Big Block Dart Forums banner

stealth CNC ported heads!

10K views 18 replies 12 participants last post by  Pro Street dart 
#1 ·
440source is now offering CNC ported stealth heads. i spoke with them about the heads and flow numbers are around 324cfm @ .600" personally i think they look pretty darn good.

wonder if they would be able to catch up to the indy SR max wedge 295cc 355cfm heads...???

http://www.440source.com/cncheads.htm
 
#5 ·
You can send your Stealth heads to Modern Cylinder Head for the porting. You'll just have to contact Modern to see what the cost would be but I've had Modern port several sets of heads for me and the price is very fair considering how much power they pick up. A set of Indy EZ heads picked up over 100 hp after they were CNC ported by Modern.
 
G
#7 ·
moparmat68 said:
440source is now offering CNC ported stealth heads. i spoke with them about the heads and flow numbers are around 324cfm @ .600" personally i think they look pretty darn good.

wonder if they would be able to catch up to the indy SR max wedge 295cc 355cfm heads...???

http://www.440source.com/cncheads.htm
Interesting - that's what Modern says they'll get with their cnc'd Eddy heads LOL They're TOTALLY different heads though LOL

http://www.hotrod.com/techarticles/hrdp_0801_mopar_intake_manifolds/index.html
 
#10 ·
Flow Chart: CNC Stealth Cylinder Heads
Flowed at 28" on a 4.380" bore with a Superflow 600 bench.
Exhaust flowed with 2" tube.

Valve Lift: Intake CFM: Exhaust CFM:
.100" 75.0 72.9
.200" 156.7 124.8
.300" 219.8 166.4
.400" 266.2 198.1
.500" 298.8 219.3
.550" 306.2 228.6
.600" 314.9 233.3
.650" 320.7 238.2
.700" 320.7 243.8
.750" 321.6 248.2
 
#16 ·
Id bet that is a pair. Thats $1100 for porting.
I compared the flow ###s and thats an 18% average in flow gain.

I figure without a bench, I gained 8-10% with a grinder and $100 to my
machinest buddy who backcut the valves and touched up the valve job.

Still for the extra $1000, I will take what I have.

I could have gone to -1s for $2500 that were allready cnc'd

Rick
 
#19 ·
andyf said:
You can send your Stealth heads to Modern Cylinder Head for the porting.  You'll just have to contact Modern to see what the cost would be but I've had Modern port several sets of heads for me and the price is very fair considering how much power they pick up.  A set of Indy EZ heads picked up over 100 hp after they were CNC ported by Modern.
$1000 during their group purchase to CNC port Stealth heads.
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top