NOR-CAL General Chat.

[Bimmerman325i]

...dirty...b34?

'splainplz.

[kronus]

european b34 had 10:1 compression pistons, and was tuned for no cats, made more power as a result.

american b34 was pretty lame by comparison.

[kronus]

i'm not really sure why they're called dirty

[Bimmerman325i]

european b34 had 10:1 compression pistons, and was tuned for no cats, made more power as a result.

american b34 was pretty lame by comparison.

Ahhh. yea, the b34 in dad's e28 is pretty.....meh.

Is the only difference the tune and pistons? cause that's fairly easy to fix. Annoying but easy.

[kronus]

I think maybe it also had a more aggressive cam.

[MR 325]

given that i need an engine '91 or newer, isn't the b34 my only option? i'll admit my knowledge on m30s is not expansive, have never really looked into them much.

Any M30B35 should work. They won't know which year it came from.

oh man, dirty b34 is a completely different story. awesome motor. better software, higher compression. we have the block of one in the shop right now, with a set of damaged pistons. I'm eventually going to find out if it's possible to get pistons welded back together cause the ones in it are neat forged 94mm bore high comp piano tops.. but two have cracks in the valve reliefs and one has a chunk of it missing.

It would be a better idea to just go with aftermarket pistons. $900 for Ross in whatever spec you want.

[george graves]

european b34 had 10:1 compression pistons, and was tuned for no cats, made more power as a result.

american b34 was pretty lame by comparison.

Are you talking about the euro "L" block? As it's referred to?

It wasn't tuned for no cats. It was just a over square bore vs stroke.

As a result - a much more "peppy" motor. It like to rev. Where a stock m30 likes to make TQ.

Any M30B35 should work. They won't know which year it came from.

Eeek! There are a lot of helpfull people on mye28 that can point you to the parts.

[MR 325]

Eeek! There are a lot of helpfull people on mye28 that can point you to the parts.

I'm talking in regards to passing the CA BAR. He wants to swap one in to his 91 vert.

They won't know what year the B35 is from when they inspect it.

I know plenty about M30 swaps, thanks.

[bastianshaw]

god I love m30s

[Pantless Spency]

Sent Neil a couple PM's about his chalkboard car/paint and he has not gotten back to me. Kind of sad that he won't reply. )':

I do know for a fact Neil's inbox gets bombarded, I wouldn't doubt that it could be full.

[Pantless Spency]

All this m30 talk has me wanting to buy this dirty old bastard.





Euro m535is.


I need to just pull the trigger already.

[MR 325]

Stop waiting.

[kronus]

Are you talking about the euro "L" block? As it's referred to?

It wasn't tuned for no cats. It was just a over square bore vs stroke.

As a result - a much more "peppy" motor. It like to rev. Where a stock m30 likes to make TQ.

Nope, the m90 and the euro b34 are different engines. Spence's pipe dream m535 has an m90, as did my old six. Euro-market 82+ e24 and e28 had the dirty b34.

Edit, to clarify, L block == m90. It is 93.4x84, vs the b34/b35's 92x86. We just built one up for the lemon!

[kronus]

It would be a better idea to just go with aftermarket pistons. $900 for Ross in whatever spec you want.

But these are already Ross in the spec I want :(

[kronus]

Euro m535is.


I need to just pull the trigger already.

Do it do it

Do you know how much they want?