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[Marks DTM Calib]

So to answer, the Saab heads should get your compression ratio back up (I say should as we don't have visibility here of any US specific mods that might have been done).

On the 1.8/2.0/2.2/2.5/2.6/3.0/3.2 Euro Ecotec engines, all the inlet and exhaust valves are the same size so the exhaust valves will fit no problems (plus they just don't wear on these engines so second hand is ok).

The porting procedure requires the inlet tracks opening out to match the inlet setup as the 2.5/2.6 track is slightly smaller than the 3.0/3.2.

And to correct an earlier post, the G cams were fitted to the 3.0 inlets (not the exhausts) and the 3.2 did not have the same cams.
 

[Matchless]

Just to add to the above,
All the cams are engraved with an identification letter near the drive end. There is also a number which I believe relates to the profile grinder it was made on so an A3 is an 'A' cam, G1 a 'G' cam etc. Can be difficult to see unless cleaned properly.

[elvin315]

Thank you all! This kind of info is hard to come by over here. There's such a negativity towards the Catera that good cars with minor problems are getting crushed everyday. It's very unusual to see one on the road. In fact I passed one today while returning from a doctor appointment with my Father. It was coming at me and when we passed the driver waved at me. I gave him the thumbs up. I almost crapped my pants. It was a Catera Sport, same year, same color as mine. My Pops thought I was having a stroke. You have no idea how rare a sight it is. I appreciate your help stirring interest in our cars and maybe keeping a few more on the road. They're all about "MORE POWER" here so maybe this info will inspire the DIY mechanics out there to breathe a little life into their Cateras. Thanks again.

[elvin315]

Last thing, I promise. Which Fuel Pressure Regulator should we use, and how much increased HP might we expect to see? Our L81 was robbed of 20HP and our top speed lowered to 120MPH so we'd like to get at least some of the power back if not the top speed.

[05omegav6]

Here, the 2.5/2.6 uses a 3 Bar regulator, and the 3.0/3.2 uses a 3.5 Bar regulator

[Marks DTM Calib]

Not quite right.

The 2.5/3.0 had a 3bar and the 2.6/3.2 had a 3.7 bar.

Upping the fuel pressure will give no extra bhp, it might give slightly better fuel atomisation and if you were struggling to fuel it at WOT it could help there to (but they don't stock)

[05omegav6]

My bad was off memory... which is clearly off

[Marks DTM Calib]

My bad was off memory... which is clearly off

Lol, I only know as I used to advise raising the fuel pressure on the C25XE in the Cav and Calibra and the best source was an FPR from a 2.6 or 3.2 

[elvin315]

Anyone willing to take a guess at the HP from this "Bastard" engine? (OK, sue me. I had another question.)

[05omegav6]

220 bhp ish

[elvin315]

The US spec LA3/Y32SE, as used in the CTS, is already rated at 220HP. I'm sure swapping the 3.2L heads for the 2.5L or 3.0L heads (with the G cams and sodium filled valves) would bump up the HP but by how much?

[Marks DTM Calib]

A well put together 3.2 with the increased CR and a little fettling on the inlet plus the better cams should see around 230-240bhp

[elvin315]

A well put together 3.2 with the increased CR and a little fettling on the inlet plus the better cams should see around 230-240bhp

Sounds good. Thanks.

[elvin315]

"A little knowledge can be a dangerous thing."

I gleaned a little knowledge about camshafts following you guys, made the mistake of digging deeper, and found this:



The chart lists the X30XE's 2x"G" & 2x"A" cams but there's no mention of the 4x"G" option. Forgive my ignorance but does 4x"G" mean using "G" intake camshafts as both intake and exhaust? Try not to laugh at the stupid Yank but I'd rather ask a dumb question now than do something even dumber later.

[Marks DTM Calib]

Yes, exactly that.

G's in both inlet and exhaust