DThis message has been edited. Last edited by: green1,
The 2xtra is the 2x with cnc porting. I ran the 2Xtra heads for a long time. Mine had cnc porting as well as hand work done to them. They were in the 365cc range. Mine worked well up to my 572.
2018 Dragway 42 Top Champion
According to Brodix: The 2-Xtra is available 1) as cast, 2) CNC'd chambers and 3)fully CNC ported. All show 365cc runners...interesting.
The 2-X shows as-cast at 340cc's.
I know that a while back, I checked on getting some Dart Pro 1's CNC ported, they told me that they use a different casting for the CNC work, claim was it has more material to allow for the CNC porting.
Organized people are just too lazy to look for their $h!t.
is this what you are looking for
opinions are worth what you pay for them
1.036, 6.16@ 224
Flow numbers are like dyno's, so everyones are a bit different.
Also I find Brodix's numbers are consistently on the high side also.
We don't race dyno's or flow benches...
I would say a well ported heads could make three tenths in a car that is slower than ...lets say 9.00's quite probably. The faster you go the harder it is to find those results.
S/R1355 80 Arrow
For any combo to pick up 3 tenths form one single change means something was not right to start with!
With any fully cnc'ed head such as your HH's, there is not a bunch of low hanging fruit there to start with,,,, and 3 tenths quicker with the dragster is over 100 HP. But with any mass produced product, if your willing to go the extra distance, there is room for improvements,,, just not triple digits worth of HP.
I'm a big fan of heads that are a little smaller than heads that would produce the best HP numbers on the dyno.
Give me small headers too.
Look at Stan Weiss site lots of flows listed.Will not give you exact numbers of your heads but should get you in ball park.
Only the stupid know too much to learn something new.
deplorables saving america one vote at a time
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