Well I have recently installed my Intense Stage 4 kit with the 2.5" pulley with my current mods, my welded on 2.5" magnaflow muffler and my Injen Intake. I have some good news and bad news.

The good news is that my car made 275.2 whp @6,066 RPM and 256.7 wtq@5,119 RPM on a Mustang Dyno. Which is exactly what Intense advertised.

The bad news is that on my second pull my car went SUPER lean between 5,000 and 5,500 rpm's and at other spots in the rpm band. I was having some problems with 5 to 6 degrees of kr in about that same rpm range so I was pretty damn worried.

So then I thought to take the piece of ****, non fitting ******* Injen Intake off. So now the car makes 2 pounds less of boost but on my first run I saw a max kr of about 2.4, which was way better. The second run I logged total timing and kr and I saw 18.5 degrees total advanced and about 4 kr. Keep in mind the engine coolant and intercooler were pretty warm. Not sure what IAT2 was but my engine coolant was right at 200 degrees....lol.

Here is the graph that I plan on e-mailing Todd at Intense.



Ambient temperature was 94 degrees close to sea level. Pretty sure boost was about 20 psi or better.

Here is the graph of my first dyno run. Notice the spikes in AFR here as well.



Basically I think a big part of it is the Injen Intake. Todd told me on the phone that our cars actually make a little better power with the stock intake because of the Mass Air Flow Meter placement. The factory one is basically perfect as far as position goes. I think I am going to be purchasing the Cobalt Addiction intake, which actually requires you to "modify" your stock intake housing so that you keep the same mass air flow placement and still get a nice large 3" piping and the 2 extra pounds of boost.

It's also a possibility that the tune is just way off as I see it very hard to believe that an intake can cause a car to run an AFR of 21:1+....

Thoughts?

Later,
Vince.

 

I would put money on it being more of a bump in the tune.

I have GM stage2 w/ Intense 2.8" and an AEM, SCDyne header, Flowmaster 40 series welded in. I took the AEM out to see what stock would be like and the WEGO A/F ratio with and with out were not much different. As well as the KR on the Aeroforce. I put the AEM back in, the numbers pretty much stayed the same and it woke the car back up. With the stock airbox on it was kind of flat compared to with the AEM. I can honestly say I could feel it in the assometer putting the AEM back in.

Which is why I am of the opinion your issue is mostly tune related.

 

I have the INTENSE Stage 4 w/2.5". I'm having problems with mine and trying to figure it out. What was the temp outside, how much boost are you seeing, what altitude you at?

mine is:
Outside Temp 100*F
Boost 16psi
Altitude 2400 ft
WHP 230

 

the kit is not tuned for an intake or exhaust....

 

i have just exhaust and my A/F is right at 12.3 with a 2.7 pulley. Im afraid to put on my 2.5...

 

Ambient temperature was 94 degrees close to sea level. Pretty sure boost was about 20 psi or better.

 

Okay, well I put my stock intake back in and I noticed a difference in the power and performance. It felt like that I had to push the car alot harder to get the same amount of power output.

The car seems to be alot more balanced and the kr has fallen off....now the highest it has ever gotten is 4.5 and that has only happened twice...most of the time is peaks at 2.4 momentarily and then goes back down to 0. But the place where the kr happens is still the same, in the 5,000 rpm range. I get the feeling I'm gonna have to send my ecu back in to Intense and get it reflashed or something....we'll see what Intense wants to do. It would be nice if someone with the same setup as me could give me some of their numbers so that I would have a comparison. The whole goal here is to give Intense some feedback so that they can tune better.

Later,
Vince.

 

What size injectors are you running? With that much boost, you want an A/F ratio in the high 11's. I'm running 18.5psi with a 2.7 inch pulley. The timing is set at 20 degrees, and I'm seeing zero knock retard all the way to 7k. My A/F is flat at 11.7-11.8 all the way from 4k-7k. If you study the tables in HPTuners you will see the car can change advance + or - 4 degrees depending on intake air temps you will normally see.

Seems like many tunes are lean down lower in the rpm range that I have seen dyno sheets for on this site. The secret is to make sure you have plenty of fuel on heavy throttle tip-in with FI cars. Once you start getting knock early then the car never recovers. This is intensified with more boost and timing. Mail order tunes are very hard to nail perfectly because you really want to have the car right there to tune it.

All IMO

 

I am running 60 lb/hr injectors, and autolite coper 3922 plugs, thats what came in the kit from Intense. Right now without the intake I am making about 18.5 to 19 psi.

