The running clearance for any particular profile is a critical part of the
overall design. It's based largely on accelerations (both ways) & if the
clearance ramp isn't correct there will be conflicting forces in the valve
train,
& resultant wear/breakage.
I advise following cam manufacturers specs. Assuming that weights, geometry,
ratio, materials, etc are all to spec, this will give the best results.
FWIW...
Glen
In a message dated 10/20/2007 10:56:02 AM Eastern Daylight Time,
awashatko@wi.rr.com writes:
Dennis,
I ran my cam grinder's recommendation of .020 intake and .022 exhaust
and ended up with hammered valve stems. I now run .015 intake and .016
exhaust with good results. CR is 11.8:1.
Allen
On Oct 20, 2007, at 8:18 AM, Dennis DeLap wrote:
> Thanks to all for their "Isky" input.
>
> I got this 777 cam from our friend Irv Korey - he had a bunch of
> extra race parts in his warehouse. Sounds like it is alot like the
> Kastner "F" cam - identical duration anyway.
>
> .........and Kas the .028 does seem extreme - alot of slop.
>
> Another question - I have been building my engines with compression
> ratios in the 10.7 to 1 range. I notice that the competition manual
> asks for a minimum of 11.7 to 1. How important is this to the
> function of the race cam?
>
> Dennis
>
> Kas Kastner <kaskas@cox.net> wrote:
> Just as an observation, but .028" sounds like a lot.
>
>
>
>
> ---- Original Message -----
> From: "David W. Riddle"
> To:
> Sent: Friday, October 19, 2007 6:28 PM
> Subject: Re: [Fot] ISKY "777"
>
>
>> Isky website is showing no info available
>>
>> http://www.iskycams.com/makesearch.php?catid=127&engine_id=306
>>
>> But the online catalog for the TR-777 says:
>>
>> http://www.iskycams.com/onlinecatalog.html
>>
>> Intake 40-80
>> Exhaust 80-40
>> Valve Lift .480
>> Valve Lash Hot .028
>> Duration 300 degrees
>>
>>
>> At 05:44 AM 10/19/2007, you wrote:
>>> AMICI
>>>
>>> Does anyone have cam timing and spec info for the Iskenderian "777"
>>>
>>> Thanks
>>> Dennis DeLap
>>> _______________________________________________
>>> http://www.team.net/donate.html
>>>
>>> dave@microworks.net
>>> Fot mailing list
>>> Fot@autox.team.net
>>> http://autox.team.net/mailman/listinfo/fot
>> _______________________________________________
>> http://www.team.net/donate.html
>>
>> kaskas@cox.net
>> Fot mailing list
>> Fot@autox.team.net
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> yellow-green@sbcglobal.net
> Fot mailing list
> Fot@autox.team.net
> http://autox.team.net/mailman/listinfo/fot
> _______________________________________________
> http://www.team.net/donate.html
>
> awashatko@wi.rr.com
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>
>
A l l e n W a s h a t k o
1971 TR6 - Number 6
fubog1@aol.com
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