Rossko85
11-04-2009, 11:11 PM
Ok...well its been a lil bit since ive updated anyone....right now we have ran into some snags...one big one is that the 08s have the E67 ECU which is the same ECU GM uses for most all of its vehicles now...including the E85 cars due to the available alchohol tuning tables available...but, HP tuners doesnt offer a BAR add on upload for my ECU like they do for the 05-07 E38 ECU. So with that said, we have been working very close with HPTuners on attempting to tune this ECU...there are no files available for sharing or anything at this point for boosted LS4 or GXP...
With that said, for the most part most of the tuning is the same, just a few differences, i.e. E67 does not have a VE table...so, my tuner had to go in with a program that is new from HP and their developers that is basically a software that allows the tuner or user to take all the given values and make a virtual VE table...which makes things very very nice...giving this car something it can use now and allow it to be tuned even better low end.... Another issue we are running into is that the car wants to keep cutting out up top at or around or a lil over 4500rpm at WOT...we have turned off all the torque mgnt etc...couldnt figure it out...its pulling timing...but now showing on the tuners screen...kind of a studder...but, HP to the rescue again WE HOPE...they have a BRAND NEW BETA program they had us dump into the ECU to hopefully counter the timing/torque mangt. from pulling...they said it might work...so we will see..so working very close with them on this right now...more history in the making lol..
The bad part of this now is, that im using a 4" SLP LS7 MAF and it appears to be too choppy down low...so it throws my fuel trims way way rich..UP TOP IT IS PHANOMINAL!! so, ive relocated it to give it more air flow pre-maf to help or hopefully counter the turbulent air down low....but if that doesnt work we have decided to switch to a LS2 MAF...its still big enough to fit in my exsisting 4" intake piping and couplers w/tbolt clamps and it is screend so smoother air across the sensor down low, and its a lil smaller so should work great for that...and not loosing too much up top...so we will see....
Now..the stupid part on this...and the lil headache we have had, is this dam upstream O2!!! My first tuner with the NA/N2O and I saw that it didnt switch at all or barely at times...it was lazy...never thought anyting of it...then my boost tuner and I get to tuning and now we NEED IT...so, i go and get a Univ. Bosch and hook it up...and the dam thing still is doing the same thing...flat line down low and then lil humps with flow....so its just not switching..we tried doing the RPM bank adjustments and plenty more...and no diff...SO lol...now we decided, lets go with a direct fit plug in OE style...same what GM uses to avoid any variable at all...and of course its a DENSO...so we will see...
but with this problem...havent been able to finish the top end of this bad boy due to these problems..becuase of these issues, im running around in open loop and no maf LOL..im sorta OLSD right now, just running off of the VE table we made with the new software.....lol but im stoich right now target at 14.66...and noway for us to determine if the BETA worked due to while runnin around in OL/VE tables, the torque values are halfed...so not going to cut out up top like it did...but cant boost period under these conditions...becuase while running in OL/SD..the last value sinced by the ECU on AFR is carried into boost..and you guessed it..if I hit a 17.0-20.0...Im boosting on that AFR...IT STOPS YOU LIKE A FRIEGHT TRAIN GUYS...did it once and that was enough...tuner said...NO MORE until we get me on MAF at least...thats number one right now....
MAF should be here in two days...would of been here alot sooner if the dumb ass on here i bought it from would of shipped it over 3 weeks ago...yeah, I know..its been a ride with him too...now I have to wait for my tuner to get back from Italy...he is an electrical engineer with Delphi...and he travels...and has a family etc...and he lives 2 hours north of Indy in Lafayette where Purdue is for you with a ? above your head LOL....so just a lil tid bit there...
Walbro 255 is in and running good after we put a standard piece of line not fuel rated on the pump and the thing spliced open on us...good thing not while tuning the first day!!! but we dropped the tank for the first one...and then for the second...we did it on the fly and just cut that football shapped pre die in our trunks...you know...the one that looks like Stewie Griffin LMAO..but it was a biatch..but now you know under that is your fuel pump assembly...but Walbro 255 runs great so far...took very well with some bucket mods etc...
Still have to put in the injectors...they are 63.5lbs shorties...flow matched etc...I had them sent off, they were custom machined from FI Clinic..came out of a Z06 Vette...all the tuning here lately has been on factory injectors...we are just now getting to 70% duty cylce...so we getting close...just waiting for this other junk like I said...
We are running on 8lbs of boost still...taking it like a champ...
We have had some issues with venting the crank case....it wants to slip out my oil pan gasket leak...small leak before boost...doesnt even show up on the ground...but boost with the old vent system...WOW..everywhere!!! but tried a few things...but looks like we are still needing to see if this set up I have right now is going to work...Its a catch can system with a breather on the back valve cover feed port that went to the intake reference on top before...and of course the catch can with a check valve at the intake ref. point on top so boost doesnt go into the catch can, but I can still get vacuum... and the front mount LS4 guys have recommended me put a filter on the valve cover at the oil filler neck...Cant do that becuase my oil return is fed there...I have and oil pump in the rear guys...so have to work around that first...
