Emissions and Noise-First Cat. Removal ?

Benesesso · 04-19-2006, 03:46 AM

OK, I'm not going to boost that high. 10-11 psi is enough for me.

Tomorrow night is the dreaded turbo oil line attachment to the block. I put a bunch of antiseize on all the studs on the turbo and greased the others.

I noticed that both flanges on the oil line had warped a little from the tightening of the studs. I flattened them using sandpaper and a flat steel plate. Only took a few minutes. I wonder how many oil leaks have been caused by the under-turbo flange losing its flatness/sealing.

Wish me luck.

ddmcse · 04-19-2006, 09:29 AM

yeah those bolts are a MF to get at ...and btw 10-12 lbs will give you FCO --enjoy!

Benesesso · 04-19-2006, 05:20 PM

I see that Toy. moved the 1st cat. closer to the turbo in 1989 or 1990. My 1988 Turbo has it located back a few feet. I guess they wanted it in a hotter location.

ddmcse · 04-19-2006, 06:45 PM

1 bar is metric and = approx 14.7 psi

i started hitting fco @ around 10lbs it varies from day to day depending on many factors

mrnickleye · 04-20-2006, 06:11 AM

The function of the first cat is for cold engine emmisions control. Once the engine is warmed up, the second cat is doing the work. That is why you can easily pass the emmision tests. The engine is all warmed up during the test.

You can remove it and still pass the test, as long as the tech does not catch the fact, and fail you for a missing device. Most (95%) will not even know it was there.

04-19-2006, 03:46 AM	#1
Benesesso 3" Exhaust Join Date: Nov 2005 Location: Phoenix, AZ Posts: 145	OK, I'm not going to boost that high. 10-11 psi is enough for me. Tomorrow night is the dreaded turbo oil line attachment to the block. I put a bunch of antiseize on all the studs on the turbo and greased the others. I noticed that both flanges on the oil line had warped a little from the tightening of the studs. I flattened them using sandpaper and a flat steel plate. Only took a few minutes. I wonder how many oil leaks have been caused by the under-turbo flange losing its flatness/sealing. Wish me luck. __________________ "You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein 1988 and 1990 Turbo Supras

04-19-2006, 09:29 AM	#2
ddmcse 500whp yet? Join Date: Jun 2005 Location: CT U.S.A. Posts: 966	yeah those bolts are a MF to get at ...and btw 10-12 lbs will give you FCO --enjoy! __________________ 300+ RW HP Dyno run, jdm,mod turbo,3"exh,electfan,greddyboost Blown HeadGasket info My Supra KiXGaS

04-19-2006, 05:20 PM	#3
Benesesso 3" Exhaust Join Date: Nov 2005 Location: Phoenix, AZ Posts: 145	I see that Toy. moved the 1st cat. closer to the turbo in 1989 or 1990. My 1988 Turbo has it located back a few feet. I guess they wanted it in a hotter location. __________________ "You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein 1988 and 1990 Turbo Supras

04-19-2006, 06:45 PM	#4
ddmcse 500whp yet? Join Date: Jun 2005 Location: CT U.S.A. Posts: 966	1 bar is metric and = approx 14.7 psi i started hitting fco @ around 10lbs it varies from day to day depending on many factors __________________ 300+ RW HP Dyno run, jdm,mod turbo,3"exh,electfan,greddyboost Blown HeadGasket info My Supra KiXGaS

04-20-2006, 06:11 AM	#5
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	The function of the first cat is for cold engine emmisions control. Once the engine is warmed up, the second cat is doing the work. That is why you can easily pass the emmision tests. The engine is all warmed up during the test. You can remove it and still pass the test, as long as the tech does not catch the fact, and fail you for a missing device. Most (95%) will not even know it was there. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.