Actually... I use the BTM... but that is not the point of the whole excercise... THe point is to have less patches to the PCM...

My pop always tells me that my car is a Frankenstein...

I will use a 2 bar map sensor and see how it goes... ENg mike do you have MSN?

 

 

Your mail box is full email me highlander@caribe.net

 

No question what you describe works, but I just felt it was better to actually measure the boost and setup accordingly. I have seen boost vary a few lbs with big weather swings (cold front and it going from 98F to 48F), but mainly for part throttle issues where you do not see full boost, but are still "in boost". Car is my daily driver, so I wanted to address these issues (fueling is addressed with a different maf and some other computer tweaking).

With a turbo setup and an adjustable boost controller the advantages are even more obvious.

And finally I am just a logging freak - I like to see what everything is doing at all times - and with a 2bar map you can see what type of boost you are getting (since I will be under ~15psi) at all times.

Do you have to do it - no? But I think there are some decent advantages to it, and the cost is negligible.



Off the top of my head Spark mainly, as well as changing a bunch of map threshold values (closed loop, etc.), map low/high fail codes, etc. Pretty much anything that had a map value in it. if you have an A4 you would need to alter the line pressure tables also - I didn't, and haven't tried it on a a4 (my car and the blower car I have it running on are both m6's)


Chris

 

I know a guy that addressed the issue and made the LT1 PCM correctly see boost.. He rescaled the timing table from 30-190kpa, added a table for fueling for boost and removed the maxing limitation of the maf... He will add code to control a wastegate also...

Similar to a syclone PCM but with a maf and for 8 cylinders.

sad thing is that he wont share it till his car is done... probably by summer...