Inverted flow LS heads?
09-10-2011, 02:21 AM
#2
TECH Resident
09-12-2011, 10:04 AM
#5
Anyone have any links about this technology?
Edit: This is about all I could find
http://www.youtube.com/watch?v=tdbvluVB6Ok
Edit: This is about all I could find
http://www.youtube.com/watch?v=tdbvluVB6Ok
Last edited by 1SLwLS1; 09-12-2011 at 10:10 AM.
09-21-2011, 05:52 PM
#6
makes more sense on a single turbo, where you reduce plumbing...
That's how the 4.5 duramax is/was/will be set up
An LS1 is workable with just a custom cam, (exhaust would flow out the intake valve, and ports), although the results would be much better with heads designed with the ports matched to their job (could use off the shelf cam)
That's how the 4.5 duramax is/was/will be set up
An LS1 is workable with just a custom cam, (exhaust would flow out the intake valve, and ports), although the results would be much better with heads designed with the ports matched to their job (could use off the shelf cam)
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09-26-2011, 04:08 AM
#9
Teching In
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Back in the day there were some racers that did this with Buick Nailheads. Custom ground cam was one thing required. With the nailhead it also required forced induction to make it work. Obviously special designed intake and exhaust piping/routing as well.
http://www.carcraft.com/thehistoryof...ead/index.html
What seemed to separate the nailhead-powered cars from the rest, though, was the variety, ingenuity, and downright weirdness that Hot Rodders had developed to go faster with Buicks. We found cars that were rigged with every possible multi-carb setup under the sun. Six Strombergs, two WCFB four-barrels, three deuces, and everything in between. A few of the more serious drag cars sported huge chain-drive Roots-style blowers. A wild NHRA A/D drag roadster was equipped with twin McCullough centrifugal superchargers. But one of our favorite nailhead-powered cars was a dragster photographed at the ’58 NHRA Nationals. This Buick was squeezed with a crank-driven blower, which fed pressurized air into...the exhaust ports? That would explain why the exhaust was ducted straight out of the intake. This would be possible provided the cam was re-ground to operate the valves correctly. We don't know how this reversed-port deal improved the heads’ efficiency, but it sure looks wild.
Read more: http://www.carcraft.com/thehistoryof...#ixzz1Z31npLlY
http://www.carcraft.com/thehistoryof...ead/index.html
What seemed to separate the nailhead-powered cars from the rest, though, was the variety, ingenuity, and downright weirdness that Hot Rodders had developed to go faster with Buicks. We found cars that were rigged with every possible multi-carb setup under the sun. Six Strombergs, two WCFB four-barrels, three deuces, and everything in between. A few of the more serious drag cars sported huge chain-drive Roots-style blowers. A wild NHRA A/D drag roadster was equipped with twin McCullough centrifugal superchargers. But one of our favorite nailhead-powered cars was a dragster photographed at the ’58 NHRA Nationals. This Buick was squeezed with a crank-driven blower, which fed pressurized air into...the exhaust ports? That would explain why the exhaust was ducted straight out of the intake. This would be possible provided the cam was re-ground to operate the valves correctly. We don't know how this reversed-port deal improved the heads’ efficiency, but it sure looks wild.
Read more: http://www.carcraft.com/thehistoryof...#ixzz1Z31npLlY
