Uh, 110kpa is 1.4 psi. You need to take into account that the first 100kpa (more or less) is vaccum, with ~100 being atmospheric.

 

To clarify, remember that kPa here is being used as an absolute pressure reading, whereas the numbers you're used to seeing (boost pressure in PSIg) is a gauge pressure reading. When your boost gauge shows 0 PSIg, actual pressure is approximately 14.7 PSIa at sea level, which is approximately 101 kPa. That's why when you convert 10 kPa to PSIa, you get 1.4 PSIa.

To calculate 10 kPa's equivalent in gauge pressure, you'd have to subtract 14.7 from the PSIa value, which gives you -13.3 PSIg, or approximately -26.6 inHg of vacuum.

Beau

 

Thank you for the clarification.

 

Has anyone had an issue where at throttle tip in, it tries to die or just completely falls on its face? Does anyone know what that is or if its one the jitters?

 

Log this, chance is that your AFR is going super rich (or lean)

The jitter is known to happen at light throttle, 3krpm cruising load, but it never happened to me. (fix 2 and fix 3 activated)

 

Dom have you a link to fix 2,3

 

They're included in V7 SD roms/xmls:

 

Has anyone outside of dtt used his maf formula to build their 3d table? I'm having a problem in evoscan, keeps telling me that load mus be before my ve calc(but it already is).

 

I had the same problem, Make sure that the Logreference you use in the VE eval is exactly typed like the logreference under your LOAD parameter. The logreference might not be the same as what you see under evoscan on the main screen so you have to go to edit LOAD and look under logreference. Maybe you know this aleady but this is the problem I was having.

 

It's an evoscan glitch. Hit ok and it logs normally.

-Jamie

 

Thank you,

Since I have not replaced my maf yet, ( need to make a recirc for my type s) can you use this on a sd rom? Or would it show blank? (To verify function)

Also what behavior should my bov have at idle? My type-s leaks ever so slightly . It vents if you turn the wheel at idle. Should it be completely sealed at idle for best readings? I am fairly certain the metal oem does this as well. I can simply add the second spring.

All the log ref has been changed to my display

 

You wouldn't want it sucking air at idle as it will be unfiltered, It shouldn't mess anything up tuning wise if your on speed density but not a good idea to suck in unfiltered air.

NVMD it looks like you are going back to maf to do VE calcs? If so you definitly don't want it sucking air as it will throw off your VE calcs at idle.

 

A leaking bov blows air out not sucks in . For that matter my 80$ buschur maf adapter has two huge holes on each side of the adapter that don't get covered by anything. Lol

I unhooked my wastegate arm, did a pull to redline to check for boost creep. I saw 16.2 lean afr readings at a couple psi. Did that cause my Megan o2 wasn't ported and evidently doesn't need to be. So I thought how and the hell do you get that tuned right? Well.,, I've been wanting to do this for a while. So here I am gonna make a proper attempt!

 

Acutally at idle if the BOV is open then it is sucking air into the engine.

 

How sow, there's positive airflow in that space. Hook your boost gauge to your compressor nipple.

Pre tb measurment will typically be atmospheric to slightly positive . Depending on a few variables.