[tcb] Re: Engine building next chapter
- From: Will <evilscientistboo@xxxxxxxxxxxxx>
- To: <tcb@xxxxxxxxxxxxx>
- Date: Sat, 15 Sep 2007 17:58:49 -0500
LOL I could use Nair.
-----Original Message-----
From: Denis Dodson <coocoo@xxxxxxx>
Sent: Thursday, September 13, 2007 8:34 PM
To: tcb@xxxxxxxxxxxxx
Subject: [tcb] Re: Engine building next chapter
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"
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>>> >> 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.
>>> >>
>>> >> Then I will either build the new engine there,
>>> probably using the =
>>> >> 90.5 pistons and cylinders, or take the parts and
>>> bus down to Chuck's =
>>> >> and build it there the week before T@P.
>>> >>
>>> >> I have to tell you guys that it fees really
>>> cool to have four =
>>> >> engines offerred as loaners, not even counting
>>> the Ghia. Thanks y'all.
>>> >>
>>> >> So, if I use the 90.5s and I have a 78.4
>>> stroke, what will the new =
>>> >> engine size be, and what is the formula, anyway?
>>> Multiply, add? I have a =
>>> >> 1914, how do you get that number
>>> >>
>>> >>
>>> >>
>>>
>>-------------------------------------------------------------------------=
>>> >> ---
>>> >>
>>> >>
>>> >> No virus found in this incoming message.
>>> >> Checked by AVG Free Edition.=20
>>> >> Version: 7.5.485 / Virus Database:
>>> 269.13.15/1002 - Release Date: =
>>> >> 9/11/2007 5:46 PM
>>> >>
>>> >>
>>> >>
>>> >>
>>>
>>-------------------------------------------------------------------------=
>>> >> -----
>>> >>
>>> >>
>>> >> No virus found in this incoming message.
>>> >> Checked by AVG Free Edition.=20
>>> >> Version: 7.5.485 / Virus Database:
>>> 269.13.15/1003 - Release Date: =
>>> >> 9/12/2007 10:56 AM
>>> >>
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>>> >> Content-Type: text/html; charset=iso-8859-1
>>> >> Content-Transfer-Encoding: quoted-printable
>>> >>
>>> >> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0
>>> Transitional//EN">
>>> >> <HTML><HEAD>
>>> >> <META http-equiv=3DContent-Type
>>> content=3D"text/html; =
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>>> >> <META content=3D"MSHTML 6.00.2900.3157"
>>> name=3DGENERATOR>
>>> >> <STYLE></STYLE>
>>> >> </HEAD>
>>> >> <BODY bgColor=3D#ffffff>
>>> >> <DIV><FONT face=3DArial size=3D2>Longer stock
>>> rods?</FONT></DIV>
>>> >> <BLOCKQUOTE=20
>>> >> style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px;
>>> MARGIN-LEFT: 5px; =
>>> >> BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT:
>>> 0px">
>>> >> <DIV style=3D"FONT: 10pt arial">----- Original
>>> Message ----- </DIV>
>>> >> <DIV=20
>>> >> style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial;
>>> font-color: =
>>> >> black"><B>From:</B>=20
>>>
>>=== message truncated ===
>>
>>
>>Paul Smith
>>www.23window.com/thezone
>>
>>T.C.B.
>>H.B.B.
>>
>
>
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>
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> Checked by AVG Free Edition.
> Version: 7.5.487 / Virus Database: 269.13.16/1005 - Release Date:
> 9/13/2007 11:45 AM
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