Starting my m30b34 swap this week

[cheapshot]

with the b35 head you're gonna drop down to around 7.5 or so to 1. Stock is 8:1. Plenty low enough for boost. The hot ticket would be to get the cam, valves, and valve spring from the b35 and have the b34 head machined to accept the larger b35 valves. The b35 cam also has more lift and duration and dual valve springs. This is what I am doing to my b34.

[dhcg86]

sounds expensive...sigh

[SpeicherBimmer]

with the b35 head you're gonna drop down to around 7.5 or so to 1. Stock is 8:1. Plenty low enough for boost. The hot ticket would be to get the cam, valves, and valve spring from the b35 and have the b34 head machined to accept the larger b35 valves. The b35 cam also has more lift and duration and dual valve springs. This is what I am doing to my b34.

Or just buy a Euro B34....but yes, lower CR is better for boost. Stock 1G DSMs (I used to have 3 of them) only have 7.8 or so CR stock and take boost like a hooker takes...well you get the idea. Turbo M30s are well outside my knowledge, though. With that low CR and B35 cam I'd imagine that engine would be a dog off boost putting around town...

[dhcg86]

well I already found my engine lol, so thats outta the question. Unless I find a b35 head thats had all that work done to it I probably wont do it myself, but who knows.

[kronus]

You know that's the most difficult M30 transmission to put in, right? It's about 3" longer than a 260 and requires a shortened driveshaft. You can use a stock ETA driveshaft with a 260, and the one you got with the trans is for a 5 and way longer.

[dhcg86]

Ive read differing things in that regard but I figure worst case scenario I will need the driveshaft shortened amirite.

it is also the best tranny from what I can tell

[george graves]

G265 has it's advantages. Removable bell housing - and IIRC it a beefier trans.

You will need get a custom driveshaft - I used a e30m3 DS shortened. I paid $200 for the shaft, and $400 for it to be shortened, rebuilt, and rebalanced.

My build thread is here: http://www.r3vlimited.com/board/showthread.php?t=78914

[dhcg86]

ok so no turbo for me this month

[dhcg86]

G265 has it's advantages. Removable bell housing - and IIRC it a beefier trans.

You will need get a custom driveshaft - I used a e30m3 DS shortened. I paid $200 for the shaft, and $400 for it to be shortened, rebuilt, and rebalanced.

My build thread is here: http://www.r3vlimited.com/board/showthread.php?t=78914

Ive read that thread before, loved it!

thanks for posting in mine.

fml I should prolly just get a g260 and not spend so much fucking $$$

[george graves]

Yea, you can sell that g265 for ~$250-300 (?) - and get a m30 5-speed tranny, then mix and match front and rear driveshaft to get what you need. I forget what you need - but the info is on here somewhere.

[dhcg86]

well good thing I didnt pick the g265 up!

I have a line on a g260/6 shipped for 450, hopefully the guy is still selling

[wildstoats]

Man, so much haterade for the g265 - :p . Just wanted to offer my $0.02 on using one. All you have to do is shorten the front half a bit, reuse the rear section as-is, and mount it up using an e30 m3 transmission brace. In my case I used the front from an e28 and the rear from my 318, sent the whole assembly out to a shop in RI who shortened and balanced it for me. If you do end up sticking with the g260 don't forget that you'll need a large flange driveshaft if I'm not mistaken.

[dhcg86]

yea I think I have a large flange driveshaft.

problem is shipping and handling plus driveshaft modification is too much money for me atm, especially when I can get the g260 for 1/3 of the price

[george graves]

Man, so much haterade for the g265 - :p

No hatred - If you go back on the archives on the m30 stuff - you'll find guys getting a DS modified at a truck(semi-trackto trailer) for $20. I was just telling you want I had to do in my part of the country. That said - it's a better box.

In the words of will smith - don't be silly.

[dannyyisntt]

I'm using the 265 trans and it looks like a combo of e12 driveshaft and e30 is gonna work without modification. Tho I haven't had a chance to put them together, the measurements look right.

If you go 265 then pick up a new e30 m3 trans brace. They're like $25 from pelican