Twin blower for wedge heads
..What kind of cat?
12-03-2006 | 09:50 AM
#5
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Joined: May 2002
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From: DFW
Re: Twin blower for wedge heads
Tomcat,that is a very sanitary package.
My only reservation with any inter cooler design comes from concern for distribution....Fin and tube density is subject to expansion rate,production tolerances,material,damage and CORROSION.Any one of those factors can effect distribution.
What is your thought on dimpled fin spacing of .1875 or greater ?
My only reservation with any inter cooler design comes from concern for distribution....Fin and tube density is subject to expansion rate,production tolerances,material,damage and CORROSION.Any one of those factors can effect distribution.
What is your thought on dimpled fin spacing of .1875 or greater ?
12-04-2006 | 11:26 AM
#9
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Joined: Feb 2001
Posts: 1,519
Likes: 31
Re: Twin blower for wedge heads
The intercooler is the same but there are lots of other little improvements.
There used to be a two blade throttle body and separate bypass chamber between the blowers and the upper plenum. Now a three blade throttle body fits inside the upper plenum (you can see the TPS), and the front part of the upper plenum is the bypass chamber (you can see the blowoff valve hanging underneath the plenum between the blower outlets).
This cleaned up the air flow and allowed room for the idlers on the secondary belts to push from the inside out, which is better for the Polychain belts. So this version is better than the one that made 1800 HP at Sterling.
Slow the blowers down, build the engine for 6000 instead of 7000 RPM, and it will make 1400 on pump gas with intercooler capacity to spare (900 in3 vs 320 in3 on a double core intercooler for PSI). Fin density is high because we can; after all we have a 10" X 18" hole to go through. Pressure drop across the core alone is ~0.25 psi. Distribution of air through the core is controlled by turning vanes.
Engine recipe and ECU are up to the engine builder. You need good heads but you don't need a big cam and the 50 hour valvetrain that comes with it. At the 1400 HP level you need ~125 lb/hr injectors.
There used to be a two blade throttle body and separate bypass chamber between the blowers and the upper plenum. Now a three blade throttle body fits inside the upper plenum (you can see the TPS), and the front part of the upper plenum is the bypass chamber (you can see the blowoff valve hanging underneath the plenum between the blower outlets).
This cleaned up the air flow and allowed room for the idlers on the secondary belts to push from the inside out, which is better for the Polychain belts. So this version is better than the one that made 1800 HP at Sterling.
Slow the blowers down, build the engine for 6000 instead of 7000 RPM, and it will make 1400 on pump gas with intercooler capacity to spare (900 in3 vs 320 in3 on a double core intercooler for PSI). Fin density is high because we can; after all we have a 10" X 18" hole to go through. Pressure drop across the core alone is ~0.25 psi. Distribution of air through the core is controlled by turning vanes.
Engine recipe and ECU are up to the engine builder. You need good heads but you don't need a big cam and the 50 hour valvetrain that comes with it. At the 1400 HP level you need ~125 lb/hr injectors.
