BTW, I tried the Boost Lo Res PID and it works pretty well!
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BTW, I tried the Boost Lo Res PID and it works pretty well!
can't wait to test out this new stuff. get to play with a car friday finally.
I would back off the MALT as to not enter so abruptly and harsh... Ramp it up with RPM.Quote:
Originally Posted by '09SS
This is how I run (with elevated DAL's in the 300's so I push 25-25.5 psi).
Boost comes in nice and smooth and holds.
http://www.hptuners.com/forum/attach...1&d=1303859803
the wastegate linkage is stock, i loaded the gmpp tune turbo tables back in to see if i could make it level off the psi it was spooling up to like 24 drop to 19 back up and back down with the stock 09 tables and the new turbo tables. i set the dals back to 230 in the midrange and it is better but too high 3000-5000 still gonna work the duty cycle correction table a little. i thought every one is running the dals at 255 in the right column at 100% and adjusting boost with the new tables correct? setting max pressure at 265
I raised the max pressure back up to 300 kPa and adjust the DAL's & DC Correction for third, then cut torque/gear as needed in 4th & 5th. When it bounced off the max limit I got too much oscillation on mine.
Are there still tables in the GMPP file that is not accessible?
Besides the No lift shift....
How high did u have ur DAL's to hold more than 20 psi up above 6k? Im holding 100% bd dc til redline just boost falls off hard.Quote:
Originally Posted by Iam Broke
Nvm I guess on that post, I just saw in the other thread ur log at 6500 and it was at the same boost I was. So I guess I just gotta wait to get the EFR...
You can only get so much out of our turbos. Once Boost Controller Duty Cycle is maxed out at 100% she ain't gonna do any more.
Where can I download this latest beta
Contact support.
So Chris when are we getting live tuning for the lnf?
I was able to do this with my megasquirt system and it was a cool feature on my other car! Can this be done on a oem ECU? Just wondering...Quote:
Originally Posted by cobaltssoverbooster
live tuning can't be done on these ECUs.
Hence question 8)
I'm looking at installing an LE5 throttle body in the near future, and I mainly wanted to gauge what to expect. Sorry for putting it in this thread, but I figured compiling it here where the discussion started would be ok.Quote:
Originally Posted by gmtech16450yz
Smoothness off idle sounds great, however I'm interested in how it behaves when you punch it. I know this sounds really subjective, but does it "feel" more responsive from cruising to WOT? I'm totally ready to do some DAL tuning to optimize it, but it feels like no matter what is done on the tune, there is that feeling of disconnect between flooring it and being pushed back in the seat.
Thanks for any subjective review you can offer :)
when the engine is off record the speed of the tb reaction compared to the pedal. its darn near instant. there is some sort of value or paramater in the ecu that slows to plate opening when the engine is running. we do not have control of that yet so basically the other tb will be a waste of time in my opinion. the disconnect you talk about will still be there. i think iambroke and someone else figured it out.
Honestly that completely makes sense. I was hoping to hear from someone who had actually ran the LE5 throttle body to chime in on the "feel" of it. I understand on the log the delay will still be there, but even with drive by cable, installing a larger diameter throttle body can result in the feeling of better response, even if there is very little gained in actual power. If GMtech doesn't see this maybe I'll just PM him here and on solsticeforum.Quote:
Originally Posted by cobaltssoverbooster
Hey oldskool, nice to hear from you. Damn, forgot about some of these old threads. I'd like to go back and edit out the stuff I said that I've since found out isn't accurate!
The "feel" of the LNF can be whatever you want, it's all a matter of tuning. I have mine so unless you floor it or let the revs come up it just feels like a nice, normal daily driver. Pretty cool to be able to pull that off with ~540 hp/trq. Lots of guys don't like the drive by wire, I personally love it. SO much more you can do with the throttle when it's computer controlled. As far as the delay, everyone makes such a big deal about it, it's not the reason the LNF feels "laggy". Anyone that's worked with carbs knows you don't want the throttle to go wide open instantly at low rpm's anyway. Fuel injection is the same way, you don't want to open a big hole in the intake instantly. A lot of the throttle delay can be tuned out, but believe me, it's not as big of an issue as most think.
Back to your question, if you don't touch the tune, yes, the bigger throttle body will be a little more responsive. Obviously if you increase the area of the throttle bore, when the computer opens it to say, 50%, you'll be flowing the same amount of air as the smaller tb would at say, 70%. As far as making it touchy or smooth, again, it can be tuned to be however you want. You mentioned freeway cruise, I do remember having to dial back the throttle response in those areas after putting the bigger tb on, it did make it a little more sensitive. Changing cam timing makes the freeway cruise response more sensitive by far though. If you want freeway cruise acceleration response, I'd suggest working on those tables first. Unless you're going big turbo, the throttle body isn't going to give you anything you can't get by software changes alone.
HTH.
