Description
A billet aluminum Swirl flap delete…. with benefits! Designed intentionally for the handful of people who are running Water-Methanol injection.
For everyone else — You don’t really need this part. Unlike the Gen1 engines which use individual plastic throttle bodies, the swirl flap system in the Gen2 engines is very robust and does not need to be removed for the sake of reliability, even if it makes you feel better to do it.
As usual, all machining and finishing done in the Pacific Northwest region.
Includes everything you need besides your nozzle and meth kit to get everything plumbed in.
- 3x Plugs (use 1, 2, or 3 depending on your configuration)
- 1x Stainless metal push-connect fitting for FEP semi-rigid boost line.
- 1x 1/8″ / 3mm right angle hose barb fitting
For Single-nozzle setups, I recommend Prometh .25″ Nozzle This is the nozzle selected to achieve the balanced Left-Right/Top-Bottom WMI delivery.
For the Push-connect fitting, I intended for you to specifically use it with 1/4″ OD, 1/8″ ID such as this hose from McMaster since its easy to plumb in with standard 3mm/ 0.125″ hose that Snow kits use for the boost reference.
Snow Performance, and other non-extended nozzle will work with single nozzle only but result in less even Water-meth delivery between banks/ports since more of the mist will stick to the walls before evaporating. Regardless, I have considered this, so the Snow nozzles thread in as deeply as possible without bottoming out.
The story of why i made this relatively niche product….Basically my friend was planning to run meth on his car and bought a similar product from our friends across the pond. I’m going to refer to them as “Cyprus Company” from now on and they know why.
Anyways, it was kind of a terrible design (my opinion). First off, the meth port only goes in the top (non-swirl) passages. This means:
- The atomization / mixing with charge air is necessarily worse, since theres roughly half as much air / volume its getting sprayed into.
- Only half of the intake manifold, cylinder head ports, and valves receive the cleaning benefits from the meth injection, which is one of the “free” perks of running WMI
- Only half of the charge air is being cooled, which means weird unknown stuff will happen when cool, denser air, and much warmer air arrive in the same cylinder. Truthfully i have no idea what would happen but it can’t be good…
- From sims we found the meth is not distributed evenly in left and right channels with the current nozzle position. Part of this is the odd shape of the manifold, but either way its not even.
Cyprus version lacks the support arm that removes strain from the plastic manifold and intake plenum. To save material.
And the design is made as cheap and quick as possible. The size of the part was minimized such that alignment features are only half drilled in the aluminum. The separation between Swirl/non-swirl passages is literally just flat because they didn’t think it was worth the machine time. Air generally doesn’t do well with flat walls in my opinion.
Oh, and they included a PBT fitting for boost line. Which is not rated for engine bay temps idk why they have included that personally but i wasn’t there when they were deciding that to tell them.
As usual, the only thing that motivates me is spite and frustration with literally no concern of how I’m going to make my money back. IDK its worked so far. So i decided to make this product that actually accomplishes the job its supposed to be for.
The design itself was not challenging.
The tough part was choosing the nozzle position so that the spray is guaranteed to be split evenly between top/bottom passages, and between left and right banks.
And the fact that the intake design makes a hard 90 makes it so you really have to model the the intake manifold semi-accurately rather than just assume its a straight pipe to know what the water-meth + air mixture is going to do in the engine. So I hired a guy to help with simulate all of this, because i have absolutely zero idea how to do that, and very little chance of learning between the totally restless sleep i get and the chemicals i’ve inadvertently exposed myself to in the garage in surprisingly large quantities.
It turns out, my initial guess for the nozzle position was really really bad XD, so its a good thing i paid someone to do the sims and check that.
After a handful of iterations, making minor tweaks each time, we settled on what we think is the best nozzle position possible within the constraints of the part and assembly, achieving a tight water-meth distribution between top, bottom, left and right.
With left/right banks receiving WMI mass within 7% of each other, and likewise 4% between the swirl and non-swirl ports across both banks. I’m pretty happy with that.
Besides that, I figured some people might TRY to run dual nozzles, or want to route their water-meth or boost reference lines a little different, so you have options to plumb in your boost ref to the top or back of the part that wont get soaked with the mist from the front nozzle.
I hope that if you buy this part you enjoy it and at least have something nice to look at.
Country of Origin:
- Hard Parts: United States
- Plugs: United States
- Hose Barb fitting: United States
- Push-connect fitting: China
