Can we talk Horsepower?

[Hodgepodge]

OK, we all love our 2002s and, of course, they are a blast to drive.  Nobody owns a 2002 because it is a rocketship, but I've been thinking about the M10 engine and what it "might be" capable of.  The stock 2002 engine is rated at something like 107hp and the tii produced 130.  Granted, that produces a decent power-to-weight ratio, but that 107hp was with a single barrel solex carb.   Nearly all of us have replaced that Solex with a Weber or 2.  Emissions controls outside of California have come off, and exhaust systems , cams and in some cases cylinder heads have been tweaked.  I'm not really looking for a king-of-the-hill number, but I am curious.  What are these engines capable of.  I mean....the S14, which produces something like 235hp max, is based on the M10 block, right? 

 

Has anybody dyno'd their M10?  I'm very curious to know what a modified M10 with, say, a 292 cam and 38/38 carb would generate.   But mainly I'm curious to see real numbers on any and all M10 set ups.  

 

If you have any numbers, please post them here.    Thanks!  

Edited June 22, 2019 by Hodgepodge

[Doug Riparetti]

S14 with (4)-44mm round-slide Mikuni motorcycle carbs, I'm 209 to the rear wheels. I never did dyno my M10 when I was running the (4)-36mm round-slide Mikuni motorcycle carbs

[revolve40]

Korman estimated my 2.3 stroker (S14 block and crank, E12 head with 47/39 valves, Weber 45’s, Schrick 304) to be 190-200 crank. Plan to get it on the dyno this summer.

[Doug Riparetti]

7 minutes ago, revolve40 said:

Korman estimated my 2.3 stroker (S14 block and crank, E12 head with 47/39 valves, Weber 45’s, Schrick 304) to be 190-200 crank. Plan to get it on the dyno this summer.

That's sounds about right to the crank

[Hodgepodge]

41 minutes ago, revolve40 said:

Korman estimated my 2.3 stroker (S14 block and crank, E12 head with 47/39 valves, Weber 45’s, Schrick 304) to be 190-200 crank. Plan to get it on the dyno this summer.

What is your carb set up?   And how, exactly, does the S14 block differ from the M10 block?  Kind of surprising that an E12 hed will fit on both. 

[jrhone]

Not surprising. The S14 was based in the M10.  Its why its one of the easiest swaps.  For a m10 with a cam exhaust and sidedrafts you are looking at 140-150hp.  There are TONS of horsepower threads with dynos and engine specs.  Use the search forum. You are not the first around here to ask about hp for the m10.  

[rms_sandiego]

 

30 years go, BMW built a 1350 hp engine for Formula 1 cars

 

based on the m10 block...

 

(well you did ask what they were capable of...)

Edited May 21, 2019 by rms_sandiego

[Doug Riparetti]

S14 block can run larger pistons, I'm running 94.5mm. The standard M10 block is safe around 90mm

[rstclark]

A very practical and easily street motor prescription  is:

9.5 :1 Compression  

292 cam

38/38 with port matched manifold

Long tube header

Balanced 

Spec toleranced 

May produce 150 hp depending on the quality of the work

Most likely it will be a little less on a dyno

I believe there are dyno results out there if you search

 

[Hodgepodge]

35 minutes ago, jrhone said:

Not surprising. The S14 was based in the M10.  Its why its one of the easiest swaps.  For a m10 with a cam exhaust and sidedrafts you are looking at 140-150hp.  There are TONS of horsepower threads with dynos and engine specs.  Use the search forum. You are not the first around here to ask about hp for the m10.  

If there were any S14s left....     I don't know why but this search engine never seems to return the right stuff when I use it.  I oddly get more relevant BMW2002faq results when I use the actual google database...... strange but true.  I'll look again.  

[Hodgepodge]

1 minute ago, rstclark said:

A very practical and easily street motor prescription  is:

9.5 :1 Compression  

292 cam

38/38 with port matched manifold

Long tube header

Balanced 

Spec toleranced 

May produce 150 hp depending on the quality of the work

Most likely it will be a little less on a dyno

I believe there are dyno results out there if you search

 

Except for a short header, that is exacty the set up I have on my Chamonix 2002.  Much peppier than my stock (32/36) Polaris.  

[ray_]

5 minutes ago, Hodgepodge said:

If there were any S14s left....     I don't know why but this search engine never seems to return the right stuff when I use it.  I oddly get more relevant BMW2002faq results when I use the actual google database...... strange but true.  I'll look again.  

Search like this:

 

https://www.bmw2002faq.com: s14

[AceAndrew]

 

 

I've posted this a couple times, but here's a general range.  These are STREET-specific build numbers.  Race gas, race cams, race compression, race parts (dry sump), are not factored in.  I've also left out Turbo's, as that's also highly variable.  Still waiting on enough reliable data for stroker M10 engines, most builders are tight-lipped.

 

>100whp Typical stock US-spec M10

110-120whp M10 with 284 cam and 38/38

110-120whp M10 with kuglefischer (tii)

115-130whp M42 Std.-miles used stock engine

115-140whp M10 Stg. 1 Street Hot Rod M10 (9.5:1 comp., 292 cam, stock 135mm rods) (38/38, 40DCOEs, 318i efi)

130-145whp M42 Refreshed/Rebuilt (w/ chip)

130-145whp M10 Stg.1 Street Hot Rod M10 (as above internals) (w/ ITB's [efi])

130-150whp M10 Stg. 2 Street Hot Rod M10 (10:1 comp., 300ish cam, 144mm rods) (same intake options as listed for the Stg.1) (generally, this is a teensy bit more than what 91octane CA gas can handle).

140-155whp M20 2.5L Std.-miles used stock engine

165whp M20 2.5L Fresh Stock Rebuild (new 1/2 over bore w/ factory replacement 8.8:1 pistons) (Typical Spec-E30 rebuild)

165-175whp S14 2.3L Std.-miles used stock engine

175whp M20 2.5L w/ MAF conversion, 17lb/hr injectors, and 272cam

175-180whp M20 2.7-2.8L "budget stroker" conversion

180-190whp M20 2.8L "Intro-stroker"

180-210whp S14 2.3L (freshened w/ non-radical upgrades)

200-230whp M20 2.9L (done decently) ("Ultimate Street Stroker Spec" yield upper end of this estimate)

210-240whp M20 3.0/3.1L

 

 

 

Edited May 21, 2019 by AceAndrew

[TobyB]

Quote

Has anybody dyno'd their M10?

 

 

no.

 

Quote

9.5 :1 Compression  

292 cam

38/38 with port matched manifold

Long tube header

Balanced 

Spec toleranced 

 

120ish.  Assuming average stock distributor.

 

t

 

[tech71]

Interesting thread, I've been wondering about this a bit.Today  I'm picking up an M10 that "ran decent before pulled". All I really know is it came out of a 74 and it has an E12 head.

Hope to freshen up as required and add a moderate amount of ponies.

I love engines, working on this one in my garage this winter is going to be awesome.