custom air intake?
10-27-12, 10:07 PM
#1
Lexus Test Driver
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custom air intake?
So i got bored and decided to make a custom intake. Most of you guys know they don't make anything for 98-00 and if they do its a arm and leg for it 
. I know it look kinda ghetto / mickey mouse job but not finish yet. i still gotta make a heat shield and better looking bracket.
. I know it look kinda ghetto / mickey mouse job but not finish yet. i still gotta make a heat shield and better looking bracket.
10-28-12, 02:28 AM
#7
I've actually talked to JoeZ about the LS' intake, and basically there isn't much to be improved on. The tubing itself is of a large diameter, the accordion section is probably the weakest part of the intake, very bad for flow. The resonator is personal preference.
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10-28-12, 10:30 AM
#10
Has anyone ever messed with the intake manifold? Would be interesting to see what kind of gains could be made by extrude honing the intake manifold.
Process
A plastic, abrasive-laden polymer media is pushed through a part's channels, like an intake or exhaust manifold while being clamped to the processing machine. The media sands away unwanted material, stress risers, and burrs from the internal passage ways creating a smooth, polished surface. For most applications, the flow of the abrasive media is extruded in the same direction the normal flow of the engine’s fuel and exhaust gasses.
Results
The Abrasive Flow Machining process creates obstruction free passage ways that allow more air, fuel, and gasses to pass quickly through the engine components to maximize increased flow velocity. The result is an motor that produces a faster,cleaner, and more power output. The process routinely delivers increases that can exceed 30 percent on aluminum intake manifolds and 25 percent on cylinder heads and also a cleaner burning, more fuel-efficient motor.
http://www.inlinefour.com/extrudehone.html
Process
A plastic, abrasive-laden polymer media is pushed through a part's channels, like an intake or exhaust manifold while being clamped to the processing machine. The media sands away unwanted material, stress risers, and burrs from the internal passage ways creating a smooth, polished surface. For most applications, the flow of the abrasive media is extruded in the same direction the normal flow of the engine’s fuel and exhaust gasses.
Results
The Abrasive Flow Machining process creates obstruction free passage ways that allow more air, fuel, and gasses to pass quickly through the engine components to maximize increased flow velocity. The result is an motor that produces a faster,cleaner, and more power output. The process routinely delivers increases that can exceed 30 percent on aluminum intake manifolds and 25 percent on cylinder heads and also a cleaner burning, more fuel-efficient motor.
http://www.inlinefour.com/extrudehone.html
10-28-12, 03:24 PM
#13
the '98+ heads flow WAYYYY more than the earlier ones, the bottleneck for those isn't flow in, it's flow out. The exhaust manifolds (while not being as terrible as the SC/Crown) are probably your biggest $$/hp gain. After that you really would need to be looking at getting some new cams and tuning some of the fuel out of the car (as it runs pig rich, probably via a piggyback tuner).
try searching the GS400/sc400 forums, there's a general consensus for gains to be had for the '98+ cars.
try searching the GS400/sc400 forums, there's a general consensus for gains to be had for the '98+ cars.
10-28-12, 03:35 PM
#14
the '98+ heads flow WAYYYY more than the earlier ones, the bottleneck for those isn't flow in, it's flow out. The exhaust manifolds (while not being as terrible as the SC/Crown) are probably your biggest $$/hp gain. After that you really would need to be looking at getting some new cams and tuning some of the fuel out of the car (as it runs pig rich, probably via a piggyback tuner).
try searching the GS400/sc400 forums, there's a general consensus for gains to be had for the '98+ cars.
try searching the GS400/sc400 forums, there's a general consensus for gains to be had for the '98+ cars.
10-28-12, 05:28 PM
#15
the GS guys have had some success using piggybacks like A'pexi SAFC Neos to tune some of the fuel out. If you wanted much better gains (in theory) a full standalone would allow you to advance the timing to some degree, but afaik this hasn't been done on an NA vvti 1UZ.
Lextreme's forums will help you do some more research.