[DeTomaso] Compression ratio estimate

Tue Aug 13 15:02:53 EDT 2013

Gas expansion VS explosion is really based on your definition of time.
Your definition of time is derived from what you are trying to explain.

> No no no....
> It goes through rapid disassembly due to super accelerated fuel burn and
> resultant gas expansion.
>
> Sometimes I really hate PC.
> The damn thing BLOWS UP!
>
> Asa
>
> Sent using Jedi mind tricks.
>
> -----Original message-----
> From: "michael at michaelshortt.com" <michaelsavga at gmail.com>
> To: Ken Green <kenn_green at yahoo.com>
> Cc: detomaso at poca.com, Jack Donahue <demongusta at me.com>
> Sent: Tue, Aug 13, 2013 18:16:24 GMT+00:00
> Subject: Re: [DeTomaso] Compression ratio estimate
>
> Perhaps
> ...ever seen a top fuel motor with 1% too much nitro.
> It freaking explodes.
>
> Michael
> On Aug 13, 2013 2:13 PM, "Ken Green" <kenn_green at yahoo.com> wrote:
>
>> I know that the powder used in reloading ammo is not classified as an
>> explosive, and I assume there is some technical definition based on burn
>> rate.  When selecting a powder you may want a fast powder for a target
>> load, or a slower powder to maximize energy.  The difference may be in
>> micro (or nano) seconds, but there is a very real difference in
>> theoutcome.
>>
>> Ken
>>
>>   *From:* Boyd Casey <boyd411 at gmail.com>
>> *To:* Melanie Disco <michael at michaelshortt.com>
>> *Cc:* Jack Donahue <demongusta at me.com>; "detomaso at poca.com" <
>> detomaso at poca.com>
>> *Sent:* Tuesday, August 13, 2013 9:40 AM
>> *Subject:* Re: [DeTomaso] Compression ratio estimate
>>
>> No need to explode about it! LOL
>>
>>
>> On Tue, Aug 13, 2013 at 8:40 AM, michael at michaelshortt.com <
>> michaelsavga at gmail.com> wrote:
>>
>> > I don't think that this is worth a semantics discussion Larry, you
>> know
>> > what I meant.
>> >
>> > The official definition ( of 12 offered, this #1) is.
>> > ex·plode  (k-spld)v. ex·plod·ed, ex·plod·ing, ex·plodesv.intr.
>> >
>> > 1. To release mechanical, chemical, or nuclear energy by the sudden
>> > production of gases in a confined space:
>> >
>> > Whether ignited by a spark or by pressure (as in a diesel), the fuel
>> indeed
>> > explodes and that explosion is what drives the piston down.
>> IMHO,"burn"
>> > does not fully convey the mechanical reaction which occurs. Merely
>> burning
>> > fuel doesn't have the same word power or descriptive power of the
>> > intensity, especially when put in the content of a Formula One engine
>> which
>> > at 18,000 revolutions per minute caused by 144,000 little explosions.
>> > Perhaps in an Isetta, but in an 8,000 hp funny car, my Pantera and
>> even
>> my
>> > weed wacker, I can hear these very rapid "explosions" which are caused
>> by
>> > fuel being burned in a sudden manner in a confined space = definition.
>> >
>> > Michael
>> > On Aug 13, 2013 8:21 AM, "Larry - Ohio Time Corp" <
>> larry at ohiotimecorp.com>
>> > wrote:
>> >
>> > > <<lower octane fuel will explode more easily.>>
>> > >
>> > >
>> > > I am not happy with the word Explode. There are no explosions in a
>> motor.
>> > > It
>> > > is a very rapid burn. The same thing is true when you shoot a gun.
>> There
>> > is
>> > > no explosion, but a very rapid burn.
>> > >
>> > >
>> > > Larry (details) - Cleveland
>> > >
>> > >
>> > >
>> > >
>> > > -----Original Message-----
>> > > From: detomaso-bounces at poca.com [mailto:detomaso-bounces at poca.com]
>> On
>> > > Behalf
>> > > Of michael at michaelshortt.com
>> > > Sent: Monday, August 12, 2013 11:19 PM
>> > > To: Jack Donahue
>> > > Cc: detomaso at poca.com
>> > > Subject: Re: [DeTomaso] Compression ratio estimate
>> > >
>> > > The more squishy it gets, the higher the compression.
>> > >
