sensor adapter

http://www.ebay.co.uk/itm/JM-Fabrica...item2c5c3d6c1a

 

Thanks Todd, any particular market or could it even be off a JDM. A link will be great ...I have a GM 3bar Map sensor with me

 

There is also 88580714 sd version available which works fine in EDM car, no need to use US rom.

 

My question is regarding a Grimmspeed EBCS 3-port... and Tephra v7...

I've converted from my 008 Rom to Tephra V-7 Rom 0715... I live in VA Bach and the atmospheric pressure is right around 14.5 (Boost Adder)... Stock WGDC is 100% for all value cells... I cut this to 50% just to be safe... I changed every cell in the Boost Desired Engine 'PSI' table to "20". as i was hoping to run 20 psi at peak..... zeroed out the BEC Table right column.. and i began my 3rd gear runs... i couldnt get but 50-70% throttle and i began overboosting (roughly 23-25 psi) hitting load cells of 260 on a Evo 8 and 93 octane... i then cut the BDE table back several times and tried again.... and now it is set to "0" across the board.... I'm still over boosting and i dont understand why... if anything at 0 BDE 'PSi' it should be running off the waste gate spring.. checked the hook ups on the 3 port and everything is hooked up correctly per the diagrams from Grimmspeed...

 

Can you post a screenshot of all relevant maps?

 

jdm9s have them im not sure about other usdm models , one from a cj4a 1.6 mivec colt 96-00 will do either .

dont think the gm sensor needs an adapter but heres the link for the oem 3 bar one

http://www.ebay.com/itm/190526090266...3d6c1a&vxp=mtr

 

Your over boosting because your wastegate duty is too high. WGDC controls the boost. Then the desired boost, is the curve you want it to follow, but you have to tune the WGDC to control boost and try to hit that desired boost.

 

i attached the screen shot of my latest tables...

 

Like Jay said, your WGDC is probably too high and causing you to overboost. Also, the reason you're reaching full boost with only ~50% TPS is because of the "WGDC = 100% under X load" and "TPS vs WGDC correction" tables.

 

That makes alot more sense now... wgdc stays at 100% till "200" load is the standard??

As far as setting the TPS vs WGDC what is a good standard? i would assume no higher than the greatest value on the WGDC Main map?

 

100% till 200 load is the default value, I have it disabled because it negatively affects partial throttle application, which I need for road racing.

TPS vs WGDC is only a modifier. I takes the value in your WGDC and multiplies it by that value for whatever TPS you're at. So for example, if you set it to 50% at 50% TPS, then at 50% throttle you'll have half of the WGDC of what is in your WGDC map. In your case, since your map is at 50% accross the board, you'd have 25% WGDC at 50% TPS. This makes sense because you're not at full throttle, so you probably don't want full boost. My table has the following values:

Again, since I road race, I don't want my throttle be an on/off switch, I need to be able to gradually build up boost as I exit a corner. So this works for me. If you're tuning a drag car for example, you'd want to leave this at 100% for all TPS values to ensure fastest possible spoolup. And you wouldn't zero out the "WGDC = 100% under X load" table either like I have, as that also serves spool the turbo as quickly as possible.

 

I set the WGDC to "0" and zeroed out the "100% WGDC till X load" table... ran WOT and the car ran off the wastgate spring(12psi) .. slowly increased the WGDC through about 4 more runs and found that at 65% i can make 20 psi at peak and taper down to about 16.7 til red line...

my boost error logs throughout this run stayed at -3.087.. based on the posts in previous threads i know that i want a boost error between -1 and 1....

does negative boost error mean that the motor is under the target boost curve (BDE 'psi')??

if so...

that would mean that i should lower the BDE 'psi' map? or raise the max WGDC map?

 

Boost error reading -3.087 means your boost is below the target boost curve, yes. If your actual boost is following the curve you want then don't change the WGDC map. Rather, it's the BDE 'psi' table that will need adjusting. here's how the target boost curve is calculated by the ECU:

(boost adder) + (BDE 'psi') = (atmospheric pressure) + (boost pressure)

Therefore, if you want a target of 20psi of boost, add to that your atmospheric pressure (which should be around 14.5 like you have it now) and that's the value that your boost adder + BDE table need to add up to.

What MAP sensor do you have?

 

Omni Power 4 BAR... in my last log boost adder was 14.5 and every cell in the BDE 'psi' map was 20 = 34.5.... what do i do with the 34.5... i guess is my question... where am i looking for that value at?

 

nevermind... i got it.. i need to change the values in the cell that dont equal to 34.5 based on my OMNI logs for those RPMS....