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Flow# for dart pro1 head?230

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Old 03-30-2005, 08:13 PM   #1
vetteaddic
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Default Flow# for dart pro1 head?230

Does anybody here know what the flow# are for the 230 pro1 are, I tried Darts web site but couldn`t pull anything THANKS
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Old 03-30-2005, 08:42 PM   #2
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my dart pro 1 heads were just flowed with a mild stage 1 port job. I will e-mail the numbers if you would like.

Jerry Myers
Twinturbovette.net
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Old 03-30-2005, 08:53 PM   #3
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Yes Jerry,would appreciate that very much,heres my email..amxzx11@webtv.net THANKS
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Old 03-30-2005, 08:54 PM   #4
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ex-gold87: I'm curious, would you post them here as well?

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Old 03-31-2005, 05:43 AM   #5
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Dart Pro 1 230's:

Lift Int Exh
.200 129 115
.300 184 158
.400 231 185
.500 271 199
.550 288 202
.600 296 205
.650 301 207
.700 308 207

Tested with a 4.155" bore, 2.08" intake & 1.60" exhaust.
28" H20

**************************************** ****
Here's the flow #'s for the Dart CNC 227's - 2.080" x 1.625"
28" H20

Lift Int Exh
.200 158 117
.300 209 149
.400 257 182
.500 293 211
.600 302 220
.700 309 226
.800 314 232

I got these numbers from Dart directly.




Last edited by 71coupe; 03-31-2005 at 05:53 AM.
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Old 03-31-2005, 10:10 AM   #6
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The Dart 227cc is vastly superior to the 230cc because of the altered valve arrangement. I ran them without offset rocker or lifters. Which a smart person would use. They cost about $1000 more than Pro1 200 - 230's

Vetteaddict - The posted 230 figures that 71 listed are for the rough casting. Do your heads show any signs of factory bowl blending and port contouring? The reason I ask is I ordered my original Pro1 215 cc with the optional 2.08/1.625 valves the ports actually arrived at 221 cc. I had them hand port balanced flowed.
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Old 04-01-2005, 09:27 PM   #7
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Based on their Pro 1 215cc and Iron Eagle 230cc flow numbers I have I would estimate they would flow out of the box in the 285-295 cfm range at .700 lift. I never trust advertised flow numbers from the manufacterers own website

A cnc'd version of any of these heads vastly improves the flow at an additional cost of at least $1000 as gkull states above

Last edited by MotorHead; 04-01-2005 at 09:31 PM.
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Old 04-02-2005, 12:26 PM   #8
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I found a web site the otehr day with all kinds of flow data for all kinds of heads, it even has a cool calculator so you can see at what rpm you should make maz hp, i dont know how accurate it is but id like to know if someone else knows, anyways, heres the site http://users.erols.com/srweiss/tablehdc.htm
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