>> > > This is the volume is 64 at the bottom and 8 at the top, the comp
>> ratio
>> > is
>> > > 8:1
>> > >
>> > > But if the bottom volume is 120 and the top volume is 10, the comp
>> ration
>> > > is
>> > > 12:1
>> > >
>> > > The reason that higher comp engines need prem fuel is that it is
>> less
>> > > volatile, meaning that it takes more to set it off, where, lower
>> octane
>> > > fuel
>> > > will explode more easily.
>> > >
>> > > Dieseling is a byproduct of fuel being set off by pressure rather
>> than
>> by
>> > > spark, so you want fuel that reacts more to spark and less to
>> pressure, a
>> > > diesel engine doesn't even use a spark, all the fuel is exploded by
>> > > pressure
>> > > after the first reaction that is helped alone by the glow plug to
>> get
>> it
>> > > started.
>> > >
>> > >
>> > > Michael
>> > >
>> > >
>> > >
>> > > On Mon, Aug 12, 2013 at 11:10 PM, michael at michaelshortt.com
>> > > <michaelsavga at gmail.com> wrote:
>> > > > It is the difference in volume of the cylinder space at the bottom
>> of
>> > > > the stroke and between the volume at the top of the stroke.
>> > > >
>> > > >
>> > > > Michael Shortt
>> > > >
>> > > > On Mon, Aug 12, 2013 at 11:02 PM, Jack Donahue <demongusta at me.com>
>> > > wrote:
>> > > >> Could someone DEFINE "compression ratio"?
>> > > >> On Aug 12, 2013, at 6:33 AM, Jeff Detrich wrote:
>> > > >>
>> > > >>>
>> http://store.katechengines.com/whistler-compression-ratio-tester-p17
>> > > >>> 4.aspx
>> > > >>>
>> > > >>> Maybe find a shop with one of these?
>> > > >>>
>> > > >>> Jeff
>> > > >>> 6559
>> > > >>>
>> > > >>>
>> > > >>> On Sun, Aug 11, 2013 at 10:02 PM, Boyd Casey <boyd411 at gmail.com>
>> > > wrote:
>> > > >>>
>> > > >>>> Dear fellow Panteraians,
>> > > >>>> I have a question for the more technically savvy . Is it
>> possible
>> > > >>>> to come up with an estimate of your pistons compression ratio
>> by
>> > > >>>> measuring the cylinder compression? As I have mentioned before
>> I
>> > > >>>> bought my car from the estate of a gear head who owned several
>> auto
>> > > >>>> parts stores and he spent allot of money on my Pantera when it
>> was
>> > > >>>> his. He was apparently a fan of Hall Pantera because allot of
>> the
>> > > >>>> Pantera goodies he bought appear to be Halls ( and there were
>> lots
>> > > >>>> of Hall literature and parts lists) The engine has roller
>> rockers
>> > > >>>> and Hall big bore headers and an in unidentified cam. Since I
>> have
>> > > >>>> not been inside the engine ( and don't want to until I need
>> too) I
>> > > >>>> am trying to find out as much as I can and if there are any
>> > > >>>> forensic techniques for coming up with an educated guess as to
>> the
>> > > >>>> engine components I would appreciate hearing about them.
>> > > >>>> Boyd
>> > > >>>> _______________________________________________
>> > > >>>>
>> > > >>>> Detomaso Forum Managed by POCA
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>> > > >
>> > > >
>> > > > --
>> > > >
>> > > >
>> > > >
>> > > >
>> > > >
>> > > >
>> > > >
>> > > > Michael L. Shortt
>> > > > Savannah, Georgia
>> > > > www.michaelshortt.com
>> > > > michael at michaelshortt.com
>> > > > 912-232-9390
>> > > >
>> > > >
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>> > > > you
>> > >
>> > >
>> > >
>> > > --
>> > >
>> > >
>> > >
>> > >
>> > >
>> > >
>> > >
>> > > Michael L. Shortt
>> > > Savannah, Georgia
>> > > www.michaelshortt.com
>> > > michael at michaelshortt.com
>> > > 912-232-9390
>> > >
>> > >
>> > > This email is protected by the Electronic Communications Privacy
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>> 18
>> > > U.S.C. Sec. 2510-2521, is confidential and may be legally
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