Turbocharger in the Valley of the engine?
10-14-2010, 02:58 PM
#21
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Its not worth it after you need to get custom made heads. You could spend the money on a motor, or anything else. Theres literally no reason for this. Yes thermodynamics wise it would spool a little faster but because the turbo is so close it would also cause alot of heat soak, thus giving you diminishing returns power wise. The EGT that comes out of the heads is not that much greater than that of the EGT's a foot downstream. Also you would have abrupt curves in the manifolds that would lead to the turbo, which would cause turbulence and create more backpressure.
Logisitically, this is a cluster ****.
Logisitically, this is a cluster ****.
10-14-2010, 02:59 PM
#22
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You do realize that by placing a turbocharger on the valley, hence right on top of the intake manifold on an LS engine you are placing a part that reaches temperatures of over 800*F next to your intake charge (which would mean any intercooler use would be pretty much pointless since the cold charge would just be heated above ambient air once again), and if you use a composite manifold instead of a cast iron/aluminum you will end up probably melting it too.
10-14-2010, 03:44 PM
#23
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You do realize that by placing a turbocharger on the valley, hence right on top of the intake manifold on an LS engine you are placing a part that reaches temperatures of over 800*F next to your intake charge (which would mean any intercooler use would be pretty much pointless since the cold charge would just be heated above ambient air once again), and if you use a composite manifold instead of a cast iron/aluminum you will end up probably melting it too.
Take a look at this link, this guy is building a wooden super car and has taken a north star v8 and reversed the cylinder head flow. Yes I know they're not the same engine, but the concept.
http://www.joeharmondesign.com/specifications.html
10-14-2010, 03:50 PM
#24
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Its not worth it after you need to get custom made heads. You could spend the money on a motor, or anything else. Theres literally no reason for this. Yes thermodynamics wise it would spool a little faster but because the turbo is so close it would also cause a lot of heat soak, thus giving you diminishing returns power wise. The EGT that comes out of the heads is not that much greater than that of the EGT's a foot downstream. Also you would have abrupt curves in the manifolds that would lead to the turbo, which would cause turbulence and create more back pressure.
Logisitically, this is a cluster ****.
Logisitically, this is a cluster ****.
10-14-2010, 04:29 PM
#27
Guys, if you can fabricate your own turbo kit, this would be EASY. Get a cam ground with the intake/exhaust lobes switched. Get some flanges, make your own intake/exhaust manifold. It will take some time, but it can be done.
IMO its not worth it since our intake ports flow much better than the exhaust ports, Tommy Ivo did it because it was nearly the opposite (and it was the 60's)
IMO its not worth it since our intake ports flow much better than the exhaust ports, Tommy Ivo did it because it was nearly the opposite (and it was the 60's)
10-14-2010, 04:46 PM
#28
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What about valve problems? The last time I looked at an lax head (about 5 seconds ago) the combustion chamber is not in the middle of the head. It is toward the exhaust side more.
10-14-2010, 09:11 PM
#29
You do realize that by placing a turbocharger on the valley, hence right on top of the intake manifold on an LS engine you are placing a part that reaches temperatures of over 800*F next to your intake charge (which would mean any intercooler use would be pretty much pointless since the cold charge would just be heated above ambient air once again), and if you use a composite manifold instead of a cast iron/aluminum you will end up probably melting it too.
10-15-2010, 01:52 AM
#30
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Why is there no way to justify this? I already gave you two reasons why, this is exactly why most car companies will not build a turbocharged V8 is because of packaging issues. Performance wise if you look at thermodynamics it says the hotter the air flow the faster it will move, so by putting the turbo charger as close to the exhaust port you will keep as much heat in the flow as possible while keeping the velocity as high as possible, meaning you will reach full boost sooner.
.
10-15-2010, 10:27 PM
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Guys, if you can fabricate your own turbo kit, this would be EASY. Get a cam ground with the intake/exhaust lobes switched. Get some flanges, make your own intake/exhaust manifold. It will take some time, but it can be done.
IMO its not worth it since our intake ports flow much better than the exhaust ports, Tommy Ivo did it because it was nearly the opposite (and it was the 60's)
IMO its not worth it since our intake ports flow much better than the exhaust ports, Tommy Ivo did it because it was nearly the opposite (and it was the 60's)
10-15-2010, 10:52 PM
#33
you could just leave the heads the way they are and have a new cam cut that would accomplish this. But the valve and port sizing would be all screwed up. If you could find a cast iron manifold for the LS you could weld a turbo flange on the top and slap a turbo on there. Then build a set of headers to work like an intake, and then take the old headers and smack yourself across the face.
