18 degree Dart Heads.
08-25-2005, 08:03 PM
#1
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18 degree Dart Heads.
Anyone running them yet? I am very interested in seeing how they work on 600" NA motors. Is anyone offering a CNC port for these yet?
Craig
Craig
08-26-2005, 04:20 PM
#3
MarineKinetics
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Re: 18 degree Dart Heads.
Craig,
The raw castings have port sizes about the size of a quarter and then are fully CNC ported (both the 330/383) with Dart's proprietary program.
Bob
The raw castings have port sizes about the size of a quarter and then are fully CNC ported (both the 330/383) with Dart's proprietary program.
Bob
08-26-2005, 05:14 PM
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Re: 18 degree Dart Heads.
randy at cobra power was working with a set but was making more hp with the brodix heads he was using for a lot less coin. give him a call
08-26-2005, 09:13 PM
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Re: 18 degree Dart Heads.
Craig:
Why mess with the 18 degree stuff....step it up to the major leagues!
What you need is a set of Sonnys Hemi heads for Chevy's: your choice 2.45-2.70" intake valves, 1.88-2.00" exhaust, flow 570 on the intake and 390 on exhaust @.900" lift. Your choice 65-95cc chambers. Can be all yours for 14,400 a set race ready 
Go with the 95cc, 110 Octane, put a real cam in your motor, and turn 8500 for a cool 1300hp+. Then you can go after GPM with an NA motor! 
Before you get any ideas you'll need 5" bore spacing.....
Why mess with the 18 degree stuff....step it up to the major leagues!
What you need is a set of Sonnys Hemi heads for Chevy's: your choice 2.45-2.70" intake valves, 1.88-2.00" exhaust, flow 570 on the intake and 390 on exhaust @.900" lift. Your choice 65-95cc chambers. Can be all yours for 14,400 a set race ready Go with the 95cc, 110 Octane, put a real cam in your motor, and turn 8500 for a cool 1300hp+. Then you can go after GPM with an NA motor! Before you get any ideas you'll need 5" bore spacing.....
Last edited by jdnca1; 08-26-2005 at 09:22 PM.
08-27-2005, 08:55 AM
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Re: 18 degree Dart Heads.
Originally Posted by GPM
Wonder how they would work on a Procharged 682.
Quite well I'm sure...!!
Not sure a bravo would care too much for them though.....
Last edited by jdnca1; 08-27-2005 at 09:01 AM.
08-27-2005, 05:15 PM
#10
Charter Member #40
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Re: 18 degree Dart Heads.
I ran the 14 deg Sonny Leonard CNC Big Chiefs three yrs in a pleasure boat. If you got the inches and run the rpm they work. But....they are tough on valve train! Valves are almost a foot long and the lifters seemed to have a short life. I was getting almost 100 hrs on them. Finally said to heck with it, pulled the pistons and heads, went to Canfields with blowers and life has been good
