I think my WG is done :(
 

I spike to 10 psi and as i apraoch redline it drops to near 7 psi it was fine this morning. :dunno: i hope turning up the MBC helps me fix this. Would anything else cause this besides WG issues?

internal or ex?

internal stock 16g WG before i ran 8 psi with just WG and i had the MBC on there and was making a good 10 psi across the baords before

well...the MBC would cause it to spike because it's just a ball and spring... is this what u are talking about? it spiking and then dropping ?

no before it went to 10 psi and held steady +-1 psi now it is droping down to like 6 psi around redline.

ohhhh...dang... possible BOV leak? if you're boosting more.

no bov in place

if it were Externally gated i'd say take the MBC off and adjust it to 6-7 psi and then put the BC on to adjust it up to 10.... BUT lol

are u using a bleeding MBC?

i don't know, how often do wg springs go bad?

How is spool? Exhaust leak could cause this.

spool is good here is a log. Ive had exhaust leak i get boost the same as before but it does not carry for shit.

Its probably from not having an intercooler and no proper crankcase ventilation system.

:cry: that was just mean. :vash: :crx: ;)

My experience with an exhaust leak from turbo to manifold limited my boost to about 7psi and spool sucked a bit.

that's why i asked if you had an open wastegate line, your boost didn't seem to spool like it should....try a helper spring and see how it reacts.

but you're dropping to 5psi, the actuator must be toast...

i was criuseing and then going into spool to make sure my tip in was right and most of the time i was launching the car, only 1 or twice did i let it caost down and start sub 2K rpm and see if the spool was the issue.

well as of 2 minutes ago i am thinking it is the clutch my other WG feels about the same and i even ran with No line on the WG and it still dropped after 4K rpm. So i will bleed it later and hopefully that solves the problem :( god damn ACT extreme with 4 puck unsprung disk should be tougher than that damn you prostreet.

with an internal gate, hook up a line to it and blow in it. If no air leaks, its proably still good. if the diaphragm is ripped, you will have a leak

i highly doubt it's your clutch...

whats weird I'm looking at your datalogs, and i guess maybe your 4th gear pulls from down low your wastegate hits and maintains 8psi....but with your gun it through the gears it looks like you are spiking a 8-9psi and dropping to 4.

If it was your clutch then the RPMs would rapidly increase, your rpms are still very linear.

yes but i totally disconected the WG from vaccum source i tried it with my hand pump and it takes 12psi to actuate just fine. I think it is only slipping enough to unlaod me becouse the power falls off with the boost. And if my WG was shot internally i would never hit 10 psi. Like i said i will bleed it unless there would be a reason my motor wouldn't put out 10 PSI towards redline?

did you drive that way? how did it react then?

Are you sure your flapper is closing/seating all the way? If it's stuck partially open, you can spike to 10+ but settle down to 4.


Frank

yes i drove with a disconnected and the WG boost line. The WG is closed and the spool is fine.

whats it look like disconnect? making tons of boost?

nope the same makes 10 then drops

wire it closed...make sure the forces cant pop the wastegate flapper open, then see what it does....

K i am no thinking it was a mechanicall clutch issue more of a hydraulic issue. i have an extra 2 ft of clutch line from where i destroyed to stock flex line. but i will try this and log it. thanks guys. ill post up later in the day if it works

I have a bunch of 16g actuators laying around, you can have one for like $10

well i wired it shut and still no go so i dont believe it is the actuator anymore. thanks nester. It is either the clutch or a leak somewhere. but only under high boost and it resets itself once it goes back down this sucks :td:

wait a sec ... if your clutch is slipping, there are only two reasons that I can think of: 1) the clutch medium cannot physically hold or 2) your clutch pedal is not fully disengaging, as in it is set too high. A "spongy" pedal will only make disengaging of the clutch feel wierd and not effect how well it holds once engaged since the clutch is a spring that is unloaded when we press on the pedal.

have you ever adjusted the pedal? when i was trying to get my ACT to disengage more north i got it to a point where it would only slip in high boost after a short trip, then it would slip all the time in any boost. adjusted the pedal back and it never slipped again.

i ajusted it on the install i was having trouble getting anyengagement before pedal is firm clutch has 100 or so miles on it. it should be good for 300 crank torque./

yeah i doubt the clutch cant hold....might be an adjustment problem....

see: https://www.miataturbo.net/forums/sh...ght=clutch+rod

thanks that might help

fwiw, i just adjusted the rod back...i think shorter (cant remember) and all was good.

well i did it and now i spike 15 psi but it was better on for more adjustment and bleeding and maybe it will be ok i hope i didn't glaze the clutch we shall see.

i would take the MBC out of the loop while you figure out what the problem is. Do you think you might just have a semi-loose coupler or BOV?

No bov took the turbo appart and jb welded the compressor together vs silicone we shall see.

uhhh what?!

It might have been from when i clocked and reset my turbo the silicone could be blowing out once the boost gets past the oring. The first turbo i did this way, i used alot more silicone and no leaks on this one it might have been leaking 2 scooops and i went over the entire system even drove it with no brake booster hooked up and still got the same results. Then upon looking at the compressor my dad commented it looked like the silicone was getting blown out and sure enough it did not look normal so on goes the JB weld in the morning we shall see if it worked.

we'll see.

:yippee: It worked i just took it for a drive and i hit boost cut :D 17 psi. then i babied it up to speed past 4200 rpm where my boost was falling before and got into it and was able to keep 10+ psi just fine. So the new fix for JB weld holds the compressor together and promotes better sealing for spool :yippee: