My M10 Turbo (warning to 56k)

[Mr Deagle]

The S14 used 93.355mm pistons like my early euro M30. 92mm pistons came in M30B34s and B35s.

I thought that he was using an m3 crank and pistons to get the 2.3 liters, i didnt know that he had a custom crank for it......thats why i was said i was assuming it.

[euroshark]

the m10 block cant accept M3 sized pistons, unless you get a good block, im assuming that that is the problem, we will have to wait for what he has to say

The S14 used 93.355mm pistons like my early euro M30. 92mm pistons came in M30B34s and B35s.

[Good & Tight]

Stock bore of 1,8l m10 engine is 89mm
I'm planing to use "antique" m10 block from 1970's, it has same dimensions but it weights like 15kg more than 1980's 318i block or reduce bore to 90,5mm, but with 86mm stroke crank and 90,5mm bore wouldn't allow me to use high rpms.

After I find combination that will hold together, I'll be charging that stroker...

I always thought the older blocks "looked" thicker, my block is from 1978 with 91mm pistons no problems yet, even with nitrous.

[Rocla]

Please explain this - " used custom 86mm crank and 92mm mahle pistons, but I have serious problems with cracking blocks."

Stock bore of 1,8l m10 engine is 89mm

I have custom build 2,3l m10 engine in my 1985 318i. The engine has custom made 86mm stroke crank shaft(some 50 of those cranks were made in Finland on late 80's and early 90's). Block is bored to 92mm(piston are orinally ment for vw aricooled boxer engine). I've build that engine combination twice, both times my block has cracked, extreme bore makes block flexy and heat exapsion makes the head bolt holes(yes head holes, not cylinders) to crack to coolant passages.

I'm planing to use "antique" m10 block from 1970's, it has same dimensions but it weights like 15kg more than 1980's 318i block or reduce bore to 90,5mm, but with 86mm stroke crank and 90,5mm bore wouldn't allow me to use high rpms.

After I find combination that will hold together, I'll be charging that stroker...

[Jean]

the m10 block cant accept M3 sized pistons, unless you get a good block, im assuming that that is the problem, we will have to wait for what he has to say

Gotcha, well I have to say I am excited to see this thread! If there is a thread dedicated specifically what rods/bolts/pistons/gasket for m10 work correctly and will handle boost, maybe 250-300whp please point me to it as I plan on purchasing an extra m10 to get it build properly for this purpose.

[Mr Deagle]

the m10 block cant accept M3 sized pistons, unless you get a good block, im assuming that that is the problem, we will have to wait for what he has to say

[Jean]

Nice work!!

Please explain this - " used custom 86mm crank and 92mm mahle pistons, but I have serious problems with cracking blocks."

[Mr Deagle]

a

The intake will be ethier sheet aluminum/billet, or all billet...the turbo is going to have to drain into a catch can, then a porsche 930 scavenge pump driven off of the power steering pulley

also, there is going to be a wastegate, a porsche 930 unit, i need to get some pics up of the header in stainless

[Good & Tight]

Nice and clean lookin, I like the low mount setup. Will the oil drain without a pump?
Glad to see more people turbo the M10. What are your plans for the intake?

[Mr Deagle]

my pistons are 90.2 or something like that, i know its just over 90 mm

[Rocla]

For engine management, i am using an EFI Euro 96. Stock stuff is out the window. Im running wasted spark with a bosch coil pack. Inside the engine is a stock S14 2.3 crank, s14 rods and mahle pistons out of the GT40. Schrick 304 cam, stock valves and seats. ARP head and main studs. Final displacement is 2.15 liters.

I'm too lazy to calculate the bore, so tell me.

s14b23 crank has 84mm stroke?

I used custom 86mm crank and 92mm mahle pistons, but I have serious problems with cracking blocks.

I'm planing to use 90,5mm bore on my next engine, but stroke/bore ratio will not allow high rpms.

EDIT: I ran stock m10 rods.

[Mr Deagle]

that turbo is just for mock up purposes, the real one is going to have a stage 5 exhaust housing, i really have no idea what the compressor side is going to be

any u guys cant possibly want those rims

oh and im not going to be using a late 80's snail for a turbo....modern garret stuff for me

[misterlance]

I like the header design. Keep us updated.

[2002maniac]

how much for the rims?

[backtrail69]

WOW...that manifold will flow REALLY well. What size is that turbo? It looks ike a butt plug for how much that motor is going to flow.