North American Turbocoupe Organization



Throttle body inlet tube flange gasket?
GreyBird Offline
Junior Member
#1
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:

[Image: 14183147758_8b579ec48a_n.jpg]IMG_2786 by turbocoupe86, on Flickr

Thanks
Andy Royes
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Not B Anymore Offline
Administrator
#2
The gasket is part of the "Turbocharger Mounting Set". Felpro part number ES 72811.
Brian Leavitt
'86 TC 5-Speed -- MS2x w/COP | 83 lb. injectors | T3/T4 50 Trim Stage 3 .63AR | Full 3" Exhaust - No Cat | Motorsport FMIC | Ranger Roller | Ported E6 | Walbro 255HP | Kirban | 20psi | 120-amp 3G | 8.8" 3.55 rear | '03 Cobra Wheels
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GreyBird Offline
Junior Member
#3
Great! Thanks Brian
Andy Royes
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Pete D Offline
Administrator
#4
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.
Pete Dunham


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GreyBird Offline
Junior Member
#5
When installing this particular gasket, should I use or not use a gasket sealer?
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Not B Anymore Offline
Administrator
#6
I always put them on dry.
Brian Leavitt
'86 TC 5-Speed -- MS2x w/COP | 83 lb. injectors | T3/T4 50 Trim Stage 3 .63AR | Full 3" Exhaust - No Cat | Motorsport FMIC | Ranger Roller | Ported E6 | Walbro 255HP | Kirban | 20psi | 120-amp 3G | 8.8" 3.55 rear | '03 Cobra Wheels
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GreyBird Offline
Junior Member
#7
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.
Andy Royes
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Not B Anymore Offline
Administrator
#8
When's the last time you gave 'er a good tune up? Possible that the spark plug gap is too large?
Brian Leavitt
'86 TC 5-Speed -- MS2x w/COP | 83 lb. injectors | T3/T4 50 Trim Stage 3 .63AR | Full 3" Exhaust - No Cat | Motorsport FMIC | Ranger Roller | Ported E6 | Walbro 255HP | Kirban | 20psi | 120-amp 3G | 8.8" 3.55 rear | '03 Cobra Wheels
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Jeff K Offline
Administrator
#9
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.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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jmthunderbirdturbo Offline
Posting Freak
#10
or the sock fell off, which is SUPER common in these cars...

-J0N
APRIL 2018 - LOOKING FOR A NEW CAR. PM me if you have an 87-88 roller or cheap TF for sale.
1988 TC 5MT-Blue/Blue check-off car. resto-project.
2006 Honda Odyssey 5AT, baby-mobile.
2013 F-150, 5.0, 6AT, 4x4, snow white paint.
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