I set it up like a Tiltech 298DX and got:
Intake
45 BTC
71 ABC
Exhaust
82 ABC
35 ATC
Intake duration = 296
Exhaust duration 297
Intake lobe center 103 ADC
Exhaust LC 113.5 BTC
Lobe sep 108.3
Overlap 80
Still doesnâ??t look quite right.
> On Jun 14, 2016, at 10:46 AM, Bill Babcock <ponobill@gmail.com> wrote:
>
> Searching around on the web, it kind of looks like a TilTech 298Dx, but I
> donâ??t recall buying a cam from Larry and Tony Garmey doesnâ??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@gmail.com> wrote:
>>
>> Oh, and the lift is .372
>>
>>
>>> On Jun 14, 2016, at 10:11 AM, Bill Babcock <ponobill@gmail.com> wrote:
>>>
>>> Iâ??m building a new motor for Peyote from the bits of itâ??s previous
>>> engine. I discovered the front main bearing cap was cracked in half when I
>>> decided to freshen the motor. Iâ??ll work on replacing the cap
>>> laterâ??maybe get a billet one made, but in the meantime Iâ??ve run into a
>>> minor problem. I donâ??t know for sure what cam I have or how it should be
>>> set. Tony Garmey says itâ??s a BFE cam, but I canâ??t find any specs for
>>> those and canâ??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 0.033â?? as the open/close height which is .050/1.45 which as I recall
>>> is the ratio of the stock rockersâ??
>>> Intake open .033 @ 36 BTC
>>> Intaake close .033â?? @ 76 ABC
>>> Exhaust open .033â?? @ 76 ABC
>>> Exhaust close .033â?? @ 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 isnâ??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?
>>
>
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Donate: http://www.team.net/donate.html
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
Unsubscribe/Manage:
http://autox.team.net/mailman/options/fot/mharc@autox.team.net
|