With the right materials it is definitely possible to build a temperature compensated mechanical boost controller. Now to get it perfect would take much time and testing and probably a lot of

would be interesting!!

 

If you had something at the base of the spring that was able to change height when it was affected by air density changes, that might mechanically do the trick. Hmm...

 

Thats a great idea........

 

Sorry for the OT, but underhood temps would throw the cal way off. The adjustment would have to be remotely driven from another temp source and then it would be....electronic lol.

I thought about this for a little while with a temperature reacting damping fluid filled 'shock' type mechanism, but its too affected by ambient temps.

EDIT: I'll add something. To have the best of both worlds, it would be great if an unused input can be controlled by a POT directly controlling the solenoid duty cycle for a hybrid mech/elec. controller with the option to utilize the other fuzzy logic code also. this one will have to wait until the SH code is completely re-written from scratch lol.

 

i can understand the problem of tuning a car for a customer, getting the ecu set in all gears would be another expense in a competitive environment.

If I tried to put a cost on the time I have fiddled with my ecu it would put me in with the AMG guys.

 

To respond to all regarding the temperature compensation

Jack of trades had it right

it is possible to use a stack of elastomeric material to compensate for the temperature change. This is already proving in many valves we have developed here at my company for temperatures that far exceed under hood temps both above and below, we are talking -40 degrees up to +400 degrees.

Although, this is going to require lots of validation. It is not an easy task and is going to drive the cost of the unit way up. This might be the killing factor - in all likelihood this will completely eliminate the "cheap" factor of MBC

Food for thought.

 

bump for those who missed this thread

 

Occam's razor.

I have seen 3 ports go bad. I've personally experienced a 3 port failure on my own car.

Was on a Hallman for 4 years after that without a single hitch. Now on a Perrin (Buschur inline is a Perrin copy) and love it.

Thanks for the informative thread.

 

I've been tuning for less than a year. I ditched my hallman for the stock solenoid and I'm pretty happy. It is not difficult to tune. Within a few pulls had it pretty close. Turned on corrections and left it. The only thing that really made me want to switch was v7psi due to my local climate etc.

I'm the kind off be person that thinks if you can integrate a system then why not ? We are in the 21st century lol.

Maybe for a race car a mbc work so perfect but I don't see how reliable it is on the street especially here in nny. We get 50+ degree temp swings at any given point. From -40 to 10 or 20 is possible in the winter..

Although my hallman was the stable of my introduction into tuning .. Good debate especially for those just getting into modifying or self tuning.!

One thing that keeps me from going to stm for a real tune is.emery being anti ebc. I understand having a preference. my preference is to never pop the hood in a parking lot or on thee shoulder again! Lol

 

Good read. I use a MBC now because it was easy and quick to understand, install and adjust. ECU boost has always been the plan though. It has too many options for control and fine tuning not to do it. Just gotta get around the learning curve and do it yourself.

 

Most tuners Dont want to fuss with ECU boost control because it's tedious, takes a LOT longer than turning a knob on a MBC and at times, the customer doesn't want to pay for the added dyno time. It's one of those things that takes a great deal of time to get accustomed to tuning (in a timely manner) and knowing how to set up all of the parameters so it works well in all weather conditions.

I personally don't mind tuning with ECU controlled boost but I can CERTAINLY appreciate the simplicity of a good MBC as well I tune more evo's with a 3-port BCS than I do with MBC's these days.

-Jamie
(aka: Jack_of_Trades)

 

Honestly getting thee bwgdc was easier than getting a fuel curve. Getting thee corrections not as easy but theres a pretty general format for that listed that works for most. def a ton of info with little search. Bwgdc depends on solenoid type , set up and pill size if used.

In my case the stock bcs was sufficient for my needs. I used a welding tip as my pill.

 

I'd much rather have ECU controlled boost via a 3 port over a standard MBC. MBC's work well and get the job done, but there are many advantages to running a 3 port.

 

Has anyone found the ecu controlled ebc to have more lag than a mbc, My car was tuned with a mbc, i switched to the 3 port grimmspeed and it has alot more lag.

 

Yes. All testing I have done shows that a MBC spools faster.