General 2G DSMChips users please enter

[kiddsm95]

I have a couple questions for 2G's using DSM Chips. I understand that Jeff can specify an AFR into the chip, so based on my mods below what should this AFR be? Does running a chip with this specified AFR render WB02's & EGT gauges useless since the ECU will keep the car running as close to the defined AFR as possible.

Running the car with zero knock would be great, but if I do get knock what should I have the Knock MIL set to? What about the SAFC II, do I start over and set it back to 0% across the board and re-tune?

Mods:

1. E316G
2. Evo IX MR fuel pump (rewired)
3. Evo IX injectors
4. 3" TBE
5. Boosting 20 psi
6. SAFC II

Any help will be appreciated.

 

[DGajre777]

Since when do you need to be a chip user to answer chip questions?

To answer your questions:

1) 11.5:1 A/F ratio if you will be running 93 octane fuel.

2) It doesn't render the WBO2 & EGT gauges useless, they still work, but they'll be close to 11.5:1 ratio if that is what your fuel maps are set to.

3) What knocksum should you set the MIL to = 5.

4) Yes, you'll have to set the SAFC II to 0% across the board and re-tune.

Knock sum - On DSM's, the gauge will normally rest on the "-7", for 0 knock sum. It will rise 5 knock sum per division on the gauge, so "0"=5 knock sum, "+7"=10 knock sum, and "+14"=15 or more knock sum.

You want to see knocksum less than 5, which is basically between the first and second line (knock sum of 0-5) on the stock boost gauge coded to see knock sum. When you start to pull timing, you'll normally see knock (retard). 2Gs and 1Gs will retard 1 degree of timing (knock retard) for about 3 knock sum.

If you have any more questions, e-mail Jeff at [email protected]. He is a really helpful guy and has answered countless e-mails and questions that I have sent to him.

 

[kiddsm95]

What AFR's for 91 octane?

As for boost levels, based on the rewired IX MR pump and 560cc injectors running on stock pressure how much higher can I go above 20 psi and what will the duty cycles be? What are my actual duty cycles on the 560's right now at 20 psi? What will the duty cycles be at 22 psi?

Thanks in adv.

 

[DGajre777]

Run it at 10.5:1 for 91 octane.
http://www.dsmtuners.com/forums/tun...68815-need-help-choosing-options-dsmchip.html

As for IDCs (injector duty cycles), get a logger. I can't tell what your IDCs are on your car, with your setup. The general consensus (and I say general because I know more than a few people who have run at 95-100% IDCs) is to stay at or below 80% IDCs.

On a side note IDC is directly affected by fuel pressure. If you run your injectors at 50 base fuel pressure instead of 43 base, the IDCs will be lower. You just have to make sure that your pump can keep up with it, but since you got a EVO IX pump (instead of an VIII which has a restrictor) you should be fine. If you use a bumped up base fuel pressure, make sure you tell Jeff so he can adjust the fuel maps for you.

 

[kiddsm95]

I've got a logger, but for some reason OBD Gauge doesn't read mass flow rates on my car. I think you helped me with this before on my initial tune...

So how do I determine IDC's on the logger? I'm running an M130 with OBDG, via Multiplex translator.

Thanks for the good info btw.

 

[DGajre777]

I just realized that you had a 2G. You can't log IDCs with the logger that you have. The only program that I know of that logs IDCs on 2Gs is EvoScan - EvoScan OBDII Mitsubishi MUTII DataLogger Scantool