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. >> >> 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 >> >> ------=_NextPart_000_00F8_01C7F582.F0CE6440 >> 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; = >> charset=3Diso-8859-1"> >> <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.-- No virus found in this incoming message. Checked by AVG Free Edition.Version: 7.5.487 / Virus Database: 269.13.16/1005 - Release Date: 9/13/2007 11:45 AM
