Rotaries: was Buick V6

[dom]

OK we're going way off topic here but I'm going to throw a few points out:

A turbo 12A should not weight 360#, however as they were never brought
stateside I can't confirm that.

A 13B Block is ~200#, with intake and oil pan

The older 87-89 turbo blocks would blow out the area near the rear dowel
@400-425hp, like clockwork.

There are dozens of 450+ RWHP RX-7s on the streets, several 500 and a few
pushing 600, not bad for 1.3l :-)

As with any engine after a point, increases in HP, decrease engine life.

Turbo Buicks are crazy fast

-Dom

> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of Bruce
> Sent: Saturday, October 30, 1999 1:52 PM
> To: diy_efi at diy-efi.org
> Subject: Re: Rotaries: was Buick V6
>
>
>
> Not going to get in a flamefest here but as HP rises the amount of
> deflection, *warpage* always increases.  Fact of life.
> Take some iron monster like a 426 Hemi and put dial indicator on opposite
> corners of the engine and go to max HP, you can read as much as 3/4"
> warpage/distorsion, whatever.  If in doubt call Dick Landy, I'm sure he
> remembers the testing.
>
> As an engines HP increases, it generates more BTUs.   As you mentioned the
> different materials expand at different rates, so yes they do
> distort more,
> and a rotary isn't at all forgiving on being overheated stock or in LeMans
> trim.
> Bruce
>
> From: "David Randall" <davidra at windows.microsoft.com>
> Subject: Rotaries: was Buick V6
> > Hmm, above 300 HP, a 13B two rotor rotary engine won't "warp".  The term
> > "housing" can be applied to the side housings / end plates, or the rotor
> > housings (fat figure 8 part).
> > Warpage usually occurs when the engine is overheated.  The materials
> > used in the side housings are different than those used in the rotor
> > housing.  As temperatures rise, the expansion of these different
> > materials occurs at a different rate.  That differential usually causes
> > some type of warpage, or will allow enough of a gap inbetween the two
> > housings to let the coolant seal become compromised (exposed to
> > combustion).
> > High HP won't necessarily overheat the engine, but a poorly designed
> > system will cause overheating.
> > Another possible "warpage" story would be the warpage of a 3 or 4 rotor
> > eccentric shaft (think crankshaft).  In that case, high horsepower would
> > cause too much stress on a poorly designed shaft.  Some early 3 or 4
> > rotor shafts were built up from 2 rotor shafts and welded together.
> > Given the fact that a 3 rotor engine with full engine management and
> > turbos can produce up to 800-900 HP, you could see why a welded together
> > eccentric shaft could become warped.
> > But, run of the mill 13B and 12A rotaries don't usually warp from HP,
> > they warp from overheating.
> > HTH
> > Dave Randall
>
> > From: Jim Blackwood [mailto:jblackwood5 at home.com]
> > Sent: Monday, October 29, 2001 11:30 AM
> > To: diy_efi at diy-efi.org
> > Subject: RE: was injector staging: now Buick V6
> > I heard the housings begin to warp around 300 and higher. Anything to
> > that?
>
> > From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> > Behalf Of Bruce
> > Sent: Saturday, October 30, 1999 11:16 AM
> > To: diy_efi at diy-efi.org
> > Subject: Re: was injector staging: now Buick V6
> > Look up a 4 rotor, and be sure to sit down first.
> > I can run at about 500 in my street trim GN.  Lots of guys doing about
> > the same thing, with less work then I have in mine.  $2K takes care of
> > injectors, a Turbo, better electronics, and money left for tires, etc.,
> > on a GN. Bruce
>
> > From: <bill.shurvinton at nokia.com>
> > Subject: RE: was injector staging: now Buick V6
> > > 12A turbo 360Ibs!!! wierd. AFAIK the 12As were around the 200 mark, at
> > > least in NA form. I will do some research at home tonight. I can
> > > believe that the 20B is over 300, but that is a different beast. As
> > > for life, splash out on ceramic seals and the engine lasts for ages. I
> > > have heared of 3 seasons racing on a 500BHP motor with no rebuilds.
> > > Mind you at $2k for a set of seals, they ought to be good. Bill
> > > From: ext Bruce [mailto:nacelp at bright.net]
> > > Subject: Re: was injector staging: now Buick V6
> > > Rotary 12A with turbo, 360 lbs.
> > > B
>
>
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