Maximise engine hp and torque with this awesome WRC-style Dual Plenum Intake Manifold

[@botniaproduct]

This product has proven its high quality and excellent performance! MW-Steel is a great Finnish company whose products deserve to be known outside of Finland as well. 🙏🏼 Thumbs up!

[@MW-Steel]

Thanks @botniaproduct. As an experienced race car builder, your feedback is highly appreciated.

[@hfracing]

We did this design dual Chamber intake on my miata 12+ years ago replicating the old rally intakes. Works really well and looks good.

[@MW-Steel]

Glad to hear this and wouldn't have expected anything else.

[@BumpHeadRacing]

@hfracing Do you have any pictures of that intake build? I would be quite interested for in seeing it for my own Miata

[@skerlone]

The advantages of this style of plenum should be more throttle response because of smaller plenum volume. If you make the plenum 3.4 liters for a 4cyl, any regular intake would work the same. A big plenum would ensure equal distribution on all runners no mater how the air gets in the plenum. I read somewhere that it was used on audi 5cyl rally car engine for that reason and it is necessary to insure equal distribution on all runners when using a small volume plenum for response. That means it is beneficial in certain specific circumstances but not a one size fit all solution. To take advantage of this design's potential benefits you would need some of research like try and build 2-3 intakes to test on the dyno to see what works best for your specific application.

[@MW-Steel]

Hi, @skerlone: It is true that throttle response improves the smaller the plenum displacement is. However, based on our experience, nearly all single plenum intake manifolds suffer from irregular cylinder fillings across the cylinder bank, which can be overcome with our conical dual plenum structure, especially in high boost conditions. The beauty of this kit is, that you can keep the plenum volume reduced, and still achieve both benefits, i.e. better throttle response and even air flow distribution to all cylinders, and so by enable to set optimized and max equal timing advances for all. In most cars there simply isn't sufficient space for a large plenum, and in most race cars, the plenum size is mandatorily restricted, hence the wonderful acceptance of this kit. According to our numerous car projects and vast experience, the 3,4L dual plenum manifold displacement of our build kit is optimal for 3 and 4 cylinder engines and enables to place the kit very flexibly to suit the space available in your engine compartment with very positive results, as described in our video above.

[@oscarlainz]

Amazing stuff! Do you offer for mazda Bp?

[@Sh04525]

Very nice

[@MW-Steel]

Thanks!

[@stuartcarter5414]

This system works really well on higher boost application s Original design was from Litchenstien When below 20 psi or 1.5 bar Not a great advantage It does really shine on high boost and makes more mid range torque Highly recommend this when you’re getting serious power

[@MW-Steel]

The higher the boost, the better the conical primary plenum functions.

[@johanvancoppenhagen2795]

Very great concept and will save people a lot of time. Just a pity it won’t work on my current big turbo build F56 Mini Cooper S due to space constraints

[@MW-Steel]

Hi Johan! You could try reducing the size of the pressure box for a better fit. The material is highly machinable and weldable.

[@johanvancoppenhagen2795]

@ Thanks for that info. We currently building a big turbo F56 Mini Cooper S that will run direct port nitrous and direct port methanol injection. With the way BMW built these mini’s they didn’t leave a lot of room around the area where the intake sit. We currently machining an intake manifold but definitely want to look in to your system as some stage as it will dramatically reduce production cost as we want to retail these manifolds

[@MW-Steel]

@@johanvancoppenhagen2795 We're happy to oblige, just let us know when u're ready to rock´n´roll...

[@grantbowers2319]

How would you go about doing this on a twin turbo V8? Would you put a crossover to balance the pressure between the two cylinder banks in the intake manifold or would you recommend doing in the turbo charge pipes?

[@MW-Steel]

Hi, Grant! We've done V8's with separate feeds on both banks, so you may want to try doing it in already in the turbo charge pipes.

[@497adam]

Is this just for forced induction?

[@km6832]

Yes

[@MW-Steel]

Hi, Adam! It's been designed primarily for forced induction applications, but nothing prevents using it in N/A engines as well.

[@497adam]

Have you ever tried one on an N/A engine ? Would there be any benefit?

[@km6832]

@@497adam no real benefit as there is no restriction.

[@497adam]

@ do you mean in terms of it being dual plane or intakes on N/a engines in general

[@vladkruglov7719]

Diy is good but not for all users

[@EngineeringSiblings]

The design is highly neglecting the fact that the distribution of the flow in the plenum connected to the intakes "taper" is not statical, equally distributed, that the "pressure" on the other side of the taper, being bleed of is not equally distributed, and assumes a static flow of fluid.. When flow analysis is made, it is often (read always) simplified by having all of the intake valves open at the same time, and such flow is VERY far from true transient flow where valves are open only part of the time and altering position as it is on the engine. When proper analysis is made, it can easily be shown that for same total volume (all of the volume after TB) there is no benefit with the "twin" taper designs compared to traditional with proper tapering (as the ones shown as "reference" at the end of the video).

[@Mongrel214]

I love these products, but your delivery is so robotic that it would be hard for some people to listen to.

[@Georgianson]

I very much doubt people are going to buy this kit a lot- benefits aren't clear nor quantified and on top of that you need to do it yourself. Doubtful combination. I guess you need to start selling products for specific engines and show the difference in some sort of visualisation...

[@JuhaMartikainen-qu7ej]

It is better than any DIY solution. So it is safe way to build your own manifold.

[@Georgianson]

@JuhaMartikainen-qu7ej how many regular people do know that have necessary knowledge and equipment to build their own manifold?

[@JuhaMartikainen-qu7ej]

Not many or any> this is solution for it.

[@Georgianson]

@@JuhaMartikainen-qu7ej it's not a solution, it's a suggestion. I've been involved in car tuning for last 20 years and I can tell you for sure- only small percentage of people is willing to be involved in DIY stuff. Most of the people prefer to buy bolt-on solution. It's not only about tuning, it's about human being life in general - it's scientific fact that people try to avoid making decisions so based on that fact I would change selling strategy for this product.

[@JuhaMartikainen-qu7ej]

I have been this busines over 35 years, i know this product. It works. And i understand your point. Take it easy.