Way to measure HP?

[Bruce Plecan]

I just like doing things the simple way.
Ignore 3-10 tire revolutions, and start a timer, count say 100 revolutions
and stop the timer.
Neat and consistant.
Only if your to where you have alot of tire slippage will that not work just
dandy.

More I think of it, the MAF is just fine thou.
Just run as **large** of one as you can, and then a freq counter, if using
like a 3.5" late GM one.
the reason for large is to have as much resolution as possible at the top
end.

Peak airflow, the more and more I think about it would be as good of
indicator as anything.  AFR doesn't matter.

The problem with the MAF though is reversion.
A WOT there really shouldn't be any / much thou.
Bruce
          Wasn't a nerve, just get tired of the numbers game.



From: "Daniel Houlton" <houlster at inficad.com>
> Bruce Plecan wrote:
> > .75 grams/sec.= 1 SAE HP when tuned *Precisely*
> >  calulated HP has never run a race.
> > Again, all about the state of tune.
> > If you were using a WB and knew that you were in the nieghbor hood of
> > 12ish:1 then would be a fair guess, but why bother?.
> > Like I said calculated HP is an Ego issue.
> > Good for bench racing, and saying my dog is bigger then your dog.
that's
> > about all.
> > Bruce

> Uhh, thanks for the info.  I think.  Did I strike a nerve
> there with this question?  I'm not planning on winning races,
> nor do I wan't to go around saying how big my dog is.  I just
> want to know the results of changes I've made emperically (sp?)
> rather than seat-o-the-pants kinda stuff.  Dyno time is far
> too expensive.
> I've used Home Dyno in the past and it is (or was for me
> anyway) very accurate.  Within 1 or 2% of the baseline chassis
> dyno run I did to check it.
> However, getting a reading with it isn't all that painless.
> I always had to clean up the first few seconds of the run by
> taking out the noise between the ignition pulses to get a
> reading.
> I also added an MSD boost retarding ignition and that pretty
> much ended the use of Home Dyno.  The 3 pulses at low rpm
> just realy screwed it up and I'd have to edit for an hour to
> take the extra pulses out to get a reading.
> Sounds like I'd be better off sticking with it though and
> try getting better filtering instead.  I do want numbers as
> accurate as I can get.  It sounds like MAF readings won't be
> depending on state of tune, eh?
> thanks
> --Dan

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