Hey guys.
so, ever since i turbo converted my car ive had a stumble off boost.
say for instance you're doing a burnout and snapping the throttle on /off , when you snap it off it will stall or if you take off full throttle then snap off and hit the brakes it just does not like it sometimes it just stumbles itself stupid till it comes good or it will stall
now this all started when i first converted the car to turbo.
the little 13c fluttered really hard so after investigating the cbv was torn.... ok that explains it .
i ended up upgrading my turbo to a 16t with brand new cbv the problem didnt go away. i then upgraded the cbv to a kinugawa recirc one and its still the same
i then upgraded to the 19t and i still have the same problem haha
i kinda gave up caring as its easy to live with .
also possibly related my car blows a huge puff of smoke after hard boost pulls .
it doesnt smoke on idle, cruise or full boost only when i snap the throttle shut , if i ease of the throttle no smoke .its hard to tell threw the rear view mirror but the smoke looks greyish .
i have a wideband , it shows when i snap the throttle shut it goes full rich before coming back to normal
this has all be the same thru all my setups with stock tune and 2 different tuning chips .
until today i didnt relate the smoke and the stumble together . i just assumed i had bad blow by and that would explain the smoke and the stumble i just accepted it was a problem i would never figure out
now ive been looking at upgrading turbos again haha i know i know i have problems
i was looking into recirc BOV setups for ideas when i stumbled onto a heap of threads about my exact issues .
people who had incorrectly plumbed/setup their BOVs were having the same issues , stumble when snapping throttle shut and rich spikes and smoke .
so i started thinking that explains everything , except the part where im not running a BOV yet haha
as i thought about it more i thought if i had bad blow by i wouldnt just get smoke when i snapped the throttle shut , i hit full boost at 18psi and it doesnt smoke at all, my catch can basically never has anything in it
to me it makes no sense haha
anyone got any ideas ?