Custom vg30/33 intake manifold
Posted 16 October 2012 - 04:13 PM
some pictures of the process so far.
started by making the bottom plate.
here are the inlets in an early stage of bellmouthing.
Posted 08 November 2012 - 09:39 AM
Posted 08 October 2013 - 06:10 AM
this is my setup as it sits today.
still needs a few things...
as you can see im building a turbo setup. the stock manifold doesnt have enough volume and the gutted manifolds apparently flow worse than stock and i can see why. turbulence is something that kills flow which is why i have done everything in my power to keep flow as high as possible. every on of those joints in the pie cuts have been ground and sanded, the intake is the same diameter from the exit of the turbo all the way to the inside of the plenum (3 inch) my DP will be pie cut and the wastegate will probably be mounted upside down below the turbo and vent straight to the ground. yes, i have done quite a bit of research and development on this setup and hopefully my calculations show results.
Edited by grim369, 08 October 2013 - 06:15 AM.
Posted 08 October 2013 - 08:05 AM
Interesting. What's the volume? I might start making something similar in the future. I need it to not go much more than 1/4" higher than a stock maxima manifold though.
It is not recommended to confirm proper installation by driving into walls or other barriers as this could cause personal injury or damage to the vehicle.
Posted 10 October 2013 - 11:18 PM
Pretty much like my effort except mine was a rear entry because in a 280ZX there was more height to be had there. Height is needed so that air can turn 90 degrees into the inlets instead of skipping over their tops. Good on you for having a go, just make sure that there is a significant improvement to be had at the end of the day. See my thread on the viability of the good old single cam VG
Posted 17 October 2013 - 01:45 PM
You might look at some of the other designs we have seen on here. Most notably a couple points on these:
1. The designed plenums usually have most of the internal corners filled and shaved. That way as air flows by there's a lot less turbulence than you'd otherwise see.
2. Another point is to note that on most of the custom intakes, the volume gets much smaller as you get father away from the throttlebody. The effect of this is air velocity. As you move farther away, the air loses momentum. Having the Plenum narrow toward your back cylinders ensures even combustion. Look at the plenums that Mark made in this same v6 section. you'll see what I'm talking about.
Edited by Pharaohabq, 17 October 2013 - 01:46 PM.
Posted 17 October 2013 - 02:17 PM
Posted 09 January 2017 - 08:54 PM
Posted 29 January 2017 - 11:47 PM
The air intake from the throttle body to the upper plenum should be straight, put any bends in before the TB with a straight as possible immediate entry to the TB. Otherwise it's hard to tell much, looks tidy enough.
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