New cam for TPI 350

[James Adams]

I ran a 350 TPI in an '84 Camaro with an LT1 cam(1996
roller, not 1970), mildly ported heads, 6 speed, and
3.45 gears.  It would light up the tires just about
anytime, but the intake system would run out of air at
about 4700 RPM.  Put more cam in and you just lose low
end that you can't gain at the top unless you mod the
intake system.  The throttle body alone won't gain you
much as the runners and base are both limiting airflow
as well.

--- Bruce <nacelp at bright.net> wrote:
> 
> From: "Dan Zorde" <dzorde at erggroup.com>
> Subject: New cam for TPI 350
> > Does anyone have any experiences with the
> CraneCams H-278-2 cam in a TPI
> > 350 ?
> > The application is roughly 1700kg car with 5speed
> manual, 3.08 diff,
> > Sportsman 2 heads (circuit work, hill climbs,
> autokhanas, NO drag
> > racing).  TPI is controlled by aftermarket MAP
> system with no closed
> > loop control.
> > Really just want to settly my worries that the cam
> may loose too much
> > vacuum at idle, hence resulting in idle problems
> (also have no idle
> > control motor, system just relies on a fixed size
> bypass hole for idle
> > air).
> 
> My 270 was border line grief for daily use.  General
> driving was fine
> prolonged stop and go would start to load up.  I had
> min the off idle timing
> to keep it from lighting the tires so much.  Other
> then under a major
> traffic jam, was fun
> 
> > Also, I'm told the standard throttle body is good
> for around 650cfm, can
> > anyone tell me if I'm starting to get close to
> that limit with this
> > setup and if I need to look at going to a larger
> size ?
> 
> Dual 2" butterflies are about 670, as claimed my
> Holley in some of their
> lit, and it follows with some of what I've seen. 
> The dual 2s were a delite
> for mild 320ish HP set up.
> But just enough, using 5K ish shift point.  More cam
> and buzzing it higher
> I'd want more air
> Bruce
> >
> > rgds
> >
> > Dan  dzorde at erggroup.com
> >
> > ---------------------------- ERG Group
> --------------------------
> >  The contents of this email and any attachments
> are confidential
> >  and may only be read by the intended recipient.
> >
>
-----------------------------------------------------------------
> >
> >
>
--------------------------------------------------------------------------
> --
> > To unsubscribe from diy_efi, send "unsubscribe
> diy_efi" (without the
> quotes)
> > in the body of a message (not the subject) to
> majordomo at lists.diy-efi.org
> >
> 
>
----------------------------------------------------------------------------
> To unsubscribe from diy_efi, send "unsubscribe
> diy_efi" (without the quotes)
> in the body of a message (not the subject) to
> majordomo at lists.diy-efi.org
> 


__________________________________________________
Do You Yahoo!?
Send your FREE holiday greetings online!
http://greetings.yahoo.com
----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org