Quote:
Originally Posted by Toma
(Post 1060339)
Aquamist stopped using their good quality magnetic pumps and is using the same bricks as anyone else.
If you ad meth injection to a good tune pump gas engine, you WILL lose power. To get it back youll have to lean it.out raise boost and add timing.
We went to multi point injection in then 80s. If you are gonna RELY on ur kit.... I would run mostly water and put one nozzle in every port.
10 years ago or more we replaced the side of a 2jz intake with plexiglass and ran 650cc on a 650hp engine with 2 nozzles before the throttle body. You could see rivers of water flowing down the walls making a pull on the dyno. You will NOT get equal distribution....and we were using misting nozzles that were over $100 each. The ones with a water inlet and one for compressed air.....extremely fine spray. Better than what you get in kits today AND we were running off 30 bar magnetic pulse pumps.
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We certainly never said to add WMI to a car without tuning it, so hopefully that comment wasn't directed this way. :)
This is not our first rodeo with WMI. We tuned and ran WMI on our GT35R Time Attack Scion tC for two race seasons and have two championship trophies to show for it. The car made 565whp with a single 650cc nozzle pre-throttle body on 93 pump gas. The car was run BTTW for half hour sessions at a time with no tuning issues.....no drag or dyno queens here. Our lead tech has been running the same WMI system on his 350whp xA for DD, drag racing, autocrossing, and time attack for the past 5 years and over 120K miles. We've made over 350 dyno pulls on our turbocharged FR-S with a single WMI nozzle and a recent leakdown test shows a perfect 3% leakdown across all four cylinders. ;)
If you weld a standard of-the-shelf 1/8" npt bung to you IC pipe, your nozzle will spray like a garden hose since the spray pattern will be distorted when it hits the side of bung. Most WM nozzles have a short threaded body with a wide spray pattern. We found this out by bench testing the nozzle with the different bungs before welding it to our intercooler pipe. We custom machined custom NPT bungs to prevent this from happening.
Nothing is absolutely perfect in the world of performance, but it'll never keep people from modding their cars. A direct port nozzle would be the best performance-wise, but still isn't the be all end all.
Let's take two scenarios here:
1) You have a 6 cylinder engine with a single nozzle and your guess is that the cylinders get a WM distribution of: 20% as the highest and 14% as the lowest due to manifold design, etc. based on data from individual WB O2 sensors on each exhaust runner. After a few dozen dyno pulls and constant tuning you'll end up with an AFR and timing map to work with this imperfect, but non-changing WM distribution. Basically tuning for the weakest link.
2) You have the same 6 cylinder engine with 6 individual nozzles. You tune the car with perfect 16.7% WM distribution to each cylinder. You create a timing map and settle on AFR's that give you super sweet results that are slightly better than what you were able to achieve with a single nozzle. A couple of months down the road the car starts losing compression in one cylinder. You go to find that one of the nozzles is partially clogged, but you had no way of knowing, because the failsafe parameters that were set couldn't detect that one of six cylinders were only getting a fraction of the WM that it should receive.
Moral of the story, nothing in the performance world is absolutely perfect, but we'll go with what we know works. In the end though, we'll likely sell the WMI nozzles a la carte and let the customer decide how they want to set up their nozzle system. :thumbup:
