Hey guys, since I am a total nub at turbo thinging....... well, in a tuning sense anyways

I was wondering if there are anything wrong with these graphs

I went on a logging run yesterday night

btw, I have done other log runs before, in 3rd gear for example, the car boosts up to 7PSI, mostly it'll be around 6 PSI

in 2nd gear (the one I did the run in) however, it spooled to only 4 PSI, and it's not constant boost, it looks like im losing manifold pressure, it goes from 4 to 2 to 3 to 4 etc etc

here's the graphs

http://i37.tinypic.com/2yyrqkn.jpg
http://i35.tinypic.com/xlgqkl.jpg

also, the first few days that I got the turbo, it spooled to 7 PSI, always, always, but now no matter what gear, it only goes to 4 PSI, I have no clue why,

there's a leak somehwere

Yeah i think you got a leak too.

i think he just Taja'd the install :)


we ruv you taj!

there is a leak in the manifold? but how? I haven't done anything T.T

they said a leak somewhere... maybe it is the mani, maybe not... have you gone back tio check every single nut and olt and fitting since installing?

thats a very important step

That's the classic symptom of installing the turbo backwards.

do you use a boost controller?
where do you tap your boost/vacuum signal?

I've heard you should re-tighten all hose clamps after the first few drive cycles as the hoses shrink and change shape with heat and pressure.

My Greddy BOV which is the default Mazsport BOV leaked after install. We had to tighten it all the way down and then back it off some. It sounds like you are running with no EBC as I think the Mazsport kit ships with a 7 psi spring.

ok, I retighted every single charge tube, and every single clamps

everything, I haven't tried the car yet, but should have no more leaks

I dont have a boost controller, I run a vaccum hose from the turbo to the wastegate, but that one is bent, it might have a leak in that tube, but i cant get to it since I don't have a jack (mine broke)

hopefully it's that and that it's minor, :D

well, if your signal to the WG is borked, underboosting might not be the symptom you'd see.....

yea, I'd think that it would simply not spool at all is what I'm thinking

If your wastegate wasn't getting a proper representation of the pressure being pushed by the turbo, it wouldn't open and you'd get too much boost.

When it doesn't see any pressure it's closed (to build boost), and it opens as pressure increases.

I see, so there probably is a leak.........but where??!!

Is the spring tension on the WG adjustable?

Fix your wastegate line now, before you drive anywhere. That's how motors go pop.

Did you try adjusting your blow-off valve? Double check to make sure no vacuum nipples are open.

ok, I just came back from fixing the wastegate actuater vacuum line, I put a brand new line in and routed it differently + heatshielded it a bit more

I haven't messed with the BOV, mine is the HKS SSQV and it seems to be fine

I will re-tighten the boost gauge once I finish lunch just to make sure, cus that is the last thing I installed

Rofl , installing the turbo backwards.... Hope you didnt weld the compressor housing onto the downpipe :)

you cant posssibly put it on backwards

you'll have to be epic Taj to do that

you cant posssibly put it on backwards

you'll have to be epic Taj to do that

Nah. That would just be a regular Taj. A regular Taj IS epic. ;)

so how did it turn out after you tightened everything...

Do you hear any noises when under boost like air rushing (like a tire deflating rapidly)? Drive with the windows and try to hear it, it should be loud if you have a serious leak.

Also check your intercooler, I've seen phantom boost leaks from bad welds on an intercooler.

ok, I tightened everything

turns out my manual boost gauge

is

epically

Tajed

like

seriously

Tajed

like, leaking

monstrously

not the vacuum line that it connects to

but the boost gauge it's self

god damn 20$ knock off ebay gauge!

I didn't buy it my self, someone bought it for me, sucksballz,glowshift should getsued

i used the int-X to log it again today

7 PSI like normal yo!

^^ why what happened??? did YOU touch it or something??


hehehe


good to hear, now get coils

lol, good thing i didn't get that glowshift gauge from the fs forum!

ok well, I uninstalled it, the boost now goes up to 7......but it still varies insanely

so my guess is that I fucked the wastegate, or my coils......or something

what is the boost source? use the vfad nipple.

I am using the Vfad nipple

It's unlikely that you fu*Ked the wastegate :) It's quite difficult even for you :lol:


You need to get a Boost gauge, and a WBo2 .....

I use my laptop as a boost gauge

You still need a wideband O2 sensor, Taj, and some tuning. My guess is you're running the base map right now, which is really conservative and can still potentially do harm to your motor. I would stay out of boost until you get some professional tuning and a WB02

I use my laptop as a boost gauge

I use my desktop as a window to the world.

I understand, I will try to stay out of boost

not that there is any left..........like seriously, there isn't any leak, and still, the turbo just doesn't spool up no more

sigh, that vaccuum line failed, I'll need to jack up the car tomorrow again and replace that vaccuum line

my motor is fine for now (compression good) the coils are ok, the sparkplugs aren't so good

I'm using the FD plugs that Scott sells on his website (as a matter of fact, I bought it from him) and one, if not two of them, are busted, since I can hear the leadings going fine (the first spark) but the second one I can hear a *tack* tack* *tack*

now, with a blown rotor, I figured the sould would be very wierd, but I never heard one before on an rx8

if it's anything like my old FD, it wouldn't whine anymore, but would be a highly disturbing clank at idle

those of you who had blown motor please tell me, in some type of word, how it sounds like

Blown motors have all varying degrees of weird sounds. When mine blew, it just felt sluggish and didn't make any abnormal sounds.

Other times you can hear odd metallic sounds, like scraping. The most common is poor idle vacuum (under 16 inches without the A/C on or any load) and a sound similar to a big tractor, sometimes lots of vibration through the shifter.

no vibration, -19mm HG idle, -17 sometimes

You still need a wideband O2 sensor, Taj, and some tuning. My guess is you're running the base map right now, which is really conservative and can still potentially do harm to your motor. I would stay out of boost until you get some professional tuning and a WB02

taja.

mr wafer has a hymee scan tool for sale.. you might invest in it!!

beers :beer:

no vibration, -19mm HG idle, -17 sometimes

well,

that means you likely dont have a blown motor..

but that does not mean you dont have a leak.. think for a second, you might have a connection that fails under boost??

beers :beer:

tmr I will go get a jack (my stock jack got owned when my friend with an sr20 backed up over it)

and I will most likely replace the wastegate actuater vacuum line, because it is bent, and this is most likely causing it....same symptom as my friend's SR 20

I will also look into the charge tube that connects the turbo to the intercooler, cus that might have been knocked by the wheen hub