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Hand porting cnc indy heads #1498093 09/08/13 09:04 AM 09/08/13 09:04 AM
Joined: Nov 2007 Posts: 317 Indiana 7 79_W200 OP enthusiast
79_W200 OP enthusiast 7 Joined: Nov 2007 Posts: 317 Indiana	440-1 345cnc with 2.25 int valve size how much have you gained by having them hand ported. This is a race only 470 engine turns around 8000-8500 for rules i have to use the -1 heads 1979 W200 470

Re: Hand porting cnc indy heads [Re: 79_W200] #1498094 09/08/13 09:32 AM 09/08/13 09:32 AM
Joined: Jan 2003 Posts: 10,000 Frostbitefalls MN (Rocky&Bullw... gregsdart I Live Here
gregsdart I Live Here Joined: Jan 2003 Posts: 10,000 Frostbitefalls MN (Rocky&Bullw...	That is going to depend entirely on how good the cnc job and original valve job was. If they were mine, I would find out who is super sharp in the porting business, and gets the most out of stock/superstock type heads. My reasoning is that the valve job is extremely important in overall head flow, and they will know what to look for in working with your engine/head combo. 8..603 156 mph best, 2905 lbs 549, indy 572-13, alky

Re: Hand porting cnc indy heads [Re: gregsdart] #1498095 09/08/13 09:43 AM 09/08/13 09:43 AM
Joined: Nov 2007 Posts: 317 Indiana 7 79_W200 OP enthusiast
79_W200 OP enthusiast 7 Joined: Nov 2007 Posts: 317 Indiana	INT EXH .200 155 127 .300 236 171 .400 295 206 .500 330 234 .600 347 255 .700 355 268 .800 360 280 1979 W200 470

Re: Hand porting cnc indy heads [Re: 79_W200] #1498096 09/08/13 03:58 PM 09/08/13 03:58 PM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel master
rebel master Joined: Dec 2006 Posts: 4,647 aotearoa	hope those figures aren't the cnc port flow figures as my hand port -1's flow 360@600 & thats with the 2.19 valve.

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