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The level of modification to the runner exits is based on displacement, cam timing, expected output and intended use.








Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist & Aluminum heads from all sources.
Custom ground cams
See our products in the Vendor for sale section
Customized crate engines
ParklandAutoMachine.com
R-H-P.biz
"Parkland Performance Auto Machine" Formerly RHP
(253)-988-6648
Parkland Auto Machine
 

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Premium Member
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With intake valves back cut your combo will make about 510 ish HP.

The intake is adequate as is. If you turn up the wick with ported heads and want to bias the combo to the hp peak you raise the roof to 1/8" shy of the CJ roof and match the walls to the std gasket NOT THE CJ.

The manifold pictured is on my LTD and was very carefully ported to equalize air flow port to port when the intake was attached to the fully ported SCJ's. That level of detail is very costly.

On smaller 429's and mild 460's 1-3-6-and 8 offer good results. The remaining ports when ported can hurt low end.
Larger more aggressive combinations can benefit from the others.

The RPM air gap has a bit more port cross section from the plenum vs. the rpm.

These dual planes are good to 600+ hp non ported and maybe another 50 ported.
At that point a transition to the T2 or a Victor is in order.

If you are after peak hp only and MPH at the track then the stealth is a good fit. Part throttle manners are less than ideal.








Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist & Aluminum heads from all sources.
Custom ground cams
See our products in the Vendor for sale section
Customized crate engines
ParklandAutoMachine.com
R-H-P.biz
"Parkland Performance Auto Machine" Formerly RHP
(253)-988-6648
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Premium Member
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Thanks a bunch!!! You've given me the guidance I was looking for!! Hats off to ya sir! You are a gentleman and a scholar!!

Actually I am kind of a dick but I hide it well.
Or so I'm told. :oops:






Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist & Aluminum heads from all sources.
Custom ground cams
See our products in the Vendor for sale section
Customized crate engines
ParklandAutoMachine.com
R-H-P.biz
"Parkland Performance Auto Machine" Formerly RHP
(253)-988-6648
Parkland Auto Machine
 
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