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To Spray or not to Spray

Well...sometimes you gotta do whatcha gotta do I guess! but holy smokes... sometimes these nitrous installs are pretty sketchy! We have seen a few scary installs in our time, zip ties even, which brings a question to mind: If there was a Nitrous TB plate that you could run instead of these fogger nozzles wouldn't that be the better option? Let’s think about this...

 First of all, the concept of using a throttle body plate as a means to deliver nitrous oxide to the incoming air charge is not a new concept. There are already several manufacturers making throttle body nitrous plates for late model domestic V8 applications that do just this. They seem to work pretty well too! In our experience they are really straight forward to install. Changing jets to tune nitrous and fuel delivery takes about 3 minutes. Freezing your throttle open after a long hit won’t happen anymore. It is far easier to achieve an aesthetically pleasing installation as compared to any fogger install, direct port or otherwise. Oh yea and there is the possibility of building the solenoids right into the plate which makes for a very compact installed footprint and less fittings you have to deal with.

 I know what you’re thinking though…you can’t guarantee even distribution! Well what is “even”? If you had to put a tolerance on it how tight would the tolerance be on variance between distributed nitrous per cylinder?   

 We looked hard for testing performed with a nitrous throttle body plate on a “small displacement” 4 cylinder application. We couldn’t find any testing performed with a high level of pedigree that satisfied our inquisitive minds. The question of even distribution is really hard to dismiss without cold hard data. Collecting the necessary data will require a dedicated O2 sensor be installed in each exhaust runner. Logging the air/fuel ratio simultaneously of each cylinder over a dyno pull will reveal nitrous distribution characteristics of the throttle body plate. Testing can also look at distribution characteristics with different shots of nitrous. For example, the distribution signature with a 50 shot might be different from a 150 shot. A controlled test on the dyno with the same car will result in the empirical evidence required to answer the question of distribution.

 So how does the nitrous throttle body plate work? There are two rows of cross drilled holes. One row for fuel. One row for Nitrous. The exiting jet direction of the Nitrous will intersect the exiting jet direction of the fuel. The velocity of the Nitrous will be much higher and pulverize the jet of fuel causing atomization of the fuel to occur. It would be like turning on a garden hose in one hand and then shooting that stream with a pressure washer in the other hand. The result is an atomized "wall" of mixed fuel and N2O just behind the throttle blade.

We will be revisiting this subject after testing is performed with a test car on the dyno. We will post up all test results and data logs for discussion. We are really excited about what we learn next! Until that time here is a video talking about some of the Nitrous Plate features as it currently exists in concept.

 Stay Tuned,

Brandon Vazquez

Mechanical Engineer


6 Comments – doxycycline 100mg canada

Posted by Psycladdy on March 16, 2021

Any updates on this I want one for my h22a 97 prelude

Posted by John Lawrence on April 29, 2018

I would like to be one of the tester and I’m willing to pay for it too
My car is a 1996 civic hatch with k24/k20 making 275whp with 210 tq with the rbc manifold .. Now I’m a running a center feed 74 mm not tuned yet but I would be tuning with nos but I want to give the plate a try and we are from redzonerace in Antioch ca.

Posted by Lam on October 26, 2016

Would love to know when we can expect the nitrous kit out for the H22 guys ?

Posted by Dean on October 07, 2016

I’ve wondered for a long time why these weren’t already on the market years ago. Hoping to try this out soon!

Posted by TRENT ERVIN on September 17, 2016

Just wanted to say i have a nitrous throttle plate kit on my 08 trailblazer ss with a ls2 from nitrous express..Works great and love simplicity…Dont think it would be hard to make a throttle plate kit for hondas.Alot of companies make throttle body spacers like one from (Airraid) and not hard to drill holes onto it and attach own personal opinion..if you do make one i am interested in purchasing it..

Posted by derek mosley on September 12, 2016

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