I am making one more thread. The car has a 1.4 bar tune.

Meth Injection and All Bolt ons, upgraded Plenum, 18g.


Holding 1.5 Bar above 5000k as if it was a 1.5 bar tune, specifically see it in 3,4,5.


Checked all the N75 Valve hoses, they are on fine, including the ones on the waste gates.

I did recently put on the 1 Bar AMS waste gates a few months ago and I would see 1.5 Bar but one of the hoses was off the N75 that seemed to prove the over boosting. Not sure where else to go or think and maybe just see it as normal.

 

probably yes...
but make sure yo log your car and don't get too comfortable running that much boost...
WGs should be tuned as well not just put them on.. they also need to be se tup right...
be careful

 

Plus 1. I dont remember seeing a boost gauge in your car other then the dash one. 1.5 is all the dash will read. You sure Tony did a 1.4 bar tune on your car? 1.4 bar tune on 18g/24 with injectors/ fuel pump and meth. Hmm.

 

+1 +1. I only ran 1.2-1.3 on pump/meth with my 18g's...I would spike 1.4 in cold weather, but wouldn't hold that...and yes, gauge maxes out at 1.5...you could be running 2.5 bar for all you know...stop driving and start logging...

 

This thread is making to much sense.. Insert wheels, tires or exhaust somewhere...

 

...and probably should mention that it is the tuners fault for the OP's hardware issue...just to make it a well rounded thread...

 

2nd thread same answers what he needs is that amazing new i-phone app that lets him read all those ft #'s in real time lol

 

100% yes. I've got an EPL Alpha 28/Injector package and in the warmer months I top out at 1.4 bar (I always run 100oct). This week the weather has changed and temps are in the mid 30's in the morning and I'm also seeing 1.5 bar...and it feels great.

 

Yup, seems to be doing the same thing. From my understanding the stock system can kind of "round up" aggressively so its probably still in the 1.4 bar range. Had everything boost leaked tested and what not and have no issues there.

Will data log it next week to double check the exact boost levels.

 

Your data log will be useless as the map sensor only reads 1.5 bar. If it is hitting 1.5 at 5k and holding it is not "rounding up" that means you can be running 2 bar... 2.5 bar.. 1.6 bar.. pretty much anything over 1.5. The stock hardware can not read past 1.5 bar just so it is clear. you can log to see if your afr's are good at that boost level tho.

 

I learned the hard way. Popped heads on Porsche turbos are expensive.

As Tim has already pointed out, Durametric only reads up to 1.5 bar.

And remember, 1.5 bar is more than double the factory boost. You could be

running much more and you wouldn't know it.

When you've modified a 996 to the level you have, you need a boost gauge.

 

Didn't know the dash boost readout stopped at 1.5 bar, or that the MAP sensors can't read above that. I am certain that I have seen 1.6 on the dash in third @ 5500. Car is an 05' 996tts. It has been flashed and I usually run 110 RG. I could be mistaken, so I'll have to look more carefully next time.

 

HI,Why don't you just loosen up your waste gates a tad in cold weather? ,,
Then see where you are at..

 

Please don't shoot me if I am wrong, however this is my understanding based on my knowledge of these motors.

First, you are operating in cold weather. Cold air is more dense which means you can induce more air into the combustion cylinder which means you are inducing more oxygen.

Second, you are using meth injection. Simply put: it helps prevent detonation. Substances heat up when they're compressed, and in traditional gasoline engines, detonation-or "pre-ignition"-occurs when a cylinder's air/fuel charge compresses and heats to the point of auto-ignition during the compression phase, before it can be lit at the proper time by a spark plug. If this occurs a few degrees of crank rotation in advance, the consequences may not be bad. But if it occurs farther back in the compression stroke, in high-horsepower instances, it can easily destroy an engine's internal components. Water/methanol injection systems deliver a finely atomized mist of a water/methanol mixture to an engine's cylinder charge, and as the mixture absorbs heat and vaporizes, temperatures inside the cylinder are reduced and the propensity for detonation is decreased.

While water is not combustible, it has a greater capacity to cool intake charges than methanol alone. This is why most manufactures recommend that a 1:1 mixture of meth and water be injected into your engine. Methanol also effectively increases the octane rating of fuel, giving the benefits of running higher octane levels. The evaporative effects of the water, plus the octane boost of methanol, allows your motor to run more advanced ignition timing and/or boost to create additional horsepower with proper tuning. A general rule of thumb is that an engine will output one percent more horsepower for every 10 degrees intake temperature is decreased.

Third, how is power made? It is made by fuel. The more fuel, the more power. The catch is the fuel must be mixed with oxygen to derive power.

Fourth, the 996tt ECU learns and adjusts to a certain degree. My guess is the cold air provided the extra air resulting in extra oxygen. The methane provided a higher octane which prevented your knock sensors from going off and you ECU sensing more oxygen adjusted your advance and fuel to optimize your combustion.

The result an extra approximate .1 bar of output.

 

Well...I don't think you are mistaken. I just saw 1.6 on the dash gauge twice on my drive to work in 4th at WOT. I was not imagining it. Mine is an 02' non X-50 car.