choosing heads intake runner size? - Page 3 - Forums at Modded Mustangs
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post #41 of 149 Old September 29th, 2009, 11:54 AM
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On a V8 maximum possible power production (NA) is going to be roughly 2 hp per CFM flow. This is naturally aspirated. Forced induction is obviously going to be different.
I think your confused with CI .
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As for velocity, here is a real world example. I swapped out 275 cc 4V cleveland heads that flowed 340 cfm for 225 cc aluminum heads that flow about 320 cfm and picked up about 10 mph in the quarter.
So did you test with all the same variables except the head correct?

You have yet to answer my questions about RPM.....What rpm are you making the power at?

250 cfm with a 302 your going to make 500 hp?
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To achieve maximum average hp, you need to use the minimum runner cross section that will support the flow you need up top. Go look at some of the engine masters motors and the tiny runners they use...
Maybe you missed my perfect examples.

Flow is just one aspect of heads. What about acsa. Thats more important.

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Air flow makes power not displacement, even the most basic of engine builders knows that.
Then why are those idiots out there building stoker motors....Silly them... Every one should run a 255.

Like I said again and again its a combination of parts...

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post #42 of 149 Old September 29th, 2009, 12:02 PM
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Originally Posted by econobarn View Post
Not really, it's data taken from...data. So...AFR sucks I guess...they lied about all the info on that page...

Building impressive engines? More like...throwing boost at shit and acting like billy bad ass engine builder who can't accept new information because he's a domestic ricer fairy clown who, again, is stuck with old myths and magazine articles. Hooray!
It doesn't even have axis labels... let alone numbers on the x axis

My 88 isn't boosted and took second place and the Anderson Ford Motorsports dyno shootout.... lost by 9 hp to a motor with 70 more cubes of displacement. What have you ever achieved in your cum fart of a life?

Know Your role.

88 GT CHI headed 351w 10.8 @ 125 - still figuring it out.
03 Cobra 2.3 whipple 10.7 @ 129 - sold it
04 Mach 1 12.7 @ 109 mostly stock - sold it
89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

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post #43 of 149 Old September 29th, 2009, 12:04 PM
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Originally Posted by ryans88gt View Post
It doesn't even have axis labels... let alone numbers on the x axis
That info was taken from:

Air Flow Research Cylinder Heads

I'll post it one more time in case you missed that one too...

Air Flow Research Cylinder Heads

What have I achieved? I'll tell you what I have archived...I ran a blazing 17.1@81MPH...I don't even think you can comprehend those numbers...KING KONG AINT GOT NOTHIN' ON ME.
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post #44 of 149 Old September 29th, 2009, 12:09 PM
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Originally Posted by 93mustank View Post

Then why are those idiots out there building stoker motors....Silly them... Every one should run a 255.

Like I said again and again its a combination of parts...
Ur questions show your ignorance.

Yeah, you can make the same power with a 255 as with a 408 using heads of the same flow potential. Obviously to pump the same amount of air the 255 is going to have to run nearly double the rpms.

People build stroker motors because they are scared of the price tag it takes to spin a domestic V8 on the far side of 7000 rpms.

88 GT CHI headed 351w 10.8 @ 125 - still figuring it out.
03 Cobra 2.3 whipple 10.7 @ 129 - sold it
04 Mach 1 12.7 @ 109 mostly stock - sold it
89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

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post #45 of 149 Old September 29th, 2009, 12:10 PM
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Originally Posted by econobarn View Post

I'll post it one more time in case you missed that one too...

Air Flow Research Cylinder Heads
WOW, so you can copy and paste info from the internet. Awesome.

88 GT CHI headed 351w 10.8 @ 125 - still figuring it out.
03 Cobra 2.3 whipple 10.7 @ 129 - sold it
04 Mach 1 12.7 @ 109 mostly stock - sold it
89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

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post #46 of 149 Old September 29th, 2009, 12:13 PM
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WOW, so you can copy and paste info from the internet. Awesome.
...isn't that just what you did a few posts ago too? POT CALLING KETTLE BLACK? I THINK SO!!!!!!!!!!!!
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post #47 of 149 Old September 29th, 2009, 12:15 PM
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Originally Posted by econobarn View Post
stuck with old myths and magazine articles. Hooray!
Looks like you missed the irony

The Kettle calling the POT out on calling the kettle black is more like it.

Only in this case, the kettle actually knows what he is talking about and the pot is you.

88 GT CHI headed 351w 10.8 @ 125 - still figuring it out.
03 Cobra 2.3 whipple 10.7 @ 129 - sold it
04 Mach 1 12.7 @ 109 mostly stock - sold it
89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

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post #48 of 149 Old September 29th, 2009, 12:17 PM
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Looks like you missed the irony
I didn't post a magazine article, I posted data...you posted an article from Popular Hot Rodding that, if you actually read it proves your theory wrong in several places and really doesn't back up your theory...other than that graph...from a magazine article.
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post #49 of 149 Old September 29th, 2009, 12:28 PM
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My 88 isn't boosted and took second place and the Anderson Ford Motorsports dyno shootout.... lost by 9 hp to a motor with 70 more cubes of displacement. What have you ever achieved in your cum fart of a life?
So you make a Boosted dyno queen and your setting the world on fire....???

