Mistress repower #2 begins....
03-05-2015 | 03:49 PM
#182
Thread Starter
Gold Member
Joined: Oct 2005
Posts: 11,692
Likes: 217
From: Olmsted Falls,Ohio Marblehead,Oh
I was at Summit today, I looked at heads to compare, I was surprised the CNC job on Dart, expected better.....
My AFR look amazing CNC chamber job....
First is my AFR...second is Dart..
[ATTACH=CONFIG]538061[/ATTACH]
[ATTACH=CONFIG]538062[/ATTACH]
My AFR look amazing CNC chamber job....
First is my AFR...second is Dart..
[ATTACH=CONFIG]538061[/ATTACH]
[ATTACH=CONFIG]538062[/ATTACH]
03-05-2015 | 04:49 PM
#183
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Joined: Nov 2004
Posts: 14,152
Likes: 3,714
From: On A Dirt Floor
There may be a reason for them leaving the ridges in there and maybe there isn't.
Can't always go by looks.
BTW: On one of my spacers I was getting some fuel distribution issues, that by having deeper cnc ridges vs polished, help'd out a lot. Couldn't believe it , but at the same time, I could. If you know what I mean.
Anyway, again, can be there for cost cutting reasons, or better performance reasons, or....doesn't influence anything.
You can only tell by strict testing.
Can't always go by looks.
BTW: On one of my spacers I was getting some fuel distribution issues, that by having deeper cnc ridges vs polished, help'd out a lot. Couldn't believe it , but at the same time, I could. If you know what I mean.
Anyway, again, can be there for cost cutting reasons, or better performance reasons, or....doesn't influence anything.
You can only tell by strict testing.
03-05-2015 | 08:31 PM
#187
Thread Starter
Gold Member
Joined: Oct 2005
Posts: 11,692
Likes: 217
From: Olmsted Falls,Ohio Marblehead,Oh
There may be a reason for them leaving the ridges in there and maybe there isn't.
Can't always go by looks.
BTW: On one of my spacers I was getting some fuel distribution issues, that by having deeper cnc ridges vs polished, help'd out a lot. Couldn't believe it , but at the same time, I could. If you know what I mean.
Anyway, again, can be there for cost cutting reasons, or better performance reasons, or....doesn't influence anything.
You can only tell by strict testing.
Can't always go by looks.
BTW: On one of my spacers I was getting some fuel distribution issues, that by having deeper cnc ridges vs polished, help'd out a lot. Couldn't believe it , but at the same time, I could. If you know what I mean.
Anyway, again, can be there for cost cutting reasons, or better performance reasons, or....doesn't influence anything.
You can only tell by strict testing.
03-05-2015 | 10:53 PM
#189
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Joined: Nov 2013
Posts: 834
Likes: 63
From: The pinnacle of awesome
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....??
03-05-2015 | 11:32 PM
#190
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Joined: Jun 2009
Posts: 9,989
Likes: 6,483
From: Chicago
Once an atomized air/fuel mixture hits a smooth surface it will turn to liquid (droplets) again. Liquid does not burn as easily. The rough surface keeps the fuel atomized.
That being said mine are as smooth as a babys bottom.
That being said mine are as smooth as a babys bottom.
