Quote: Originally Posted by bigsrt4dawg
can someone help me with the difference with dry, wet, and direct port kits?
Wet you inject both fuel and nitrous. Infinitly adjustable a/f ratios
Dry you inject nitrous the MAF on the car adds the extra fuel(srt4's dont have one so it wont add fuel so you cant tune it. Get a wet kit.)
Direct port injects both nitrous and fuel into each cylinder. Recommended for much more than 75hp. This keeps the nitrous and fuel equal in all cylinders. With just a wet kit when you start spraying huge amounts of nitrous and fuel some cylinders will get more, some less. This can cause one cylinder to run lean while another runs rich. Your wideband or the dyno will show your a/f ratios are fine when they are not.
Its always a good idea to have a wideband or tune your system on a dyno. Once you have the a/f ratios right make a run. Immediatly cut the motor and check each plug. Its easy to do this on a dyno. Tune the system and just cut the engine after your last run. Make sure all cylinders are running the same. Compare all spark plugs to each other. If you dont know how to read plugs learn how, and get help in the meantime. Its a good idea to check your plugs after each run or at very least every few runs. Change your plugs often, and make sure to use a colder plug than stock. If they come out sparkling white after driving awhile you may want to go to a colder plug. Sparkling white means it is running really hot. The proper plug should be uniformly tan. NOT bright white. The heat range of the plug is what keeps the plug clean, along with keeping your engine from going bye bye to soon.
Hayabusa
