WebChevrolet Performance service replacement cylinder heads are direct replacements on most 1990-and-later GM Big-Block 454-cubic-inch and 502-cubic-inch engines. These cylinder … WebNov 13, 2024 · Cylinder head porting is a fairly simple premise – increase airflow into the combustion chamber to make more power. However, making it actually happen requires a bit of work. Improvements to airflow quality and quantity come from porting in the bowl area between the valve seat and valve guide because it is an area of restriction.
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WebRevise Search: All Models > 7.4L MPI MIE (L29) Gen. VI GM 454 V-8 1998-2000 > 0L002006 - 0L674613 Find Your Engine Drill down to the horsepower, liters or outdrive model, serial number range and component section to get an online inventory of original and aftermarket Mercruiser boat parts. WebEngine L29 Chevrolet Performance 7.4L (You save $116.13) Engine L29 Chevrolet Performance 7.4L (You save $116.13) SKU: 19207552 Weight: 590.00 LBS Shipping: ... Cast iron cylinder heads with oval ports; Product Reviews Find Similar Products by Category. Customers also viewed ... forensic science matrix effects
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WebAug 30, 2010 · So I have a mild Gen 6 roller 454, 9:1 CR, .483 lift 224 duration, L29 heads, and headers. I'm guessing it makes anywhere from 380 to 425 hp. I want to up the power a bit, but do not know which way to go: either a head swap to aluminum ovals or a small roots supercharger like a 174/177. WebAug 30, 2010 · So I have a mild Gen 6 roller 454, 9:1 CR, .483 lift 224 duration, L29 heads, and headers. I'm guessing it makes anywhere from 380 to 425 hp. I want to up the power … WebDec 19, 2003 · These L-29 big block heads have the BIG oval ports, a modern heart-shaped 100 cc or so combustion chamber that would work great with flattops. Drawback is the … did ww3 almost start in 2020