I commented earlier about a delay in the turbo response to a floor boarded throttle while at 30 to 40 mph.
Yesterday I noticed that with the Trifecta activated the delay is almost a second, but with the Trifecta disabled the delay is less obvious and much shorter.
With the Trifecta disabled there is less than1/2 second delay until you are gently pushed back in the seat and the engine accelerates smoothly.
With the Trifecta engaged there is a 1 second delay and then you are slammed back in the seat as the engine screams to life.
Is this a Trifecta problem or an exhaust problem?:willy:
Shouldn't be a tune problem - my Trifecta tuned car doesn't do that.
Could be a sensor or something. That sort of issue can be a real pain to track down.
IDK if these K04s are prone to wastegate insufficiencies like the K04 on my mazdaspeed 3 was, but it sounds like you are probably flooring it somewhere in the higher-efficiency area of the turbo.
Depending on the size of the wastegate doing this can cause temporary overboosting situations. This is typically safe at stock boost levels and especially in vehicles with known fueling overhead, so GM possibly did not care when designing the stock tune because the car is perfectly capable of handling these temporary circumstances, and it makes it feel faster to have better throttle response in the turbo's high-efficiency airflow area.
There is what's known as normalized mapping with regards to accelerator pedal vs throttle position relationship. This is a way to "smooth" rapid changes in demanded engine loads by producing a variable intermediate table with corrected targeted values for the throttle body. It's a great way to prevent temporary overboosting by delaying abrupt changes in targeted engine loads. I could totally see Trifecta implementing something like this as a system of protection since it's working at higher boost levels. Just speculation here. If you've tried reflashing it or however trifecta works and the behavior persists, it's possible it was intentional. There is an alternative if you wanna play with HPTuners, but they were jerks to me when their handset burned 2 extra credits for no reason. I try not to promote them since they were totally fine with the fact their product glitched and cost me money in the process. I guess they are well aware of their market share lead on this platform. Anyway that's the only alternative if you really want to get your hands dirty.
Weird. I haven't installed my Trifecta yet seeing as we still have snow and my car is under cover. I'll keep this in mind for the spring and see if I observe the same thing.
Depending on how Trifecta setup the Wastegate Duty Cycle Correction, this could 100% be tune related
and considering the way you tested it, I would say it is.
In HPT you would look at this variable under the Engine section of the tune on the Turbocharger tab
Not really sure why everyone is looking at the tune, do these cars have a normal lag as Blue describes? I have never heard of such thing, so I am thinking there is something a miss with the vehicle, the tune may just be exaggerating it.
All turbos have some lag; generally on the LNF it isn't noticeable unless you go to a larger turbo, and even then it doesn't seem to be much of an issue.
The OP is saying that he gets 1/2 second difference in onset of acceleration, which isn't a lot, but I never noticed that difference in either my canned Trifecta tune or custom one (with modified turbo).
If the OP has the regular canned tune, I don't know what the answer is. If he has a custom tune, then Elff may be right and it needs optimizing for his engine set up. Thing to do is ask Trifecta or whoever sold the tune.
I assume it is an older tune as I don't believe they still sell a switchable tune any more.
Yes, installed last summer.My question was as someone said, will the tune amplify the Lag. If not, then I have TWO problems, Turbo Lag AND the Tune. If it will then I only have ONE problem, Turbo Lag, and Tune is just doing what is expected. Getting warmer so I am getting back into this.:willy:
Yea, that will help a ton. Just need to record your MAF reading, RPM, vehicle speed, MAP 1 and MAP2 if they can both be logged...O2 as Actual AFR, Intake Air Temp (IAT)...and I think there are two of these too...you'd want both, coolant temp, Throttle Position...both pedal and throttle plate...Timing, commanded AFR...trying to think what else you may want to log.
Anyone know of Windows 10, Laptop runable software, preferably FREE, that will record from a Bluetooth OBDII reader and put it into a 10 line (each a different color) on an XY graph with "X" being amplitude and "Y" being time. Graphic "meters" are too hard to read and sync.
Or that will run on Samsung SIII telephone and I can later port to my laptop
I am not sure if the free version of Torque for the android can gather that information.
HPT Scanner is free and can log what you need, problem is, the hardware that connects your car to HPT Scanner is not free
This is why I do not like Trifecta. You are blind in situations like this.