John
Alot of dal and cam tuning? Dals made mine super sensitive so I backed them off
Quote:
Originally Posted by gmtech16450yz
Thanks gmtech, that does help - that is essentially the reveiw and info I was looking for. I've seen some of your discussions on cam tables as they relate to response and cruising economy, but I'm not ready to take the hit on mpg yet if there are other ways to sharpen up the response. FWIW, my DAL table is not much different than stock right now - the minor changes from stock are only in the 90-100% load columns. So, I'm sure there is plenty of room to adjust the lower load columns to tweak throttle response.
The situation I'm trying to adjust is the one where the car is cruising along in the range of say 2500-3000 rpm at low throttle (<<50%). Then you punch it. There is a very noticable lapse between the pedal hitting the floor and the car taking off. Everybody with an LNF has seen it, everybody's felt it. It irritates me that a car primed to be one of the most responsive turbocharged cars ever, with direct injection, variable cam timing, and a perfectly suited turbo for low end response, ends up being limited by a 1-second lag in the throttle plate opening when going from low ETC% to WOT.
For comparison, my other car used to be an M62 supercharged 2.2L eco sunfire. If you put that car in the same situation (light throttle at 2500 rpm, then punch it), the instant push put a smile on my face everytime, even though ultimately the car was not that fast (213whp at it's best). I'm not expecting that kind of "response" out of the solstice, but there has to be some improvement to be made over how it is now. I'm taking tomorrow to do some work on it, and the LE5 TB is on the list. Based on your review, I think it is a step in the right direction. :cheers: :pray:
Couple quick thoughts...
We have two cars with almost identical hp and torque, my Sky and my wife's CTS-V wagon. The wagon is a beast. Floor it at any speed and it will slam your head against the headrest. I floored it at 70mph once and knocked my wife's sunglasses off her head and into the back seat!
The Sky is fast, but not like that. It's a 2.0L turbo for heavens sake! I don't care what the throttle is doing, it's still a turbo and it's not gonna hit like a supercharged engine, no matter what the size. Guess which car is faster 60-100? The Sky (mostly because of the weight difference obviously). Drive 10 people in both cars and 9 of them are gonna swear the Caddy would blow the Sky away. It just "feels" like a top fuel dragster.
Another thing to think about and try...
When you're cruising along at 60mph, go from closed throttle to half throttle and take it up to 80mph. Do the same thing except go from closed throttle to full throttle. Look at the elapsed time differences, I'm betting you'll see they're very close. If you're at 2500 or 3000 rpm, the engine in no way needs the throttle full open to make whatever power it's capable of at that particular rpm. I've seen plenty of engines make LESS power or accelerate SLOWER when you go full throttle at low rpm as apposed to going only half throttle and then flooring it once rpm's come up. Pretty smart of those engineers that worked on our Bosch computer and software huh? The throttle "lag" everyone hates is probably doing more GOOD than harm. The guys that put together the stock ECM and programming were no dummies.
Remember, there's a computer controlling all the engine settings like fuel, ign timing, cam timing, etc, etc. Look at your timing tables and you'll see keeping the air loads and throttle positions lower at low rpm's will put you in much better timing cells than if you tell it you've got your foot to the floor.
On the cam timing/mpg thing, the timing tables I put up here over a year ago are not even close to what I use now. (I should take them down but it's kinda funny when I see so called "professional" tuners using those exact tables in their tunes! Those tables are no where near the best settings. lol.) It is possible to have better throttle response AND retain mpg with cam timing changes. Don't be afraid to just try something and see what it does to the mpg. Even if you lose a little mpg's, you might figure it's worth it.
I do appreciate the feedback, and i know that the LNF will never feel like any roots supercharged car, but i really do think there is room for improvement. I've been in cable driven throttle body cars with small-ish turbos and the response is much better. That is interesting on the CTS-V vs the sky though lol.
We'll see what the LE5 TB and some additional tuning does. Like I said, i'm sure there will be some noticeable improvement. If not, oh well, live and learn.
My tuner was always asking me why I would always ease into the throttle in 2nd gear. I swear it goes faster that way. :)Quote:
Originally Posted by gmtech16450yz
I'm going to have to agree. Roll-on throttle rocks on an LNF. Jabbing the throttle results in a lag feeling instead of a rollercoaster feeling. I don't care though. I like it for what it is. I want a daily driver that rocks when I need it. For timing, I'm at the beginning of the timing table learning curve, but I hope to reinvent the wheel, so to speak, so I can understand it rather than just cribbing someone elses tables.Quote:
Originally Posted by sstupid
soooo....how about some layering so we can run two tunes at once?! :D
i love the way trifecta has that option but apparently vince isnt the best tuner so im not getting the full potential out of my car that i can...
Dual tunes on a switch would be the best but I doubt they will take time to figure it out.
It has to go through the bcm and Chris has already stated they are only working on PCM parameters for now
never hurts to ask. :)