just ordered a hp tuner and it should be here within the next week. i had to break down and spend the money because with only the few mods i have my fuel/air mixture was running way to rich and causing a cylinder to misfire causing the check engine light to come on. what do i need to lean it out to?

 

replace the jet MAF with the stocker.
That's the reason you're running rich

 

that was 300 bucks and it helped. i think tuning it will be good i just dont know what to set it as

 

i sent my jet back try putting the stock screen in it the airflow will go to the outsde of the airfoil and it senses that and assumes that an equal ammount of air is going through the other side thats what gives you the false reading when i has mine on my car it felt super sluggish i would say return it if you can

 

Tests have shown over and over that our MAF's are not restrictive until you make some MAJOR power, more than 98% of any of us ever will.

But don't take our word for it. Use the search function and see for yourself...

 

I myself have experimented with the stock and Jet MAF having had the wire mesh screen in and out in both. I've never coded with any combination, but I can tell you what differences I've noticed.

Stock MAF, Screen In: This has the worst throttle response, revs are slower, and car doesn't pull as hard. Best MPG
Stock MAF, Screen Out: Throttle response better, revs improve, but still slow, and car pulls a tad bit harder.
Jet MAF, Screen In: Throttle response good, revs a lot quicker, engine feels like it has more torque, car pulls harder, MPG is down.
Jet MAF, Screen Out: Throttle response snappier, still revs quicker, engine has more torque through to midrange, engine definitely has more torque. Enough to catch and pass a 535i BMW that passed me at 60 MPH and I came back and passed him at a 108 MPH on I95 last Friday Morning without using TAPShift. I just "mashed the gas" and the engine/trans did all the work. I caught him off guard trying to find a gear to come and catch me. MPG is way down. Still no codes at all.

I'm Old School and outside of using a MSD Electronic Ignition, I'm new to this Computerized, Electronic game with cars. Still, I'm learning and getting a better understanding of how all this trick stuff works. I can tell you that the 3" high flow exhaust that you're using is what's causing you to code. It's too free flowing and doesn't have enough back pressure. You exceeded your ECM limits. You definitely need to tune. This is why I'm not installing a 3" DP/plus CAT until I myself get that HPTuner. I'm also reinstalling the Stock MAF until then, also. Don't want to burn that much petro just going back and forth to work.

There is a lot of people here that really know what they're talking about in LS1Tech and I'm listening, learning, and applying what they know and what old school tricks I know and understand to do this thing right. I'm definitely on it.

PEACE!

-beamie-

 

All you're doing with the new MAF is fooling the computer into seeing more or less air.. that's it. You can accomplish the same thing using HPTuner. I would bet you $100 that with your mods, if you got a dyno tune from someone who knew what they were doing, you would see less than a 3hp difference after tuning between an aftermarket MAF vs a stocker

 

Note- I'm not trying to bash anyone or insult anyone in any way. I'm just trying to help people save some $$$. We all want the best HP for the $, and, IMHO "performance" MAF's are a waste of money.

 

You're definitely right. I bought a lot of this stuff before I even had the car and I didn't even understand most of this until now. But, I believe in trial by fire and if I can inform anyone of my conquest and misfortunes I'm going to tell them the whole story of how I got there either way. By the way, I only had the car 4 weeks on 08/07/2008. I'm telling it as I go. You will evolve with me.

I'm just trying to be informative and help others from making the same mistakes I've made, going to make, and money I'll probably waste on the way. To tell you the truth, I'm really having fun with all of this, so I don't mind it at all.

 

yeah but with more mods they will all work together. im sure with the weiand/fast intake manifold with k&n and jet, it would have more efftect than just a h&N and weiand/fast manifold

 

This is definitely true, but tuning will still be needed. Go for it.

 

do you recommend the screen on or off with the Jet Maf, how much mileage did you lose with it off verus the power you gained?

 

there is a good chance your dp specifically is throwing your check engine light. they are notorious for it----scan it when you get hp tuners and see if it doesnt say "catalyst low efficiency"

 

I don't have exact calculation results to give you, but more real world results. I drive I95 6 days a week almost the same exact miles per day. I've been making sure I fill up the tank approximately at the 1/4 tank mark each time which according to my receipts I put in about 13.5 gallons of gas each time. I made sure that I set the Cruise Control at 60 MPH most of the time. I also use the same gas from the same gas station, Sunoco, ever since I had the car. My mother's neighbor delivers that station's gasoline so I know it's the same. It's part of his route.

With the BONE stock setup (that's with no mods, stock airbox, etc.) I was getting average of 279 miles for 3/4 of a tank worth of gas. When I just did the CAI, TBS, and MAF (without the screen) I was getting 212 miles for 3/4 of a tank worth of gas. With the screen in the MAF I was getting 225 miles on average with the same reference point.

Off idle pick-up is better with the Jet, but its strong point is in the Midrange performance. I get on it on at Bartram & Island Ave. and go to the next light, on Island Ave., with the stock configuration and make it to 85 MPH. Bartram & Island Ave. to the next light is approximately 3/5 mile going uphill and 2/5 of a mile downhill. With the aftermarket configuration I make it to about 98-100 MPH. I never get a chance to look at the RPM's, but I'll do that at some point in the near future. I still haven't used the TAPShift in the car. I know, you think I'm nuts for not using it and you're saying to yourself, "Why did he even get the car with it in it if he's not going to use it?" I didn't buy that car for that reason. Don't worry, I'll get around to using it.

Since I've put on the Magnaflow exhaust, I haven't did any type of comparison with the mileage and performance. I just been in love listening to it growl as I jump on it at every opportunity. I'll go back to comparing it next week, both with the stock MAF and the Jet MAF.

The wire temp settings in the Jet is different than stock and with the proper tuning it can still perform, but get even better gas mileage. The 'Wire Mesh Screen' straightens the air out and allows the wire to see a even flow of air, but it becomes a restriction as the air velocity increases and this is why it has lousy midrange performance, but the wire doesn't get a true air density reading without the screen. I'm only theorizing and speculating this since I don't have any measurements, but that'll be in the future too. Hardly anyone racing uses the screen and this is why Jet probably don't give you the screen with their unit. Everyday driving is different, though. I'm waiting for a reply from Jet about this.

In the mean time, I have to prepare myself to by aftermarket, performance tranny parts. I want to take this car to the track in late September and October and get some time slips on it before I start doing other work to it over the winter months. Plus, I have three grandchildren that I have to buy Christmas presents for and a wife to keep happy. Yes, I plan early for Christmas. Don't laugh. Experience has taught me better. This way I can spend the money on the car as I want and the wife won't mind. Everybody stays happy.