what's the problem with wet kit before the MAF on a LT1, will it work, have a new two stage kit about to put in.

 

You do not want to spray a wet kit before the maf. Now if your spraying a dry shot before the maf its a crap shoot. Some people say they have done it and some say that the computer wont react quick enough and add the extra fuel.

 

you don't want to spray anyting on your maf. it is heated and can cause it to burn out.

 

A WET kit injectes fuel and nitrous throught the n2o nozzles after the MAF.

The only reason to spray before the MAF is a DRY kit. On that, the nitrous is injected before the MAF and the computer senses the density (or whatever) and compensates by bumping up the fuel pressure and/or lengthening the injector pulsewidth. The fuel is added through the stock or modified fuel system.

If you sprayed WET before the MAF you could mess up your MAF or end up running way too rich.


How slow do you think the computer is for normal use??. . . The MAF and computer are quite accurate. W/ a dry kit I could see leaving the stock MAF screen on. Given density differances in different areas of the intake bellows. What hits the MAF might not be an accurate fraction of what is actually bieng sprayed into the engine. -Hence the pickyness of the nozzle locations in the DRY kit.

I have NEVER heard this before. Granted I would not even use gas to clean the crap off my MAF.

 

What type of kit do you have? As mentioned above, you don't want to spray any type of kit before the MAF for the stated reasons.

 

For optimum performance, you want to locate the nozzles within 6" or so of the TB. Too far back will reduce power as the density of the nitrous reduces as the gas is allowed to further expand from the heat.

 

never ever before

 

The LS1 dry kits from NOS spray through the MAF sensor, and don't "burn them out". They work very well. Buddy of mine was running mid-10's on the NOS kit, stock bottom end. There used to be at least one person here who sprayed a dry kit through an LT1 MAF, and **claimed** he had no problems. I personally wouldn't do it, but it isn't as outlandish idea with a DRY as many would have us believe. It would take some experimenting with a DRY kit. Agree.... WET kit would screw up the heat transfer through the MAF sensing elements, and render it non-functional.

When NOS brought out the DRY kit for the LS1's, they claimed it was only possible to spray through the MAF because the LS1 PCM has a significantly higher processing speed than the LT1.

Bottom line though.... don't spray a WET kit through the MAF.

 

At WOT the MAF is not used anyway.

 

let me clarify myself, you do not want to spray directly at a maf. the ls1 kits i have used sprayed into the box a couple inches before the maf but not at it. lt1 kits spray after the maf. mafs are very sensitive and are easily damaged, i would not try it.

lt1s do not use maf at wot, but some of the ls1 newer computers lean on them slightly. they will not make huge changes but can be swayed.

 

thanks for the information, I'll spray after MAF.

 

there is a guy i have read some of his replys that i believe sells nos stuff. he sounds very intelligent and could probably clarify any questions. i like to call directly to the manufacturers. with my job i need to know 100% before i break someones $75000 dollar car. i would hate to see you destry an engine over something simple. good luck

 

The MAF sensor is used at WOT to measure the mass-air flow. The PCM does not switch to speed-density when you go WOT.