Where to place the JET...Before or After MAF?? [Archive]

jaketuff

12-24-2002, 09:05 AM

Brett,

The JET should be scotchlocked to the wires that are running into the MAF Sensor. Also, it must be tapped into wires near the MAP Sensor. Do you have the directions available? Just ask if you have any other issues with the install. The wiring has always been fun to install because of the similarily colored wires.;)

Pat

bszopi

12-24-2002, 09:25 AM

I think he was refering to the nitrous jet....

In which case, it should definately be AFTER the MAF.

jaketuff

12-24-2002, 11:02 AM

Originally posted by bszopi
I think he was refering to the nitrous jet....

In which case, it should definately be AFTER the MAF.

Maybe I should sleep more... I had just answered a JET PCU thread....

JOUT

PACE

12-26-2002, 05:42 AM

If its a dry kit is should spray into the MAF....If its a wet kit is should spray right into the manifold (after MAF)....

thats cool.....the name of Dr Dre's label? After MAF.:)

bszopi

12-26-2002, 10:09 AM

I still think that is wrong. Now I'm no nitrous stud, but lets see here... A dry system means it spraying into a volume without mixing with fuel, whereas a wet system is mixed with the fuel during the spray. For a setup like ours, a wet system should require a nozzle (jet) by each injector. Otherwise, its a dry system. If you spray before the MAF, before the TB or after the TB, it is still in a volume w/o fuel. So that shouldn't matter. The reason I said after the MAF is since the MAF is a piece of electronic gear, why would you want anything but air passing through it? You are just looking for problems. And there is no reason to spray that early either. Right before (or right after) the TB is probably the best place for a dry setup.

PACE

12-26-2002, 10:23 AM

:rolleyes: The reason you want to spray a DRY kit into the MAF is so that the computer can get an accurate reading of the amount of gas (n2o or air) going into the engine so that the fuel system can adjust accordingly....If you spray a dry kit after the MAF you will run lean....No one is running a dry kit after the MAF....Not Botlfed, not sexysteve, not SPAZ.

The reason to spray a wet kit AFTER the MAF is because the fuel system does not need to change the amount of fuel it is injecting b/c you are spraying a specific amount of fuel already mixed with N20....

:thumbs:

PACE

12-26-2002, 10:25 AM

Originally posted by bszopi
For a setup like ours, a wet system should require a nozzle (jet) by each injector. Otherwise, its a dry system.

WHAT? That is called direct port injection....totally different than a wet or dry kit. all Wet means is that N20 is mixed with fuel before being injected into the engine.

Originally posted by bszopi
If you spray before the MAF, before the TB or after the TB, it is still in a volume w/o fuel.

WHAT? Not if its a wet kit!!!!!

Originally posted by bszopi
The MAF is a piece of electronic gear, why would you want anything but air passing through it? You are just looking for problems.

You really think that the computer cares if the gas passing through the MAF is N20 or air??? It just gets a reading of the amount of "whatever" gas is passing through it so that the fuel system can adjust the amount of fuel being sprayed by the injecters.

Dr_Kyle

12-26-2002, 01:25 PM

that is odd, mine is after the MAF (between the MAF and TB). I just copied the pics I've seen of it. It works fine :confused: So should I change the location?

PACE

12-26-2002, 01:51 PM

IMO, I would...b/c of the reasons stated above.....That has always been my take on it.:duh: *shrug*

...thats the only way I have ever seen it done....also seems a bit safer for the computer to be able to read how much of anything is being "forced" into the intake...always good for your car to be able to measure the amount of forced induction.

iceman

12-26-2002, 02:00 PM

Originally posted by ECAP
[Byou spray a dry kit after the MAF you will run lean....No one is running a dry kit after the MAF....Not Botlfed, not sexysteve, not SPAZ.

[/B]

gtguy and doc_kyle do.. Last time I checked Wayne was runnin a wet shot??

Anyways I was under the assumption that under WOT it doesn't really matter what's going on with the MAF...

Dr_Kyle

12-26-2002, 02:27 PM

don't most cars have the MAF integrated into the TB? If so, then what Jay was saying makes sense. Since most cars would be reading it the same way as if it were before that MAF on our cars. I didn't think it mattered, since I don't think the MAF would make much of a difference.

