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Ok - so would a 2.3 Head from a 2000 9-5 HEAD PART # B235EEA002045161 fit a c900 2.1/2.0 Block? If yes - any sort of "mods" needed as rummored, and how hard is it? I have a chance to get one CHEAP and it's only got about 20,000 miles on it and have about 6 hours to decide. Yes, No? (Rhich? Advice) Thanks in advance!
~BurnsSide42~
 

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The 94+ 2.3L head required major machine work to fit the earlier 2.0/2.1 block, never done one but have heard through the “grape vine” that head is the best of the best.
I think the modification has something to do with the timing chain area.
Not sure if cost is justifiable vs. power gains.
 

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His pn and the EPC didn't seem to comunicate. And we lost the auction anyways.

So I'm back to finding an NA head and cam set.
 

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Firstly the T7 head is not a generic "94+" head ... though it is a "shortblock" head. It flows considerably better than the T5 head. The T5 head in turn flows about 15% better than the "longblock" heads from the -94 engines. So you're looking at about 30-35% more flow than a 2.1L cyllinder head, which flows more than the 2.0.

Not only that, but the T7 head has better swirl characteristics than the "longblock" heads. If you port a cyllinder head you generally lose the swirl characteristics. This means even if you ported a T5 head to flow like a T7 you'd be more sensitive to knock and still wouldn't get as much power. The T7 head is a very good head.

EVS from SaabScene has the T7 head on his "Saabine" C900T ... looks very nice, but it was a custom job, and it does require some careful machine work, though I don't know the details. He also rigged up a standalone DI setup with the black DI rack, a liquid to air chargecooler, and it looks very very nice. :D

This post may be a day late and a dollar short, but it's good info to have, and if I find out exactly what mods need to be done to fit a "shortblock" head to a "longblock" engine I'll make sure to post them here.

On a side note I have a 2.1L cyllinder head and a new (to me anyway) C900T 2.0 ... and I"m curious just how much better the 2.1L cyllinder head flows. Also curious if anyone makes forged pistons for the 2.1L enigne itself. Questions questions questions ...

Adrian~
 

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The work required to retrofit a short block head to a B202/B212 block is neither complex nor prohibitively expensive. If your machinist uses epoxy instead of welding, you don't even have to take measures to ensure the head doesn't warp due to welding heat.

There are two small gaps at the timing cover that must be filled in, a custom bracket must be fabricated for the power steering bracket, and the motor mount bracket must also be customized. If you have AC, another bracket is required.

One benefit of the short block head is that you can run larger valves; can't do that on the B202/B212 heads.

Contrary to internet myth, you can bolt on a B212 intake without filling and redrilling the bolt holes, provided you do some careful port matching.

The combustion chamber in the mid-90s head is larger than a B212's, which is larger than a B202's. According to a c900 aftermarket tuner, a B212 head on a 9:1 CR B202 will drop CR to about 8.75:1; I'm guessing that using a T5 head will drop it to about 8.5:1. Can you say D-O-G dog off-boost?
 

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Yeah, new guy digging up some old stuff. I'm working with a guy up here in NEPA who runs the local indie SAAB specialist on building a pair of monster C900s (one his, one mine) and I've got a few questions along these lines. He picked some info (not sure where) along these same lines, but he gave me a pair of heads to check out and see if I can find a difference. One is a standard B202 head and the other is "supposedly" and early 9K 2.3L head from the only year they shared a head gasket. This is what I was told, so I have no clue if any of it is correct or not. The heads are visually identical, except for the casting #s. Originally my plan was to flow both heads, cc the combustion chambers and the ports and try to find any difference as the 2.3L head is supposed to be better. OTH, I think mis-heard his info and was thinking about the T5 or T7 head, and I don't think I'm going to find any differences. Anyone? Can you pull up the casting #s and at least tell me for sure what these heads are off of? Did the B202 and the 2.3L ever share a head gasket? Or is there a better chance this is actually a B212 head?

B202 head: casting # 758614

"2.3L" head: casting # 911535

Thanks in advance, guys!! Trying to get things rolling on my project, here!
 
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