Mistress repower #2 begins....
03-06-2015, 05:00 AM
#192
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I guess I put my trust in a few guys telling me tonuse afr, and also afr themselves, I don't think there is any issue with how they are done...
03-06-2015, 06:27 AM
#193
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Don't think you could go wrong either way. AFR makes a great product. What are the differences in chamber design in a boosted vs. NA setup if any? Can you get away with more in a boosted setup whereas an NA setup is a little more sensitive to "tweaks" or refinement?
03-06-2015, 06:46 AM
#194
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Not exactly sure on that, both dart and afr are nice heads Brodix also.... I went with afr due to recommendations from multiple party's...
03-06-2015, 08:13 AM
#195
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The concept of CNC "chamber porting", is about improving airflow , mainly at lower and mod lift numbers. As well as providing a possibly better "swirl"within the chamber.
"Polishing" the chambers was what many did with as cast heads, esp with supercharging , to eliminate hot spots in the chamber that could possibly induce detonation.
Some used to polish piston tops to a mirror finish. They thought it would be better for reflecting heat off the piston . turned out that was a farce, and they actually found a rougher surface allowing carbon to coat the piston, resulted in a cooler running piston.
The finish of the surface after the cutting tool, IE, shiny vs dull, is not a testament to the quality or performance of the cylinder head in my opinion.
"Polishing" the chambers was what many did with as cast heads, esp with supercharging , to eliminate hot spots in the chamber that could possibly induce detonation.
Some used to polish piston tops to a mirror finish. They thought it would be better for reflecting heat off the piston . turned out that was a farce, and they actually found a rougher surface allowing carbon to coat the piston, resulted in a cooler running piston.
The finish of the surface after the cutting tool, IE, shiny vs dull, is not a testament to the quality or performance of the cylinder head in my opinion.
03-06-2015, 08:20 AM
#196
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Was waiting for you to chime in, also was reading the AFR exhaust ports thread. Didn't you comment extensively on another cylinder head thread? That was also interesting reading.
03-06-2015, 08:29 AM
#197
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Yea I am sure any Cnc name brand head is a good choice, comparing to pro comp I can for sure say the afr is heavier that proves the "cheap casting" to be true in a pro comp
