Need more KPa in the Y axis of my map..

[Jon k]

Hey guys - I need to add more bins vertically because my motor is making 170 KPa boost and I only have it up to 150 KPa right now.

What do you guys suggest?

[/img]

[ptegler]

For one thing...fix that 12 kpa...I assume it's suppose to
be 120

simply re-format all your kpa to every 15kpa rather than
every ten.

The scale does not have to be linear. you actually want
more settings around the areas of the map that you usally
run. Like more at crusie, idle. The top most bin can make
a jump if al lthe settings are near the same as the system
interpolates everything in between bins.

ptegler

On Tue, 29 Aug 2006 06:50:19 -0700
"Jon k" <jkensy@comcast.net> wrote:

Hey guys - I need to add more bins vertically because my
motor is making 170 KPa boost and I only have it up to
150 KPa right now.

What do you guys suggest?

[/img]

------------------------
BMW M50 Non Vanos 24v 2.5L Turbo
MS-1 V3 running fuel and spark on MSnS-E 029s

Paul Tegler
ptegler@cablespeed.com
http://www.teglerizer.com

Posted by email.

[Fastest95PGT]

As ptegler above said, just increase the difference between row kpa values. For example, you could run 20, 35, 50, 70, 85, 100, 115, 130, 145, 160, 175, 190.

Also, is that a running VE table? It's strange that at your highest boost setting your VE dives from ~5-6k.. also your VE values are pretty low in general for being at around 7psi (150kpa).

[Jon k]

As ptegler above said, just increase the difference between row kpa values. For example, you could run 20, 35, 50, 70, 85, 100, 115, 130, 145, 160, 175, 190.

Also, is that a running VE table? It's strange that at your highest boost setting your VE dives from ~5-6k.. also your VE values are pretty low in general for being at around 7psi (150kpa).

It is only a partially working table. I am still working on setting up the bins and all before I go crazy tuning it. Changing the increments of KPa will require me to retune the car, no?

[Fastest95PGT]

It is only a partially working table. I am still working on setting up the bins and all before I go crazy tuning it. Changing the increments of KPa will require me to retune the car, no?

You should save a copy of your current VE (which you already have posted here) and then adjust the Y axis values. Then try and place values which fall in the range of what they were in your table before into the appropriate rows. If a row is now in between two others, then split the difference.

Retuning requirement should be minimal if you pay attention when merging your table.

Also, if you built your MS yourself (or are comfortable with modifying it), you could build the table switching ground activated circuit and then build an output (such as output 1 or 2) to cause you to table switch when at the desired MAP value. This would essentially give you a 12x24 fuel table. . . though I would suggest having them overlap by approx 10 kpa for latency purposes.

[Jon k]

It is only a partially working table. I am still working on setting up the bins and all before I go crazy tuning it. Changing the increments of KPa will require me to retune the car, no?

You should save a copy of your current VE (which you already have posted here) and then adjust the Y axis values. Then try and place values which fall in the range of what they were in your table before into the appropriate rows. If a row is now in between two others, then split the difference.

Retuning requirement should be minimal if you pay attention when merging your table.

Also, if you built your MS yourself (or are comfortable with modifying it), you could build the table switching ground activated circuit and then build an output (such as output 1 or 2) to cause you to table switch when at the desired MAP value. This would essentially give you a 12x24 fuel table. . . though I would suggest having them overlap by approx 10 kpa for latency purposes.

The table switching is interesting but I think I want to stick to one table, so I will try to realign the tables.

[jsmcortina]

I would suggest deleting the 30 and 40kpa rows and shuffle everything else down, then add 170kpa and (say) 190kpa rows at the top. Set the 190kpa to be very rich so that if you overboost it will run safely.

James

[Jon k]

I would suggest deleting the 30 and 40kpa rows and shuffle everything else down, then add 170kpa and (say) 190kpa rows at the top. Set the 190kpa to be very rich so that if you overboost it will run safely.

James

Ok james, good idea. Also, my idle is ~950 - 1000... it sits right on the border of two bins... around 36 kpa idling at about 950 - 1000... so it bounces 14.5.....12......14.7.....12.... its frustrating - I tried to move the bin larger but it still seems pretty unstable afr wise. I think my plugs are really fouled - could tha tbe it?

[jsmcortina]

If you are holding AFR within a few points at idle is there a problem?

James

[Jon k]

If you are holding AFR within a few points at idle is there a problem?

James

Not really but the idle tends to swing rpm up and down a little bit.