[tcb] Re: Engine building next chapter
- From: singlecabboy <sealingwaxred@xxxxxxxxxxxxx>
- To: tcb@xxxxxxxxxxxxx
- Date: Sat, 15 Sep 2007 14:28:33 -0700 (PDT)
Alot of the guys in NASCAR ACCTULLY ENJOY DUNE BUGGY'S
AND
--- Denis Dodson <coocoo@xxxxxxx> wrote:
> It's your mouth you need to wash. Said NASCAR.
> Everybody knows you said
> NASCAR.
>
> It could be interesting to have a pro NASCAR guy
> build a VW engine. "Don't
> wear shorts. It'll burn the hair off yer legs."
>
>
> ----- Original Message -----
> From: "Will Wood" <evilscientistboo@xxxxxxxxxxxxx>
> To: <tcb@xxxxxxxxxxxxx>
> Sent: Thursday, September 13, 2007 1:59 PM
> Subject: [tcb] Re: Engine building next chapter
>
>
> > Must Wash..., hands not clean...
> >
> >
> >
> >
> >
> > -----Original Message-----
> >>From: singlecabboy <sealingwaxred@xxxxxxxxxxxxx>
> >>Sent: Sep 13, 2007 12:44 PM
> >>To: tcb@xxxxxxxxxxxxx
> >>Subject: [tcb] Re: Engine building next chapter
> >>
> >>MOMMA , Will said NASCAR.....
> >>--- Will Wood <evilscientistboo@xxxxxxxxxxxxx>
> wrote:
> >>
> >>> Approx 5.4" is the stock length. Engine
> Builders
> >>> like to use the term rod ratio. The higher the
> rod
> >>> angle, the more stress
> >>> that is put on the rod via side load hence all
> of
> >>> the I Beam and H Beam rods on the market. The
> >>> advantage however is that you get more low end
> and
> >>> midrange out of the engine because you're
> >>> accelerating the crankshaft and pistons faster.
> If
> >>> you have a higher RPM engine or clearance issues
> >>> then you're forced to longer rods. In my 2387
> using
> >>> Mahle B pistons I have 5.5" rods on an Okrasa
> 86mm
> >>> crank. The rod to skirt distance is about .80"
> at
> >>> maximum angle. Another drawback to higher rod
> angle
> >>> is more piston slap but you'll get that with B
> or
> >>> stroker pistons anyway.
> >>>
> >>> Another way to put it is a term called rod
> ratio.
> >>> That's the length of the rod divided by the
> stroke
> >>> of the crank.
> >>> Most engine builders like the ratio to be
> between
> >>> 1.5 and 2.0. Again, preferences, experiences
> may
> >>> vary on that number
> >>> but for a given rod length the lower the ratio
> the
> >>> higher the rod angle. NASCAR engines are
> somewhere
> >>> over 2+ because they
> >>> live at high RPM all day long. I had to put
> that in
> >>> there for all the NASCAR fans out here.
> >>>
> >>> A stock set of rods and a stock crank has a
> ratio of
> >>> 1.98 (5.394 / (69mm / 25.4mm/in)). 5.394 is the
> >>> actual
> >>> VW Stock Rod length but what's .006 between
> friends
> >>> right?
> >>>
> >>> So, assuming Denis goes with his stock 78mm
> crank
> >>> and stock rods that gives us a ratio of (5.394 /
> >>> (78mm / 25.4mm/in)) = 1.75
> >>>
> >>> Like I said, stock rods will work on a stroker
> but
> >>> if you want to play with it invest in some
> better
> >>> rods.
> >>>
> >>>
> >>>
> >>> -----Original Message-----
> >>> >From: Dan <ThatVWGuy@xxxxxxxxxxx>
> >>> >Sent: Sep 13, 2007 6:55 AM
> >>> >To: tcb@xxxxxxxxxxxxx
> >>> >Subject: [tcb] Re: Engine building next chapter
> >>> >
> >>> >Longer than stock.
> >>> >
> >>> >Someone will correct me but I think stock is
> 4.8".
> >>> I'm using 5.0" rods on
> >>> >my 2017...something like that anyway. The
> point is
> >>> if you increase the
> >>> >stroke of the crank the rod angle changes.
> Picture
> >>> a cutaway view of an
> >>> >engine with the rod on a stock crank with the
> crank
> >>> at it's highest in it's
> >>> >revolution. The rod will be pointing down
> toward
> >>> the cylinder at an angle.
> >>> >Now picture it with a stroker crank, the angle
> >>> increases because the
> >>> >connecting point on the crank just got higher
> but
> >>> the connecting point on
> >>> >the piston stayed the same. By using longer
> rods
> >>> the connecting point on
> >>> >the piston moves out reducing the rod angle.
> >>> >
> >>> >
> >>> >
> >>> >----- Original Message -----
> >>> >From: "Denis Dodson" <coocoo@xxxxxxx>
> >>> >To: <tcb@xxxxxxxxxxxxx>
> >>> >Sent: Wednesday, September 12, 2007 10:21 PM
> >>> >Subject: [tcb] Re: Engine building next chapter
> >>> >
> >>> >
> >>> >> This is a multi-part message in MIME format.
> >>> >> Mime-Version: 1.0
> >>> >> Content-Type: multipart/mixed;
> >>> >> boundary="=======AVGMAIL-46E922D203C9======="
> >>> >>
> >>> >> --=======AVGMAIL-46E922D203C9=======
> >>> >> Content-Type: multipart/alternative;
> >>> >>
> >>>
> boundary="----=_NextPart_000_00F8_01C7F582.F0CE6440"
> >>> >>
> >>> >> ------=_NextPart_000_00F8_01C7F582.F0CE6440
> >>> >> Content-Type: text/plain; charset=iso-8859-1
> >>> >> Content-Transfer-Encoding: quoted-printable
> >>> >>
> >>> >> Longer stock rods?
> >>> >> ----- Original Message -----=20
> >>> >> From: Dan=20
> >>> >> To: tcb@xxxxxxxxxxxxx=20
> >>> >> Sent: Wednesday, September 12, 2007 8:40 PM
> >>> >> Subject: [tcb] Re: Engine building next
> chapter
> >>> >>
> >>> >>
> >>> >> 2017cc if 78.4 crank and 2007cc with 78.0
> crank.
> >>> Lots more torque =
> >>> >> than what you had before. Because of the rod
> >>> angle you should consider =
> >>> >> using longer than stock rods.
> >>> >>
> >>> >> -Dan =20
> >>> >> (...who is also building a 2017cc)
> >>> >>
> >>> >> ----- Original Message -----=20
> >>> >> From: Denis Dodson=20
> >>> >> To: tcb@xxxxxxxxxxxxx=20
> >>> >> Sent: Wednesday, September 12, 2007 10:36
> AM
> >>> >> Subject: [tcb] Engine building next
> chapter
> >>> >>
> >>> >>
> >>> >> That is a good idea, Shirley, about the
> engine
> >>> in Ruby, the Ghia. It =
> >>> >> is almost brand new. And if you will send me
> the
> >>> Porsche engine, Dunc, =
> >>> >> I'll pop that booger in as soon as I get it.
> >>> >>
> >>> >> I do think that it will go this way:
> Tomorrow,
> >>> probably, I will pull =
> >>> >> the engine and take it up to Wayout where he
> says
> >>> that he has all the =
> >>> >> tools to do machining and build. We will, at
> >>> least, tear it down and as =
> >>> >> Will suggested, see what we have.
> >>> >>
>
=== message truncated ===
Paul Smith
www.23window.com/thezone
T.C.B.
H.B.B.
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