ok so before i get into it... yes i will boost test, my compressor is in my parents garage..i live 45min from there so I dont have complete access all the time.. however just looking for some information.

i've searched and haven't found anyone with my mods on stock turbo ( cuz its dumb to have stock turbo wit my mods) but this is it.

i use ecu based boost. trying to target 24 psi or so and let it taper....

now in my wgdc right now my table looks like 100% from 0 - 3625rpm than 98.5 all the way down..

now with this setting i will boost 22...23 ish (sometimes) and tapers to 19..

now if i up it to 90wgdc all of a sudden its goin from 28psi to 24psi.

i noticed it all depends on where i start the pull from as well, if i start like 2500 rpms boost will seem to hit higher,,.. if i start at 3k (all 3rd gear) boost will want to be lower

now most the turbos i see are running 50% wgdc, which i guess is because its not a stock turbo and it moves more air..

i am runnin kelford 272's so maybe it alters it in a way.

but wondering if this is normal...or you think theres an issue with my wg (stock) or ecu boost controller.

note: as i will boost test i dont think its the issue ..whenever i did have boost leaks my car knocks..i get no knock now, but will check anyway

..sry for long post

 

A boost leak won't necessarily cause your car to knock... I'd say get that done first.

 

trust n believe mine does...

but thats not the question... i want to know on stock turbos are the duty cycles running that high?

 

No the duty cycles shouldnt be that high. A boost leak if anything will lower the duty cycle. Did you put an after market O2 housing on the car.

 

ok i didn't think it should be that high...

car has MAP o2 dump....

i'll check older logs from before this setup to see where the cycles were... if i remember correctly 70's..but that was a while ago.

also will check for leaks over weekend

 

Have you zero'd out your boost error correction table?

 

Please explain how a boost leak lowers WGDC... If air is leaking out of the intake system then the turbo has to push more air to reach a given target than if it wasn't leaking... Therefore higher WGDC

 

not enough info.. What boost solonoid, is error correct on? Sounds like multiple issues.

 

With my GM 3port I'm hitting 22-23psi at about 48% WGDC in the midrange and about 29psi at 75% on a stock IX turbo. We need more info on your setup. A boost leak would result in having to ramp up the WGDC to maintain your desired boost levels. I'd check there first.

 

As a practical matter what is the OP trying to achieve? Is he looking for quickest spool?

 

are you running the standard 0.8bar actuator? if so might be worth an upgrade to a better one, something like a 1.5bar etc that will also reduce the WGDC

 

thx for all the replies guys..

this was the main info i was looking for here... and yes i know i need a boost leak test done but was looking mainly to see on a stock turbo what WDGC's where people using .. so i def have an issue there as when i set to 75 all the way up to 100 its still like 20psi.. i know for a fact my t bolts are clamped down and i double bolt them so it doesnt back out.. so its either my used IC with an issue or bov but will boost test tomorrow.

i am using the gm 3 port as well with a stock wga... i have a fp18 psi wga as well, will prob throw that on tomorrow too

 

oh and all my correction tables were 0'd out... i have to have a huge leak somewhere...sucks its been like this a while but will get to the bottom of this tomorrow... than moar tunin funz

 

I'm using the Forge adjustable WGA w/ the 19-24psi spring. I'm sure that will make some difference, but I'm pretty sure you've got a boost leak.

 

yup.. i'm almost 100% sure thats what it is now.. i'm so amped now to get it resolved and hit track again for some real times.... i'm also suspect of my bov..its an old 9 dv.. but i'll see and post back results.