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Engine + Driveline / M44 Deck Height

« on: December 26, 2011, 08:49:06 AM »

Where can you find the Mahle Piston catalogue?

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Engine + Driveline / M40 vs M42 clutch torque capicity

« on: November 08, 2011, 12:50:14 AM »

Hey guys,

I'm trying to find out some information regarding the difference between the M40 and M42 clutches in terms of their power/torque capicity.

I've done some research and found that the M42 clutches used in conjunction with the Downing Atlanta Supercharger kit have stood up really well with over 200ft/pd of torque which is great information.

My question is then related to using the M40 clutch and flywheel with a setup that has this sort of power - is the M40 clutch much worse in terms of power handling?

I cannot seem to find any information regarding this.

Cheers.

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General Topics / The mess under the intake

« on: December 09, 2010, 09:19:40 AM »

Awesome thread gents.

I'm in the process of installing some Ford Explorer 19lb 4-pintile injectors now on my E30 318iS and I forgot to order all of this stuff to clean up all the mess under the intake manifold.

I'm ditching the throttle body heater plate, its pretty ridiculous cooling system that runs through there! Only one of my hose ends is split so will put it all back together using all the old parts cos I need the car back on the road ASAP as it's my daily driver.

Will order a fresh set of hoses and such when my E36 is back on the road!.

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Engine + Driveline / Cam swap - Intake cam on exhaust side

« on: October 25, 2010, 08:45:31 PM »

Quote from: 1998ccc;97924

I "think" the information below is factory literature. The M42 240 deg / 9.7 data is the same as the M50 NV intake cam which makes sense since the engines are so simular.

http://www.motortraders.net/groups/group.asp?group=1&menu=89

The camshafts rotate in five bearing journals and are lubricated from internal cylinder head oil passages. The relatively short opening duration of 2400 combined with high valve lift (9.7mm) ensure good torque characteristics. The camshafts are of a hollow cast design for weight reduction.

I think this is definitely the most credible piece of literature out there on the M42 cams.

Funny that when the M50NV became the M50TU (VANOS) in 1993 they switched from the 240 / 9.7mm cam to a 228 / 9.0 cam as the VANOS could compensate for the loss in duration and the engine was able to produce the same peak power and have a fatter torque curve.

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Engine + Driveline / Cam swap - Intake cam on exhaust side

« on: October 25, 2010, 08:35:31 PM »

Cool research guys,

I found this on M50NVs which claims that its a load of BS:

http://forums.bimmerforums.com/forum/showthread.php?t=1116523&page=9

Apparently the cams cant actually be swapped in an M50NV? Maybe it will apply to M42s too seeing that the engines are basically from the same family.

Haha mate, I'm actually from Australia, not England. Spent 6 months in the USA earlier this year and I'm yearning to go back ASAP. Loved Cali!

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Engine + Driveline / Cam swap - Intake cam on exhaust side

« on: October 25, 2010, 08:25:29 AM »

The thing is that the cam specs for both intake and exhaust are the same for M50NV too yet there seems to be some sort of benefit in doing it.

Wouldn't be up to getting my intake cam reground - I had a mate put cat-cams on and it didn't ran really shit with his stock chip. It obviously needs a retune but the costs just add up too much and its not worth it for me as the 318iS is my DD and an E36 328i is my weekender!

If I could get an M42 intake cam for cheap somewhere and give it a go, that would certainly be worth a try!

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Engine + Driveline / Cam swap - Intake cam on exhaust side

« on: October 24, 2010, 05:59:05 AM »

Hey guys,

After doing a lot of trawling through bimmerforums, a common mod for M50NV engines is to get a spare intake cam and replace the exhaust cam with it.

Apparently its a good performance mod despite the fact that the cam specs are the same for both intake and exhaust - perhaps the specs are wrong?

Does anyone know if this is possible or has been done before on an M42?

Would be pretty awesome if this was a cheap cam upgrade mod for M42s!

Cheers.

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Engine + Driveline / Crazy idea: butchered m50 inlet manifold?

« on: October 13, 2010, 04:52:01 PM »

Quote from: 1991 E30 M42;97422

this was discussed years back, the ports are shaped differently and by the time your done with modifying and redoing everything you are better off spending the money on something else like a custom manifold and a programmable ems

Thanks mate!

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Engine + Driveline / Crazy idea: butchered m50 inlet manifold?

« on: October 13, 2010, 12:06:34 AM »

Smoother inlet porting and possibly better flow. You're right as there may be limited gains but was just wanting to ask if it had ever been done!

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Engine + Driveline / Crazy idea: butchered m50 inlet manifold?

« on: October 12, 2010, 05:29:19 PM »

Hey guys,

Has anyone thought of trying to fit the m42 with a butchered M50 inlet manifold? I'm thinking that it may fit seeing as the cylinder head of an M42 is essentially a 4 cylinder M50?

Judging by pics it seems the port size and spacing appears to be the same with the exception of the m42 inlet ports having additional port space for injector firing up the top.

Has anyone thought to cut 2 inlet ports and sealing the m50 manifold to make it fit an m42?

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Engine + Driveline / M30 AFM work on M42?

« on: October 18, 2009, 09:46:08 AM »

Hey guys,

I've done a lot of searching around and I can't seem to find much info on whether or not this is possible.

I've heard that with M20 engines you can run an M30 AFM as it is larger and less restrictive. Can this be done with an M42?

Before you say it cant be done, consider that some people with M20s swap the chip/electronic internals from their M20 AFM into the M30 AFM and it seems to work?

I'm going to the wreckers tomorrow and am likely to come across M30 AFMs for sure!

Leo.

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