[ctd.fab]

Hey guys. I just wanted to chime in on this thread because I have quite a bit of experience with building intake manifolds for the gen.

First of all I would like to introduce myself. My name is Vince and I am the fabricator at Predator Performance and am in no way selling anything so please don't ask me.

After having issues with the fragile plastic IM I engineered and fabricated a dual plenum intake manifold. For those of you who are not familiar with a dual plenum design please do a little research before asking the basic questions.

I choose the design based on the chassis constraints and intended use. The stock IM is actually the worst design I've ever seen, small plenum and bad flow characteristics. With the dual plenum design was able to fit the size runner I calculated and also increase plenum volume while equalizing flow across the 4 runners perfectly. The runners also have a dual taper and a fully rolled edge for maximum velocity.

We have dyno tested this IM with many different setups from stock turbo to 35r with awesome results.

 

[GenCoupeGeek]

18AFR happened on the aftermarket IM....

Did you read my post?

P.S. I never called anyone's intake a mailbox, I just said a mailbox welded to some runners is better than the stock garbage POS

I wasn't actually talking about any particular IM (OEM or Aftermarket) as the effect would be the same.

but... if it makes you feel better, I did read your post

 

[ctd.fab]

I've seen ported manifolds in person (grimspeed) and there is nothing they do to correct the stock IM downfalls. In my opinion porting the head flange to try to port match it has a negative effect on port velocity.

All of the aftermarket single plenum IMs I've seen use much too large of a plenum and due to the space constraints use to short of a runner which moves the power curve too far to the right.

I think I have a few CFD analysis screenshots that show how these different designs actually work. It's very interesting stuff!

The stock IM is only good for stock tunes but quickly shows its weaknesses when the turbo is turned up. We actually saw close to 30whp gain if I remember correctly with just the addition of a bolt on dual plenum over the previous tune. I have the graphs and data if you guys want to see.

Also just because an intake manifold is made from sheet metal it doesn't mean its any less of a quality part. I personally handmade and form my IM from 0.125 sheet and tube extrusions that are custom formed in house. Given proper design you can achieve a very strong product that will not fail from fatigue and have less mass to heatsoak compared to a cast manifold.


Given what the genesis market will pay for an IM it doesn't make any sense to machine anything IE billet flanges and runners. Hell I even put way too much labor intake making mine, takes about 12-15 hours each depending on the batch size.

It's fun making Hyundais fast

 

[turbohcar]

People REALLY need to get over the cost of things around here. Pay to play, that's the kind of hobby this is. Go look at what parts cost for other cars, it's never cheap. I don't know why people think that just because they bought a cheap car, that it would be cheap to mod too. $1400, if it's a quality manifold that actually works, is a GREAT price. Everyone shits on this community because people are so cheap!!

I wasn't complaining, I just wanted to make my own manifold and more wanted to talk about the design of it and the lack of vendors for intake manifolds for the 2.0T. Don't hate on me, I just enjoy building it myself if it's feasible.

Good discussion overall

 

[Jedsred89]

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