Originally Posted by nj1266
I did not want to start a new thread since my question is similar to the thread's starter. I have an 05 EVO with TBE and K&N panel filter and JDM DV. I am torn between getting a flash and getting an SAFC2. I want to road race the car in track events. And at the track I will use 100 octane gas. I like the fact that the SAFC allows two maps. I have never tuned a car before but I am willing to learn if soemone in the know is willing to teach me. I read threads about the SAFC and I understand the theory behind it. It is the actual practice that I lack.
I also like the mail in dynoflash since it is reasonable in price. But it seems that you need a fuel pump with the flash, but not with the SAFC2. Is that correct?
Is a fuel pump mandatory with my TBE/kn filter AND road racing? Or is it just a safety issue? I read that the stock pump tends to overheat with aggressive driving. Is that correct?
So should I go with SAFC2 or mail-in-flash for road racing?
One more thing...I have an Innovate LM-1 wideband. Is that enough to tune an SAFC2 with? Or do I need a logger?
You should not be torn between these two at all. There is no comparison. However, you may want to consider getting a base flash AND THEN using the SAFC on top of it to fine-tune at the track, on the street, and when adding mods. I have done all 3 methods: SAFC alone, flash alone, and flash w/SAFC. I have also run this combo at the road course on 100oct. Here are your answers:
1) You don't NEED a fuel pump upgrade with a flash or an SAFC, but it's highly recommended for both reliability reasons, safety reasons when running higher boost, and for tuning reasons. I say to go ahead and get one - $85 for piece of mind and more tuning flexibility.
2) You need an MBC. Add that now for another $85. This will allow you to get the boost you want and also raise it on race gas if you want.
3) If you get flashed for pump gas, then you could go to the road course and race with 100oct and no change to boost or AFRs. The reason for this is that it would provide you an extra layer of engine protection when doing 25-min sessions at full boost. Al's flashes are already on the conservative side, but using 100oct or at least a 50/50 mix would ensure safety for the duration of your event. However, you can also keep your base flash for daily driving, then at the track with 100oct, you can raise the boost a LITTLE, fine-tune a LITTLE with the safc, and then make more power at the track but without being too close to the edge for comfort.
4) No, a wideband is just half the puzzle. You definitely need a logger to keep track of timing. AFRs in a vaccuum are irrelevant. Timing alone is irrelevant. AFRs and timing together paint the picture you need to see.
Get a Forge UNOS MBC, get a Walbro 255lph fuel pump, get a base Dynoflash, then if you decide to, get the SAFC w/patch harness followed by a pocketlogger from pocketlogger.com.
Any additional questions?