[DeTomaso] Crane cam 520341

[Charles Engles]

Dear Kirby,

             Thanks!   That is simple enough for me, but I don't think it 
addresses the interesting relationship between the cam LSA and the exhaust 
system efficiency or resistance.   I am probably missing something......


                            Warmest regards,  Chuck Engles




----- Original Message ----- 
From: "Kirby Schrader" <kirby.schrader at gmail.com>
To: "DeTomaso Forum" <detomaso at realbig.com>
Sent: Tuesday, November 18, 2008 7:23 PM
Subject: Re: [DeTomaso] Crane cam 520341


>
> Well, I've always used this to help me towards a marginal
> understanding....
>
> http://www.compcams.com/Technical/FAQ/LSAproperties.asp
>
>
>
> On 18 Nov 2008, at 5:35 PM, Charles Engles wrote:
>
>> Dear Dan,
>>
>>
>>              I am dazzled by your comments and recommendations for
>> exhaust
>> systems and cams in relation to each other.    Based on your
>> recommendations, then the more stock or restrictive the exhaust
>> system, the
>> more the LSA should tend toward 110.   Conversely, the more the
>> exhaust
>> system approaches open headers, then an LSA close to 105 is better.
>>
>>             Dumb question:  is there a reference for this?   It is
>> very
>> interesting.
>>
>>
>>
>>                           Warmest regards,  Chuck Engles
>>
>>
>>
>>
>>
>> ----- Original Message -----
>> From: "Daniel C Jones" <daniel.c.jones2 at gmail.com>
>> To: "DeTomaso Forum" <detomaso at realbig.com>
>> Sent: Tuesday, November 18, 2008 12:33 PM
>> Subject: Re: [DeTomaso] Crane cam 520341
>>
>>
>>> If you stay with restrictive exhaust, don't run 106 LSA.
>>> 108 or 109 would be better.
>>>
>>> Dan Jones
>>>
>>>
>>> On Mon, Nov 17, 2008 at 8:19 PM, Barry Seib <oldwheel at mts.net> wrote:
>>>> Daniel C Jones wrote:
>>>> What is your compression ratio?
>>>>> 10.5 :1
>>>> What sort of exhaust do you have?
>>>>> Stock at present. Considering changes.
>>>> With 106 degrees LSA, you need a really efficient exhaust.  The
>>>> mufflers in particular need to have very little backpressure.
>>>>> I 'd be a little reluctant to get too loud with the mufflers (for
>>>>> long
>>>> trips).
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