SR20DET smoking after boost, need advice - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

cdvr-s13 · 09-05-2009, 04:11 PM

I just upgraded to a GTI-R T28 and when I put on my tubular manifold I had to delete the stock catch can and currently have crank case ventilation connected through the T on the valve cover and into the turbo inlet. My HKS adjustable actuator is set to 9 psi.

During a pull the car boosts really hard and doesn't smoke while i've got the pedal mashed and doesn't smoke when i let off. as soon as i hit the throttle again however, a burst of blue smoke comes out. So basically I am wondering if this is only happening because I don't have a catch can, and if its normal to lose some oil during normal operation. The car burned absolutely no oil on my stock T25, but then again I was under stock boost and had the stock catch can set up.

Danb · 09-05-2009, 06:05 PM

Do you have a oil restrictor on it?

jspaeth · 09-05-2009, 06:09 PM

This doesn't seem terribly abnormal....you removed the catch can.

On hard pulls, some oil can get "flinged" up into that tee fitting and perhaps make its way into the intake track.....I would put the catchcan back in and see if that fixes it.

Also, you should run an oil restrictor....if oil is getting past the seals, that's probably worse than what I said above

SoguRacing · 09-06-2009, 01:14 AM

i doubt that on the the oil would make it from the intake all the way through the compressor side of the turbo, through the intercooler, up 2 feet into the cold pipe and past the throttle plate and into the combustion chamber. you need to use a restrictor on a ball bearing turbo and secondly your rings on your pistons could be going bad. do a compression test to find out. if your numbers are... say 140- 160 across all cylinders then your compression is fine. It's most likely the seals in the turbo going out.

*fliprayzin240sx* · 09-06-2009, 07:35 PM

He could be running rich off throttle and just burning it up hence the smoke.

steve shadows · 09-06-2009, 07:38 PM

Quote:

Originally Posted by cdvr-s13

I just upgraded to a GTI-R T28 and when I put on my tubular manifold I had to delete the stock catch can and currently have crank case ventilation connected through the T on the valve cover and into the turbo inlet. My HKS adjustable actuator is set to 9 psi.

During a pull the car boosts really hard and doesn't smoke while i've got the pedal mashed and doesn't smoke when i let off. as soon as i hit the throttle again however, a burst of blue smoke comes out. So basically I am wondering if this is only happening because I don't have a catch can, and if its normal to lose some oil during normal operation. The car burned absolutely no oil on my stock T25, but then again I was under stock boost and had the stock catch can set up.

Your turbo seals are dying

09-05-2009, 04:11 PM	#1
cdvr-s13 Leaky Injector Join Date: Jul 2008 Location: S13-000066 Age: 37 Posts: 107 Trader Rating: (0) Feedback Score: 0 reviews	SR20DET smoking after boost, need advice I just upgraded to a GTI-R T28 and when I put on my tubular manifold I had to delete the stock catch can and currently have crank case ventilation connected through the T on the valve cover and into the turbo inlet. My HKS adjustable actuator is set to 9 psi. During a pull the car boosts really hard and doesn't smoke while i've got the pedal mashed and doesn't smoke when i let off. as soon as i hit the throttle again however, a burst of blue smoke comes out. So basically I am wondering if this is only happening because I don't have a catch can, and if its normal to lose some oil during normal operation. The car burned absolutely no oil on my stock T25, but then again I was under stock boost and had the stock catch can set up. __________________ SCAMMERS MrFuel sold me a cracked manifold geoff240sx sold me a blown turbo

09-05-2009, 06:09 PM	#3
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 40 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	This doesn't seem terribly abnormal....you removed the catch can. On hard pulls, some oil can get "flinged" up into that tee fitting and perhaps make its way into the intake track.....I would put the catchcan back in and see if that fixes it. Also, you should run an oil restrictor....if oil is getting past the seals, that's probably worse than what I said above __________________ Daily driven

09-06-2009, 01:14 AM	#4
SoguRacing Post Whore! Join Date: Nov 2007 Location: (714) Age: 39 Posts: 2,967 Trader Rating: (23) Rides Gallery: SoguRacing Feedback Score: 23 reviews	i doubt that on the the oil would make it from the intake all the way through the compressor side of the turbo, through the intercooler, up 2 feet into the cold pipe and past the throttle plate and into the combustion chamber. you need to use a restrictor on a ball bearing turbo and secondly your rings on your pistons could be going bad. do a compression test to find out. if your numbers are... say 140- 160 across all cylinders then your compression is fine. It's most likely the seals in the turbo going out. __________________ Pre Tune Checkup! Compression,LeakDown,Vacuum Test $80. Cams Install: $180

09-06-2009, 07:35 PM	#5
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	He could be running rich off throttle and just burning it up hence the smoke. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

09-05-2009, 06:05 PM	#2
Danb Zilvia Member Join Date: Sep 2009 Location: Carrollton, GA Age: 37 Posts: 156 Trader Rating: (2) Feedback Score: 2 reviews	Do you have a oil restrictor on it?