Re: What do your heads flow?
[Re: bwhackd34]
#1259366
07/17/12 04:31 PM
07/17/12 04:31 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Not to get into this due to you guys are smarter than me when it comes to heads but are you figuring in the overlap of the cam which is drawing air/fuel through the cyl to help keep the velocity up
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Re: What do your heads flow?
[Re: moderncylinder]
#1259369
07/17/12 05:12 PM
07/17/12 05:12 PM
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Joined: Feb 2009
Posts: 1,019 Finland
mafo
super stock
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super stock
Joined: Feb 2009
Posts: 1,019
Finland
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I don t think they ever used w9 s on pro stock trucks, w8 and p5 s I have some early nickens w8 s , they flowed 410- 412 on my bench , my CFE s flowed 402 -403 on the same bench
-65 Valiant,420", all motor,2700#, dot tires, 8,42 @ 160,2
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Re: What do your heads flow?
[Re: bwhackd34]
#1259375
07/17/12 05:56 PM
07/17/12 05:56 PM
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Joined: Oct 2004
Posts: 1,752 detroit area
moderncylinder
top fuel
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top fuel
Joined: Oct 2004
Posts: 1,752
detroit area
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Quote:
Two cylinder heads, all else equal, the smaller MCA(and we are talking within reason...not to any extremes like a 2")should, according to the definition you stated earlier, make more power...
this is based on your conclusion on how velocity operates in a port,, maybe based on you thinking its like a flow bench and the port is "on",, not in a running engine that has "velocity" of the charge as dictated by the piston speed/depression created in the intake stroke,, there is no vaccum in the compression stroke to generate velocity,, it is created by the residual charge in the port upon sweeping the intake stroke,, which we call inertia,, which impacts the cylinder as the piston is comming up,, the smaller the window it has to flow through,, the less of an impact it has AT HIGHER SPEEDS
a side note,, in drag racing,, "we" try to make power at higher speeds,, to get down a 1/4 mile track faster and quicker
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Re: What do your heads flow?
[Re: bwhackd34]
#1259379
07/17/12 06:43 PM
07/17/12 06:43 PM
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Joined: Oct 2004
Posts: 1,752 detroit area
moderncylinder
top fuel
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top fuel
Joined: Oct 2004
Posts: 1,752
detroit area
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with a w-9 head it is impossible to get 470cfm through a 2.8-3.0 minimum cross section,, it just isnt big enough,, period,, im tired of this stupidity,, nobody on the planet in comp, pro stock, nascar, or whatever has even came close to that number,, but i guess you figured it out
show me the timeslip? that sums it up? mr bwacked,, what have you worked on that has made 2.2 or more hp/cubic inch? for real
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