Hi, I did read the FAQ thoroughly but I'm still a little confused about something. I have a 2.2 Eco cavalier I plan to 9 or 10psi turbo. I don't have the means or knowledge to tune it myself but I can install the kit myself. So I bought the GM reflash for the GM supercharger kit so that I can install and run the kit until I can get it and the factory ECU to a shop for a proper tune. I know thanks to your FAQ that I need the TMap sensor from an LSJ car which it's a given the factory Map wouldn't read the boost. What I'm confused about though is if I need to change the fuel pressure regulator? If I understand correctly the GM reflash at low boost 6-8psi should run the stock injectors/regulator so long as it has the correct Map. Is this correct? I also have the LSJ injectors for when proper tuning is in order but I can't use them with the reflash alone right? Thank you very much in advance for clearing this up for me.
You need the LSJ injectors for the reflash. I dont think the MAP matters because the reflash doesnt read boost either. It is just a locked fake 2.5 bar tune, that is pretty @!#$ty.
its an old concept. time for something new to take the reigns. - Z yaaaa
Lots of people use it just fine. You need the reflashed ecu (obviously), gmpp injectors (ss/sc or saab green tops will also work) and the tmap sensor from gmpp or an ss/sc along with pigtail.
Thanks Ryan, cleared it up for me. Don't worry Tinkles, I plan to have it properly tuned just need it drivable until I do and didn't want to get into playing around with an FMU and AFPR. Any big modification to any power train requires a proper tune unless you enjoy worse fuel economy and less power then you could have. =)
As to what I've read....the reflash converts the PCM from Alpa N which can not read boost to Speed density which "can" read boost. THus the whole reason to have the reflash done on a boosted J.
GMR has got nothing on this
DOHC_tuner wrote:As to what I've read....the reflash converts the PCM from Alpa N which can not read boost to Speed density which "can" read boost. THus the whole reason to have the reflash done on a boosted J.
LD9 s/c reflash, yes. Eco s/c reflash, no. Vince from Trifecta proved that the eco reflash is nothing more than a screwed up 2.5bar fake.
its an old concept. time for something new to take the reigns. - Z yaaaa
OP - if your turbo will not out flow the 36 lb/hr injectors, the L61 s/c reflash will get you close. It's going to be far from optimal, even vs alpha-n + FMU if custom tuned.
The LD9 ECU/Harness/2-bar flash is going to be the most effective balance of tunability and biggest bang for the buck
Thanks Tinkles for that info.
GMR has got nothing on this
Whoa, so you're saying it's not even reading boost? How does it compensate fuel increase for boost if it's not reading it?
Correct. The fuel increases are pre-programmed into the ECU. They can get away with it because the RPM/airflow relationship from the supercharger doesnt vary as much as a turbo.
Edited 1 time(s). Last edited Sunday, March 27, 2011 3:27 PM
its an old concept. time for something new to take the reigns. - Z yaaaa
Oh wonderful I didn't know that. Thanks for the info I guess I won't be running it before tuning for very long. I'm a little worried to run it like that at all but I'll keep the boost low and get it tuned with the N/A ECU ASAP. That is quite retarded as not everything is identical one engine will push slightly more/less air then another of the same configuration and supercharger's the same... What happens if your charger starts to wear? You just run a bit rich? That's quite a stupid b*tch...
i ran my saab turbo with the reflash for 10k miles or so.....no problems......10ish psi.
Hmm, well I'll bring this thread back to life after I'm running it to let you all know how it ran on the reflash. I must admit it's surprising why they would bother to package a 2.5bar map sensor with the S/C kit if it doesn't use it... Anyways will get a proper tune regardless. My set-up isn't the Saab and am pretty sure it will flow more cfm then the Saab so might have more a problem if running the Saab isn't a problem.
Vince did mention that there may be other factors at play with the L61 s/c reflash. The tables we have access to in HPT (Low and high RPM VE) were revealed to be referenced to TPS though, rather than MAP like they should be. So, to an extent, there may be some background compenstion for boost, but making it editable with the current availability in HPT would not help us. I hope that makes sense.
Yes I do understand there are limitations to what can be done with HPT particularly with the locked GM s/c reflash. Well we'll see how she runs and I'll report on it but will get properly tuned soon after either way.
