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Originally Posted by ham_r_down01
(Post 4274604)
Remember everyone "ported and polished" intake runners. It turned out the fuel liked to stick to the runners. Leave them rougher, a little turbulence keeps it flowing instead of evaporating on the walls of the runners. Maybe they have a theory there....??
It would be interesting to put a camera in the chambers and do a side by side test along with comparative Dyno statistics to get to the bottom of the theories. |
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...
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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?
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Originally Posted by frickstyle
(Post 4274644)
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?
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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. |
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.
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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
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3 Attachment(s)
Getting things done!!!
[ATTACH=CONFIG]538139[/ATTACH][ATTACH=CONFIG]538140[/ATTACH][ATTACH=CONFIG]538141[/ATTACH] |
Looking good she will be a ripper for an old heavy strate bottom
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Nicely done tim!
What are you using for painting the blocks when done? Painting them black? |
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