Author Topic: 2.0l M42 (Read 59428 times)

KidneyBoy · « **Reply #15 on:** October 22, 2008, 05:26:26 PM »

Quote from: 1991 E30 M42;59185

I am so glad that someone posted something on here that didn't involve a turbo. Thank you so much, I thought we were being invaded by Honda kids that got their hands on a BMW and want to put a fart can and a turbo on everything. Check out the thread on my build with m44 crank rods and pistons in an m42 block that came out to 1917cc. here if you want to know anything in particular about the build process or any specs or prices, just post it or shoot me a PM.

Any idea how much power your making? I want to get up to the 180hp range, without going too overboard.

1991 E30 M42 · « **Reply #16 on:** October 22, 2008, 10:16:44 PM »

on what kind of dyno? mustang or dynojet , dynojets are what most people use because they give higher numbers and make their customers happy, mustang dynos are more accurate and always give lower numbers

GrindCulture · « **Reply #17 on:** October 23, 2008, 11:54:05 AM »

I'm planning on building a 2L M44 using an M47 crank at some point, it might end up getting turboed (would seem silly not to, seeing as it'll be on megasquirt anyway). I'll then drop it into my touring, should be nice and different with shed loads of torque

. It's a long way off, and I might change my mind (again) and finally give into the 6 pots, or another 4 pot turbo (something Swedish

)

hoevesruperd · « **Reply #18 on:** October 23, 2008, 05:48:32 PM »

what about engine management for these 3 options?
i'd be looking to bore or stroke my engine too when it comes the time for a rebuild but the high prices of fuel and spark management like the megasquirt is a worry. is there a a chance that an option would work with a simple chip?

KidneyBoy · « **Reply #19 on:** October 23, 2008, 11:12:52 PM »

I dont see why it wouldnt work with stock management. the TDC and valve timing does not change. The only thin i could see would be larger injectors and a RRFPR [rising rate fuel pressure regulator]

nTranced · « **Reply #20 on:** October 27, 2008, 09:45:50 PM »

what would the compression ratio be with the s50 piston m44 crank combo, also is there a combo out there that would drop compression.

I wonder what a 135mm ETA rod would do. I'm used to m20's and new to the 4 pots so could someone fill me in on this if you dont mind.

By the way, I've never owned a Honda but I own a turboed M42 E30 project.

crazzy_hippo · « **Reply #21 on:** October 27, 2008, 11:23:20 PM »

Hi! Any idea what conrods and pistons can I use for the 88mm diesel crank? I am planning for a boosted M42 using the M47 crank but not sure what combination of pistons and con rods I could use. I am trying to hit a compression of around 9-10:1 and running 1bar on the supercharger (using an Eaton M90).

I am aware of MM parts but they are rather pricey. Thus looking for other brands like Wossner, Arrow, Wiseco etc.

nTranced · « **Reply #22 on:** October 28, 2008, 12:17:07 AM »

someone needs to do a sticky on this forum with all the specs to keep repeats of the same questions down.

hesgone2fast · « **Reply #23 on:** October 28, 2008, 02:37:37 AM »

People, please do a little research, I know its easier to ask first, but, it gets a little annoying to answer the same questions all the time...

Anyways, With the M47 crank, you can use M40 rods(135mm), S52 rods(135mm), M42 rods (140mm), M44 rods (140mm), maybe rods from M50, but not sure on this one...the stock pistons sit 0,15mm above block deck(TDC). and yield 10:1 CR,
With the M47 crank, and same rod lenght(140mm) and same piston (stock M42), the piston would be 3,65mm above deck (Impossible to work, would have to be shaved at least 3,5mm), shaved to 0 deck height would have 10,6:1 CR
With 135mm rod,M42 piston, and no shaving, the piston would be about 1,35mm below deck and 9,3:1 CR but only with 1951cc.
With 135mm rod, S52 piston(86,4mm) and no shaving, the piston would be 1,35mm below deck, 9,8 CR, and 2064cc.

hesgone2fast · « **Reply #24 on:** October 28, 2008, 03:50:10 AM »

Quote from: nTranced;59595

what would the compression ratio be with the s50 piston m44 crank combo, also is there a combo out there that would drop compression.

I wonder what a 135mm ETA rod would do. I'm used to m20's and new to the 4 pots so could someone fill me in on this if you dont mind.

By the way, I've never owned a Honda but I own a turboed M42 E30 project.

S50 piston (86mm) and M44 crank(83mm), and stock 140mm rod,the piston would have to be shaved because it would be above block deck too much, so with 0 deck height, the CR would be 10,5:1, and 1929cc.

ose30 · « **Reply #25 on:** October 28, 2008, 04:33:22 AM »

Is there a difference when compared M40B18 (European 318I) rod lenght to M42B18 (318IS) to each other? Is that M40 rod lenght you mentioned 316I M40 rod lenght or 318I M40 one?

KidneyBoy · « **Reply #26 on:** December 19, 2008, 06:53:11 PM »

12/19/08

NEW M47 crank on the way [$840 + shipping]

Have 3, yes 3, S52 pistons and 4 s52 rods. [blown up motor at a friends shop]

Pics to come once i get moving. My spare m42 is still all together.

hesgone2fast · « **Reply #27 on:** December 21, 2008, 05:19:49 PM »

I have two spare S52 pistons... they come from a blown engine as well, but they can be used, 22mm piston pin. 86.4mm bore.

crazzy_hippo · « **Reply #28 on:** December 21, 2008, 10:25:02 PM »

Quote from: ose30;59608

Is there a difference when compared M40B18 (European 318I) rod lenght to M42B18 (318IS) to each other? Is that M40 rod lenght you mentioned 316I M40 rod lenght or 318I M40 one?

http://www.m42club.com/forums/showthread.php?t=7099

Here is a great thread about the rod lengths.

crazzy_hippo · « **Reply #29 on:** December 21, 2008, 10:25:34 PM »

Quote from: KidneyBoy;63228

12/19/08

NEW M47 crank on the way [$840 + shipping]

Have 3, yes 3, S52 pistons and 4 s52 rods. [blown up motor at a friends shop]

Pics to come once i get moving. My spare m42 is still all together.

Great to know that your crank in on its way!!