I have an upsolute flash and that is it. At least that is what I was told when I bought it..........

I see 1.1 to 1.2 bar in 2nd gear all the time and have seen 1.3 for brief moments. Should I be getting this kind of boost in that low of a gear? The dv's are black but I haven't gotten back there yet to actually look at them to see if they are stock or not. Haven't checked wastegates either but do not have the K24 intercoolers [car is NON X-50]. From what I have read, I should not be seeing 1.2 until 4th, maybe 3rd gear.

Is it normal to see 1.2 in 2nd gear with a stock car except for the upsolute?

Thanks!

 

I would say that is quite possible. The reason folks want you to recoed what boost you get in 3rd and 4th at WOT is that is the closest to being your actual boost ...without spurious spikes and such. I assume you are not throwing any codes (do you have a code reader?)...the problem is going to be that you get maxed out (hp wise) about 1.1 with K16s...but no harm.

 

Thanks. No codes.

Here's part 2 of my question and it goes directly with your statement of "maxed out hp wise at about 1.1".....Does that mean that I will NOT see a hp gain w/ an exhaust system?

I really do not understand the physics of how it all works together i.e. is boost, other variables and hp, so please excuse my ignorance....

So, if a guy has the 16's and they can only make so much air, can one NOT gain hp from other areas like exhaust because there is always a finite amount of air that a 16 can force into the chambers and that in itself limits the hp, no matter what else is done?

Again, I truly don't understand. any help/clarification is appreciated- this is NOT intended to be a smart-*** remark.

Thanks again!

 

Let's see where to begin...you do understand that the power comes from converting the fuel into energy through combustion (hopefully you have a basic understanding of thermodynamics, CoE and Entropy...so I won't go there). The turbo charger increases the mass of oxygen and fuel entering the system thus increasing the ability to produce usable energy. The keys here being combustion is a function of oxygen and fuel. Now there are a number of factors that effect the efficiency of the combustion...density of air, octane of fuel, quality of materials, timing, etc.and temperature of air...since a turbo charger uses the wasted energy of the exhaust to increase the mass of oxygen in the combustion chamber...its temperature(charge temperature) must be conditioned (hence intercoolers)...as the temperature of the air rises it makes combustion less efficient(volumetric efficiency). The K16s reach their limits at about 1.1 bar as they heat soak and no longer are capable of pushing that mass of air efficiently.

Now about exhaust and intake...these, of course, are components to the air flow...increasing the availability of cold air in (intakes) and reducing the amount of back pressure (exhaust) allowing hot air to flow out will help the efficiency thus increasing energy.

Boost is not the only thing that "makes hp". So you may see gains in the overall system if you provide for better air flow and manage the boost appropriately.

Now for some coffee...

 

Thanks again. I do understand how a combustion engine works and the topical "way" a turbocharger functions. I guess I am asking if, at 1.1 bar, the air entering the combustion chamber is as dense as it can be given the volume restrictions of a 16, and therefore anything else you do to ease or unrestrict flow i.e. exhaust, would still bring us around to the same finite fact. That would be at 1.1, you are shoving as much dense air into the chamber and that fact unto itself limits hp. Air and fuel, right? If the amount of air is maxed out, there is your limit, no?

Or, with a less restrictive flow of air, would it be possible to make that air cooler and thus more dense, resulting in more fuel and more hp? It seems you are saying that through increased efficiency one can make more hp. Is it because hp is wasted via heat and if the system is more efficient, it is by definition cooler?

Just trying to get it straight in my head. Aways great to learn things one does not fully understand. Thanks again for your explanations and patience.

 

You have to be able to get the air out as well as forcing it in. You could be boosting 1.1 but not fully scavenging all the old combustion from the cylinders (due to backpressure), therefore the cylinders will not be able to accept 100% of their potential volume. It's kinda like traffic on the freeway, the cars in back are capable of going 65mph, but the cars at the front are only doing 35 and holding everybody up. Even if a 1000hp Bugatti at the back of the pack pushed forward at full throttle he wouldn't get anywhere... the Bugatti is your 1.1 boost, and the traffic is your stock exhaust.

Getting a better flowing exhaust will decrease the back pressure and allow the 1.1 charge of air to more effectively fill the cylinders with a viable fuel/air charge that will make more power. Additionally, your turbos will spool sooner giving you a more broad power delivery.

 

I wish I was seeing 1.1 bar with my Upsolute and K16's. I'm only seeing .8/.9 bar max during the day (if its at night when its like 77 I've seen 1.0 bar in 3rd). Damn Houston weather.

 

Well since were on the topic, and there seems to be a much more knowledgeable turbo person than I am or claim to be maybe you can answer a question for me. I have a 2002 GT2 with 3000 miles I bought brand new, I had proto tech out of Ft lauderdale do the computer and air cleaner and headers and muffler, I have since removed muffler and replaced with stock because I couldn't handle the drone. With both mufflers I make a maximum of 1.0 bar, what would an educated guess of horsepower be? I was told by proto tech 560 with muffler 540 without, does that sound credible? Is 1 bar good, bad, average?
thanks

 

one other thing people fail to realize - THE STOCK BOOST GAUGE IS BEYON SH**. it's not accurate by any means in either measurement nor updates.

get a real boost gauge and then measure your boost.

- chuck