I have a 10.4K baud Blue tooth OBDII reader, is that fast enough? I got it on EBay from China for $3 delivered. I also have Torque basic but if the upgrade is only $5 thats ok. :willy:
That's what I have Blue and it isn't fast enough. It works great for scanning while driving and clearing codes but recording a data log it just isn't fast enough.
I just ordered the "OBDIIlink SX", with the USB cable, which is supposed to be the newest reader. It comes with software for the PC laptop and the specs of the FREE OBDwiz software say it will record the data. Its much faster than needed at 200pids
Its only $29.99 plus shipping from ScanTool.net. AND there is a 60 day return and 3 year warranty.:smile:
I just looked closely at the pictures and I may have wasted money on the OBDLink SX. I may send it back since it has a 90day return policy. It looks identical to the cable that came with the Trifecta!!!!!! Maybe just relabeled? Same color(red) same molding marks. It looks identical except for the stick on label.
When the new Scantool cable and software comes in I will see if the software will work with the Trifecta cable. If it does then a Trifecta owner will only need the FREE OBDwiz software to activate the OBD function.
Of course, someone wanting to sell you an overpriced cable would claim theirs was "different".....LOL The cable is held together with screws. I will be able to open it and examine it. I have a scope, ohm meter etc so should be able to decode the differences...if any...and perhaps either one can be switched to the other with just a switch.
But first I will just try them and see if they work. If so, no need to open them up.
Got the Scantool and have been unable to use it because of the very poor customer support. I was first referred to a user net. What, no tech department? Apparently not. Then on that user net I asked the question about the two error messages I get while trying to install the downloaded software and was told that was a Widows problem and referred to a UTube site for advice. Here is the post I sent to them after going to that site: "This is insane. The URL you provided goes to a UTube of a 6 year old child trying to explain a computer procedure for renaming folders, which I tried, and did not work. I did not think that was how the tech department of a business, highly recommended business at that, would work. I spent good money on a product that was highly recommended in the automotive world and you DONT HAVE A TECH DEPARTMENT? Seriously?" I definitely DO NOT RECOMMEND this product.:frown::frown:
Yes, but luckily I am computer literate and from a few clues in that video I determined it was a need to reset permissions in windows. I shudder to think what would have happened to a car nut with NO computer savvy.
So I searched for Win 10 error 2503 (one of the two errors I was having) and found a very poorly written, but usable, instruction set for resetting that ONE. It took some sleuthing but I finally was finished and as it turned out, the cure for one error was also the cure for the second error.
Now to see if the two cables are the same. I think they are. At least, the Trifcta cable seems to be able to monitor OBDII. I havent tried it on the car yet, but it sets up correctly.
The ODDII cable also seems to work with the Trifects software and detects that the cable is not connected to the car.
The two cable housings are clear with a red tint and I can see fairly clearly and dont see any differences in the components. Of course there could be a firmware chip that is differently programmed for the two, but, I really doubt it since both are dependant on software in your laptop, not on onboard firmware.
I will try to program the car using the OBDII software and will try to monitor the OBDII interface using the Trifecta cable. If both work, people that have either of the softwares could save on cables by only buying ONE cable. :cheers:
So I searched for Win 10 error 2503 (one of the two errors I was having) and found a very poorly written, but usable, instruction set for resetting that ONE. It took some sleuthing but I finally was finished and as it turned out, the cure for one error was also the cure for the second error.
Funny how that works out when it comes to car stuff too. LOL
Now to see if the two cables are the same. I think they are. At least, the Trifcta cable seems to be able to monitor OBDII. I havent tried it on the car yet, but it sets up correctly.
The ODDII cable also seems to work with the Trifects software and detects that the cable is not connected to the car.
The two cable housings are clear with a red tint and I can see fairly clearly and dont see any differences in the components. Of course there could be a firmware chip that is differently programmed for the two, but, I really doubt it since both are dependant on software in your laptop, not on onboard firmware.
I will try to program the car using the OBDII software and will try to monitor the OBDII interface using the Trifecta cable. If both work, people that have either of the softwares could save on cables by only buying ONE cable. :cheers:
This has NOTHING to do with which is better, Trifecta or HP.
The Trifecta workes perfectly.
What we are talking about here is whether the Trifecta cord could be used with the OBDII software. Maybe one more reason to use Trifecta, it gives you a cord that can be used elsewhere....ooops....??:willy:
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Saturn Sky Forum
727.7K posts
28K members
Since 2004
A forum community dedicated to Saturn Sky owners and enthusiasts. Come join the discussion about performance, modifications, upgrades, classifieds, troubleshooting, maintenance, and more!