Can we talk Horsepower?

[d.hitchcock]

My M10 is rebuilt with 9.5:1 pistons, 292 cam, electronic ignition and EFI with an aftermarket ecu.

Made 127.5 whp and 125.5 ft-lbs on a dyno-jet nicknamed "the disappointer." ?

Edited May 21, 2019 by d.hitchcock

[Hodgepodge]

2 hours ago, d.hitchcock said:

My M10 is rebuilt with 9.5:1 pistons, 292 cam, electronic ignition and EFI with an aftermarket ecu.

Made 127.5 whp and 125.5 ft-lbs on a dyno-jet nicknamed "the disappointer." ?

What kind of EFI qand ECU? 

[d.hitchcock]

It uses the e30 318i intake and fuel rail, an e36 318i throttle body, and an Electromotive TECs ecu.

 

Edited May 21, 2019 by d.hitchcock

[Hodgepodge]

12 minutes ago, d.hitchcock said:

It uses the e30 318i intake and fuel rail, an e36 318i throttle body, and an Electromotive TECs ecu.

 

Very nice!  

[M3M3]

and of course "WHP" in not an absolute number.   the same car on three different chassis dynos will produce three very different whp numbers.   comparing whp numbers between different setups or cars is useless unless done on the exact same dyno in the same atmospheric conditions.  

[Preyupy]

Even Engine Dyno's differ from day to day and dyno to dyno.  I find Chassis dynos to be the most variable from one to the other.  Some are calibrated in Shetland Ponies and others are calibrated in Clydesdales.  I have not spent much time on the dyno with street engines so anything with a 32/36 or 38/38 carburetor or any camshaft under a 304 is something I just have not played with recently.  

 

I have a 2313cc 2 valve M10 (92mm bore S14 EVO 87mm stroke crank) with a 336 cam on 48mm DCO carburetors that made 249 hp @ 8000 rpm (at the crank)  but it's not much of a street engine (13:1 compression ratio means Race Fuel @ $11/gal).   

Edited May 21, 2019 by Preyupy

[pksurveyor]

02 is not about horsepower.  It is a 50 years old automobile.  My 02 is the slowest car in the garage.  So what, it is your driving experience that matters. 

[Hodgepodge]

23 minutes ago, pksurveyor said:

02 is not about horsepower.  It is a 50 years old automobile.  My 02 is the slowest car in the garage.  So what, it is your driving experience that matters. 

Yes, but not really my point.  I'm really just trying to figure out what a "good number" is for a reasonably well built M10.  Most people don't have a stock, single solex M10 anymore.   I like your stacks, BTW.  Hoping to build a garage soon so I can have 1 working bay and 4 or 5 stacking bays.  Then the driveway can be for cars that can get wet.  :-)  

Edited May 22, 2019 by Hodgepodge

[d.hitchcock]

I dunno, BMW seemed to like the idea of adding power to the base 02. lol

On the other hand, the thought of a 500-hp "Gr.5" 02 strikes me as pure overkill. I am a momentum car guy, at heart.

 

[tech71]

7 hours ago, d.hitchcock said:

My M10 is rebuilt with 9.5:1 pistons, 292 cam, electronic ignition and EFI with an aftermarket ecu.

Made 127.5 whp and 125.5 ft-lbs on a dyno-jet nicknamed "the disappointer." ?

That sounds about perfect for me. Hows the idle with a 292 cam?

[d.hitchcock]

A tiny bit lumpy. Not bad at all.

[M3M3]

292, 9.5,  dcoe's,  no "lumpy" at all.  idle perfect.

 

292 is a really mild cam.  there should be no idle issue.

 

 

Edited May 22, 2019 by mlytle

[jgerock]

32 minutes ago, mlytle said:

292, 9.5,  dcoe's,  no "lumpy" at all.  idle perfect.

 

292 is a really mild cam.  there should be no idle issue.

 

 

My muffler is now much louder!  Wish my car idled that smoothly.

[Conserv]

38 minutes ago, mlytle said:

292, 9.5,  dcoe's,  no "lumpy" at all.  idle perfect.

 

292 is a really mild cam.  there should be no idle issue.

 

 

 

Impressive, Marshall!

 

Are you using stock motor mounts — there’s virtually no engine rock when you add revs?

 

Best regards,

 

Steve

 

[M3M3]

That was stock engine mounts.  New, with the drivers side restriction bar bent down.