m44/m42 spec rally engine

[wazzu70]

Good cams are going to be way more benefit than a valve and spring upgrade and port work. The valves are still a nice upgrade though if they are one piece versus two piece for reliability.

[Darky]

Hi Sion

We don't get the U.S. S5* engines here in Australia so I can't help you with that question.
We get the euro s5* engines like you.

Cheers Rohan

[sh123]

The guy thats going to do the head can do custom  cams for me.  So ill just get him to spec them for me.

Cheers
Sion

[sh123]

Right, abit of an update today. So the engine is booked in to be built by a engine builder. I gave in at the end. He is going to sort czms and everything out for me and hes going to look into possibly a valve job depending on cost.

Not a huge updat but itll be sent early next week. Maybe because it will be out of my hands the build will move on quicker

[Darky]

Hi Sion

These things take time, relax!
What head did you end up using?
Research and enjoy it.

Cheers Rohan

[sh123]

Hi rohan

Yeah i know. The engine has been out the car now for about 6 months, it just feels like ive got no where haha.

M44 head for now to keep cost down. I may look into a m42 head at a later date along with larger valves etc.

Cheers
Sion

[sh123]

...... so its gone to the engine builders.

Getting excited now. Got a lot to do to the car now before i put the engine back in.

[benz-tech]

You may have this sorted out by now but realoem has s52 and m44 beehive springs as the same p/n. I will run these (since I have a set from a cracked m44 head) as soon as I add 33mm lifters to the mix. I'm not sure they'd be up to the task with 35's.

[sh123]

hi,

it is the m44 head that im running now already, so will have these springs fitted.

I have asked the engine builder to have a look and give me feedback on his thoughts on going larger valves and what to do with the valve springs. as Im uncertain on their plans with the cams at the moment.

one thought/problem that has been going through my mind is the what to set the rev limit. Im unaware of what the stock valvetrain of the m44 head can take? and what about stock m44 conrods? and rod bolts? im going to look into this now, but maybe someone knows these answers allready.

regards
Sion

[Warsteiner]

Sion,
I run the beehive springs with my motor. I have 33mm buckets and 10.4mm lift on my cams and there is no issue.

I run my rev limit at 7500rpm's.

Cheers,
~Ralph

[benz-tech]

As far as the rods go, I saw no difference between an m44 rod and s52 rod other than the length. I have the stock balanced m44 rods and I'll be spinning mine to 7,500 rpm if it makes power that far up.

[sh123]

Great thanks for the input.

My main worry with the m44 is the roller rockers that the m44 have. Cant find any info at all and no info on their rev limit other than a few saying the m44 doesnt like rev. But no real evidence of this.

[sh123]

right so I have fitted my new radiator tonight. was a bit of a pain as the drain plug for the radiator was right where the strengthening bar for my sump guard is.

anyway I thought I had ordered the 328 radiator that has the expansion bottle stuck to it. (all this may be different on a e30 im unsure) baisiclly I know have to fit an expansion bottle to it. I could go ahead and fit it where my battery is like the e36 m3. but this seems like a lot of hassle. even through it may tidy the bay up a bit. and i may be fitting a non bmw bottle anyway(I work in a garage which recovers accident damage cars, so have plenty to hand)

my question is does the expansion bottle need to be at a certain height. where i have in mind may mean the bottom of the tank could be lower than the top hose.

[Darky]

Hi

The expansion tank needs to be just a little bit higher than the top of the radiator.
That way any of the air in radiator will eventually bleed out into expansion tank and cause no issues.

Cheers

[sh123]

Hi

Change of plan. Im moving the battery inside the car. So i will put the expansion tank where the battery is like the rhd e36 m3's

I have also ordered some injectors.

And im looking into a 6speed close ratio box out of a honda s2000, watch this space