.937 lifters?
11-30-2014, 02:19 PM
#31
It will not be a Dart 320 when Tommy is done with them but it will have the perfect port to fill 632ci @ 6500 rpm. He's going to use the 320 cause there is alot to work with and its a very beefy head. A lot heavier than most aluminum heads if your are concerned with weight.
11-30-2014, 02:30 PM
#32
Platinum Member
Platinum Member
And if a valve ever dropped take out one head your at someone's mercy. Id go with a nice CNC head not less than 351CC on the intake runner closer to 383CC Make a tone of power with a smaller cam. The HH383MC brodix made 960HP @6700rpm on a 598 10to1-CR.
11-30-2014, 02:52 PM
#33
Registered
Platinum Member
Honestly, My little donzi is gonna go 100 if it kills me or not. I was going to do a blower but my personal goal was to go 100 N/a. When you get down to making power with a 632 you need valve lift. Bob and I have discussed this and he doesn't see an issue with it at all with the big lifters. Only thing I could see is that it's gonna be hard on the springs and I'm going to have to check spring pressure as a maintenance type of thing. It's not a big deal to me I have the tools and use to doing this sort of thing...
11-30-2014, 03:05 PM
#34
Registered
Not to get off topic, but what are you running for a drive on that boat? Iirc it's the old lightning jacks Donzi? I think I saw Jesus once in that boat the way it was setup before...
11-30-2014, 03:16 PM
#35
Registered
Thread Starter
Haha. It has a xr/imco shorty hanging off the back. With a humble ring that was ready to fall apart and two worn out steering Rams I can imagine you may have caught a glimpse of JC.
11-30-2014, 03:22 PM
#36
Registered
Yeah it was faster with the tabs down around 3 so it actually stayed straight lol. Cool boat. I like the big inch stuff. My wallet just won't support it lol. Real cool stuff thanks for posting it .
11-30-2014, 03:24 PM
#37
Registered
Thread Starter
11-30-2014, 03:44 PM
#38
Registered
Thread Starter
I understand what you are saying but if that happens I would weld the head up and run it up to his shop and have him re-CNc the chamber. It would be a lot cheaper than buying another head. The head hunters are not a bad head but i think we can do better with a custom head. The Dart 320 in the right hands has 1200hp capabilities the same as the Head Hunters.
11-30-2014, 04:58 PM
#39
11-30-2014, 05:26 PM
#40
Platinum Member
Platinum Member
Your talking big chiefs? That's what I bought for my engines sweet 16* brodix cost me arm and a leg. flw 515cfm at .900 will se what they make in spring hoping 1075hp on 100LL aviation gas 12to1 CR.
