weird boosting?

cre · 02-07-2010, 12:00 AM

Quote:

Originally Posted by Green7mgte

a loss of 4psi would be one hell of an exhaust leak. and you would definitely see the exhaust coming up from behind the motor.

Yes, it would and no you wouldn't... it'd be big enough that if you knew the difference you'd hear it, but you wouldn't necessarily see anything as the leak wouldn't be losing a large volume of gasses until a high load.

Green7mgte · 02-07-2010, 12:03 AM

Quote:

Originally Posted by cre

Yes, it would and no you wouldn't... it'd be big enough that if you knew the difference you'd hear it, but you wouldn't necessarily see anything as the leak wouldn't be losing a large volume of gasses until a high load.

I have a small exhaust leak. smokes a tad at start up.

supraluver4life · 02-08-2010, 12:59 AM

haha so um... how to put this...

my turbo blew... i think. well i go too accelerate, and there is a terrible whining sound coming from somewhere around the turbo. really loud and it just gets under your skin. it will boost though if you tough through the wining and when it does boost the noise goes away so someone should confirm that it is in fact a blow turbo.

oh and what kinda shaft play should i look for?

cre · 02-08-2010, 01:57 AM

Well, a death whine sounds different than a boost leak which sounds different than an exhaust leak... still could be any of the above.

When you check the turbo there really shouldn't be much movement in any direction. If there's more than 1 to 1.5mm it's in need of a rebuild, more than 2 to 2.5 and it could be whining and possibly beyond rebuilding. Check if the impeller is making contact with the compressor housing in any spot... if it is check for missing material, don't want shavings making it past the IC and into the engine.

supraluver4life · 02-08-2010, 04:36 PM

alright great. i really dont know how much movement there is, but its probably about 1mm to 1.5mm and the turbine isnt touching the housing anywhere, so would you suggest a rebuild?

thanks again

02-08-2010, 12:59 AM	#3
supraluver4life 3" Exhaust Join Date: Nov 2009 Location: Santa Fe, NM Posts: 135	haha so um... how to put this... my turbo blew... i think. well i go too accelerate, and there is a terrible whining sound coming from somewhere around the turbo. really loud and it just gets under your skin. it will boost though if you tough through the wining and when it does boost the noise goes away so someone should confirm that it is in fact a blow turbo. oh and what kinda shaft play should i look for? __________________ Cusco front, Tein Rear coilovers Massive DDP, 3'' custom catless exhaust, Tsudo muffler 4.5'' outlet, Apexi cold air intake, Act stage 3 clutch, ct26 turbo (stock)- 10psi +300rwhp "Not driving a car because its too nice, is like not fucking your gf so shes still tight for the next guy"

02-08-2010, 01:57 AM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Well, a death whine sounds different than a boost leak which sounds different than an exhaust leak... still could be any of the above. When you check the turbo there really shouldn't be much movement in any direction. If there's more than 1 to 1.5mm it's in need of a rebuild, more than 2 to 2.5 and it could be whining and possibly beyond rebuilding. Check if the impeller is making contact with the compressor housing in any spot... if it is check for missing material, don't want shavings making it past the IC and into the engine. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

02-08-2010, 04:36 PM	#5
supraluver4life 3" Exhaust Join Date: Nov 2009 Location: Santa Fe, NM Posts: 135	alright great. i really dont know how much movement there is, but its probably about 1mm to 1.5mm and the turbine isnt touching the housing anywhere, so would you suggest a rebuild? thanks again __________________ Cusco front, Tein Rear coilovers Massive DDP, 3'' custom catless exhaust, Tsudo muffler 4.5'' outlet, Apexi cold air intake, Act stage 3 clutch, ct26 turbo (stock)- 10psi +300rwhp "Not driving a car because its too nice, is like not fucking your gf so shes still tight for the next guy"

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