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[Fwd: Re: Cross-Flow Heads]

To: mgs@Autox.Team.Net
Subject: [Fwd: Re: Cross-Flow Heads]
From: "Christopher M. Delling" <cdelling@ic.net>
Date: Tue, 08 Jul 1997 16:17:38 -0400
Message-ID: <33C29FDC.42B6@ic.net>
Date: Tue, 08 Jul 1997 16:15:24 -0400
From: "Christopher M. Delling" <cdelling@ic.net>
Reply-To: cdelling@ic.net
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To: Skip Kelsey <kelsey@value.net>
Subject: Re: Cross-Flow Heads
References: 
<c=US%a=_%p=TDS-GN%l=MAN-1111-970708172214Z-7847@hub02.tds-gn.lmco.com> 
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Skip Kelsey wrote:
> 
> Chris:
> 
> A lot of people are in the dark as to the actual horsepower that a B engine
> puts out. THe Factory advertises 95 HP. This is not true. It actually puts
> out about 79 HP. There is a difference between BHP & SAE HP. Now adays it
> is figured differently. I dont claim to be an engineer, but If you research
> this you will see what I mean. Mike Pierce can explain it better than I can.
> 
Skip-

I am very much aware of these differences, having worked in the
dynomometer industry for more than 10 years.  I agree, a lot of people
don't understand the H.P. ratings, and SAE net (measured at the rear
wheel on a rolling road) is a lot different that the old BHP Gross
values (measured at the flywheel with an engine dyno).

However, my conclusions are based on charts from Steve Darby's website. 
In these charts, he shows dyno numbers, at the rear wheels, for a
engine/carburation package, followed by the same engine with the
crossflow head.  It is these numbers which show the relatively small
improvement.  

It also seems that moving the intake to the offside of the engine would
make access to the distributor much more difficult, although this seems
to be a minor problem.  I am not trying to discredit the crossflow
head.  I just question it's benefit on a near stock street motor.  I am
sure that for a racing B it gives a definite advantage.

Regards,

Chris Delling


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