Thats the manifold that I tested. I can tell by the pics. Look at their website, then look at the one you have. Notice how there are two extra welds on the top. Also look inside the runners there should be blue pipe fittings. Those are my fittings I put in to test the manifold. Also notice the welds around the runners at the flange. They added that to stop the cracks.

With those changes it should be a solid manifold and work properly. Will it make power? I doubt it. Maybe on a car with headers and cams that revs to 7500.

Before you test the manifold make sure those fittings are tight, if not they will suck into the motor and then BOOM.

 

By the way this manifold completely covers the transmission fluid fill tube.

 

Not on a 6MT

Thanks for the heads up.

-Rob

 

It's always amusing that all these companies think they can design something better than the OEM intake manifold.

 

The OEM manifold was never intended to be boosted. So I believe their can be gains with a aftermarket plenum FI, whether it be this, Kinetix, Cos, etc.

-Rob

 

wow, what garbage

 

Looking forward to seeing your results Z1.

 

Here's a Teaser from our NA Plenum Testing, I have to edit a lot of video, organize all the data and still get my car back together for the FI testing.


-Rob

 

Will be interested to see the results. Looks like it'll be awesome! Sexyrob did a similar NA test but I don't think he was able to expand it to this degree. Is there a particular way that a definitive "better" plenum can be established in a controlled circumstance? Are A/F and boost going to be set at one setting and left? Are each going to be tuned exquisitely to see what generates max performance?

Sorry for the noob questions- just wondering how you put sufficient controls in place to ensure that one plenum doesn't have an advantage over the others- other than in its inherent design of course.

 

^^LeGiT, thanks Z1

 

I place my bet on the stock manifold with spacer. Depending on if this is a DE or Revup, and what has been done to the car bolt on wise.

 

The way we found max power for each setup was to let the car cool completely down (which switching the plenum), and idle for about 30 seconds and did pulls back to back until it lost power, some setups took as many as 7 pulls to max, while others were within +/-1rwhp on 5 pulls.

This car was on stock tune, we did log AFR on the dyno so you can see how each plenum affected it, surprisingly it stayed pretty constant with all the plenums.

When we do FI we will log Boost and AFR, I've done some testing on my car in the past (since I own the Cos and Kinetix) and can say first hand the plenum affect spool slightly but the change only modifed my AFR ~.2:1 if that.

I wouldn't put any money on that bet

This is a 04 DE, ~100k miles. Z1 Intake package, Test pipes, Nismo Exhaust, Z1 Lightweight Flywheel/Clutch, and Quaife LSD.

 

out of curiosity, please expound upon this...

trust that I ask, not to disprove your test results - just as a way to understand the methodology.

 

It was the most consistent way of testing for what we were trying to accomplish. A dyno competition style testing. Usually the car makes a good bit less on the first pull (cold pull) and by the 2nd or 3rd you will make the most, beyond that it will start to heatsoak and lose power. By doing this we were able to knock out all the testing within a ~4hour period, and the weather was pretty consistent throughout.

-Rob

 

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