Hi,

I just installed new 650 RC injectors. I also have a UTEC and the infamous hot starting issues. The stock Osiris table shows the following for the starting Fuel enrichment for each coolant range:

-40C, 113.6%
-20C, 105.9%
0C, 100.9%
20C, 94.9%
40C, 89.1%
60C, 83.9%
80C, 79.2%
100C, 75.2%

How is the table adjusted? What numbers would make sense to use and what's been proven to work?

Thanks!

 

OK, whatever. I guess nobody can answer. I just decided to play with the numbers; I lowered the -40C to around 105% and the 100C to about 25%. That has improved the hot starts quite a bit. I might lower it some more.

 

I left -40C, -20C, and 0C alone as I haven't gotten near to those temps. I'm sure when I get home I may have to modify them a bit.

Mine, as yours, are also considerably lower than what they are stock. I have DW 600cc injectors. IIRC 100C is in the ~20% range. From what I understand, you can also modify cranking fuel with the fuel compensation table and the 400RPM row.

Hope this helps.

 

Haltech has a similiar setup called cranking inj. rate and instead of #'s with % they have similiar size number like @ 84F / 115 ms. My Z is cold starting great but hot starts were a problem so I have lowered the #'s to 84F/ 115ms to 218F/45ms. The car hot starts much better.

 

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• Rev Limiter
• DTC disable
• AFR Targets
• Fuel Compensation
• Ignition Timing Advance
• Cam Phasing for equipped vehicles.


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Parameters that we will tune include:
• Up to 5 Maps on cruise control equipped vehicles
• Idle RPM
• Speed Limiter
• Electronic Throttle Control to achieve Wide Open Throttle at all speeds.
• Rev Limiter
• DTC disable
• AFR Targets
• Fuel Compensation
• Ignition Timing Advance
• Cam Phasing for equipped vehicles.

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The Osiris Tuner system includes Cipher, Map Switching, the flash utility and our powerful, new 2.0 ROM Editor. Osiris Tuner supports NA applications and high horse power forced induction vehicles. Using the an HPX MAF and 1000cc injectors we have tuned for over 550whp on the G35.
Osiris Tuner is a licensed based system. The purchase of Osiris Tuner includes one license that will be transferred to the first ECU that is flashed. This vehicle can then be flashed as many times as the user wants, but the flash will not work on any different vehicles.
Osiris Tuner does not include any base maps or eTunes, the user is expected to develop their own tune for their vehicle using the stock ROMS included in the software package.
Parameters that are supported in the ROM Editor include:
• Up to 5 Maps on cruise control equipped vehicles
• Idle RPM
• Speed Limiter
• Electronic Throttle Control to achieve Wide Open Throttle at all speeds.
• Rev Limiter
• DTC disable
• AFR Targets
• Fuel Compensation
• Ignition Timing Advance
• Cam Phasing for equipped vehicles.
• MAF transfer function
• Cranking Enrichment and Ignition Advance
• Injector Latency
• K Fuel Multiplier
• Intake Temp
• Calculated Load vs. RPM
• Minimum Effective Injector Pulse Width
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Can I go to an authorized tuner/dealer and have the base flash done? I already have a Utec and do not want to completely switch over at this point.

 

Lots of tuners flash the ECU when using a standalone.

Not sure if there are any tuners doing that on Mars however...


-jb