healeys
[Top] [All Lists]

Re: [Healeys] BHP - the real figures.

To: HealeyRick <healeyrick@yahoo.com>
Subject: Re: [Healeys] BHP - the real figures.
From: Derek Job <derek.c.job@gmail.com>
Date: Thu, 31 May 2012 17:17:56 +0100
Cc: Forum <Healeys@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=meofZ3L3M9UQH7yvkIy89WnAfwnQndn7mQm3sEi0PUw=; b=GIu8g9iXg7Gi/AW9hQU1faov1MsOi7ZB7vVIK4zCd/YMeltWrJ84Dy2ZVDUq6SS5Jf irRPggMiS85csIdz0UqDaPzLTgMmp9nwFlPmiuGCg0pu++O3YoYhr3RaqxyXblV3cX9f VOYTiG2aJFrAHLcyNlngtexjsdXJon+uH1yxlPz7FA4UEtR+3D5QWAe2tBZ7R26Qi1qE Dfw5lFJDbqFBSoal16PQF9Ikc4ZGHTPNIj1o3M6WjCU4lFJQfXmfr9adR9tPXgnsRO9c Ug+kMLR/ThAyalc2KMdNamL/eFZzQFNuKNy6ovVQY3iOk/y5MimwBBCnC9agYEQh7mzq 8ouQ==
In-reply-to: <1338480606.53491.YahooMailClassic@web161202.mail.bf1.yahoo.com>
List-archive: <http://autox.team.net/pipermail/healeys>
List-help: <mailto:healeys-request@autox.team.net?subject=help>
List-id: Austin Healey Discussion <healeys.autox.team.net>
List-post: <mailto:healeys@autox.team.net>
List-subscribe: <http://autox.team.net/mailman/listinfo/healeys>, <mailto:healeys-request@autox.team.net?subject=subscribe>
List-unsubscribe: <http://autox.team.net/mailman/options/healeys>, <mailto:healeys-request@autox.team.net?subject=unsubscribe>
References: <CAAh8et=fzsf0BKfzYzeTMXTH1V89q6x6=ixsZ6CYgJ7_wufpkA@mail.gmail.com> <1338480606.53491.YahooMailClassic@web161202.mail.bf1.yahoo.com>
Sender: healeys-bounces@autox.team.net
Rick,

Yes that's true so it's not a fair comparison. Plus of course the only hp
that really matters I suppose, is that which finds its way to the wheels.
And there goes another 20 to 30%!

So I guess, at the wheels a stock BJ8 has about 95-100 hp.




On Thu, May 31, 2012 at 5:10 PM, HealeyRick <healeyrick@yahoo.com> wrote:

> Derek,
>
> I'm sure the factory ratings were "optimistic", however they were also
> rated differently than your rolling road test.  Factory numbers were
> obtained without any engine accessories on an engine dyno. The same engine
> on a rolling road would be somewhere in the neighborhood of 15-20% less
> powerful due to the parasitic losses of the driveline, engine accessories
> and silencers.
>
> Rick
>
> Follow My Nasty Boy Build: http://tinyurl.com/yj52fwo
>
> --- On *Thu, 5/31/12, Derek Job <derek.c.job@gmail.com>* wrote:
>
>
> From: Derek Job <derek.c.job@gmail.com>
>
> Subject: [Healeys] BHP - the real figures.
> To: "Forum" <Healeys@autox.team.net>
> Date: Thursday, May 31, 2012, 11:37 AM
>
> In preparation for my first competitive outing  I took the car to a
> specialist with a rolling road to give it the once over generally and set
> everything for optimum performance. He is a  well known guy in motor sport
> circles having prepared various Pro-rally teams cars as well as a lot of
> exotic classics including Miuras and Ferrari 250s. One of the reasons he
> got the rally prep jobs was because they were impressed that had the most
> accurately calibrated dyno, which translates to one that produces real, but
> lower figures than most of the others.
>
> My car has a BJ8 engine, twin HD8s, DWR8 'fast road cam, polished and
> ported iron head, six branch manifold, itg fast flow filter. Compression
> came in at 195 pretty much across the board and he thought the comp ratio
> would be around 10.5 : 1. Maximum ignition advance was 31 degrees initially
> but when we optimised the performance i think it was advanced a tiny bit
> further. I will check it's exact current setting when I get chance
>
> The result.
>
> Maximum power is 160 bhp at 5500 revs.
>
> Max torque is 158 ft/lbs at 3100 revs and stays flat until 4700.
>
> Torque is 140ft lbs at 1700 so there is a very broad and useable power
> band.
>
> I think we can safely say a stock BJ8 never produced 150 bhp!
>
> He told me that  whenever he tests classic cars there is always a very
> large difference between reality and the bhp figures stated at the time.
>
> Derek
> www.healeysix.net
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
>
> Healeys@autox.team.net <http://mc/compose?to=Healeys@autox.team.net>
> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/healeyrick@yahoo.com
_______________________________________________
Support Team.Net http://www.team.net/donate.html
Suggested annual donation  $12.75
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums

Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys

Unsubscribe/Manage: 
http://autox.team.net/mailman/options/healeys/mharc@autox.team.net

<Prev in Thread] Current Thread [Next in Thread>