whats the diff between pro 1 380"s and pro 2 380's
 

my bbc dart heads are machined pro 1 380. i see dart has there heads listed as pro 2 380's. whats the difference anyone.

I believe the pro 2's are fully cnc'd.

they are the cnc'd versions

The Pro-2 are a oval port head and they are CNC ported (fully) and they claim big flow numbers from a conventional head.

They are different in the way the casting is and the CNC work on the heads. They are very impressive but have some flaws. My friend could not get his Dynatech downswepts to bolt up. They were the bigger tube header. Some say the smaller tubes will bolt up. They also tend to hold more oil in the head which created a lot of overflow issue with his vacuum pump. That was corrected with a tall valve cover and baffles. All in all, the performance is very impressive. He has 2003 Worthy 230" swingarm. The 565 is running 7.40's/50's with this set up.

My Dart Pro2 380's were just delivered yesterday. They are CNC'd in both sets of ports. The ports are massive! I am going to bolt them on a Dart Big M 598 and see what they do. Thanks for the heads up on the oil slopping into the vac pump, Shawn. I am going to install a vac pump, so I will put a baffle under the vacuum intake in the valve cover. I will let everyone know if I have any issues with them.

They do but almost all these shops inflat #'s pretty good


Anyone buying new conv heads is nuts not to buy the Brodix Headhunter or 3x's , proflier also has a new head out thats impressive.

You sure the Pro-1's are not 345's, or 325's? There isn't a Pro-1 380. There is 310, 325 and 345's. There is race series 360's and 320's. There is also 335 and 355 Pro-1's that are cnc ported. Otherwise, the only other 380cc conventional head, that isn't really conventional, from dart that is, is the 380 oval ports, that are 18 degree, but like a conventional head.

The Pro2 380's are pretty killer and will run with any of the other killer conventional heads. They also respond to additional work, and can really make power.

Frank

i was chuckling when i heard the first three people talk on this thread

Check on the left side

http://www.raceflowdevelopment.com/RFD-heads.htm

If ya do a search it brings up a lot of "Dart 380 Pro 1"

oginally called the Dart Pro 1 380