Simple_Smith's 2.7i eventual turbo build

Simple_Smith · 04-02-2012, 04:01 PM

Gotcha. And the block date is right on the side of the block next the the part number, right? So that would make the engine in my car a seta... Very interesting...

acolella76 · 04-02-2012, 03:47 PM

I read that somewhere as well, but I haven't noticed a difference so I am going to say it's false. Also forgot to mention that there is a difference between late model and early model block bearings. I mix up which blocks have what bearings, but just make sure to order bearings for your specific block date.

Simple_Smith · 04-02-2012, 03:44 PM

I read somewhere that the eta and I blocks were like .5mm deck height difference. But as it being the Internet, you have to take everything with a grain of salt. Also something about the eta blocks having an extra oil drain galley. I dunno. Doubt it would make much of a difference anyway.

acolella76 · 04-02-2012, 03:21 PM

All M20 blocks are the same. The only differences are the E34 M20 block has the dipstick in the oil pan rather than the side of the block, and I believe the iX block is iX specific as well.

Most other info can be found here:

http://www.e30tech.com/forum/showthread.php?t=52085

Simple_Smith · 04-02-2012, 02:51 PM

Alright coolio. The one thing I couldn't find was specs for was deck height. Maybe I wasn't looking hard enough, but if you have a link to all the specific block info that would be awesome.

acolella76 · 04-02-2012, 01:50 PM

Simple math tells me that the piston will sit 2.5mm lower (5mm shorter rods) below the deck, so to get it to sit 0.5mm the block has to be cut 2.00mm. Machine shop confirmed this.

Originally posted by Simple_Smith

Alright sounds good. Another think I'm wondering about is if I will need to have the piston skirts machined at all. I know that can be an issue with the m52 crank

Nope you will be fine!

Simple_Smith · 04-02-2012, 08:44 AM

Alright sounds good. Another think I'm wondering about is if I will need to have the piston skirts machined at all. I know that can be an issue with the m52 crank

acolella76 · 04-02-2012, 04:32 AM

Originally posted by The Humjet

2mm that's a lot of cuts on the mill. What deck height will that result in? Zero?

Can't remember. I am going to be taking my block to a machine shop today for the same setup, going to tell them I want the pistons to sit 0.5mm below the deck like my late 2.8 motor. I will report back with how much they took off.. which should be 2mm i think

The Humjet · 04-02-2012, 03:54 AM

Originally posted by acolella76

You know you will have to deck the block around 2mm for those pistons to work, right?

2mm that's a lot of cuts on the mill. What deck height will that result in? Zero?

Simple_Smith · 04-01-2012, 05:59 PM

its an 885 head on it already. thought i mentioned that. my bad.
kind of a long story but when i bought my car a year ago, i got it for 850 bucks with a bad water pump. got it home, did the water pump, timing belt. summer comes and i go to the junkyard, pull an 885 head and intake (and all the stuff for 1.3) pull the intake manifold off my car and it has an 885 head already and the block has 26 05 88 on it. my car confuses me lol. i hate not knowing exactly whats in it.

Acolella, thanks for the info on that. that was one of the things i was wondering about.