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It was on a FB group- I think the Tech2 one where someone was asking about an ECU upgrade
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Classic Saab 9-5 (MY 1998-2010) / Re: Twins...another project
« Last post by sgould on 27 September 2023, 08:18:31 PM »
I would expect that modern cast iron is more uniform than old stuff. So you should be fine.

We used to drill and tap holes up to 2½ inches dia. in cast iron mains.  Some of the mains were vertically cast in the early 1800's and could be anything from ½" thick to 2 inches thick.  That work was done with the main full and under pressure!! :)
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Classic Saab 9-5 (MY 1998-2010) / Re: Twins...another project
« Last post by carrera on 27 September 2023, 04:21:30 PM »
Well, here's the comparison.

They are different, but physically the same size. Note how the earlier one appears to have a larger cat on it, perhaps that's value engineering....

Anyway, as you can see both lambda sensors are off the Aero pipe. The 2.0 one has the rear one still in situ, and to be honest the only way that is coming off is with a grinder, so for now I will leave the old one on

In other news after many hours of using a dremmel, then needle files, then a small round file I got to the point where the threads were just becoming visible. I gave it a final flurry and the hole seemed ready for a tap to be run down it. Which is when I realised that the final flurry was far more efficient in terms of removing metal (because I suppose I had got to the cast iron, instead of the steel), which meant it wasn't really possible to retap the hole. So, time to drill it out & helicoil.

Tapping cast iron seems quite a bit more challenging than steel. It has hard bits and soft bits, seems quite capable of breaking the tap if used incorrectly, but I'm trying not to exert too much force & using oil to lubricate. The tap is just through the hole, but it's not fully threaded to the bottom yet

Still, the turbo has zero play, so it's worth saving

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Oh, so it's self hosted, a very Swedish solution

Thanks very much for the update, out of interest where did you pick this up from ?
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Apparently trionictuning is down due to a power failure and the person who can fix it isn't back until 1st Oct
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Classic Saab 9-5 (MY 1998-2010) / Re: Twins...another project
« Last post by sgould on 24 September 2023, 05:20:33 PM »
The cat and downpipe went from my 2007 Aero estate onto a 2000 2.0t

I still have a picture of it!! :D
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Classic Saab 9-5 (MY 1998-2010) / Re: Twins...another project
« Last post by carrera on 24 September 2023, 03:30:49 PM »
Hmm, interesting. I thought that but Saab EPC has different part numbers for different engines , at least that's my reading.

I'm do longer doing the job in situ. Decide that the hole I was drilling was going off centre so I would be better off removing the turbo. I know the extra 10bhp is nice, but I really wish they had done something to allow the fat cobra pipe to be withdrawn easily.

Whoever has worked on this car before hasn't been a Saab specialist (at best). I discovered that one of the bolt holes on the exhaust side had been problematic in the past. So a cutting disc was utilised to free off the rusted bolt by cutting into the flange  :o

As the turbo is now off I can also see that the wastegate operating rod is almost rusted through, and that the cobra pipe had been sealed using what looks like silicone sealant

Photo's perhaps later, coffee break over, I'm about to start drilling again
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Classic Saab 9-5 (MY 1998-2010) / Re: Twins...another project
« Last post by sgould on 24 September 2023, 12:25:31 PM »
The down pipes and cats are the same on all the 9-5's.  The Aero one is no different from the 2.0 one.  When I had the Hirsch 3 inch downpipe fitted, the old one went to a man who needed one for a 2.0t and it bolted straight on.
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... and UKS is back up, there's an announcement about the upgrade which I had not seen

Disappointingly, it seems that trionictuning is still down  :(
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