<html><div>What motor oil are you using? Lack of zinc may be a cause of the lifter pitting. Joe(B)<br><br>---------- Original Message ----------<br>From: Christian Marx via Fot <fot@autox.team.net><br>To: "fot@autox. team. net" <fot@autox.team.net><br>Subject: [Fot] Do(o)med or flat lifters?<br>Date: Mon, 23 Jul 2018 12:08:28 +0300<br><br></p><div dir="auto">In the past we had this discussion.<div dir="auto">I've bought some high quality lifters from USA, made from tool steel I suppose. 400$ they've cost..... and started to fail. On 3 of them, the very center does show e few pittings. Also visible that only a small part of the Cam is used.. The cam is okay</div><div dir="auto"> </div><div dir="auto"> </div><div dir="auto">The machine shop will grind the lifters dead flat, as they should be, they say.</div><div dir="auto"> </div><div dir="auto">Cheers</div><div dir="auto">Chris</div></div><div class="gmail_extra"><br><div class="gmail_quote">Am 18.07.2018 02:12 schrieb "fubog1 via Fot" <<a href="mailto:fot@autox.team.net">fot@autox.team.net</a>>:<br><blockquote class="quote" style="margin: 0 0 0 .8ex; border-left: 1px #ccc solid; padding-left: 1ex;"><div><span style="font-size: small;">Yes, lacking access to a Cam Doc, you can use a set of V or bearing blocks, a degree wheel, dial indicator, and a bit of time, checked at 5 cam degrees, works fine.</span></div><div><span style="font-size: small;">I'm still old school though, I plot them out on graph paper!<br> </span></div><div><span style="font-size: small;">That will give you the lobe profile but most folks don't have the full specs on the cam, usually just advertised lift and duration.</span></div><div><span style="font-size: small;">Since the tip of the lobe usually starts to go away first, a simple lift measurement will reveal the worst, best done with a dial indicator cuz some (cheap) cams are ground on different base circles.</span></div><div><span style="font-size: small;">Generally, ramp wear is unusual if the tip is still OK, although there can be exceptions.</span></div><div><span style="font-size: small;"><br> </span></div><div><span style="font-size: small;">Glen.</span></div><div><span style="font-size: small;"><br> </span></div><div> </div><div> </div><div> </div><div style="font-family: arial,helvetica; font-size: 10pt; color: black;">-----Original Message-----<br> From: timmmurphh <<a href="mailto:timmmurphh@gmail.com" rel="noreferrer" target="_blank">timmmurphh@gmail.com</a>><br> To: 'fubog1' <<a href="mailto:fubog1@aol.com" rel="noreferrer" target="_blank">fubog1@aol.com</a>>; rbtr3a <<a href="mailto:rbtr3a@cox.net" rel="noreferrer" target="_blank">rbtr3a@cox.net</a>><br> Sent: Tue, Jul 17, 2018 12:38 pm<br> Subject: RE: [Fot] Cams<br> <br><div id="m_151265155674621544AOLMsgPart_1.2_29f0e059-9a54-4bb0-97f3-60a994db6d64"><div class="m_151265155674621544aolReplacedBody" lang="EN-US"><div class="m_151265155674621544aolmail_WordSection1"><div class="m_151265155674621544aolmail_MsoNormal">By degreeing the cam using increments of 10 crankshaft degrees (5 camshaft degrees) and then plotting the results in Excel, it is possible to get a very accurate picture of the profile of the cam.</div><div class="m_151265155674621544aolmail_MsoNormal"> </div><div class="m_151265155674621544aolmail_MsoNormal">I’ve attached a spreadsheet showing an intake and exhaust lobe comparison two years apart of our Kastner G3 cam for reference.