hustler

iTrader: (6)

If there is 160kpa of manifold pressure at any RPM, that's the AFR I want with piston speeds that low. This is the "skipped-gear miss shift 120,000 shaft-RPM zone).

What do you think?

redturbomiata

iTrader: (5)

after reviewing my current modified version of curlys im going to switch to hustlers, looks a little smoother for a street car, but you didnt leave yourself a big 15.x area for milage did you?

curly

iTrader: (25)

That was adapted from one of Scott's maps I believe, so you can talk to him about the benefits. I would argue that it's smoother, but I'll take a little jerkyness going into cruise if it means I get to save a couple mpgs on the way to the track. Again, not a DD, so your choice may vary.

hustler

iTrader: (6)

I spent a few hours on a road trip using the "Instant MPG" function and decided that 15.2 with ~38* of advance made the best output. This matched my shennanigans on the dyno where I made the same output numbers leaner, with more advance in cruise.

There isn't much in regard to "smoothness", drive-ability is achieved in the VE and spark tables. My numbers are based on output and several truths I discovered in the tuning process such as:

• Output increases with AFR values approaching 11.5:1, the compromise is fuel shear and oil longevity
• going leaner than 15.2 provided no MPG increase in my turbo car
• Lean-ness does not mean "faster spool" at low rpm

redturbomiata

iTrader: (5)

my plan is to follow curlys advice

curly

iTrader: (25)

For spark yes, follow his afr advice though. That's interesting about the 15.2, makes me wanna play around with mine. ABE! chop chop!

redturbomiata

iTrader: (5)

Just for you guys to laugh at me, i forgot the Mspnp base tune has overboost protection set to 1.5psi. doh

hustler

iTrader: (6)

The important thing to remember in cruise is that you're trying to move the LPP based upon spark angle and fuel. The leaner you go, the more advance you need to hit LPP at the right spot in the crank/piston's cycle.

Sometimes I wonder if better fuel economy can be achieved on lower octane fuel because it "lights-off" faster. I also am fairly certain that stronger spark can help fuel economy too.

hustler

iTrader: (6)

Don't feel bad, I still can't get Jeff's car to run in boost at all.

redturbomiata

iTrader: (5)

overboost protection makes it feel like it falls on its face.

Braineack

iTrader: (62)

not injecting fuel and cutting spark can do that

redturbomiata

iTrader: (5)

Look good?

hustler

iTrader: (6)

Sure. You don't need me to tell you this, see how the car drives. It should drive fine with that AFR table, so if it's bucking make spark or enrichment adjustments.

redturbomiata

iTrader: (5)

i have no idea how to do this again
edit: if it doesnt like it i will switch back to the previous table till i can figure out the problem.

redturbomiata

iTrader: (5)

alright so stupid question but why is there not much info about launch control? i kinda want to use it, i think.

hustler

iTrader: (6)

Advance spark in cruise as you go leaner, or fatter as you retard spark angle in cruise.