rc0032 Posted June 5, 2007 Share Posted June 5, 2007 tried dialing them in but it just kept jumping around cant pin the values down. They will get idle right then the rest will come. It was very close last time Link to comment Share on other sites More sharing options...
BlackGT Posted June 5, 2007 Share Posted June 5, 2007 Ok, Here are 2 logs. I just installed the 15psi actuator, so I set the WGDC to 0 so I did not overboost. The boost pressure is similar, maybe a little higher, than when I had the regular VF39 actuator in there with a .043 pill, and 90% WGDC. I think this is all the air this turbo will push... I expected more. On to the Logs, the first one is running up through gears 2-3-4, and you can see that as soon as I shift to fourth, the dynamic advance goes all negative. The next one is a log only a couple seconds after the first, only I kept it in 4th gear, let the car slow down, and logged just a 4th gear pull---->notice there was no timing pulled (but I did not go quite as high in RPM as the first), there was actually advance added! Thanks for your help!LGT 2-3-4.pdfLGTlog4th gear.pdf Link to comment Share on other sites More sharing options...
rao Posted June 5, 2007 Author Share Posted June 5, 2007 Those logs are in metric units with bar for relative pressure? Whatever is going on there is a real problem - negative dynamic advance is NEVER a good ting, your car must feel like it falls on its face. It would be good to see actual timing. Rob   IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
BlackGT Posted June 5, 2007 Share Posted June 5, 2007 Those logs are in metric units with bar for relative pressure? Yes, metric units. 1.25 bar = 18.375 psi. Link to comment Share on other sites More sharing options...
rc0032 Posted June 5, 2007 Share Posted June 5, 2007 Yes, metric units. 1.25 bar = 18.375 psi.thanks  Why not just change it to log in Standard units? Makes life a lot easier Link to comment Share on other sites More sharing options...
rao Posted June 5, 2007 Author Share Posted June 5, 2007 thanks  Why not just change it to log in Standard units? Makes life a lot easier  How's that math go? Rob   IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
BlackGT Posted June 5, 2007 Share Posted June 5, 2007 thanks  Why not just change it to log in Standard units? Makes life a lot easier   Back to the problem at hand: my car sucks, its probably my fault because I was logging in Bar, and it would all go away if I was logging in psi. Link to comment Share on other sites More sharing options...
rao Posted June 5, 2007 Author Share Posted June 5, 2007 That's sounds about right  Something is very wrong, that much we know for sure. Have you altered the dynamic advance table? Note that the Dynamic advance is falling through 3rd gear, maybe you should test your thermocouple The most obvious cause is that the charge is being heated too much. Rob   IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
SeeeeeYa Posted June 5, 2007 Share Posted June 5, 2007 RC0032 Load is relative people....  MAF g/s)/rpm*60=Load, therefore, it is dependent on your MAF calibrations. If you have other than stock MAF calibrations, i.e., aftermarket intake or altered stock, your 'load' will reflect those variations. It is my opinion that so-called 'tunes' for some CAI systems are actually marketing tools in that they have arbitrary OL MAF changes that artificially inflate "Load" numbers, leading people to believe they have gotten MORE POWER from said intake and tune when in fact they have not. Later, these skewed calibrations will come back to bite. Another $0.02 fare for the train to perdition Link to comment Share on other sites More sharing options...
rc0032 Posted June 5, 2007 Share Posted June 5, 2007 Hey I said load was relative  rao w/ a VF40 18g makes more load than I do with a 20g is he making more mAd p0w3r? Probably Link to comment Share on other sites More sharing options...
BlackGT Posted June 5, 2007 Share Posted June 5, 2007 That's sounds about right  Something is very wrong, that much we know for sure. Have you altered the dynamic advance table? Note that the Dynamic advance is falling through 3rd gear, maybe you should test your thermocouple The most obvious cause is that the charge is being heated too much. I have a stock intake, I have not altered any of the maps from the Cobb stage 2 91 octane map, except for the WGDC and I richened up the fuel at 2.5 load and higher. Link to comment Share on other sites More sharing options...
SeeeeeYa Posted June 5, 2007 Share Posted June 5, 2007 Hey I said load was relative  fixored Link to comment Share on other sites More sharing options...
rc0032 Posted June 5, 2007 Share Posted June 5, 2007 Dont worry I was just happy I was right Link to comment Share on other sites More sharing options...