</div><div class="m_151265155674621544aolmail_MsoNormal"> </div><div class="m_151265155674621544aolmail_MsoNormal">Tim Murphy</div><div class="m_151265155674621544aolmail_MsoNormal">#317 TR4</div><div class="m_151265155674621544aolmail_MsoNormal"> </div><div class="m_151265155674621544aolmail_MsoNormal"><strong>From:</strong> Fot <fot-<a rel="noreferrer">bounces@autox.team.net</a>> <strong>On Behalf Of </strong>fubog1 via Fot<br> <strong>Sent:</strong> Monday, July 16, 2018 6:31 AM<br> <strong>To:</strong> <a rel="noreferrer">rbtr3a@cox.net</a>; <a rel="noreferrer">fot@autox.team.net</a><br> <strong>Subject:</strong> Re: [Fot] Cams</div><div class="m_151265155674621544aolmail_MsoNormal"> </div><div><div class="m_151265155674621544aolmail_MsoNormal"><span style="font-size: 10.0pt; font-family: 'Arial',sans-serif; color: black;">Generally any obvious wear or pitting would make it unserviceable, but the wear isn't always so obvious.</span></div></div><div><div class="m_151265155674621544aolmail_MsoNormal"><span style="font-size: 10.0pt; font-family: 'Arial',sans-serif; color: black;">You can measure the lift and compare to spec, that will show any worn lobes, but the best way is to find someone who has a "cam doctor". It's a machine that sets it up and measures the complete profile.</span></div></div><div><div class="m_151265155674621544aolmail_MsoNormal"><span style="font-size: 10.0pt; font-family: 'Arial',sans-serif; color: black;">Usually if there is anything apparent that suggests that there may be problems, there are...</span></div></div><div><div class="m_151265155674621544aolmail_MsoNormal"><span style="font-size: 10.0pt; font-family: 'Arial',sans-serif; color: black;"> </span></div></div><div><div class="m_151265155674621544aolmail_MsoNormal"><span style="font-size: 10.0pt; font-family: 'Arial',sans-serif; color: black;">Glen</span></div></div><div><div class="m_151265155674621544aolmail_MsoNormal"><span style="font-size: 10.0pt; font-family: 'Arial',sans-serif; color: black;"> </span></div></div><div><div class="m_151265155674621544aolmail_MsoNormal"><span style="font-size: 10.0pt; font-family: 'Arial',sans-serif; color: black;"> </span></div></div><div><div class="m_151265155674621544aolmail_MsoNormal" style="margin-bottom: 12.0pt;"><span style="font-size: 10.0pt; font-family: 'Arial',sans-serif; color: black;">-----Original Message-----<br> From: rbtr3a--- via Fot <<a rel="noopener noreferrer noreferrer">fot@autox.team.net</a>><br> To: fot <<a rel="noopener noreferrer noreferrer">fot@autox.team.net</a>><br> Sent: Sun, Jul 15, 2018 6:47 pm<br> Subject: [Fot] Cams<br> <br> How do I determine if a cam is good or bad. If there are any marks on it does that make it bad. I do know that two of the lifters has pitting on the surface. <br> <br> Ronnie<br> _______________________________________________<br> <a rel="noopener noreferrer noreferrer">fot@autox.team.net</a><br> <br> <a rel="noopener noreferrer noreferrer">http://www.fot-racing.com</a><br> <br> Donate: <a rel="noopener noreferrer noreferrer">http://www.team.net/donate.html</a><br> Archive: <a rel="noopener noreferrer noreferrer">http://www.team.net/pipermail/fot</a><br> Unsubscribe/Manage: <a rel="noopener noreferrer noreferrer">http://autox.team.net/mailman/options/fot/fubog1@aol.com</a><br> <br> </span></div></div></div></div></div></div>_______________________________________________<br> <a href="mailto:fot@autox.team.net" rel="noreferrer" target="_blank">fot@autox.team.net</a><br> <br> <a href="http://www.fot-racing.com" rel="noreferrer noreferrer" target="_blank">http://www.fot-racing.com</a><br> <br> Donate: <a href="http://www.team.net/donate.html" rel="noreferrer noreferrer" target="_blank">http://www.team.net/donate.html</a><br> Archive: <a href="http://www.team.net/pipermail/fot" rel="noreferrer noreferrer" target="_blank">http://www.team.net/pipermail/fot</a><br> Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/fot/tr4racing@googlemail.com" rel="noreferrer noreferrer" target="_blank">http://autox.team.net/mailman/options/fot/tr4racing@googlemail.com</a><br> <br> </blockquote></div></div></html>
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