I would go with at least 450cc and a proper fuel system if you are going with a tune on a utec

 

The danger is running lean, not running more boost. The boost creep is due to a bad design, not physics of weather. But there is a danger of being tuned in hot humid weather and then going to cold dense air.

 

im running 380's with the PE TT kit. At around 7lbs of boost at 5000 rpm my injectors are maxing out. I would recommend 550's or so for around 400whp. I think you want your injectors running at like 80% duty cycle. Correct me if im wrong guys..

 

What should happen and what does happen are 2 different things. Id see 9psi in hot weather, at least 9.5psi almost 10psi in 40 degree coldness with my old TN set-up. Seems there are no two TN kits that are the same with boost level. Different exhaust/overboost pipe or not/etc seem to make differences in these kits. FWIW-my new set-up is the same in 35 degree cold or 90 degree heat, so I do agree with you.

 

Again, it is IMPOSSIBLE to have 9lbs of AIR weigh anything more than 9lbs. If a spring has a rate, that's the rate. temperature CAN affect the spring rate, because it makes it stiffer. That is the only way you can have "more boost" because the spring is harder to open because of cold metal, but once at operating temp that shouldn't happen, in fact, hot metal should be softer and actually drop in boost from room temp.

 

Normally I never go past 8.5 and that was consistant. Last night I thought Ide check it out. It was humid and about 70 and cool outside and I was creeping at 10psi consistantly. AFR was still 10.5 and no leaner at WOT. YIKES!!!!!

 

So I guess we can say that it is the kit's design that does this?? It seems like this is problem to some people with turbonetics kit. I still do need to figure out why my car is bogging in 6th gear.... Seems weird how much the AFR changes just by temperature.

 

My boost also creeps now. I'am hitting 10.5 wihen its cold out. I was only getting 9.5 in the summer.

 

Now the weather is getting cold... it seems like people are seeing this problem. Anyhow, my plugs are gapped at .33 and 6th gear acceleration just could have been too much for the car and flash??

 

I've asked the question before and never gotten a clear answer about the boost increase in cold weather when running on just wastegate. The best response I got was that the air is more dense when its cold and therefore it is compressed more. Again this is what I was told when I asked I'm not stating fact. Someone far more knowledgeable then me in the subject of fluid dynamics may have a better answer. I have picked up anywhere from .5 -1 PSI in temps near 30-40s but my AFR never changed.

 

I actually agree with you on this one..
.Not possible, unless your running a MAP based tune or Temperature correction settings...More boost on a MAF base tune, in theory should go leaner with the addition of more boost..

 

In theory although if the MAF is not maxed out it should be reading the increased air and be compensating for it with fuel. I'm apparentely not the only one.

And hes not the only one either. g35pm on this board is local to me and his AFR never changes either. Even when we did a late night run in 41 F weather.

 

I dynod a flat 11.5:1 in summer at 8.5psi and 9.5psi. I also dynod 11.5:1 in the florida winter (70 degrees) at 8.5 and 9.1psi. I guess my car is just that awesome.

 

Wow.. I just wish my car could get it perfect like that.

 

Anyways, here is an update.

My car feels like it is misfiring pretty bad.

The rpms would stuttering while the car would be doing that..

Sounds like I hit a very small version of rev limiter.

However, do you guys know what detonation sounds like? Or is it even

audible?

 

Yes I know what it sounds like. I've overboosted due to EBC issues and heard my car detonate. It sounds like you're running through gravel and its hitting the firewall of the car, or like many say, like someone rattling bb's in a tin can thats coming from the engine area. I guess my car isn't perfect..


I really don't have to deal with extreme cold temps, but I've driven my car in the 50 degree weather and it felt excellent. According to my wideband it was still in the mid 11's, too.

 

damn you 91 octane guys.

 

Than good news is that my car is definatly not detonating. Must be a misfire issue. Anyway I can know for sure that my car in fact misfiring?

 

You could have potentially engine damaging detonation that you cannot hear. I think it would be a bit naive to dismiss detonation because you can't hear it sitting in the driver's seat during WOT

 

Thats trues although its true of ANY turbo kit. Both the reflash and Unichip rely on the same factory knock signal to detect detonation so there is no benefit in any of them aside from the HKS Fcon V Pro with Knock Amp, UTEC, or AEM EMS (I want to say the Magnetti Marielli too ut not sure) which offer the ability to listen for knock via a head set. The bottom line is every car out there could be experiencing inaudile detonation. But then again they may not be detonating at all.