<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">I redid the numbers with the rockers removed, with the dial indicator in the cup of the centered pushrod. Measured open/close at .050. I set the intake lobe center to 108 using .070” before the maximum lift reading (.370) and then got these numbers: </div><div class="">Intake opens (.050”) at 28 BTC</div><div class="">Closes (.050”) at 66 ABC</div><div class="">Exhaust opens (.050”) at 62 BBC</div><div class="">exhaust closes (.050”) 33 BTC</div><div class=""><br class=""></div><div class="">Calculated: </div><div class="">61 degree overlap</div><div class="">274 duration intake</div><div class="">275 duration exhaust</div><div class="">106.75 lobe separation</div><div class="">Intake lobe center 109</div><div class="">exhaust LC 104.5</div><div class=""><br class=""></div><div class="">the calculated intake lobe center using 050” from open/close is a degree more than the measured using .070” before max lift. seems odd, but it's been a long day staring at little numbers. At least it’s starting to look something like a cam. </div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><br class=""><div><blockquote type="cite" class=""><div class="">On Jun 14, 2016, at 4:19 PM, Kas Kastner <<a href="mailto:kaskastner@gmail.com" class="">kaskastner@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">And at what clearance are you getting these numbers? I've a bunch of cam data I can check against and maybe assist here. Are you taking the checking clearance of about.016 or at .050?</div><div class="gmail_extra"><br clear="all" class=""><div class=""><div class="gmail_signature" data-smartmail="gmail_signature"><p class=""><strong class=""><font color="#000099" class="">Never be beaten by equipment.</font></strong></p></div></div>
<br class=""><div class="gmail_quote">On Tue, Jun 14, 2016 at 11:12 AM, Bill Babcock <span dir="ltr" class=""><<a href="mailto:ponobill@gmail.com" target="_blank" class="">ponobill@gmail.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I set it up like a Tiltech 298DX and got:<br class="">
Intake<br class="">
45 BTC<br class="">
71 ABC<br class="">
Exhaust<br class="">
82 ABC<br class="">
35 ATC<br class="">
<br class="">
Intake duration = 296<br class="">
Exhaust duration 297<br class="">
Intake lobe center 103 ADC<br class="">
Exhaust LC 113.5 BTC<br class="">
Lobe sep 108.3<br class="">
Overlap 80<br class="">
<br class="">
Still doesn’t look quite right.<br class="">
<br class="">
<br class="">
> On Jun 14, 2016, at 10:46 AM, Bill Babcock <<a href="mailto:ponobill@gmail.com" class="">ponobill@gmail.com</a>> wrote:<br class="">
><br class="">
> Searching around on the web, it kind of looks like a TilTech 298Dx, but I don’t recall buying a cam from Larry and Tony Garmey doesn’t think so either. I could just set it up as if it were, but it would be good to know.<br class="">
><br class="">
><br class="">
>> On Jun 14, 2016, at 10:40 AM, Bill Babcock <<a href="mailto:ponobill@gmail.com" class="">ponobill@gmail.com</a>> wrote:<br class="">
>><br class="">
>> Oh, and the lift is .372<br class="">
>><br class="">
>><br class="">
>>> On Jun 14, 2016, at 10:11 AM, Bill Babcock <<a href="mailto:ponobill@gmail.com" class="">ponobill@gmail.com</a>> wrote:<br class="">
>>><br class="">
>>> I’m building a new motor for Peyote from the bits of it’s previous engine. I discovered the front main bearing cap was cracked in half when I decided to freshen the motor. I’ll work on replacing the cap later—maybe get a billet one made, but in the meantime I’ve run into a minor problem. I don’t know for sure what cam I have or how it should be set. Tony Garmey says it’s a BFE cam, but I can’t find any specs for those and can’t get ahold of Ken.<br class="">
>>><br class="">
>>> I ballparked where I think the cam might want to be and got this for measurements:<br class="">
>>><br class="">
>>> Reading the Intake and exhaust valve movement from the spring retainers I use 0.033” as the open/close height which is .050/1.45 which as I recall is the ratio of the stock rockers”<br class="">
>>> Intake open .033 @ 36 BTC<br class="">
>>> Intaake close .033” @ 76 ABC<br class="">
>>> Exhaust open .033” @ 76 ABC<br class="">
>>> Exhaust close .033” @ 42 ATC<br class="">
>>><br class="">
>>> By my calculations that gives:<br class="">
>>> Intake duration 292.0 degrees<br class="">
>>> Exhaust duration 298 degrees<br class="">
>>> Intake lobe center 110.0 ATC<br class="">
>>> Exhaust lobe center 107 BTC<br class="">
>>> Overlap 78<br class="">
>>> Lobe separation angle 108.5<br class="">
>>><br class="">
>>> Pretty sure this isn’t exactly where it needs to be. I have a vernier sprocket so I can adjust the timing precisely. My questions are:<br class="">
>>><br class="">
>>> What cam is this?<br class="">
>>> Where should it be set?<br class="">
>>> How much advance?<br class="">
>><br class="">
><br class="">
<br class="">
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