Author Topic: Running M44 build!  (Read 33512 times)

Darky

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Re: M44 build
« Reply #45 on: June 05, 2015, 07:30:59 PM »
By big cam you mean your 212 deg 9.7mm? From memory!

benz-tech

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Re: M44 build
« Reply #46 on: June 06, 2015, 12:31:55 AM »
Well, 9.9mm but yeah I put 'big' in quotes. My Datsun cams were 13mm and 280deg advertised. 240 something at .050".  But then the ports were the size of  straws so getting 7k out of that engine was a bit painful.
Pi is apparently the multiplier for your engine swap budget as well.

benz-tech

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Re: M44 build
« Reply #47 on: August 14, 2015, 12:24:58 AM »
Everything in the foreground will be in that E30 by Monday. EWS, DME, MAF, knock sensors and all. Hope it runs.
Pi is apparently the multiplier for your engine swap budget as well.

wazzu70

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Re: M44 build
« Reply #48 on: August 14, 2015, 05:19:51 PM »
Nice!!
-Nick
91 E30 M42 with VEMS

benz-tech

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Re: M44 build
« Reply #49 on: August 18, 2015, 10:28:03 PM »
IT LIVES!!  Engine started on the second try and eventually settled down to a slightly lopey idle. Hit my IG account to see and hear it run: 320ie30
Pi is apparently the multiplier for your engine swap budget as well.

jrw21

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Re: Running M44 build!
« Reply #50 on: August 20, 2015, 08:23:44 PM »
Congrats man! Glad to hear its running!

Warsteiner

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Re: Running M44 build!
« Reply #51 on: August 20, 2015, 11:10:24 PM »
Awesome!! 8)

Cheers,
~Ralph

varg

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Re: Running M44 build!
« Reply #52 on: August 22, 2015, 07:21:46 PM »
Cool build! What are your plans for it? ITBs? Or just faster-than-it-was-stock NA street car?

I used the head and headgasket cc numbers in this thread to satisfy my curiosity for my real compression numbers, played with the calculator until I got it to say ~10:1 with the stock numbers, which left me with 8cc for the stock pistons, FWIW. Came out to 8.7:1 compression ratio with the .120" headgasket, a little lower than I would want ideally, maybe I should've picked the .098" one, but I didn't have this info when I bought it. The engine has held  up and doesn't ping too terribly easily so I'm not complaining. A .3 static difference probably doesn't mean all that much for my use.
I used:
Bore: 84mm
Stroke: 81mm
HG Bore: 86mm
Compress HG: 1.6mm
Combustion Chamber: 33cc
Piston volume: 9cc
Piston deck clearance (Above): 0.15mm
« Last Edit: August 22, 2015, 07:33:31 PM by varg »

'91 318is, stock internals, T3/T04E 50 trim/.48ar, coilovers
project thread

benz-tech

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Re: Running M44 build!
« Reply #53 on: August 22, 2015, 10:40:07 PM »
Thanks everyone.  I got to drive it for the first time today.  Of the entire build, on thing stands out above everything else, for good or bad.  BIG intake cam. My idle quality is very lopey, and I mean as bad as my Datsun was with a 240 @ .050" cam.  I double checked my timing and it is dead on factory using the tool.  Now the good: 4,500 rpm comes along and oh boy the throb from the intake is near (dare I say) v-tec glorious. The combination of compression ratio and larger displacement has kept the low-end in tact, although it's not as strong at 2k as my late cam old eng. By 3k its pulling harder and just gets better from there. Might need to gopro under the hood to share the sound. Its fantastic! I suppose I might be willing to give up some driveablilty if I can improve the idle quality just a bit, but since I thinka MAF is very sensitive to intake pulses, I doubt I will be able to. I do plan to set cams using cat cams data and maybe that will help a bit.
plans are dd only, its my main form of transportation. Itb's just arent in the budget. I wonder if there is much improvement over  an e30manifold. I have an e36 mani to compare once I iron out some more bugs and get it broken in.
Pi is apparently the multiplier for your engine swap budget as well.