So the catch can system hasnt been tested yet either to see if it will vent the crankcase better......LOL...so just a few things left...but we will see!!
Thanks guys...ill have a pic video put together soon with the whole build and will send it out....
With that said, for the most part most of the tuning is the same, just a few differences, i.e. E67 does not have a VE table...so, my tuner had to go in with a program that is new from HP and their developers that is basically a software that allows the tuner or user to take all the given values and make a virtual VE table...which makes things very very nice...giving this car something it can use now and allow it to be tuned even better low end.... Another issue we are running into is that the car wants to keep cutting out up top at or around or a lil over 4500rpm at WOT...we have turned off all the torque mgnt etc...couldnt figure it out...its pulling timing...but now showing on the tuners screen...kind of a studder...but, HP to the rescue again WE HOPE...they have a BRAND NEW BETA program they had us dump into the ECU to hopefully counter the timing/torque mangt. from pulling...they said it might work...so we will see..so working very close with them on this right now...more history in the making lol..
The bad part of this now is, that im using a 4" SLP LS7 MAF and it appears to be too choppy down low...so it throws my fuel trims way way rich..UP TOP IT IS PHANOMINAL!! so, ive relocated it to give it more air flow pre-maf to help or hopefully counter the turbulent air down low....but if that doesnt work we have decided to switch to a LS2 MAF...its still big enough to fit in my exsisting 4" intake piping and couplers w/tbolt clamps and it is screend so smoother air across the sensor down low, and its a lil smaller so should work great for that...and not loosing too much up top...so we will see....
Now..the stupid part on this...and the lil headache we have had, is this dam upstream O2!!! My first tuner with the NA/N2O and I saw that it didnt switch at all or barely at times...it was lazy...never thought anyting of it...then my boost tuner and I get to tuning and now we NEED IT...so, i go and get a Univ. Bosch and hook it up...and the dam thing still is doing the same thing...flat line down low and then lil humps with flow....so its just not switching..we tried doing the RPM bank adjustments and plenty more...and no diff...SO lol...now we decided, lets go with a direct fit plug in OE style...same what GM uses to avoid any variable at all...and of course its a DENSO...so we will see...
but with this problem...havent been able to finish the top end of this bad boy due to these problems..becuase of these issues, im running around in open loop and no maf LOL..im sorta OLSD right now, just running off of the VE table we made with the new software.....lol but im stoich right now target at 14.66...and noway for us to determine if the BETA worked due to while runnin around in OL/VE tables, the torque values are halfed...so not going to cut out up top like it did...but cant boost period under these conditions...becuase while running in OL/SD..the last value sinced by the ECU on AFR is carried into boost..and you guessed it..if I hit a 17.0-20.0...Im boosting on that AFR...IT STOPS YOU LIKE A FRIEGHT TRAIN GUYS...did it once and that was enough...tuner said...NO MORE until we get me on MAF at least...thats number one right now....
MAF should be here in two days...would of been here alot sooner if the dumb ass on here i bought it from would of shipped it over 3 weeks ago...yeah, I know..its been a ride with him too...now I have to wait for my tuner to get back from Italy...he is an electrical engineer with Delphi...and he travels...and has a family etc...and he lives 2 hours north of Indy in Lafayette where Purdue is for you with a ? above your head LOL....so just a lil tid bit there...
Walbro 255 is in and running good after we put a standard piece of line not fuel rated on the pump and the thing spliced open on us...good thing not while tuning the first day!!! but we dropped the tank for the first one...and then for the second...we did it on the fly and just cut that football shapped pre die in our trunks...you know...the one that looks like Stewie Griffin LMAO..but it was a biatch..but now you know under that is your fuel pump assembly...but Walbro 255 runs great so far...took very well with some bucket mods etc...
Still have to put in the injectors...they are 63.5lbs shorties...flow matched etc...I had them sent off, they were custom machined from FI Clinic..came out of a Z06 Vette...all the tuning here lately has been on factory injectors...we are just now getting to 70% duty cylce...so we getting close...just waiting for this other junk like I said...
We are running on 8lbs of boost still...taking it like a champ...
We have had some issues with venting the crank case....it wants to slip out my oil pan gasket leak...small leak before boost...doesnt even show up on the ground...but boost with the old vent system...WOW..everywhere!!! but tried a few things...but looks like we are still needing to see if this set up I have right now is going to work...Its a catch can system with a breather on the back valve cover feed port that went to the intake reference on top before...and of course the catch can with a check valve at the intake ref. point on top so boost doesnt go into the catch can, but I can still get vacuum... and the front mount LS4 guys have recommended me put a filter on the valve cover at the oil filler neck...Cant do that becuase my oil return is fed there...I have and oil pump in the rear guys...so have to work around that first...
So the catch can system hasnt been tested yet either to see if it will vent the crankcase better......LOL...so just a few things left...but we will see!!
Thanks guys...ill have a pic video put together soon with the whole build and will send it out....