 

damn dude.,,,, I know I talked to you last night on this but just for everyone elses knowledge... I"m runnin 60lb inj (way too much fuel 32% duty, idle problems so I'm going back to 42.5) and a 2.6 pulley afr is btwn 12.2-12.6 with 24-26 deg of timing on my aeroforce I see about 20.8 + psi and with the meth injection I get 0.0 KR all the way up to 7200 RPM.
there gotta be a section in your tune they forgot to change... either that or you spun your tires on the dyno which would take the load off the motor and cause it to lean out...

 

lol i just realized those 60# injectors were WAY overkill on my car on friday. rob jumped in it and took it down the parking lot and when he got on it i seen some darker colored smoke come out and i was like wtf.... it wasn't white, so i know it wasn't a ring or anything. on my way home i was going down the interstate and i decided to load up the cylinders to see how rich it was actually running. going 65 or so in 5th, i went wot for about 2 seconds, then downshifted to third and went wot immediately....it blew out all kinds of smoke from all the unburnt fuel

since then i decided to go back to the 42# lol and the idle surging is pissing me off, i'm pretty sure that's why it's throwing the p0300

 

I had no idle problems with my 42;s now the thing bounces and keeps pullin and adding fuel and occasionally stalls out... and with my setup and 42's I was only hitting 54% injector duty... now 32% with the 60s

 

If that's the case then why did you buy the 60 pounders? And why does intense include the 60 lb./hr injectors with their stage kits if it's supposedly way too much fuel?

Later,
Vince.

 

only 16PSI with a 2.5" sounds low to me....

 

I installed my kit today and hit 19psi..It was about 60 degress out, the AeroForce read 310hp (obviously that's not whp) and about 3-4.0 KR for a split second while accel and then went back to 0. Car pulls crazy.. this kit brought this car to life. I'm installing the water/meth kit tomorrow to keep the KR down to ZERO.. but i'm very impressed.. install was a breeze the only thing that took a lot of time was the security relearn which wasn't much but u had to wait 30minutes for it to be done.. Why would the 60lbs injectors be way too much.. the ECU controls how much fuel the car needs.. it just so happens that we have larger ones that have a long way to get maxed out.. i have no idling probelms at all.. it does jump a little but thats when i have it in reverse and don't have it too high of an rpm. That happened with the 42# as well to me.....

AND JUST TO LET EVERYONE KNOW........ I modded my airbox a while ago to be like a CAI and i haven't gotten a CEL with the Stage 2 kit or the Intense kit (so far).. i put about 50 miles on it today with the kit

 

I don';t know why they sell the 60';s with it,.,, I really don't see a need for all that fuel til over 350 whp... which I will be heading in that direction... but not immediatly... so I"ll probably toss back in my 42's til then.

 

i think the issue is not that the stock airbox is perfect just that the intense tune isn't tuned to allow for other mods. The intense kits were as I understand it tuned very specifically to maximize output in an otherwise stock ss. If they are tuned so well adding almost anything could throw off the tune. That's kinda why I am glad the GM stage kits come so damn pig rich cus that way I can add mods and when I feel I am done I will be able to do a custom tune for my car specifically.

 

Just to give everyone an update, I spoke with Todd at Intense today and they are in the process of working on a solution. I am thinking when I get my header and downpipe, my kr should go down a good bit.

Later,
Vincent.

 

What you need to understand is this, you go to a smaller pulley, it will pull more air and the pcm will see this and increase the injector p/w to compensate. Now if you have enough injector, the AFR should stay the same!

 

i have intense stage 4 tune 3" pulley, and 60 lb injectors and my car runs killer.

 

I keep hearing if you go to a 2.7 pulley or smaller, 60 pounders are a must??

 

That doesn't make any sense because Intense Stage 4 comes with a 2.7" pulley.

Anyways, came back from lunch today at work and I got a check engine light for a PO172 which is a "running too rich" code. WTF? I still have not heard anything from Intense yet. I hope they find out what is wrong soon because I know that there are other people on the site that are having the same problem I am having.

Later,
Vince.

 

Sorry to bring an old post to life, but I can't find if a solution was found or not...

Vman81, what's up with the stage 4??

 

I can honestly say that I nod my head everytime I see someone complain about a tune THEY ORDERED. When are you guys gonna understand a tune is custom to your set up and vehicle , sorry to look unprofessional but PLEASE UNDERSTAND THIS GUYS . Stop ordering tunes for extreme set-ups and get the car professionally tuned on a dyno for your set up (and some street tuning if necessary for some guys) .

 

yeah there was a fix.... his motor blew up. and he had it rebuilt with diamond forged pistons, and we are currently dialing in the tune for it (10.0:1 pistons)