We all know The track never lies...Well I guess for your car you hope it does...88 GT 11.4 @ 118

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post #50 of 149 Old September 29th, 2009, 12:49 PM
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Then go to thsi link

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post #51 of 149 Old September 29th, 2009, 01:29 PM
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Originally Posted by 93mustank View Post
So you make a Boosted dyno queen and your setting the world on fire....???

We all know The track never lies...Well I guess for your car you hope it does...88 GT 11.4 @ 118
Those numbers are from before you were even a member on this forum...lol... I don't own a boosted fox, I own a CHI headed solid roller 359 cube small block. Get with the program.

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I've been a member on there for longer than you, dumbass...

Woody and Jay are not the end all be all of small blocks, you silly little nut swinger.

88 GT CHI headed 351w 10.8 @ 125 - still figuring it out.
03 Cobra 2.3 whipple 10.7 @ 129 - sold it
04 Mach 1 12.7 @ 109 mostly stock - sold it
89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

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post #52 of 149 Old September 29th, 2009, 01:34 PM
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Originally Posted by econobarn View Post
I didn't post a magazine article, I posted data...you posted an article from Popular Hot Rodding that, if you actually read it proves your theory wrong in several places and really doesn't back up your theory...other than that graph...from a magazine article.
Sorry, I don't have any theories, just experience...
Can you read?

88 GT CHI headed 351w 10.8 @ 125 - still figuring it out.
03 Cobra 2.3 whipple 10.7 @ 129 - sold it
04 Mach 1 12.7 @ 109 mostly stock - sold it
89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

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post #53 of 149 Old September 29th, 2009, 02:12 PM
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Originally Posted by ryans88gt View Post

Woody and Jay are not the end all be all of small blocks, you silly little nut swinger.
Trust me ...Far from a Nut swinger on that site.

I might have to try and learn from you and swing from your nuts....

I would learn the right way and be much faster...

Teach me.........

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post #54 of 149 Old September 29th, 2009, 02:13 PM
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...but...you posted a magazine article...which you probably didn't even read...
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post #55 of 149 Old September 29th, 2009, 03:10 PM
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...but...you posted a magazine article...which you probably didn't even read...
You posted "data" from an advertisement web site... seriously...

I also posted information from a real world example from my own experience.

88 GT CHI headed 351w 10.8 @ 125 - still figuring it out.
03 Cobra 2.3 whipple 10.7 @ 129 - sold it
04 Mach 1 12.7 @ 109 mostly stock - sold it
89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

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post #56 of 149 Old September 29th, 2009, 03:13 PM
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Trust me ...Far from a Nut swinger on that site.

I might have to try and learn from you and swing from your nuts....

I would learn the right way and be much faster...

Teach me.........
It is impossible to teach someone that already has there mind made up.

Go get some real heads, put them on your small block and tell me about how velocity isn't important.

88 GT CHI headed 351w 10.8 @ 125 - still figuring it out.
03 Cobra 2.3 whipple 10.7 @ 129 - sold it
04 Mach 1 12.7 @ 109 mostly stock - sold it
89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

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post #57 of 149 Old September 29th, 2009, 03:29 PM
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Originally Posted by ryans88gt View Post
It is impossible to teach someone that already has there mind made up.

Go get some real heads, put them on your small block and tell me about how velocity isn't important.
Like I said before its a combination of parts..

Why would I need to put together a bunch of wrong parts?

I hate the word velocity ......

The cam shaft can help control a lot of the problems you are talking about....

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post #58 of 149 Old September 29th, 2009, 03:30 PM
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Originally Posted by ryans88gt View Post
Those numbers are from before you were even a member on this forum...lol... I don't own a boosted fox, I own a CHI headed solid roller 359 cube small block. Get with the program.



I've been a member on there for longer than you, dumbass...

Woody and Jay are not the end all be all of small blocks, you silly little nut swinger.
Haha, He thinks my car runs 12s too, dont feel bad.


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post #59 of 149 Old September 29th, 2009, 03:38 PM
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Originally Posted by econobarn View Post
Hey look, I can do that too...again...



Taken from: Air Flow Research Cylinder Heads

Why is it every time this discussion begins that article is always linked by some slow person? Every time this shat festival begins that article from a magazine comes out and is supposed to prove something...fail.

Why did you take the 1000-11000rpms away from the bottom of the graph?


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post #60 of 149 Old September 29th, 2009, 03:40 PM
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Why did you take the 1000-11000rpms away from the bottom of the graph?
Because you complained about those numbers last time I used that graph...
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