Old tune with new longblock?
Old tune with new longblock?
I have a 04 enthusiast, currently running a greddy twin kit on a stock block. To satisfy my growing boost addiction, I recently purchased a stage 1 longblock from IPP. I'm still running emanage ultimate, which came with the kit, but am planning on ordering UTEC in the coming weeks. My question is, after I install the new motor, will my current tune hold me over until I can install the UTEC and make the drive to my tuner?
I've used both and to be honest the UTEC is better suited for FI. You just need a good tuner who knows how to properly work out the closed/open loop transition. Either EMS will work though.
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Randy i thought you liked the new osiris tune better then the utec you just got rid of.....dammit now im going to have to reconsider.
UTEC is actually very good and does quite a lot. Can control boost, meth, nitrous and does a pretty good job of managing AFR's when properly tuned. Only real issue is poor resolution. In comparison to osiris, it basically still would require external devices to control boost, or meth, etc. But overall I admit I don't know everything there is to know about Osiris to say definitively which is actually "better".
Edit,
Djamps mention that Utec also have a better control on ignition vs the Osiris. It something about how the ECU apply ignition vs how Utec does it.
Found the thread:
http://g35driver.com/forums/forced-i...systems-2.html
Well technically you do not have direct timing control with Osiris like you do with a full standalone (or UTEC)... you can adjust the 'burn time' but the ECU still kind of does what it wants with the timing. Still better than SS which simply subtracts timing. It's a delicate balance.
The UTEC completely runs fueling and timing in open loop (when in boost). No adding/subtracting. You can tell it exactly what timing you want in each cell. It's really a bad-@ss piggyback aside from occasional glitches when switching from open/close loop most of which can be tuned out.
You can only adjust 'burn time' in Osiris which calculates timing based on many other parameters and since it's MAF based you lose a lot of resolution in your timing/fuel tables in boost. In other words, the difference between 6 and 10 psi might only be 1 or 2 columns in Osiris while on the UTEC you have a column for every psi of boost (at least when running <10psi).
Note: I'm speaking specifically of the UTEC. Most if not all other piggybacks for our platform do simply add/subtract fuel/timing from the stock ECU program.
You can only adjust 'burn time' in Osiris which calculates timing based on many other parameters and since it's MAF based you lose a lot of resolution in your timing/fuel tables in boost. In other words, the difference between 6 and 10 psi might only be 1 or 2 columns in Osiris while on the UTEC you have a column for every psi of boost (at least when running <10psi).
Note: I'm speaking specifically of the UTEC. Most if not all other piggybacks for our platform do simply add/subtract fuel/timing from the stock ECU program.
You have control over 1 timing table and it is 'burn time'. Burn time is part of the undefined equation the ECU uses to calculate the actual timing values based on various other inputs. There is no direct correlation between burn time and BTDC, but there is enough that it works out in the end with some trial and error. I still haven't been able to get perfectly consistent timing plots on every pull... the ECU really kind of does it's own thing alot of times. In regards to timing control, UTEC and standalone certainly win.
Last edited by athenG; Sep 2, 2010 at 07:06 AM.
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