Comments on: Harley Davidson V4 Nova

By: james

james — Fri, 21 Aug 2009 05:00:05 +0000

to OTTOMAN in a two cylinder engine design the advantages of a water cooled system are very much a moot point, on one hand the function of running liquid to move the heat to a radiator allows for cooling in tight spaces that a finned heat sink would not be able to reach, however it can very easily create hot spots that deform and “burn” the metal that t was intended to cool, this is because when the liquid can and will often boil near the hot spots, destroying the metal by an two pronged attack by allowing the metal to melt and by oxidizing it, where as the air cooled single or twin will over heat if left at idle for extended periods of time, (w/out the use of a fan) the argument that one cooling style or another will allow for tighter tolerances is an argument straight out of the 70’s and early 80’s as modern metallurgy has allowed for engineers to design the metals rate of expansion. in an engine with more than two cylinders the liquid can reach areas that air cannot or that would require an extraordinary amount of space for cooling fins. in the end there is no advantage or disadvantage save those that are application specific (such as space requirements or cars) furthermore with the recent advances in both metallurgy and synthetic oils, we may soon be seeing engines that are designed to run at much higher temperatures again seeing a general preface for air cooled engines in the high performance market.

By: Gerard

Gerard — Sat, 04 Apr 2009 18:45:58 +0000

Gentemen: Speaking about the angles of 45, 60 or 70 degrees: It is a golden rule that ALL parts of an engine, flywheels, pistons, cranks etc. which are stamping up and down, or swaying, or turning, give loss of power. It sounds a bit weird, but if they did not have weight at all, you`ll see an increase of power with 200 % or more. Theoretically of course. It`s not for nothing the jet engine is the strongest engine compared to its size, it has only one turning part. Greets, Gerard.

By: G. Wayne

G. Wayne — Sun, 20 Jul 2008 12:12:13 +0000

When the Nova was in R&D the market was totaly different than today. The name SPORTBIKE had not yet been invented. Cafe Racers were the thing. Harley had 90cc to 350 cc bikes that won a lot of races. The 1977-78 XLCR was awsome for it’s day, but they did not sell well. This was also a time when you could buy any Japnese motorcycle import upto 5 years old new for highly discounted prices. These were in wharehouses all over the US in the late 70’s and early 80’s. Harley built what sells and developed on that route. Bad as they might be in some people’s opinion what other motorcycle model has been built for over 50 years and still sells everyone made every year like the Sportster does.

By: E. Rick Dunbar

E. Rick Dunbar — Fri, 08 Feb 2008 22:01:55 +0000

well folks
how would you like the real deal
in fact was looking for V2+2 Engineering in Portland Or. old address is 2106 N.E. Junior St.
if you have access to Iron Horse mag. has #133 printed in april 1995 issn 0195-1165 volume 18,no.4, issue 133
i have the story from the horse’s mouth
it’s only two pages + 5 pic’s
if iron horse can’t send it to you i’ll try
rick dunbar “the coyote”
149 leger dr
opelousas la 70570
p.s. the basic real story about what hd wanted to do

By: OTTOMAN

OTTOMAN — Sat, 21 Jul 2007 03:00:27 +0000

MY QUESTION IS WHAT ADVANTAGE WOULD A WATER COOLED {IF [POSSIBLE} EVO MOTOR HAVE