Re: [T3] Dyno'd my baby today :-)

["Dave Hall" <dave@hallvw.clara.co.uk>]

In an analysis of a '69 Auto FI Fastback, the power curves showed about 16 bhp
lost in transmission, rear wheel and tyre losses while in 3rd gear, with about
12 bhp and 11 bhp in 2nd and 1st.  The power lost was more or less constant for
each particular gear, and independent of the engine RPM while the car was
accelerating and for 3rd gear while running at top speed.  16 bhp is about 30%
of full power.

The 1500 (manual) Notch report for a similar test in 1961 shows a transmission,
rear wheel and tyre loss of just 9 bhp (21% of full power) at full speed of
80mph.

Dave.
UK VW Type 3 & 4 Club
http://www.hallvw.clara.co.uk/
------
----- Original Message ----- 
From: "Louis Brooks" <louisfbrooks@yahoo.com>
To: <type3@vwtype3.org>
Sent: Wednesday, September 29, 2004 1:03 PM
Subject: Re: [T3] Dyno'd my baby today :-)


> You running an auto or a stick shift? With a stick
> shift you can add 15 to 20 HP due to driveline loss.
> No idea how much HP a auto sucks up though. Did you do
> any tuneing or is that straight out of the box? Be
> interesting ot see the specs on your motor.
>
> Louis
> --- Toby Erkson <air_cooled_nut@pobox.com> wrote:
>
> >
> http://www.icbm.org/erkson/personal/squareback_dynojet.jpg
> > 91hp at about 5300rpm.  That's 45.5hp per litre (my
> > engine is 2007cc)
> > :-)  Not as good as I had hoped but better than
> > stock.  Plenty of
> > torque, that's for dang sure!!  Going by our last
> > "power train loss"
> > thread we can figure the engine puts out 107hp-114hp
> > at the crank.
> >

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