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Car: 2018 TTS
Mods: JB4 and Soul X-pipe, stock cats
Fuel: Map 0 (stock) and Map 3 pulls done on E30. For Map 4, I added some 104 octane race gas for a mix of about 96 octane
Conditions: About 5600 ft elevation, and too damn hot! Ambient temps about 92 - 94 F, IATs were 130s to as high as 147.
Dyno: Dynomite 2600 linked AWD at www.edgeautosport.com
I'm very pleased with the results. The car runs smoothly and flawlessly on all maps. I am able to routinely buy E85 to make a E25-30 mix, so Map 3 is my usual go-to. I'd sure like to have another go on a much cooler day.
What is the psi added target over stock for 3 and 4 ? Looks like it responded well to the boost increase.
copy/paste from BMS:
Map0 - JB4 disabled Map1 - 2psi peak 91 octane Map2 - 3psi peak 91/93 octane Map3 - 4psi peak 93 octane, race gas, or ethanol blend Map4 - 6psi peak ethanol blend or race gas Map5 - 8psi peak ethanol blend, race gas, CPI required Map6 - User adjustable by RPM map using settings on user adjustment page. Setting of 5.0 would request 5psi over stock at that specific engine speed. Map7 - Progressive WMI integrated map, boost profile under WMI flow adjustable on WMI page. Map8 - Low boost VALET map (400hp simulation!)
Indeed a little extra boost goes a long way! Naturally we did the first 2 - 3 pulls on Map 0. Then we skipped Map 1, and went straight to Map 2. I was caught a bit by surprise at how much power was picked up just going from 0 to 2:
Map0 - JB4 disabled Map1 - 2psi peak 91 octane Map2 - 3psi peak 91/93 octane Map3 - 4psi peak 93 octane, race gas, or ethanol blend Map4 - 6psi peak ethanol blend or race gas Map5 - 8psi peak ethanol blend, race gas, CPI required Map6 - User adjustable by RPM map using settings on user adjustment page. Setting of 5.0 would request 5psi over stock at that specific engine speed. Map7 - Progressive WMI integrated map, boost profile under WMI flow adjustable on WMI page. Map8 - Low boost VALET map (400hp simulation!)
Indeed a little extra boost goes a long way! Naturally we did the first 2 - 3 pulls on Map 0. Then we skipped Map 1, and went straight to Map 2. I was caught a bit by surprise at how much power was picked up just going from 0 to 2:
Probably the effect of the increase in timing with each boost stage increase. Looks like that when the Tmap signal is altered to add boost, it also adds timing. Combined, that is potent.
Probably the effect of the increase in timing with each boost stage increase. Looks like that when the Tmap signal is altered to add boost, it also adds timing. Combined, that is potent.
Extra potent and stock smooth, with a sound I now like, is turning out to be a real joy to drive. I appreciate you taking a well-informed look. I think I'll return to the dyno on a cooler day soon, and get some proper logging done too.
at part load you can see at your car a flickering boostgauge / below a log what JB4 do at part load / signals are not perfect transformed to the ECU
next problem is the obd connection / OBD connection is only possilbe if your ECU was in sleep mode before try to connect (you must wait at closed doors round about 15min at a 991.2 turbo S with Conti SID.X ECU)
Log your car under part load and you see following:
Extra potent and stock smooth, with a sound I now like, is turning out to be a real joy to drive. I appreciate you taking a well-informed look. I think I'll return to the dyno on a cooler day soon, and get some proper logging done too.
Latest Firmware that was just posted should fix your Can issues.
Great results man. It's incredible how much power gain with just a mild racegas blend. Imagine if you did full racegas on the highest map with a cooler day
I was working with Terry for about 4 hours last night and maybe 20 firmware revisions. Somehow got a bug in the last firmware that we finally caught.
It made a few gremlins with catching and viewing real time CANbus on the app. It should all be fixed on the latest firmware as stated above.
I'm more curious what kind of results I can get with pump 91 (Colorado, very limited 93) and open exhaust... Less interested in dealing with e-fuel or blends. Map one and two?
I'm more curious what kind of results I can get with pump 91 (Colorado, very limited 93) and open exhaust... Less interested in dealing with e-fuel or blends. Map one and two?
I've covered this well enough with BMS to be able to field this one. Map 1 and 2 are certain to work fine. Given that our 91 pump is typically E10, and 91 at our atmospheric pressure is said by petroleum engineers to have the knock suppression of 93 at sea level, I think the chances it would work properly for Map 3 are good. All we would need to do to know for sure is do some logging on our 91 and Map3 , and review it for any evidence of timing pull etc. I can do that next tank of gas
I've covered this well enough with BMS to be able to field this one. Map 1 and 2 are certain to work fine. Given that our 91 pump is typically E10, and 91 at our atmospheric pressure is said by petroleum engineers to have the knock suppression of 93 at sea level, I think the chances it would work properly for Map 3 are 80+%. All we would need to do to know for sure is do some logging on our 91 and Map3 , and review it for any evidence of timing pull etc. I can do that next tank of gas
You just touched on an interesting metric.
The factory DME calculates a portion of timing reduction as a preventer of knock instead of being a reactor to knock. It also has knock sensors since you can exceed the calcs in the real world and have real knock.
The way JB4 intercepts the Tmap and map and alters the signals For boost/timing increases, that will Also effect the timing reduction calculations by the DME. JB4 is monitoring these parameters through OBD2 and probably reacts if it gets excessive. How , would be interesting.
The factory DME calculates a portion of timing reduction as a preventer of knock instead of being a reactor to knock. It also has knock sensors since you can exceed the calcs in the real world and have real knock.
Interesting indeed, and that is an unfamiliar concept to me. No doubt I would be entirely dependent on BMS or others to interpret any logs I do.
06-05-2020, 07:23 PM
New dyno data, 991.2 TTS w/ JB4 tune
I appreciate you taking a well-informed look. I think I'll return to the dyno on a cooler day soon, and get some proper logging done too.
