Because CNC
#102
Former Vendor
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,099
Emilio, can you expound on the effects a ported cylinder head will have on gas mileage? I am more than willing to spend $8,000 on a built N/A longblock but I am not willing to sacrifice the fuel economy that I enjoy so much today. I appreciate that you are working hard to improve the power of the engine, but I think there is a significant market for a set of camshafts that also retains OEM-like fuel economy.
Furthermore,
Furthermore,
#103
Emilio, can you expound on the effects a ported cylinder head will have on gas mileage? I am more than willing to spend $8,000 on a built N/A longblock but I am not willing to sacrifice the fuel economy that I enjoy so much today. I appreciate that you are working hard to improve the power of the engine, but I think there is a significant market for a set of camshafts that also retains OEM-like fuel economy.
Furthermore,
Furthermore,
#105
Emilio, can you expound on the effects a ported cylinder head will have on gas mileage? I am more than willing to spend $8,000 on a built N/A longblock but I am not willing to sacrifice the fuel economy that I enjoy so much today. I appreciate that you are working hard to improve the power of the engine, but I think there is a significant market for a set of camshafts that also retains OEM-like fuel economy.
Furthermore,
Furthermore,
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Pretty basic really.
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#108
Elite Member
iTrader: (2)
Join Date: Jun 2009
Location: Istanbul, Turkey
Posts: 3,214
Total Cats: 1,687
Emilio, how much material - as in grams of aluminum shavings - is removed from the head during the porting process?
I was told 650 grams of aluminum was removed from my 1.8 head. (Or, it could have been the head, intake mani, and the TB, I do not remember exactly)
I was told 650 grams of aluminum was removed from my 1.8 head. (Or, it could have been the head, intake mani, and the TB, I do not remember exactly)
#110
Emilio, can you expound on the effects a ported cylinder head will have on gas mileage? I am more than willing to spend $8,000 on a built N/A longblock but I am not willing to sacrifice the fuel economy that I enjoy so much today. I appreciate that you are working hard to improve the power of the engine, but I think there is a significant market for a set of camshafts that also retains OEM-like fuel economy.
Furthermore,
Furthermore,
#112
Emilio, how much material - as in grams of aluminum shavings - is removed from the head during the porting process?
I was told 650 grams of aluminum was removed from my 1.8 head. (Or, it could have been the head, intake mani, and the TB, I do not remember exactly)
I was told 650 grams of aluminum was removed from my 1.8 head. (Or, it could have been the head, intake mani, and the TB, I do not remember exactly)
#120
Overall, the increase in wear from higher shift points, not from how the head is built. That said, a stock head can't tolerate money shifts without bending all the intake valves. We also see a lot of seat wear on OEM heads that are being shifted at 7200-7400. The race heads with better valves and stiffer valve springs don't seem to have any wear at those ranges. The heads we've built that have dozens of hours above 8000rpm still look good. A stock head shifted at 8000rpm + would have a life span measured in minutes.
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