i have a S4 TII with a HKS T04R turbo that seems to work great but i noticed at ide some times the comp wheel stops spinng after a while.. what does that mean? is that normal?

 

how many miles on the turbo, my t04s 60-1 use to do that on my cosmo re for a while

 

im not too sure as i bought the turbo used from a freind and he said it worked great for him and it works great for me too but it just dosent seem right for it to do that but maybe there just isnt enough exhaust pressure to keep it spinning

 

Is there any shaft play? What RPM does the car idle at? Any porting?

 

No, I don't think your turbo should ever stop spinning anytime the car is running. Exhaust pulses will always spin the turbine wheel, thus spinning the compressor wheel as well. Even if you have a leaking manifold gasket, I would think it should still spin. You might want to pull it off(the turbo) and take off the housings and inspect everything. Make sure there is nothing restricting it from turning. Also, do a compression test.

 

there is some slight shaft play but i dont know how much is too much. how can i tell? and its a stock port brand new S5 motor..and it idles at 750 to 850..compression is great

 

Some shaft play axially and radially are normal, but feel for contact or restrictions when spinning. Does it feel like it spins freely?

 

yes if you spin it by hand it seems to spin fine it dosent stop right away it spins for a second after you turn it by hand so it seems free

 

Your fine. Big turbo, small stock ports = turbo not spinning at idle.


~Mike..............

 

ok thats good to hear thanks alot!!

 

my friend has a T88 GK on his GT-R

it doesn't spin at idle either..

u gotta blip the throttle to make it come alive...