rjfg

iTrader: (13)

So I just installed a Evo ix 20g with the 10.5 Hotwire in conjunction with a 4in thick Buschur intercooler. However my turbo is spooling insanely late and I'm trying to get some opinions on what the expected spool should be in this instance. The car is as till using a stock exhaust manifold but in not spooling till 4k rpm and im barely reaching full boost by 7k rpm. I am running another boost leak test but prior to that it was still spooling like crap.
Opinions please

jrainwater

iTrader: (10)

Who rebuilt the turbo and was it balanced on a balancing machine after it was assembled? If the air intake is taken off does the compressor wheel spin freely by hand? If you spin it it should keep spinning on it own for a little while, like 5 seconds or more. If it stops spinning right away then it could be seriously out of balance or the shaft nut was tightened too much bending the shaft which would cause all your issues too. Just throwing some stuff out there.

rjfg

iTrader: (13)

The wheel spins just as much as the oem viii turbo did on my car prior to this one. Thanks for the heads up tho!!! It's ideas like that that I'm searching for.

sparky

iTrader: (1)

You know what they say about opinions. JeJeJe

sparky

iTrader: (1)

How are you going about controlling boost on your setup anyhow? Is the turbo fitted with a stock, MHI, IX WGA?

merchomini

iTrader: (2)

What kind of boost controller/bov/WGA are you using?

Im gonna say boost leak test as you may have some leakes some where, or if your holding boost then your wastegate actuator needs adjusting.

goodluck

Ev0ikon

iTrader: (18)

There is no such thing. :}
Did you really boost test it to hold a bit over your target pressure for at least 10 seconds?

rjfg

iTrader: (13)

What do you mean theres no suxh thing? Theres multiple threads on here and links to the the upgrade itself.
Also yes I did a real boost leak test this isnt my first turbo car so I built a boost keak tester and ran it to the intake tube and pumped compressed air ibto it for a period of time to check for gaps and then let off the air and youll hear it

meckert

iTrader: (11)

waste gates not adjusted. tighten it down.

Ev0ikon

iTrader: (18)

What I meant is there is no IX turbo with 20G cartridge from the factory. The way you put it sounds like a OE turbo and it is not. :}
And also from your first post it looks like you have a giant leak in the system.

rjfg

iTrader: (13)

Haha oh alright I'm was like whaaaaaaa

And in response to the others it's a factory wastegate with a Buschur mbc and Tial bov

jrainwater

iTrader: (10)

I am running a tial q bov that is set up to vta. I was using the 10psi spring and it didn't hold for sh*t so I switched to the 11psi spring and it was a little better. I finally tracked down an old school 50mm 12 psi spring and it works great now. Not sure why my vaccum is so damn high but whatever works is good with me.

sparky

iTrader: (1)

Hmmm. Do you have a factory DV handy that you can install for comparison's sake. I don't trust VTA's. At any rate, if you don't have a factory DV, you could block it off the BOV to see if that helps rate of spool.

Does having a 12# spring in the BOV mean that the valve is lifting and releasing manifold boost pressure at the spring's rating of 12# ?

sparky

iTrader: (1)

At any rate, since you are using a MBC I want you to back the controller's adjustment knob all the way out counterclockwise to its lowest setting(-). Do a WOT run in 4th gear and see what peakboost is.

I agree with meckert that you need to adjust the actuator tighter or maybe even mod actuator rod length. I just think that in addition to inadequate spring pressure, that VTA BOV with the 12# spring may also be contributing to your lethargic spool.

rjfg

iTrader: (13)

My thing is that when I had the stock Evo 8 turbo on it was doing the same issue. And when I installed the new turbo I installed the wastegate that was included with the new turbo so unless both actuators would incorrect... Hmm I will check it.