So I'm having some SRI trouble. I've chosen the SRI but I'm getting extremely aggravated with the information I'm being given in regards to dyno tuning. Research shows that it's necessary to dyno but I've stumbled upon other info that states that it's not so necessary. I've gone the extra mile of personally asking people who build monster engines (non of which included a maxima drag car) what they believed based on experience and I've recieved the same responses from those people regarding the dyno. So this leads me here, my last resort, to my fellow .org members. Our engines are most definitley different from all others! Does anyone have any information regarding this? Im not trying to build a monster machine. Just something thats faster than the average Maxima. I also am NOT trying to run lean or rich. HELP!!

 

You can drive it untuned, a lot of people do it. For most power it's always good to optimize the setup.

 

Just install it then.....and dyno it b4 and after!

 

 

I was thinking about it but $300+ for a dyno for just an SRI is a bit much to me. If I were to do a dyno I would definitely get an ECU and headers along with the SRI. I was thinking about just getting the SRI and just dyno if I run rich or lean. I do understand that in order to get the most out of any in take then a tune it but I'm just not opting to do that just yet, unless I have to.

 

Absolutely I agree 100%, but this project is going to have to be a slow one as I have a baby on the way and I have to scrape my project money together, providing that it doesn't affect my family in any way.

 

I just installed my custom SRI last week and have been running untuned and I notice decent gains and haven't had any problems, I'd save your dyno money for your kid.

 

Thanks to you and Moncef! Some personal experience with a Maxima and an SRI is just what I asked for! Not saying the other information wasn't useful, just that you guys helped me greatly with what I needed.

 

Congrats man. My daughter is just a couple weeks away so I feel where your coming from.

As far as the intake goes, just throw it on and call it a day. You will feel a slight gain in HP but your a/f will not change drastically enough to cause an unsafe situation.

 

#1 Nice! That sounds great I'll buy the intake and throw it on ASAP
#2 Happy to know my A/F will NOT be affected greatly
#3 Thanks man I'm so excited I can't wait for my child, dont know what I'm having just yet but that's ok and BTW congrats to you as well, I'm sure you and your family will go far together

 

No point going to a dyno with just an intake. You don't have a piggyback installed to tune it anyway. You need something to override the main ECU so you wouldn't be able to accomplish anything at a dyno. You could spend 60-80 bucks and get a baseline dyno to see what you are putting down at the wheels if you;re curious but don't expect them to add any horsepower for you

 

Agreed. It's just a SRI on a Maxima. Nothing to get all worked up about. Very minor gains, if any at all.

Lots of howl at WOT, however. Which is kind of fun the first time you experience it.

 

 

Yea I had kind of established the ECU business within the thread, but thanks for the info on the baseline dyno I had no idea I could do that seeing as how NOT ONE perfomance shop in my area informed me that I had this option, and believe me I asked about dyno options.. Florida = Lazy F*****s


Added info >> Oh and BTW I called Universal Nissan and I was told by one of their representatives that ECU A/F tuning is available.. how true this is I don't know.. this was about 5 months ago when I was doing research on cheap tuning

 

Went back factory intake and I love the silence..food for thought OP
My intake was setting off alarms at WOT

 

Is it THAT loud? lol

 

Unless you change the MAF housing to a different diameter, you wont be changing your AFR much.

 

There is no way that is that loud. Its absolutely not possible

 

Hmm. And I bet your puddle lights were causing highway lamps to shut off.

OP, wide-open-throttle is a noise bonanza with a SRI. I personally get off on it (emotionally speaking). But who drives WOT every time they get in the car? Seriously.

 

Basic SRI won't change enough to require a dyno/tune. If you go into the depths of MAF/housing replacement and/or custom setups such as sparks03max, then yes, you will need to add the ability to tune and adjust the AFR, possibly more.

 

^^^ Listen to this guy he knowsss, his mechanic tells him everything while he works on his car.

 

Truth. Sometimes, the best way to learn is to shut-up and listen. Food for thought.

 

Best engine cleaner available. Beat Seafoam hands down in numerous fictive, comparison tests.

 

Damn it, cowboy, you made me look up the word "fictive".

 

Rochester had to look up a word?!?

 

Yes.

 

 

I said the same thing.......

 

Negative T One, neighbor on the street behind me threw a ***** fit saying I set off his alarm every time I sped by his car.

 

With regards to Sri or not to Sri, I agree with most on the forum. To run rich or lean is not the question, the answer is do the Sri and don't worry about tuning right away. Your Addition of an Sri won't change your baseline much, real world numbers say 5 to 8 hp nominal which you probably won't see anything at the wheels do to drive line loss. you'll just hear a meaner sound. You would deff. Need to change your maf since that is the sensor that give your air volume to the ecu. Tue ecu is what is going to tell your car what it needs to do. I.e retard timing or increase timing to meet the demand for more air volume hence a/f ratio. Or then again with a child on tue way which is awesome congrats, put your toy money away for baby. You never know when a rainy day may arrive

 

 

If a GAB gives 9whp, (proven by 3 of us) and I saw an increase of 23 with just an intake and base timing adjustment, I would definitely consider an intake as a strong start.

 

I am thinking about putting the Apexi sticker on as well which should add 8-10 whp...QFT

 

Mine feels quite the opposite now. At low revs its loud, really loud, at times annoying. Between 2~5k it has an amazing howl that I love, above that I mainly hear wind noise.

 

I sincerely doubt that, but with that said SRI can get pretty loud. It's cool at first. Then you start noticing that certain people with these shiny things on their chests and lots of blinking lights on their vehicles ALWAYS notice you.


Personally I run a hybrid SRI with the Helmholtz intact. Much quieter but it still has a nice punch.

 

That's a fair point right there. Keeping the resonator in the mix should quiet down the SRI. And there are a number of people who swear it improves the efficiency of the air flow.

 

It aids in power delivery and keeps the hp curve smooth, but a straight pipe gives better peak results.

The straight pipe gives a 5200 RPM camels hump.

These are my first dynos ever.

Helmholtz intact (higher hp represents GAB mod + headers):


straight pipe, same scenario as above:



Comparison:



Same day, no tune.

That session was to compare GAB + straight pipe vs Helmholtz. Seen it on other dynos too. This proves 2 things, the power delivery comparison, and that a GAB is worth some notable whp.

 

I need to go straight pipe. The helmholtz is nice but with the way things are progressing with my motor I'd like to see the results when tossing smoothness for peak power.

 

I said that about a month ago.

I feel the same. I used to like really quiet exhaust set-ups too.


I thought, I could go ahead and deal with the camel's hump. I improved on it slightly with a little AFR conditioning.

 

And there's NmexMAX.

Mentioning the Helmholtz Resonator is as good as leaving a hot apple pie on the windowsill.

Hmm-m-m, apple pie...