro6pakRR
mopar addict
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mopar addict
Joined: Dec 2003
Posts: 1,153
Adrian, Mi
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Quote:
OK- i know you said smallblock but I think this may help.I had a 69 Superbee and was running a stock style 6-pack. Car was running 12.60's at the time and I had an M-1 single plane intake and a new Holley 750 vac. secondaries carb.Went to the track and made 2 passes with the sixpack.12.60 and 12.61. Switched the intake and carb to the 4 barrell and went 12.61 and 12.61. So in my application I saw no difference. When I installed the new engine it ran a best of 11.60 with the sixpack and didnt put a four barrell on that combo.
Mine was the same went 11.53@117 with 6 pack and 11.58@116 with M1 and 850 Holly.Same day about 15 min.between passes.Just took one intake and carb off put other on.
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