JMS Boost Max dyno?

[AJP turbo]

I have noticed that SCT doesn't have access to several switches/tables that are found in HPTuners in some of the other Ford applications, stuff that is minor but frustrating when SCT is supposed to be mostly Ford-biased tuning. For the Ford EcoBoost/Speed Density tuning, I haven't found a single thread that really explains how to tune the system, other than discussions and spreadsheets about the theory (how the ECU translates commanded torque into output) or how no one is going to explain how to get from point A to point B, just leave a bunch of breadcrumbs - or people showing off their engineering degrees.

Back to the topic, I have yet to find any negative reviews of the JMS/Roush Yates BoostMax, other than comments about it being a piggyback system. I'm still searching and researching and not set on any one upgrade path at the moment.

Compliments of fomocosho

http://www.focusst.org/forum/focus-st-performance/29265-jms-boostmax-controller.html

Its seems like a hack way to get a result...any tuner worth their weight in salt would not prefer that method....everything needs to work in harmony in todays tuning and cars

Youve been searching for awhile...there will always be minor switches and tables missing...but i would not say alot are missing

Have you seen my dyno results?..

You are looking for a set of cliff notes to tune your car..if it was that simple then it wouldnt take people so long to develope good tunes

But it is simple in a way.....set you driver demanded torque tables to what you want, then raise your torque limits to what is appropriate for the new torque that will be delivered.....alot of the things such as fueling is the same as old mustangs

[sholxgt]

http://www.focusst.org/forum/focus-st-performance/29265-jms-boostmax-controller.html

That gives a good review of the JMS and shows it's downfalls.  One being that the car will try to re-compensate for the piggy back.

Edit: AJP beat me to providing the link AND gave more info.

Here's another good read regarding the JMS with valuable information from someone that sells both custom tunes and the JMS...

http://www.ecoboostperformanceforum.com/index.php/topic,1930.0.html

[metroplex]

Thanks for posting that thread! That's quite interesting to see it set an overboost condition. FWIW I'm familiar with piggyback systems like Power Commander and Bazzaz.

I've run into overboost once on my SS Turbo because I didn't set the Pressure Ratio limiter properly, and for that engine (LNF) I believe if you go over desired boost by more than 3-4 psi for x number of seconds, it sets overboost and goes into limp mode. Luckily I had that happen at the track and not on the street.

[metroplex]

You are looking for a set of cliff notes to tune your car..if it was that simple then it wouldnt take people so long to develope good tunes

But it is simple in a way.....set you driver demanded torque tables to what you want, then raise your torque limits to what is appropriate for the new torque that will be delivered.....alot of the things such as fueling is the same as old mustangs

It's been 7 years since EcoBoost debuted, I figured a set of Cliffs Notes would have been made by now. The EcoBoost 3.5L is taking on a different direction with the new 2017 F-150 engine, and there are new Ford GTDI engines coming out like the Lincoln-exclusive 3.0, so I assume the 3.5L EB should have been thoroughly explored by now.

What torque limits are you raising to match the changes in the driver demanded torque table? The speed density airflow model looks very different from older Mustangs, or are you talking about the commanded lambda/base fuel tables?

[sholxgt]

I know a lot of the VW GTI guys run piggy back units because VW dealers have started going deeeep into the ECU to determine if the vehicle was EVER flash tuned and then denying warranty claims.  That has many of them concerned and going with piggy backs instead.

In my research, including talking with service managers at the dealership network that my wife works at, I'm not aware of Ford denying warranty for a vehicle that has been brought in with the stock tune loaded.  I'm sure it has happened somewhere, but I have not found record of that.

As long as Ford isn't denying warranty on cars that are brought to them in stock condition, I don't see a good reason to go piggy back instead of custom tune.

Edited to add: VW tuners even reset the flash count to zero when doing the flash back to stock, but the VW ECU still has record of it somewhere.  Tuners have not figured out where.  Maybe Ford's ECU isn't that sophisticated yet?

[metroplex]

I recall reading that Ford can check to see the number of times the ECU is flashed, and if it doesn't match their records, they'll know it has had an unauthorized modification at one point. I can't confirm whether this is true or not, but sounds logical...

[AJP turbo]

Ford has memos to service departments on how to identify modded vehicles

[sholxgt]

I recall reading that Ford can check to see the number of times the ECU is flashed, and if it doesn't match their records, they'll know it has had an unauthorized modification at one point. I can't confirm whether this is true or not, but sounds logical...

LOL, I was editing to address that above.  Good question for AJP...is there a place to reset the flash count when doing the tune?

[AJP turbo]

You are looking for a set of cliff notes to tune your car..if it was that simple then it wouldnt take people so long to develope good tunes

But it is simple in a way.....set you driver demanded torque tables to what you want, then raise your torque limits to what is appropriate for the new torque that will be delivered.....alot of the things such as fueling is the same as old mustangs

It's been 7 years since EcoBoost debuted, I figured a set of Cliffs Notes would have been made by now. The EcoBoost 3.5L is taking on a different direction with the new 2017 F-150 engine, and there are new Ford GTDI engines coming out like the Lincoln-exclusive 3.0, so I assume the 3.5L EB should have been thoroughly explored by now.

What torque limits are you raising to match the changes in the driver demanded torque table? The speed density airflow model looks very different from older Mustangs, or are you talking about the commanded lambda/base fuel tables?

The fuel tables are similar....desired lambda at wot....and fuel fuel open loop etc will let you decide when to go open loop

And there are tons of tq limit tables to change....axle tq limit, ptu tq limit , trans tq limit. Clutch tq limit . Boost limit. Lspi limit, spark limits....there maybe be over 100 at least