Botlfed ran a 125 shot before the MAF and had no problems, right? If that's the case, then it couldn't hurt to do it his way, heh. Anybody else have any thoughts?

SPAZ

12-26-2002, 03:54 PM

Tittled I have a Wet Kit. I hope this clears things up for some of you.

OneQuickGT1

12-26-2002, 04:34 PM

Can anyone give me a sure answer?? My thought was to place it after the MAF, but I could be wrong.

Thanks,
Brett

PACE

12-27-2002, 05:32 AM

Originally posted by SPAZ
Tittled I have a Wet Kit. I hope this clears things up for some of you.

thought you has a dry kit....ok.........The point I was making was placement...not who has what. I guess I was off-topic.

Originally posted by OneQuickGT1
Can anyone give me a sure answer?? My thought was to place it after the MAF, but I could be wrong.

Brett

As I stated before.

WET- after MAF
Dry- Before MAF

If you need another's opinion look here.
http://www.grandamgt.com/forum/showthread.php?s=&threadid=6770

SPAZ

12-27-2002, 03:16 PM

Quote:

--------------------------------------------------------------------------------
Originally posted by SPAZ
Tittled I have a Wet Kit. I hope this clears things up for some of you.
--------------------------------------------------------------------------------

thought you has a dry kit....ok.........The point I was making was placement...not who has what. I guess I was off-topic.

Obviously you know your nitrous systems, I was tring to clear things up for other people.
No you weren't off topic, just stop thinking everyone is a smart ass, to you, and you might find peace with your inner self young jetti...;)

PACE

12-28-2002, 05:41 AM

***ZEN***:o
:thumbs:

Dr_Kyle

12-28-2002, 11:13 AM

okay, I moved my jet to before the MAF, and now I get less of a kick when I spray. What the heck? It could be because it was so cold out last night (thus making the bottle cold). I am going to try it again this afternoon when its warmer out.

GTPguy99

12-29-2002, 10:38 PM

well kyle i put a email into NOS tech support to see what they say so as soon as i hear back ill let ya know :)

Dr_Kyle

12-29-2002, 11:46 PM

awesome, thank you! I want to get this sorted out before I up the shot to 75. :thumbs:

Dr_Kyle

01-04-2003, 01:00 PM

Originally posted by gtguy
well kyle i put a email into NOS tech support to see what they say so as soon as i hear back ill let ya know :)

did you ever hear back? I put my 75 shot jet back in and I'd like to make sure before I run with it

Craig99SE2

01-04-2003, 01:16 PM

FWIW - Zex recommends after MAF and at least 6" from TB.

GTPguy99

01-04-2003, 07:30 PM

Originally posted by Dr_Kyle

did you ever hear back? I put my 75 shot jet back in and I'd like to make sure before I run with it

nope sorry nothing yet. :(

Dr_Kyle

01-05-2003, 02:57 AM

Originally posted by Craig99SE2
FWIW - Zex recommends after MAF and at least 6" from TB.

Hmm, that is interesting. I remember Wayne had his set up like that too. I would imagine ZEX knows what they are talking about with this stuff too. Some people say before, some after. I doubt there are any major differences in the zex vs. nos systems. I'd be curious to hear what NOS tech support has to say about this.

Dr_Kyle

01-11-2003, 03:50 PM

Hey Chris, I went to the NOS tech support page and they said that they had a big email server problem and many emails were deleted recently. I went ahead and sent them an email with a small diagram to show our specific setup. I will keep everybody posted. :thumbs:

Dr_Kyle

01-16-2003, 07:22 PM

According to NOS Technical Support, the jet should be placed AFTER the MAF, not before.

GrandAmGTinKC

01-28-2003, 10:52 AM

i have a 75 Wet shot on my Grand am and she loves it, ran a best of 14.9 on a good day, well back to the subject, the JET should be AFTER the MAF you don't want to freeze the sensors in the MAF do you?, i had mine right after the MAF and aftualy on my car a 98 GAGT 3.1 v6 i just simply unhooked the hose going to the back of the valve cover that gets fresh air for the oil system and I put the JET in there I had a Nitrous Express System and 75 WET shot, the NOS kit could be different and same as the ZEX kit, but I put it after the MAF and about 4" in front of the Throttle Body....

She LOVES it!!!!