Maximum HP

[andrewintraining]

Whats the most horsepower an m20 engine has put out to the rear wheels...? some ricer kid told me the most you can get it is 300

[swimstarguy]

If you go FI the sky's the limit.
If you go NA a reasonable streetable limit is around 210.

Some "race prepped" m20's have put down more but nothing close to 300 to the wheels, AFAIK.

You're friend's a ricer.


~Zar4

[andrewintraining]

I didn't say he was my friend
thanks

[swimstarguy]

I didn't say he was my friend
thanks

My bad, blind assumption.

http://www.metricmechanic.com/prices/pricing-engines.php

MM's "HiFlo" rally engine, for $9k, nabs 240 at the crank.

If you browse around you'll find some m20's with ITB's and massive cams putting down quite a bit NA but not too many; I've yet to see such a build put down 300, let alone 300 to the wheels. It's just not worth building out that engine because it's old, 12 valve sohc, and more funding and support went into other engines.

There are lots of turbo builds with more than 300 HP. Though that's completely different. Did this ricer mean 300 at the wheels without induction aids?


~Zar4

[andrewintraining]

I'm sure he was talking about with FI

Are M42's easy to come by?

[swimstarguy]

I'm sure he was talking about with FI

Are M42's easy to come by?

Sure?
If you look hard, it's easy enough. There are people around ditching them for newer engines so their comparably cheap. they're not the best if you're looking for NA power as they're not the fondest of spinning like other 4 bangers around (s14, b16, s42... >_>) Their high compression ratio and lack of knock sensors makes them last resorts for FI builds as well.

If you're looking for high horse power m42's aren't the way to go.
Check out m42club.com for more info.


~Zar4

[andrewintraining]

Errr
yeah I'm looking for an N/A but I want it to be a bimmer engine ;]

Like an e36 m3 engine ;]

[Andreas]

I am also interested in the max NA output of the M20 engine. I decided to give it a go. Hopefully it will be finished this year June / July.

Here is a pic of a mock install for fitment.



Provided there are no clearance issues with the Metric Mechanic pistons, the engine will feature a 304 deg Schrick camshaft. Some other specs : 7,500 rpm limit, billet rocker arms, Autronic standalone engine management, JB Racing lightweight aluminium flywheel, 3.1 stroker.

[Eliminator]

I am also interested in the max NA output of the M20 engine. I decided to give it a go. Hopefully it will be finished this year June / July.

Here is a pic of a mock install for fitment.



Provided there are no clearance issues with the Metric Mechanic pistons, the engine will feature a 304 deg Schrick camshaft. Some other specs : 7,500 rpm limit, billet rocker arms, Autronic standalone engine management, JB Racing lightweight aluminium flywheel, 3.1 stroker.

Wow, I like it! Can't wait for dyno numbers..

[CorvallisBMW]

^^ fucking awesome, keep us informed on your progress!

[andrewintraining]

Thats bad ass
You give me hope

[nando]

I don't care if it's expensive and inefficient, that's frigg'n badass

what CR and crank did you choose? the 10:1 MM pistons are non interference, but I bet that schrick would like the 11:1 pistons better..

[MR 325]

A built up and boosted M20 can easily do 400+.

I usually don't listen to what "kids" tell me.

[E30Idea]

A built up and boosted M20 can easily do 400+.

I usually don't listen to what "kids" tell me.

That is what I hope to hit on "dynoqueen days" but 300 on the street is reasonable at the rear wheels

[Andreas]

I don't care if it's expensive and inefficient, that's frigg'n badass

what CR and crank did you choose? the 10:1 MM pistons are non interference, but I bet that schrick would like the 11:1 pistons better..

Thanks for the compliments. I know that I can build a more powerful turbo M20 engine for much less money but I wanted to try this. The car is going to be used as a track car only - it is too much of a hijack risk to drive on public roads in South Africa. We generally have quite hot weather and most turbo cars only survive 2-3 laps before becoming too hot.

nando, I have the MM 3200 Rally, 86mm Forged Alusil pistons ( compression ratio 11:1 ) together with their H Beam, 138mm long conrods.



The crank I purchased locally at my BMW dealer to avoid shipping expenses and potential damage. I bought a E46 330i crank - 89.6mm stroke.

Here is a picture of my custom, floating brake disc setup. 330mm * 28mm discs with 4 piston AP Racing calipers.