[Fot] Mystery cam

Tue Jun 14 21:39:05 MDT 2016

Thanks so much, I can get there from here. It looks about right. Just roughing it out in my head if I moved the intake lobe center to 104 I’d be right about there. I think I’m going to give it a try at 108 and get some dyno time to play with it. 

> On Jun 14, 2016, at 8:33 PM, Preston Kaenel <kaenel at pacbell.net> wrote:
> 
> Attached are two cam cards.
> BFE #23 lobe profile(.376 lift) on 108deg lobe center
> BFE #24 lobe profile(.370lift) on 108deg lobe center
> 
> To my knowledge these are the only two lobe profiles over the last 20 years for BFE cams both with Steve and prior with Babe Erson. Lobe centers have varied from 103 to 108. Even with inverted math your lobe center math should be accurate. If the attachments get stripped, I'll send them to you directly. Don't get much TR time these day, but saw this and hopefully could help a bit.
> 
> Preston
> 
> 
> On Tuesday, June 14, 2016 7:58 PM, Bill Babcock <ponobill at gmail.com> wrote:
> 
> 
> It’s the cam that was working so well. Pretty sure it’s a BFE, but no, I”m not letting this go until I know. Right now the numbers are totally screwball, but I’ll figure it out. 
> 
> 
>> On Jun 14, 2016, at 1:46 PM, Kas Kastner <kaskastner at gmail.com <mailto:kaskastner at gmail.com>> wrote:
>> 
>> It is difficult for me to believe that Bill is just going to say "oh what the hell, I'll just put it in"   :-)
>> 
>> Never be beaten by equipment.
>> 
>> On Tue, Jun 14, 2016 at 10:46 AM, Bill Babcock <ponobill at gmail.com <mailto:ponobill at gmail.com>> wrote:
>> 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.
>> 
>> 
>> > On Jun 14, 2016, at 10:40 AM, Bill Babcock <ponobill at gmail.com <mailto:ponobill at gmail.com>> wrote:
>> >
>> > Oh, and the lift is .372
>> >
>> >
>> >> On Jun 14, 2016, at 10:11 AM, Bill Babcock <ponobill at gmail.com <mailto:ponobill at gmail.com>> wrote:
>> >>
>> >> 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.
>> >>
>> >> I ballparked where I think the cam might want to be and got this for measurements:
>> >>
>> >> 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”
>> >> Intake open .033 @ 36 BTC
>> >> Intaake close .033” @ 76 ABC
>> >> Exhaust open .033” @ 76 ABC
>> >> Exhaust close .033” @ 42 ATC
>> >>
>> >> By my calculations that gives:
>> >> Intake duration 292.0 degrees
>> >> Exhaust duration 298 degrees
>> >> Intake lobe center 110.0 ATC
>> >> Exhaust lobe center 107 BTC
>> >> Overlap 78
>> >> Lobe separation angle 108.5
>> >>
>> >> 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:
>> >>
>> >> What cam is this?
>> >> Where should it be set?
>> >> How much advance?
>> >
>> 
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> 
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> 
> <BFE M23-108.pdf><BFE M24-108.pdf>

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