![]() It continues to remain smooth.Īnother major change noticed was how loud the intake noise became. Even in between gear changes, there doesn’t seem to be the slow rev climb back to fuel cut now. In first gear you notice there is no dip whatsoever in power, it’s smooth all the way until fuel cut and the revs climb a lot faster than before. I decided to do a quick pull from 1st and another rolling in 2nd to get an idea of the gains.īoth pulls went to the start of 3rd so within the speed limit. The first impression was that down low is almost the same as before, I did notice that the response had increased nicely and the revs climb a lot smoother and quicker than before. With no issues, I let the car warm up and took it for a spin. Once installed, I started the car and checked for any strange noises, leaks etc. Now, having this done I can provide what to expect with this style of ported manifold. The combination of the improved velocity stacks and the removal of the pillars is what is completed in terms of the porting on my particular manifold. These are ground down and evened out to increase flow.Ĭomparisons between a stock intake manifold and a port manifold. From Toyota, the casting is poorly completed, Leaving what resembles slanted donuts throughout various manifolds. On top of the plenum, you will see velocity stacks at the of the runners. These are cut out and the remaining metal ground down to reduce any flow interruption into the runners. Within the plenum section of stock 2 piece manifold, you will see 2 pillars that are within the manifold that affect air flow to each runner. The manifold runners are removed and the plenum section is cut open to begin the work. I know this might deter people into thinking ‘ it’s not a fully ported manifold ’, but please keep reading through. The runners are left as is, this is specifically within the plenum and prior to the runners that are cleaned up and ported. This what is done to the manifold in regards to porting. ![]() This is not to cause controversy by any means but is to simply get the information out there for more people to develop their N/A 2ZZ’s to the very best. Many people may think that porting the manifold is a waste of time and that you might as well go down the route of turbo or supercharging, or to go for an aftermarket manifold such as the DDP manifold. Well, I’m writing this as a review of a ported intake manifold after recently purchasing and installing one. This has previously been discussed a long time ago about porting the intake manifold on the 2ZZ (specifically the Sportivo manifold as it can be split into 2 pieces).
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