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thechuckster Forums Junkie Location: Brisbane Registered: February 2003	Re: what would make turbo manifold run red hot? leanout? very-rich? Tue, 13 April 2004 14:06 hi skip/toobs, sounds like you've both hit the right nail: gasket was leaking severely around exh 4 & 1 (which is where it failed with last two gaskets) so is likely that i need for shorter studs as i probably pulled the nuts up to the end of the thread. i've pulled the manifold off and am in process of separating intake/exhaust parts from each other. (it's fun using hand hacksaw to cut thru >10mm of steel) After separating exh4 from rest of plate, it sprang back about 1mm so i think when it all heated up the whole-thing curved and pulled away from the head at the ends - which is where the leaks are ;( the retarded timing must also have been a major bad move on my part - i had expected it to run cooler/richer. The dizzi has been regraphed for less total advance and slower rising rate. I set the timing at idle down from what looked like >20 degrees to 12 because is sounded like it was detonating (nasty ratle) and when you floored it at low revs or low boost it pinged something fierce. During that day, it was behaving really well on boost (until i got to >10psi where it stumbled). i'm going to run megaspark so i get boost-retard ignition, but i'll need to find a relevant timing-versus-MAP map as a starting point. there's a few more pics here: http://members.optushome.com.au/mkhala/red_celica/ pdfs/RA40-april%2004-part1/RA40-april%2004-part1.h tml ... shows where the gasket failed (again). also shows what happens to heat wrap if it gets red/white hot. fwiw, even if we had ran the timing up to where it was previously, the leaking gasket and oil-dripping-on-wastegate would have doomed the ride anyway [Updated on: Tue, 13 April 2004 15:01] [Report message to a moderator]

	Subject	Poster	Date
	what would make turbo manifold run red hot? leanout? very-rich?	thechuckster	Mon, 12 April 2004 15:58
	Re: what would make turbo manifold run red hot? leanout? very-rich?	TA22	Mon, 12 April 2004 16:34
	Re: what would make turbo manifold run red hot? leanout? very-rich?	wilbo666	Mon, 12 April 2004 22:39
	Re: what would make turbo manifold run red hot? leanout? very-rich?	Skip	Mon, 12 April 2004 23:27
	Re: what would make turbo manifold run red hot? leanout? very-rich?	thechuckster	Tue, 13 April 2004 02:00
	Re: what would make turbo manifold run red hot? leanout? very-rich?	RWDboy	Tue, 13 April 2004 02:52
	Re: what would make turbo manifold run red hot? leanout? very-rich?	Skip	Tue, 13 April 2004 04:58
	Re: what would make turbo manifold run red hot? leanout? very-rich?	E30-323ti	Tue, 13 April 2004 09:05
	Re: what would make turbo manifold run red hot? leanout? very-rich?	Toobs	Tue, 13 April 2004 09:16
	Re: what would make turbo manifold run red hot? leanout? very-rich?	Skip	Tue, 13 April 2004 09:21
	Re: what would make turbo manifold run red hot? leanout? very-rich?	thechuckster	Tue, 13 April 2004 14:06

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