2.0t Ram Air Made With 3.8L V/6 Throttle Body
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487 Posts
Mis-titled a little... Sheet Metal intake with 3.8L Throttle Body would be more aptly named.
Also seems to me, to be kinda silly not to properly weld and design the plenum and intake runners into a single unit instead of using such long runners and silicon couplers.
Also seems to me, to be kinda silly not to properly weld and design the plenum and intake runners into a single unit instead of using such long runners and silicon couplers.
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10,831 Posts
Nah, just thought it was neat & decided to share.
Yeah, I'm to blame for the title. I just copied & pasted it, but couldn't think of anything better to name it at the time.
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151 Posts
not sure about turbo'd engines but longer runners generally give better top end power with shorter runners giving bottom end tourqe>
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1,307 Posts
Interesting. I can understand the silicone connectors somewhat as they will act as a barrier to heat transfer similar to an intake manifold spacer but I'm not to sure how good of an idea that really is. The manifold design is simple enough but still could use some fine tuning for sure. I'm sure that eventually we will see better intake manifolds come about but that also depends on how restrictive the stock one actually is.
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30 Posts
Nope you got it backwards. Shorter runners give better high end horsepower. Why do you think Hondas have short runner intakes on the vtec models and long on non vtec.
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1,190 Posts
Or both like the GSR.
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112 Posts
no he had it right your wrong. and hondashave short runners to try and make up for not having any low end power. it just like the diff between a short ram and cold air intake
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Yep like I said long runners equal low end torque while short equals higher end hp.....
Intake Manifold Runner
Manifold, in an automotive application, means a pipe through which something flows. Nearly all engines have an exhaust manifold--the pipe through which exhaust flows--and an intake manifold, which is the pipe through which the intake air charge flows. Most modern engines break the intake and exhaust manifolds into separate pipes that serve each cylinder. So the intake manifold runner is the pipe leading from the throttle to the cylinder head where the intake valve allows air to enter the cylinder.
But it's not simply a pipe. Each time the intake valve opens, it sets up a pressure wave that propagates back up the intake runner. There, it reflects off the throttle and travels back down the runner. This happens many times per second as the intake valve pops up and down. As you can imagine, the pressure distribution inside the intake runner is a very messy place. But at certain RPMs, the propagation of this intake runner gets in sync with the intake valve so that just as the intake valve opens, it also experiences a positive pressure wave. This pressure wave helps force the intake air charge into the cylinder in a process not unlike supercharging. It's not as strong as supercharging and is not constant, but for certain RPM ranges it can cause a significant improvement in performance.
Naturally, a long intake runner will require more time for the pressure wave to propagate up the intake runner and back to the intake valve. This means this engine will have a torque peak at a lower RPM range than an engine with short intake runners. Trucks and work vehicles typically have long intake runners, while those of a sports car might be very short. Passenger vehicles might have an intake manifold with intake runners of different lengths to spread out the torque curve into a broader but lower and more manageable profile.
Intake Manifold Runner
Manifold, in an automotive application, means a pipe through which something flows. Nearly all engines have an exhaust manifold--the pipe through which exhaust flows--and an intake manifold, which is the pipe through which the intake air charge flows. Most modern engines break the intake and exhaust manifolds into separate pipes that serve each cylinder. So the intake manifold runner is the pipe leading from the throttle to the cylinder head where the intake valve allows air to enter the cylinder.
But it's not simply a pipe. Each time the intake valve opens, it sets up a pressure wave that propagates back up the intake runner. There, it reflects off the throttle and travels back down the runner. This happens many times per second as the intake valve pops up and down. As you can imagine, the pressure distribution inside the intake runner is a very messy place. But at certain RPMs, the propagation of this intake runner gets in sync with the intake valve so that just as the intake valve opens, it also experiences a positive pressure wave. This pressure wave helps force the intake air charge into the cylinder in a process not unlike supercharging. It's not as strong as supercharging and is not constant, but for certain RPM ranges it can cause a significant improvement in performance.
Naturally, a long intake runner will require more time for the pressure wave to propagate up the intake runner and back to the intake valve. This means this engine will have a torque peak at a lower RPM range than an engine with short intake runners. Trucks and work vehicles typically have long intake runners, while those of a sports car might be very short. Passenger vehicles might have an intake manifold with intake runners of different lengths to spread out the torque curve into a broader but lower and more manageable profile.
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4 Posts
This stuff should be common sense for the average Honda head. Short-hp/long-tq :clap:
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