I would bet the intake manifold or exhaust is not causing this problem. We really need a log to see what is happening. It could be knock, spark blowout, ignition misfire, fueling issue, hell your fuel cut could be set to 5000 lol. Too many possibilities we need more info.

 

I wouldnt go with blow out, his spark plug gap is almost half what mine is, but the rest are definitely a possibility, Im just trying to figure out if its got an actual intercooler or attempting to use the Intake manifold and heat exchanger for cooling down the charge.

 

He's using the stock LSJ intake mani for intercooling.

I think it could be one of the coil packs being weak or low ignition voltage, thus weaker spark and easier to blow out. But your right, .022 is some small gap and it shouldn't be blowing out- but you never know.


944 if you have the possibility of swapping out your coil packs just to try give it a shot.

 

-2.5" intercooler system. Custom cutting, 4 ply couplers and tbolts. no leaks
-3" maf housing from a typhoon intake
-to4e 50 trim with .63 a/r.
-Voodoo manual boost controller
-Turbonetics wastegate with good diaphram and 9-13psi spring.
-#60s siemens with HP custom street tune.
- ZZP adaptor plates for lsj manifold( they assured me that the LSJ mani can support my setup no prob)
-NGKr step colder plugs( tried .03, .028, .022)
-3" custom intake
-zzp BOV

 

I have my own air intercooler, not the liquid one.
Aftermarket, about the same size as the zzp

 

oh okay gotcha, do you have any closer pics of your MAF and/or charge pipes?

 

to recap:
The maf freq starts to quiver around 19 psi. Instead of watching the Hz climb as the turbo flows, at 19psi (5500-5800k range) starts to slow. Then the frequency drops down, almost like something is blocking the airflow. thats why i thought restriction.

As for the coil packs, i could try that. When the car starts to freeze up, it does throw a random misfire code. not specific to any cyl though. Which makes sense because the maf is giving out for some reason.

I can run 10-12 psi with no issues and rev it all the way out. Its pretty quick but im not running that to4e even close to its efficient range. thats why id love to run 18-20 and call it a day

 

I can take a picture tomorrow. There isnt too much i can show about the charge pipes. Everything looks normal beside the 2.5" to 3" maf housing back to 2.5" for the throttle body

I have a lous exhaust 2.5". This video was taken before i cut my cat off. Didnt see much difference besides louder spool.

 

Shown here, 10 psi

 

is there at least 6" straight pipe before and after of the MAF?


again a log and vid would help

edit: if your getting a misfire code that leads me to believe a weak coil, but still I'm not positive without log

 

yes there is a little more than 6" of straight before and after

 

My tuner lives far away but I can bump the controller up and take a video of what happens

 

First off, that front mount is a waste when you're using the lsj IM. Just added restriction. But that's kinda irrelevant ATM.

The IM is flowing plenty. Is it wasn't, you have a boost spike when you hit that point that would then go away. My vote is either maf or coil pack.

 

Is boost holding constant or climbing/falling when the MAF frequency freaks out?

Coil packs are incredibly easy to check. if you have a screw driver and a friend it can be real fun

 

i guess ill check my maf and coil packs

took a video today of higher boost. Can hear the issue right when it gets close to 20.

So whats the issue with that front mount? too small?

 

2nd gear, starts to sputter and slow around 19 psi. boosts good all the way up to there

 

I wish my work computer wasn't so laggy so I could see the video.

On a side note

 

damn that thing is sexy, what a/r?

 

Went with the .55

 

im having the same issue with my car. After 7200 feels like spark blowout or fuel cut. Def not spark yall would **** if I told u the gap I was running. On the walbro 450, and idc 1000's. I still believe its a fuel issue, sucks not being able to rev to 8200 on my 6262

 

im starting to lean towards leak causing bad o2 reading and the problem magnifies at higher boost

 

LSJ does not reference the o2 during WOT, it goes into open loop. Therefore the o2 wouldn't cause any problems with WOT

 

damn Noor is really getting on top of his game; just hammering out the facts ma'am, just the facts! Good job.

 

True. But again, I'm not talking about wot.
Wot Is fine till I reach higher boost at 19 or so.
The issue isnt connected to my wot.
I can run 13psi or under without the issue in the video

 

Did you already happen to post up a log?