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Smoothing the throttle body transistion casting.... Posted by REM in Seattle [Email]  (#4)  [Profile/Gallery]
(more from REM in Seattle) on Wed, 18 Oct 2000 16:11:33
In Reply to: Thanks Dean!, Bryan C, Wed, 18 Oct 2000 07:11:01 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I spent a bit of time this last weekend doing some "hard labor' on my 1998 900SET.
I smoothed/ported the throttle body transition casting. Be sure to remove the o-ring and sensor prior to porting the throttle body transition casting. I used the engine porting kit, Item #46056, about $30 from Eastwood Company (WWW.eastwoodco.com). It consists of a couple of 1/8" dia. spindles that accept 'cartridge rolls' of sand paper. I used a 3/8" electric drill to drive the spindle. I started with 80 grit and finished with 240 grit. I don't know how many 'cartridge rolls' came with the kit. I borrowed the kit from a neighbor and he had purchased extra 'cartridge rolls'. The job took about 1-2 hours with a couple breaks along the way. A vise, or Stanley Workmate, to hold the casting is a big help.
Thoroughly clean the throttle body transition casting with soap and water prior to re-installing it. Also lubricate the O-ring with a little silicone grease or Sil-Glyde.
It may just be wishful thinking, but with the throttle body transition cleaned-up, the car has a much smoother accelerator response and a smoother idle. Turbo spool-up maybe improved as well.
I also took the time to remove the 'silencer' from the intercooler inlet tube. The ‘silencer’ is a plastic perforated piece installed in the intercooler inlet tube. The ‘silencer’ can be removed by grabbing it with a pair of needle-nose pliers and pulling the ‘silencer’ out. The silencer is destroyed in the process. Mine tore into a few pieces as it came out.
Then wrapped the intercooler inlet and outlet tubes with Thermo-Tec Thermo-Shield high temperature reflective insulation. I cleaned the tubing first with lacquer thinner inside and out. I don't know that it will make a big difference but it looks 'cool'. As it is cool and rainy here in Seattle now, I will have to wait until summer to see if there is any real difference.
All in all it took about 3-4 hours. I needed the car on ramps to reach the hose clamps on the intercooler inlet tube. Just take your time and thoroughly clean everything. Also, a tiny wipe of silicone grease or Sil-Glyde on the ends of the intercooler tubes help in sliding them back into the rubber fittings.
_______________________________________ REM in Seattle Current: 2013 Volvo XC60 R-Design, Rebel Blue, 3.0L 6-cyl turbo, Automatic 2024 MINI Cooper S Convertible, 2.0L 4-cyl turbo, 6-speed manual Former: 2005 Saab 9-3 Aero Convertible, Steel Gray metallic, 2.0L 4-cyl turbo, 5-speed 1998 Saab 900SET 5-door, Silver, 2.0L 4-cyl turbo, Automatic 1991 Alfa Romeo Spider convertible, Alfa Red, 2.0L 4-cyl, 5-speed 1984 Saab 900T 3-door, Red, 2.0L 4-cyl turbo, 5-speed
, Wed, 18 Oct 2000 16:11:33 <-- Viewing This Message, Thu, 19 Oct 2000 11:32:04
, Fri, 20 Oct 2000 10:15:34
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