m44/m42 spec rally engine
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sh123

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Re: m44/m42 spec rally engine
« Reply #30 on: May 05, 2015, 05:23:17 PM »
So engine has now been taken out, awaiting to be stripped.

Parts arrived this morning so will get some pics up asap, pistons are insanely light.

I might get my engine builder to sort bearings out now.

Anybody know if m42 and m44 valves are the same?

Cheers
Sion
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sh123

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Re: m44/m42 spec rally engine
« Reply #31 on: June 02, 2015, 04:49:47 PM »
Need some advice guys.

Been doing tons of research into larger valves and better springs for the m44 head. Found more or less nothing!

What i need to know is can a m42 head be put into a e36 which had a m44 engine in? I belive that there are water pipes at the rear of the m44 but not m42? Im sure this can work easilyenough, and i think cam sensor are different? Can they beswapped over? And inlet but ill stick to m44 inlet.

I find that there aretons of m42 valves, springs, cams, lifters etc. But nothing at all for m44 unless id go custom which means more £££ or $$$ :D

Also are m20 and m42 harmonic  dampeners interchangeable? Struggling to find one.

Nothing to update on build atm other than everythings stripped ready for machinist.


Cheers
Sion
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sh123

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Re: m44/m42 spec rally engine
« Reply #32 on: June 02, 2015, 05:59:33 PM »
would I be right in saying if i fitted the m44 upper timing case along with trigger wheel on the cam and m44 sensor on to the m42 head it would work? As I have found that m42 takes the cam timing off the exhaust? and the m44 takes the cam timing off the inlet i belive? also both sensors are different?

This would just leave me with the the water supply at the back to sort?
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benz-tech

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Re: m44/m42 spec rally engine
« Reply #33 on: June 02, 2015, 10:23:50 PM »
This is what I plan on doing. It looks like it will work but it will be a few months before I can verify. I have both timing covers and sensors just in case. My end goal is to run the M44 ECU etc in my E30.
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Pi is apparently the multiplier for your engine swap budget as well.

Darky

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Re: m44/m42 spec rally engine
« Reply #34 on: June 03, 2015, 03:53:06 AM »
Hi

Check the different sensors with a multimeter! See if they have the same resistances.
Keep us updated Benz tech that's a nice plan with running m44 ecu.

Cheers Rohan
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sh123

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Re: m44/m42 spec rally engine
« Reply #35 on: June 04, 2015, 02:13:28 PM »
Slight set back. Builder who was going to do my block has suffered a stroke so im now bavk to square one. Struggling to find someone who isnt going to charge a fortune! And who is willing to fit valves :/
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Darky

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Re: m44/m42 spec rally engine
« Reply #36 on: June 04, 2015, 06:18:08 PM »
Hi
Sh123 where are you located?
Cheers
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sh123

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Re: m44/m42 spec rally engine
« Reply #37 on: June 05, 2015, 12:03:17 PM »
Hi

North wales,  UK.

Are these the correct vag lifters for m42? https://vwheritage.mobi/GB/productDetails.cfm?iItemID=102679797
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Darky

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Re: m44/m42 spec rally engine
« Reply #38 on: June 05, 2015, 06:52:49 PM »
Hi sh123

I'm in oz, so I can't recommend anybody.
But someone should be able to recommend somebody.
As for those lifters, I know that some 35 mm vw lifters do fit not sure whether it's those ones.
But it is on this site!

Some of us went to 33 mm lifters from m52 cam tray cut down though.

Cheers Rohan

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sh123

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Re: m44/m42 spec rally engine
« Reply #39 on: June 06, 2015, 05:35:05 PM »
Thanks for the reply Rohan!

Need some input/estimations from you guys now.

im quickly realising the cost of building an engine haha

So im looking to see if cost of head is justifiable or atleast can stay like is for now.

how much power will i be looking at with a 2.1 block 12:1 compression, ported head with stiffer valve springs everything else stock?

how much more power am I looking at from 35mm and 31.5mm Valves? seems that head work jumps up quite a bit when putting larger valves in.

Im considering putting the larger valve idea to the side for now. and concentrating on getting the block together and engine back in as I have a few events coming up after August so im getting quite tight for time now.

Also i have plans for a close ratio gear box.

cheers!
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Darky

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Re: m44/m42 spec rally engine
« Reply #40 on: June 07, 2015, 03:59:09 AM »
Hi sh123

Please tell me your name?
There are a couple of reasons to put different valves, springs guides etc. the best is to get rid of the 7 mm stem.
The other thing to consider is that the power is in the head.
Also nothing stoping you from doing the bottom end and then doing the head later.
Just with 12.1 2.1 lightened crank and 6 mm 33 mm 30.5 mm valves you will still be around 200  with a good tune.

Cheers Rohan
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sh123

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Re: m44/m42 spec rally engine
« Reply #41 on: June 07, 2015, 05:23:23 PM »
Hi rohan,

My names sion

Well im thinking putting appropriate cams with better lifters and springs and maybe getting the valves fitted at a later date

200bhp attheflywheel still sounds reasonable!

Has anybody had experience with dbilas springs? Cant find that much info on them.

Cheers
Sion
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sh123

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Re: m44/m42 spec rally engine
« Reply #42 on: July 15, 2015, 05:26:56 PM »
hi,

not much happening at the moment but hopefully in the next couple of weeks it will start coming together, or atleast the block and head will be sent away to be assembled.

one major issue I have is conrod bolts. I will be using standard m44 conrods, but I can not find any uprated bolts anywhere ( +I havent rang around however)

are there bolts I can use from other engines (6cyl bmw?)

or will standard bolts be fine? im not planning on reving over 7200 for now.

also looking for input on these

http://www.dbilas-shop.com/Products/Valve-spring-sets/BMW/M44/Valve-spring-set-for-BMW-318is-Z3-16V-M44-with-6-mm-valve-stem::7089.html

im looking at getting cam reground for now. and building a decent head in year or two.

cheers
Sion
« Last Edit: July 15, 2015, 06:14:06 PM by sh123 »
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Darky

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Re: m44/m42 spec rally engine
« Reply #43 on: July 20, 2015, 04:53:26 AM »
Hi
Standard is fine at that rev limit.
Cheers Rohan
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sh123

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Re: m44/m42 spec rally engine
« Reply #44 on: July 27, 2015, 03:13:04 PM »
Quick question for you

Do usa spec s50/s52 valve springs fit the m42?

The s50/s52 usa spec uses the same valve spring as my euro spec m44.

Now as im writing this ive recieved a message of supertech saying they are the same. But you guys may as well tell me just to be sure.

Update on the build: had a quote to build complete engine which came to £3000 off a highly regarded engine builder but its a bit high as cams, valves, springs or even enlarging the valve seats was not included. So im doing the assembly myself now. Therfore if you guys come back with a good answer its having +1 oversize supertech valves and springs and the head sent away for gas flowing and cnc head porting. And block should be sent for boring in the next week or two.
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