Re: PHenolic TB spacer... - Saab Performance Bulletin Board - Saabnet.com
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Re: PHenolic TB spacer...
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Posted by Dean [Email] (more from Dean) on Fri, 8 Jul 2005 05:52:33 Share Post by Email
In Reply to: PHenolic TB spacer..., rico, Thu, 7 Jul 2005 19:55:01
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that material has been used for this application many times, fine to use that

.3" is perhaps way overkill, try maybe .018 or .025, less flow and spray alignment issues. With .3" I expect that the fasterners would all have to replaced. Thread engagement with thiner spacer may not be an issue at all. Short thread engagement may create retension issues or thread stripping during torque. No room for T-wrench in there and most t-wrenches at-hand don't read for those low values or may be very inacurate. So short thread engagement could be all the more dangerous. Depends on whether bolts or studs are used there, which may have changed over time... don't know.

some NG900's on other markets had something like this, but with heated elements for artic starting assist, so some spacing is known to be ok on some years, main issue would seem to be spray pattern related

the TB is not the issue, but as you imply, the junction between the hot aluminum head and the manifold

a gasket would make a good template for a start

I would shy away from a glass filled composite as some of the composite might erode from heat and fuel over time and I would not want glass getting into the engine, paper phenolic sounds like the way to go. With a pattern, perhaps someone could cut these with a water jet. Otherwise a router would work with the paper loaded product (but not the glass).

These are made and sold for some other makes of engine. I think that there would be a good interest here on this site.

If applied, I do not know if one then needs two gaskets, one gasket or none. In old Volvo's paper gaskets were used between spacer and adjacent machined castings.

Have you rigged up a TB coolant flow shutoff valve for warm seasons?

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