That's awesome dude. Congrats! What tires are you running? What spring are you running currently?

 

I'm running the Yokohoma S.drive 255/40/17 in the rears. There is still some tread left. 25psi in third gear is an automatic wheel spin now.

I'm running the spring that comes with the Ptuning kit. Probably a 7lbs spring.. May get a 17psi spring to see if I can improve my boost curve.

 

Oh okay. Convention is to run a spring at least 50% of your intended max boost level. Must be a fun ride!

 

It's a handfull...

Just ordered a 4 port mac solenoid to see if I can flatten out the boost curve. The Turbosmart springs are expensive! $25 for one spring. Crazy.

 

I'm new to the EMS. With this update, will I be able to have maps for pump, flex fuel maps, and still have access to nitrous maps if I decided to spray?

 

Are you planning on dynamically flex fueling? ie. pump either 93 or E85 indiscriminately? Another option is to configure the two maps (pump/E85) to change based on your input (ie. an external switch). Regarding the use of 3 maps, just keep nitrous map on your computer and upload it to the EMS as necessary (saving your flex map calibration somewhere, of course).

 

I'm sure. Especially on street tires. I just noticed that you adjusted your subtitle; I'm not sure where maximum brake torque (mbt) occurs on E85. However, you're not going to knock before reaching (and/or passing) it on E85.

 

Never setup up the nitrous map, so can't really answer your question. There is a tab for the nitrous fuel map and nitrous ignition map. The options are there. SO I guess you could trigger the nitrous map on pump. Don't know why you would trigger it for E85 and if what gains you would get. So basically the option is there for you to have access to the nitrous map.

With 91oct, the knock voltage can be used to determine the safe boost and ignition timing because MBT is knock limited. With E85, I feel like I'm tuning blind. The danger is that I could tune pass MBT and have a blown motor on my hands.

I've been thinking up a strategy on how to tune to MBT on the street. You could set the load/boost constant say 20 psi and vary the ignition timing and calculate the torque curve. Ignition values that result in minimal increase in the torque curve is closest to the MBT. The problem with this is there are a lot of variables that could affect the torque curve and may not be so accurate say compared to a real dyno.

 

I don't really have any set plans, but I'm just curious. I had considered using nitrous in the past, but I'm near the limits of pump gas on my current setup. I didn't want to switch to e85 strictly, because I can only get it at a couple places around here. So, in my perfect world, I would like to run e85 normally, with a nitrous map on a toggle switch, and the possibility of filling the tank with 93 if I get in a jam (or e70 in the winter, etc). I was trying to figure out if the flex fuel update allowed you have 2 fuel maps that it can interpolate from without flipping a switch, plus the nitrous map on a switch. Does that make sense?

 

I understand your concern. That's probably the best you can hope for (sans dyno).

How are you activating your nitrous map currently? In answer to your other question, the new firmware update allows you to blend(/interpolate) between two maps (ie. 93/E85). The blend percentage between the two maps is dictated by the end user. The blend percentage (y axis) vs ethanol % (x axis) allows you to cater your setup to blend between the 93/E85 maps at varying ethanol percentages.