Cams timing and all that

[Robert Humphris]

Never thought about the economics of this, low fuel consuption is quite
important when I am off boost, I want a nice run around motor, buzz to
the shops etc... the Jekle/Hyde aspect will come when some Porsche or
such like tries to sniff my tail, then woop 28psi of boost, lots of
pain....

Who says I cant have my cone shaped hat AND eat it?

>----------
>From: 	Joe Boucher[SMTP:BoucherJC at lmtas.lmco.com]
>Sent: 	Friday, March 27, 1998 4:08 PM
>To: 	diy_efi at efi332.eng.ohio-state.edu
>Subject: 	Re: Cams timing and all that
>
>If you were running a higher compression ratio, I would suggest making sure
>your pistons don't rise up and smyth thy pistons, but at 7.5, that won't be
>a problem.
>
>My only thought is drastic changes in cam timing is a compromise.  Other
>factors come into play, such as economics.  I'm too aware of that one.
>
>Joe Boucher
>'70 RS/SS Camaro  '81 TBI Suburban
>
>Robert Humphris wrote:
>
>> Some while back someone wrote that advancing cam timing improved low end
>> response.
>>
>> Now I know that this will result in loss at high end, probably peak
>> torque will move down the rev range please could someone confirm this?
>>
>> The crux of the matter is this:  I am gonna run my engine at 7.5:1 as I
>> want to run silly ammounts of boost.  To help eliminate lag, I was
>> thinking of running a whole load of ignition advance, and advancing the
>> cam to give me a tractable ammount of low end off boost.  No I know that
>> a gain in one area comes with a fall in another... so what pit fall am I
>> going to get here?
>> Is the engine going to get upset with the cam timing and refuse to rev
>> above a certain level? or is there something I just cannot see yet?
>>
>> Rob Humphris
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