benz-tech

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Re: Running M44 build!
« Reply #54 on: September 13, 2015, 09:19:31 PM »
COP kit installed. And an update. I've pretty busy lately, but I had time to get the cop kit in. Got the a/c hooked up but it's only useable when rolling since it will kill it at idle. My idle is better and has learned up to around 900rpm. Still have some bugs tho. I have a few noisy lifters, and my guess is that they are under that reground intake cam. I'm working on the 33 lifter upgrade now and I have a set of s52/m44 beehive valve springs. Real OEM says they're the same and I saved them when I gutted the m44 head and hopefully this cures the noise, BUT I have a bad feeling that the machine shop topped the intake valves too much. I really hope I don't have to replace them but I'll try the lifters first.
I smoked the intake and it does not have a vacuum leak. My lifter issue might be compounding the idle quality what with different lifts and durations in a few cylinders. I might just need to set the cams up specifically instead of relying on the factory tool.  It just idles like it has a lot of overlap.

As far as power is concerned, it is definitely stronger than the worn m42 it replaced, a good 20 ft lbs of torque. The wierd part is the top end is a bit flatter  than I expected but the last time I watched the data stream it was higher than 14.7 based on the o2 readings. It will definitely need a tune. Nothing will make power that lean.



I also wanted to post some of the issues already overcome.
The h/p power steering hose fitting is 12mm and the m44 is 14mm. I used a time sert on the banjo bolt.
With a bit of massaging the e30 a/c lines work but my idle isnt stable enough to stay running. I tried 12v and grounding the ac input into to the dme withno luck. Still working on that.

The dipstick needed to be bent perfectly to weasel around the belts.
When running e30 manifolds, the iac valve on the throttle body won't fit. I tapped fittings onto the m44 iac valve and  ran hoses to the appropriate ports on the manifold and e30 throttle body
The e36 exhaust manifold is just barely different (or something else is) and I had to reweld my cat.  Still hits a bit over he right bump.
I made the cop harness from the e30 bits and used the afm pigtail to attach to the dme harness.  Its so clean and stock looking.
« Last Edit: September 13, 2015, 11:11:20 PM by benz-tech »
Pi is apparently the multiplier for your engine swap budget as well.

Warsteiner

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Re: Running M44 build!
« Reply #55 on: September 13, 2015, 09:40:45 PM »
Glad to hear that it's up and running!!!  Get to a dyno and see where you're at with AFR's.  Keep looking for a vacuum leak if you can. You should have a good idle. If you can't find a leak then you'll need to tune it which is what I suggest anyway since it's a completely different motor now! 8)

Good luck with it and enjoy the ride....

Cheers,
~Ralph

benz-tech

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Re: Running M44 build!
« Reply #56 on: September 13, 2015, 11:20:36 PM »
Glad to hear that it's up and running!!!  Get to a dyno and see where you're at with AFR's.  Keep looking for a vacuum leak if you can. You should have a good idle. If you can't find a leak then you'll need to tune it which is what I suggest anyway since it's a completely different motor now! 8)

Good luck with it and enjoy the ride....

Cheers,
~Ralph
its very lean at wot, like above 14.7 lean. Will absolutely need a tune. Verfied no vacuum leaks. I think that 5.2 doesnt like intake pulses at idle at all.  Fuel trim is pulling back 5% at part load - maybe because of the inefficiencies of the cams and e30 inkake- and this is killing the top end when it really needs some fuel. I have a wideband sensor, I just need a guage to read it 

Don't get me wrong, it has more top end than the old motor, but for an engine that was builtfor top end to be torquier thantthe outgoing means there's a lot coming in the tune. Time will tell.
Pi is apparently the multiplier for your engine swap budget as well.

Darky

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Re: Running M44 build!
« Reply #57 on: September 14, 2015, 03:41:52 AM »
Try dialling up the vaf.
Should help at the very least with ratio providing it's running lean across the entire rpm range.

Nice work though!

Warsteiner

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Re: Running M44 build!
« Reply #58 on: September 14, 2015, 11:14:01 AM »
ok...I would not drive the car at anywhere near full throttle 60% or above until you get a tune. Lean  = Kaboom :-\ Just putt putt it to your dyno shop.

Spend the time and dial it in on a dyno with a good tune.

Cheers,
~Ralph



benz-tech

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Re: Running M44 build!
« Reply #59 on: September 14, 2015, 01:51:36 PM »
Try dialling up the vaf.
If only I had one.
Pi is apparently the multiplier for your engine swap budget as well.