Looks like everyone is leaning toward not touching anything when it comes to the stock intake.

 

Like I said, most tuners can compensate for an aftermarket intake.

Al happens to have the RS figured out pretty well because of all he has dealt with.
It affects the MAF readings, but fortunately it does it consistently from car to car.

 

What kind of problems could a erratic a/f cause??

 

Here's my short story for an opposite perspective.

I have minor mods:

HKS RS Intake
3" Turboback
MBC @ 19psi
TurboTrix ECU Flash

I made 307 AWHP on a low reading Mustang Dyno this weekend. A Dynojet would have been around 320-325. Basically, I am making (XEDE) cammed car power with no cams. For reference, a UTEC cammed EVO with my bolt ons dynoed 319 AWHP this weekend also. Dynojet on that is, what, 350 AWHP?

I outrun (in fifth gear pulls - no shifting or driver error) EVOs with cams, turbobacks, etc, WITH XEDE tuned by Shiv himself. Two to be exact.

The HKS RS Intake DOES make power over the stock airbox. But if you can't tune for it then I guess it wouldn't. I have 1K dollars in my car and I have outrun 2 Vishnu cars (with cams) and outdynoed 1 Vishnu car (no cams).

So that kind of shapes my opinion of the Vishnu program especially considering these guys have at LEAST $2500 in their cars to my 1K.

Regarding the intake, before either of us had tuning, my friend and I had the EXACT same mods except he had the HKS RS. We were indeed dead even through all of fifth gear until above 5500 RPMs. Then he started to pull on me. This can only be attributed to the intake.

Just my .02.

 

I'm so confused now . I was gonna install my RS intake soon, now I'm not sure I want to. I don't live anywhere near a tuner, or a place with an AWD dyno. So, those factors make me want to install it even less after reading this thread....I won't be able to have a "master" tuner around to tune it properly. So, chances are, will it just mess up my car if I install it myself without having it tuned?

It's brand new in the box still. I may want to sell it after I think about it some more and research it some more.....

 

The HKS hard pipe doesn't fit with the stock airbox, I tried. Besides that, I think the transition from the MAFS diameter to the larger HKS pipe diameter could cause issues as well. It will cause flow separation at the walls and turbulance, however it will be post MAFS so it probably won't effect it.

I think it would help since the inside of the stock pipe is rough at the flex sections, as long as the diameter and other charecteristics of the hard pipe are held true to the stock intake, etc.

I personally wouldn't do a drop in filter for the reasons I gave above, the oil issue. The HKS drop in filter is not an oil type so it's a possibity.

As far as putting the stock airbox over an aftermarket intake? That won't really do much for you I think... A drop in would accomplish the same thing and your box will still cancel out the sound either way.

silvrevo, EVOTEXAS, yeah you can shake things up by taking the thread on this route, but I didn't intend for this to be a tuner debate, and I would really hate this thread to go that way since every thread that goes that way loses any technical value, and I say that IMHO after reading many threads that have become tuner debates. I simply wanted to state how I think the MAFS can be upset by different intake configurations and post my evidence to back this up.

- Steve

 

Lets keep this thread on topic please. Alot of info here and we dont want it to be shut

 

That's strange. The HKS hard pipe on mine fits perfectly on the stock airbox. I'm only using HKS drop in intake onto the stock airbox and the sound is a little louder than the stock air filter. No rough idle.

 

What are you guys talking about?!?!?!? This thread is about an aftermarket intake making HP or not. And since the involved tuner is Vishnu, it is also about whether of not he tunes properly for it, how much his opinion does or should matter, and what ways he makes power (with the stock airbox).

My post is PERFECTLY on topic and addresses each issue with facts. All you weiners need to stop looking for debated hidden in normal posts and accept the facts even if they don't say exactly what you want them to.

What should I have done to make you guys happy? Left out who tuned my ECU? Well, that is ommission from the correct story or body of facts. I'm not going to do that. TT flashed my ECU. That's all I said. I never said they were better. What are you guys talking about? WTF, man!!!!

 

I am using the RNR Custom CAI and my ECU was custom tuned by Al. It is one of the most solid 11.1/1 ratios hes ever tuned. His words not mine.

 

No, you never directly said it, but you did say multiple times that your car is faster than Vishnu cars with more mods, which is saying, just indirectly. And now by responding this has become exactly what I didn't want it to...

Actually, no it isn't, at least it wasn't what I was talking about. I was talking about the erratic A/F reading given by an HKS intake on a stock car. And how I thought that was a bad thing, hence why I went back to stock. I also said that tuners can compensate for the irregularities, but it is just that, a compensation. I said myself that Shiv tuned cars that day that did have aftermarket intakes, and I know that other tuners can do the same. That is not the point of my post.

Can that HKS intake flow more air than the stock airbox? I hope so considering the filter type, pipe size, etc. If you can flow more air can you make more power? Yes, I would again think so. So can the HKS intake make more power? If your car is demanding more flow than the stock airbox can provide, yes, I think it would. Do I think it's a good idea to run that intake on an untuned car? No, I don't simply because of the A/F readings. That's my opinion, call me stupid if you want.

- Steve

 

thanks for the info!! but your opinion is base on one tuner ability to tune, as some one has stated Al has tune the same intake and has had excellent success with it. Is that saying Al is a better tuner , no! but it does say that he can tune a car with an intake and keep a solid Air/fuel with no problems.
Aftermarket intakes have been an issue for peeps running Xede or Xflash from shiv, while there are other tuners like Buschur that are running a stage IV and making solild power with no problems what so ever. Or tuners like WORKS that have tune cars with APS CAI and have had success maintaining a nice 11.1 air/fuel with no problems.
Hey ! even Brainstorm has tune cars with the APS kit . which envolves CAI, Turbo back, Test pipe and APS ecu piggy back and have made near 300whp (AWD dyno jet) and had no problems with air/fuel.
Its nice information what you are posting but just like i said before because one tuner either choose it not to tune for intakes or well lets leave it at that. doesn't mean that the design behind an after market intake is not worth it or can not make more power then the stock box while running MAF.

 

Stop freaking out , No one said anything about how much you $ spent or they spent. you keep saying 1K mode vs $2.5K . The guy who started this thread is giving us great info about our cars and how they work, not on how much you spent or he did . if you read his post you will know that he is taking about A/F..

 

Superhatch, the poster right above is giving you the reason I included the info I did. It's based on ONE tuner's ability to tune. As far as erratic readings, I am not having this problem. My car is smooth and the AF ratios and other maps are not affected. I personally think that you are dealing with the wrong tuner in order to get a valid test/result/tune with an aftermarket intake. The point of MY post was to show that it is CHEAP and EASY to make power when you ditch the stock airbox with no adverse effects. The point of me including my defeats of Vishnu cars was to say that just because he has a big name, doesn't mean he always knows best. Why don't you accept other opinions instead of trusting just one dude? That's always a quick way to find yourself behind the curve. The simple fact is that other tuners make very nice and reliable gains with an intake and Shiv does not. Sometimes when it seems like everyone else is wrong, it turns out you're the one who is wrong.


edit: ok 2 posts above.

 

the thread you quoted is an exageration mocking people like you.

every fact I posted has a purpose. if you can't understand it and don't want to, then I really don't care. if you can't understand it and want to, let me know.