Christian. Posted June 5, 2007 Share Posted June 5, 2007 I've been tuning for the past few weeks with ST, and I've got a few questions, would appreciate it if you guys can help out. Car: 2005 LGT M/T, VF39 with LGT fitment and Perrin LGT TMIC. HFC in the COBB downpipe, SPT exhaust. 1) With my VF39, I can't get the boost higher than 17.5psi tapering to 16psi, even taking the WGDC's up to 95 percent, and making the bleeder (pill) smaller. I have a 15psi actuator I am going to try next, but I think I have seen people tuned to 20 psi on a stock VF39 actuator. I would suggest you run an EBCS that is a 3-port so you can use it in interrupt mode, something like the Prodrive EBCS. 2) For ignition tables I'm running Cobb stg 2 91 oct tables, but I Always run 93 octane fuel. I see a good amount of dynamic advance added in first, second, and third gears, but then as soon as I shift to fourth, I see 5.5-7 degrees of timing removed!!!, even on cool days (shown as negative number). So my log goes from dynamic advance added in the top of third gear, to retarded only 0.2 seconds later. Anybody else ever have this and what do you think the issue is? Did the ECU see some knock during the shift to fourth? It happens every time. thanks! I have noticed that if you shift too quickly the ECU removes timing. I know of a very predominant tuner running a very high HP Subaru who insists that shifting slowly gives him the best ET. Whenever he tries to shift quickly the car slows down. Take care, Christian. Link to comment Share on other sites More sharing options...
BlackGT Posted June 5, 2007 Share Posted June 5, 2007 As much as I don't like that answer Christian, it makes a lot of sense as to what I am seeing. The 3-4 shift is the easiest one to execute quickly, so quickly, it seems, that the Subaru ECU gets pissed off. I will log again tonight with more civilized shifting. If you are still tuned in, what is target boost for a Cobb stage 2 WRX STi? XX tapering to XX ? And how much base timing at 2.5 load and 6000 RPM? thanks for chiming in! Link to comment Share on other sites More sharing options...
rao Posted June 5, 2007 Author Share Posted June 5, 2007 Why not try a log in 4th gear from the beginning? That will tell you quickly if it is the shift that is causing the problem. Rob   IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
Christian. Posted June 5, 2007 Share Posted June 5, 2007 As much as I don't like that answer Christian, it makes a lot of sense as to what I am seeing. The 3-4 shift is the easiest one to execute quickly, so quickly, it seems, that the Subaru ECU gets pissed off. I will log again tonight with more civilized shifting. If you are still tuned in, what is target boost for a Cobb stage 2 WRX STi? XX tapering to XX ? And how much base timing at 2.5 load and 6000 RPM? thanks for chiming in! You have to remember that the stock ECU is an ECU which was engineered for emissions regulations, street driving, etc. The stock ECU is not a motorsports ECU and your engine cannot easily handle the environment of serious racing, so we have to work within certain parameters. As far as how much boost, the best place to look for that information is to review our map notes which can be found from this link. Remember that vehicles will target certain boost levels because their intercooler system is capable of dissipating the heat generated by the turbo as to where the LGT intercooler is a compromised set-up IMO. As far as how much ignition advance...it all depends on how much engine load is being generated. Please take into account that the engine load calculations of the LGT are entirely different that the STi and that it is my opinion that the stock LGT load (fuel & ignition) calculations are a little off when trying to compare apples to oranges. Take care, Christian. Link to comment Share on other sites More sharing options...
BlackGT Posted June 6, 2007 Share Posted June 6, 2007 Why not try a log in 4th gear from the beginning? That will tell you quickly if it is the shift that is causing the problem. I did log a 4th gear roll-on back in post #227. Maybe you did not understand because it spoke metric.... I made about 3 runs yesterday using a more sedate 3-4 shift, and no more pulled timing!!! YAY! Moral of the story: shift slower to go faster. Thanks! Link to comment Share on other sites More sharing options...
rao Posted June 6, 2007 Author Share Posted June 6, 2007 The metric thing did throw me off  If it were my car I would figure out what was happening and fix it. Rob   IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
BlackGT Posted June 6, 2007 Share Posted June 6, 2007 The metric thing did throw me off  If it were my car I would figure out what was happening and fix it. It IS your car, it is present in all Subaru's. Link to comment Share on other sites More sharing options...
rao Posted June 6, 2007 Author Share Posted June 6, 2007 Not in mine Rob   IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
BlackGT Posted June 6, 2007 Share Posted June 6, 2007 Not in mine  Ahhh, I see. Link to comment Share on other sites More sharing options...
BlackGT Posted June 12, 2007 Share Posted June 12, 2007 3rd gear shifting to 4th log attached. It is warmer out now, and it seems that the load has increased. WGDC is very low since I have a 15psi actuator on the VF39.3rd_gear_log.pdf Link to comment Share on other sites More sharing options...
rc0032 Posted June 12, 2007 Share Posted June 12, 2007 Copy and past your DA table.  Log Turbo Dynamics  Also whats the question? Link to comment Share on other sites More sharing options...
bugblatterbeast Posted June 12, 2007 Share Posted June 12, 2007 might want to add a WBO2 trace to the log. The stock sensor trace is saturated so there's no telling exactly how rich the car is running Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now