North American Turbocoupe Organization

Hi all,

I need to get the part number for the gasket that goes between the turbo outlet and the throttle body inlet tube. The PO had a fibrous gasket held in place with red silicon sealer on one side. I seem to be having a boost leak and this looked like a likely place to start. Boost seems to build, like it's really going to take off and then it's kind of a let down. The factory boost gauge indicates a steady 14 pounds of boost at full throttle, but I doubt that's actually making it into the throttle body.

I've searched and can't find any threads or FAQ's on it. If it's no longer available, what type of gasket material should I make it out of?

Here's a pic of the turbo side of the flange:

IMG_2786 by turbocoupe86, on Flickr

Thanks

The gasket is part of the "Turbocharger Mounting Set". Felpro part number ES 72811.

Great! Thanks Brian

Andy,
If the gasket doesn't fix, take a look at:
I'm not sure about the pre 87s but the 87-88 have the boost gauge sourced to the vacuum tree which is source off the upper intake.
If this is true for your 86, then the leak may be after the throttle plate. Could mean a leak opening up in the vacuum hoses or one of the sub-systems feed by the vac tree.

When installing this particular gasket, should I use or not use a gasket sealer?

I always put them on dry.

New gasket didn't really change much. I then decided to change out the fuel filter, even though the old one had only only been on the car for about a year. It had less than 500 miles worth of fuel run through it. Wow, big difference that made! Still feels like it's missing slightly at full throttle at higher RPM ranges. I'm putting in a Kirban AFPR next, so that may solve the problem.

When's the last time you gave 'er a good tune up? Possible that the spark plug gap is too large?

Andy, if the fuel filter change after only 500 miles of driving made such a difference, I am wondering if there is a large amount of rust, etc in the fuel tank that makes it thru the filter sock on the pump and is getting caught by the filter. If the new filter starts to plug in a few hundred miles, it might be worth pulling the tank and having a look. FYI, new tanks are available for a little over $100 if yours ends up being rusted / corroded internally.

or the sock fell off, which is SUPER common in these cars...

-J0N