Big cams are better

[nacelp]

> Off road?  I don't need no stinkin' off road!
> I went to an emisions tester here.  He had a '64 Chevy truck and it's 283
> spread over a work bench.  Asked him about what was legal on my '70
> Camaro.  He looked it up and said, "Damn, you could run a blower through
> the hood on that thing."  And I don't have to worry about tail pipe
> sniffs here.  Everything before '75 is exempt. <Big Grin>

Hate to rain on your parade, but the federal law prohits tampering with
emission controls, so while exempt from local testing there are fed rules in
plase to take the fun out of none emission cars used on public highways.
the laws are on the books, just nor being enforced too seriously.

> I thought the 214 limit was trying to run the ECM in a stock
> configuration.  But I sure ain't no expert.  Now that brought back a
> memory.  There was a guy on the list awhile back who worked for or owned
> a company selling plans to use Geo engines in planes.  He advocated using
> an op amp circuit to alter the signal of the MAP.

He passed away some time ago..

> But, the problem is going to be the fluctuation, but Mr Parmer's
> suggestion of using the piping may help dampen the fluctuations.
> >Any idea how "big" a Crane Fireball is?  Advertised 296d/296d with .449
> >lift and Rhoades lifters.
> My Crane  Commander cam is advertised as a dual pattern 280/284 with .510
> lift and 112 overlap.  It's a major rump/rump.
> My wife drove it to a drive-in one time with the kids.  She said every 16
> yo 21 year old male head swiveled to it when she drove up.  She asked,
> "what is it with the car and boys/men?"
> And what does the hac do?

Tells all about what is in the Prom, might go to www.tunercat.com and down
load one and take a peek.
Grumpy

> On Thu, 9 Mar 2000 16:53:30 -0500 "nacelp" <nacelp at bright.net> writes:
> > Hmm,
> > I've run 224 @ .050, and that took some tinkering.
> > By the same token, that was along time ago, before have done the 101
> > drill.
> > If nothing else (since this is for off road), there is always the
> > option of
> > open loop.
> > I think there is a hac floating around for the 747, in which case
> > probably
> > by playing with some of the filtering you might pull it off.
> > I'd been told by some experts that 214 was the absolute limit.
> > Maybe someone has done a big cam 747, and has more info.
> > Is this a big emissions cam (er almost legal type?), or just a
> > single
> > pattern rump rump?
> > Grumpy
> >
> >
> > > Does anyone have either practical or theory backed knowledge of
> > the limit
> > of
> > > how big a cam a 7747 can be reprogrammed for?  I'm running a 245
> > duration
> > at
> > > .050 lift in a Chevy 350.  It will idle at about 10 in of mg at
> > 850 rpm.
> > >
> > > The problem I see is the pressure fluctuation at idle.  I'm using
> > a gauge.
> > > A MAP signal would be all over the place with that camshaft.
> > >
> > > Joe (Bigger IS better) Boucher
> > > '70 RS/SS Camaro  '93 Suburban
> > >
> > >
> > >
> >
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