TheSamba.com :: View topic - how come my 1340cc harley motor..............

Sun Aug 18, 2013 5:36 am

has more horsepower than my 1700cc vw motor?

Sun Aug 18, 2013 5:42 am

It may have more HP but does it has more torque?

Sun Aug 18, 2013 5:46 am

RASTAVAN wrote: has more horsepower than my 1700cc vw motor?

Apply full throttle to your Harley for 5 minutes straight and let us know the results, both to the engine and to you. :wink:

Sun Aug 18, 2013 6:06 am

Compare these numbers to a stock 2.0 Type 4's specs: 67HP @ 4200rpm and 101ft/lbs at 3000rpm.

Peak torque of 65ish ft/lbs at 2000ish rpms is rather low for a big, heavy vehicle. People with modified 1340s are getting much better specs, closer to the bus's specs, but then you've just spent another $2000 in engine upgrades. :wink: Not to mention that they probably develop peak HP at around 5000 rpms, which could be good or bad depending on your driving style and gearing.

Sun Aug 18, 2013 6:42 am

They're tempting you to put one in your bus :D .

Sun Aug 18, 2013 7:39 am

assuming you have an EVO or Twinkie...

40 years of head design development. Harley copied head and port design from auto manufacturers to meet emission requirements.

Sun Aug 18, 2013 8:14 am

cause it's a japanese designed engine.

why does my 1967 dastun 1500 cc have more hp than a 1979 vw 2000 cc

Sun Aug 18, 2013 9:37 am

TomWesty wrote: They're tempting you to put one in your bus :D .

Screw the engine, just paint the thing.

Sun Aug 18, 2013 11:48 am

I think the above graph I linked to is inaccurate.

Anyway, according to Harley,

http://www.harley-davidson.com/wcm/Content/Pages/Engines/EngineSpec_Evo1340CC.jsp?locale=en_US

The Touring version has 77.0 ft./lbs. @ 4000 RPM. 77 X 4000 / 5252 = 58.6 horsepower.

So, I mean, it has peak torque of about the same as a 1600, and higher hp, but again, the issue is the torque curve - torque is what moves you around. You would need to change your gearing to compensate...and you'd still probably accelerate slower...and in a bus, that's saying something. :lol:

Sun Aug 18, 2013 11:50 am

I torn down my new twin cam hd in 2004 after my wife passed me like I was standing still going up the hill to Reno on her air cool twin honda of smaller displacement. Mild build, & blueprinting, good pipe, good heads, good carb, netted 100 hp and 106 tq @ the rear wheel. Almost twice as stock and it ran cooler. Good parts, time and $.

Sun Aug 18, 2013 12:06 pm

I just picked up a 71 Fiat 850 that produces 52hp from a 903cc I4.
It looks like the whole operation would fit in a bus engine compartment--radiator and all :lol:

Sun Aug 18, 2013 8:24 pm

So shove one of those other purpose engines in your bus and see how many time you can drive it around the block before it destructs.

There is a reason a monster 12 cyl. Detroit Desiel with dual 6-71 Jimmy superchargers puts out 1,000 HP which in not a lot more than our wildest VW 4-banger drag motors.

Or how about a little model airplane motor that's small enough to fit in a coffee cup but puts out 1/2 HP?

Sun Aug 18, 2013 8:24 pm

So what are you waiting for?, get on it!

http://www.rewaco.ca/welcome.html
http://www.youtube.com/watch?v=UMPj6TGLoGA
http://www.volkszone.com/VZi/showthread.php?p=7287262

Sun Aug 18, 2013 8:36 pm

They call them Hardly-Dangerous for a reason...... :P

-dasdachshund

Mon Aug 19, 2013 8:42 am

Loading an HD engine in a VW is a great way to make an HD engine even less reliable than it already is. All that chrome is just so people can see you when you're broken down at the side of the road ;-)

Mon Aug 19, 2013 8:52 am

Desertbusman wrote: So shove one of those other purpose engines in your bus and see how many time you can drive it around the block before it destructs.

There is a reason a monster 12 cyl. Detroit Desiel with dual 6-71 Jimmy superchargers puts out 1,000 HP which in not a lot more than our wildest VW 4-banger drag motors.

Or how about a little model airplane motor that's small enough to fit in a coffee cup but puts out 1/2 HP?

Worked on an old Continental engine for a while that had around 700cid IIRC, used about 4 gallons of fuel an hour at full throttle which would have put the HP at around 80. The engine was badly abused by neglect and supidity, buy it had never required a rebuild in 40 years of use.

Mon Aug 19, 2013 2:57 pm

ejon wrote: cause it's a japanese designed engine.

Tru-dat.

Mon Aug 19, 2013 3:21 pm

I thought for sure you were going to say... doesn't run, or leaks oil, or makes less HP than a 1979 Honda CX500 (as in 500cc V-twin).

Mon Aug 19, 2013 3:54 pm

borninabus wrote: I just picked up a 71 Fiat 850 that produces 52hp from a 903cc I4.
It looks like the whole operation would fit in a bus engine compartment--radiator and all :lol:

Ebro Siata vans used those engines, no doubt it would fit but I guess lack of torque would still be a problem since Siatas are lighter vehicles than VW baywindows

Mon Aug 19, 2013 4:02 pm

busdaddy wrote:

:shock: