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[omega3000]

All I know is my latest Omega with a 3.2 V6 is superior to any 3.0 V6 I have had in the past.

It sounds different, accelerates at a faster rate, and general out performs the others.  It is amazing what an extra 200cc and  years of engine development can achieve.

As I said to JamesV6CDX on another thread when he said similar, either you had   dog of a 3.0l, or your 3.2 is modified by Imber Tuning

All I can say I have had multiple 3.0's, one just 3 years old when purchased, and my current 3.2 is as I have stated; better than all of them

No it isn't 

[05omegav6]

Oh yes it is...

Must be panto season again

[omega3000]

Quote from Mistress Lizzie 

All I can say I have had multiple 3.0's, one just 3 years old when purchased

It must have been knackered then  if i boot mine too much it would snap my neck 

[cnj]

my recollection of a 1996 3.0ltr elite, was the accelerating modes which came into about three stages, when your ready, lets go and ___kin hang on !! because when you got into the power band on kickdown she was flying, as somebody discovered on the a38 many years ago when my right foot was heavier.

[X30XE]

I should add that I suspect the optimum using stock parts is a 3.2 block with 2.6/late 2.5 heads (which have been ported) with 2.6/3.2 exhaust manifolds, 3.0/2.5 front pipes, 3.0/3.2 inlet setup, G cams on inlet and exhaust and 3.0 injection setup minus air injection and EGR. 

This gets the earlier higher compression ratio back with the earlier injection system plus maximum cc and best crank plus the most free flowing exhaust setup off the shelf and best inlet system off the shelf.

  Excuse my ignorance, but why would the 2.6 head be better than the 3.2 ?

[Temetsy]

I should add that I suspect the optimum using stock parts is a 3.2 block with 2.6/late 2.5 heads (which have been ported) with 2.6/3.2 exhaust manifolds, 3.0/2.5 front pipes, 3.0/3.2 inlet setup, G cams on inlet and exhaust and 3.0 injection setup minus air injection and EGR. 

This gets the earlier higher compression ratio back with the earlier injection system plus maximum cc and best crank plus the most free flowing exhaust setup off the shelf and best inlet system off the shelf.

  Excuse my ignorance, but why would the 2.6 head be better than the 3.2 ?

You get higher compression ratio 

[Marks DTM Calib]

Yes, the 2.6/late 2.5 head has a smaller combustion chamber so raises the 3.2 compression ratio back up to circa 10.8:1.

You do have to port the head slightly to get it to 3.2/3.0 flow spec (not hard) and it would be worthwhile fitting the 3.2/3.0 exhaust valves as they are sodium filled.

[kluku5]

This is what I did (not because I could but because I had to :/ )

Long story short:
My 3.0 engine block failed due to one blocked cat. I got a used block from a scrapper, they said it is 3.0. Now this was a completely naked block, with the insides in, no accessories on it.

I then sat the two blocks next to each other and saw right away that they are different. Upon closer inspection I discovered that the new block is actually 3.2.

 Since I had not time (and no money to spare) I slapped my 3.0 heads and accessories on the 3.2 block. So only the block and the insides of the block are 3.2, the rest is 3.0. Also put 3.2 head gaskets on since the 3.0 gaskets would be over the edge of the cylinder obviously.

The result: works just fine, with one little difference. When I did kickdown with the 3.0 block, the car changed gear right when it was about to hit the limiter. Now it actually lets the engine hit the limiter once or twice before it changes.

[Temetsy]

Are the exhaust manifolds same in Y26SE and Y32SE? I have thought of fitting new exhausts since the cast ones of X25XE's are almost as bad as it gets and 26/32SE's manifolds would be a lot cheaper than any aftermarket manifolds (for example martelius's manifolds cost ~1000€) but are the new v6 manifolds a lot better than older cast ones or do i just save up for aftermarket ones? And another question, does 32SE have G cams or some milder cams? Thanks in advance

[kluku5]

I'm not sure about gasket size, but the later mannies are pressed steel I think. The outer diameter should be about the same, but inside diameter is larger=more room for gases and flows better.

I thought about getting a pair for my engine, but time and resources were limited so...

Hopefully I never get the chance to open up the engine and replace them

[Lizzie_Zoom]

Quote from Mistress Lizzie 

All I can say I have had multiple 3.0's, one just 3 years old when purchased

It must have been knackered then  if i boot mine too much it would snap my neck 

Oh no, I used that fully believe me, three times on a works emergency when my speed on an empty, 0300 time on the M40 reached the designers maximum specification!

[elvin315]

Could you please clarify a few things for me? I have a 2001 Catera Sport with the X30XE/L81 V6 and I was wondering what is meant by "Front Pipes" and "G Cam"? I understand the bit about the 3.0 heads on the 3.2 block to raise the comp. ratio and the need to "port" the heads but we only have the cast exhaust manifolds here. Our only source for the 3.2L Y32SE/LA3 is the 2003-2004 Cadillac CTS. Do you know if it came with the formed steel manifolds?

NOTE
Any Catera owners thinking of using the 3.2L from the CTS: You must use the 3.0L's oil pan. The 3.2L's won't clear the Catera's crossmember.

[Temetsy]

Front pipes are the part of exhaust system between mannys and middle silencers and where the cats and lambdas are. G cams are X30XE exhaust cams that have more lift than for example X25XE's F and E cams. Very common and effective tune-up for v6 engines. If I have understood right 2.5 and 3.0 v6 engines have the cast piece of cr*p exhaust manifolds and 2.6 and 3.2 v6:s have the improved ones.

[elvin315]

Thanks Temetsy!

[elvin315]

Yes, the 2.6/late 2.5 head has a smaller combustion chamber so raises the 3.2 compression ratio back up to circa 10.8:1.

The only 2.5L version of the GM 54 degree V6 sold in the US comes from the Saab 9-5 turbo (B308). Will its cylinderheads raise the compression ratio to 10.8:1 on a 3.2L block?

You do have to port the head slightly to get it to 3.2/3.0 flow spec (not hard) and it would be worthwhile fitting the 3.2/3.0 exhaust valves as they are sodium filled.

Would you describe the porting proceedure? Does it change the size of intake or exhaust valves, or is it just a mild recontouring of the passages? Will the 3.0/3.2L valves themselves fit the 2.5L valve seats without modifications?