"stock" 70 duster
got the header asket done.
the TTI's have a known problem when they are bolted to heads that are ported to fel-pro gasket size. mine are. the current fix is to have the sealing bead welded in a different location and then milled back to flat. i really DON'T want to do that if i can help it. so my idea is (and we will see how it works) is to use a smaller sized copper gasket put in "wrong".
heres the carbon tracing on the head:
and the nuked gaskets i pulled out. i ran a set like these (fel-pro exhaust manifold gaskets for a 360) on my old blackjacks for years, as well as the hedmans in my old 84 ram. never leaked.
the ones off the TTI's
my idea on the undersized gaskets is that the embossed lip fits inside the port opening of the fel-pro gaskets. my theory is that the copper is thick enough to seal the header to the head withput the bead of weld. i turned the ebossed lip inwards so it would slip into the port on the head. on the initial fire up, is sealed. no carbon tracing yet. im going to heat cycle it a few more times before i put the locks back on and see how well it works. if it doesnt, i find another solution. next step is a 1/16 steel plate with the proper brading on one side, using the port opening dimensions of the TTI headers. use a pair of gaskets cemented to each side. it should theoreticaly be a bolt on soltion id the copper gasket doesnt work.
heres some pics showing the fit difference between the summit coppers and the fel-pro's.
michael
got the header asket done.
the TTI's have a known problem when they are bolted to heads that are ported to fel-pro gasket size. mine are. the current fix is to have the sealing bead welded in a different location and then milled back to flat. i really DON'T want to do that if i can help it. so my idea is (and we will see how it works) is to use a smaller sized copper gasket put in "wrong".
heres the carbon tracing on the head:
and the nuked gaskets i pulled out. i ran a set like these (fel-pro exhaust manifold gaskets for a 360) on my old blackjacks for years, as well as the hedmans in my old 84 ram. never leaked.
the ones off the TTI's
my idea on the undersized gaskets is that the embossed lip fits inside the port opening of the fel-pro gaskets. my theory is that the copper is thick enough to seal the header to the head withput the bead of weld. i turned the ebossed lip inwards so it would slip into the port on the head. on the initial fire up, is sealed. no carbon tracing yet. im going to heat cycle it a few more times before i put the locks back on and see how well it works. if it doesnt, i find another solution. next step is a 1/16 steel plate with the proper brading on one side, using the port opening dimensions of the TTI headers. use a pair of gaskets cemented to each side. it should theoreticaly be a bolt on soltion id the copper gasket doesnt work.
heres some pics showing the fit difference between the summit coppers and the fel-pro's.
michael