Question about...

[rr]

Ok, maybe you can help with this mystery. What does your engine like
for total wot timing? And the basic engine parts?

Thanks,

BobR.

NRGZ28 wrote:

> The same exact cam I'm running !! lol
>
> ----- Original Message -----
> From: <timsiford at hushmail.com>
> To: <gmecm at diy-efi.org>
> Sent: Thursday, November 16, 2000 9:45 AM
> Subject: Re: Question about...
>
> > Bob,
> >
> > I am running a CompCams Xtreme hydraulic roller.  I pulled the following
> > specs off of Comps Site.  HOWEVER, I had this cam custom ground on a
> 112LSA
> > (before comp offered that as a standard grind) and I am running the cam
> > with 1.6 rollers as compared to the 1.5 ratings.  The specs below are for
> > the 110 LSA version.  They didn't have the specs on the 112 version up yet
> > ...
> >
> > PART # 08-422-8
> > GRIND NUMBER: CS XR270HR-10
> > ENGINE: CHEVY SM BLK 305-350
> >                  INTAKE   EXHAUST
> > VALVE ADJUSTMENT  HYD      HYD
> > GROSS VALVE LIFT   .495     .502
> > .006  TAPPET LIFT  270      276
> > VALVE TIMING     OPEN     CLOSE
> > AT  .006 INT     29 BTDC  61 ABDC
> >          EXH     72 BBDC  24 ATDC
> >
> > THESE SPECS ARE FOR CAM INSTALLED
> > AT  106  INTAKE CENTER LINE
> >                   INTAKE  EXHAUST
> > DURATION AT .050    218      224
> > LOBE LIFT         .3300    .3350
> > LOBE SEPARATION     110
> >
> > Tim
> >
> >
> >
> > At Thu, 16 Nov 2000 11:07:02 -500, rrauscher at nni.com wrote:
> >
> > >
> > >
> > >Tim,
> > >
> > >I was wondering what cam you are running in the 350. (I think
> > >you once posted a CompCams). Believe it or not, with the Isky
> > >cam that I'm running in a 327, I am also running 42deg of
> > >timing at WOT (~12.6afr). Aluminum L98 heads. The difference
> > >in how well the engine runs going from 36/38deg to 42deg is
> > >substantial.
> > >
> > >I approached this value slowly and with caution. Apparently,
> > >with this cam and the valve timing, it likes a lot of ignition
> > >advance. I was surprised at my results. This is supposed to be
> > >due to an early intake closing.
> > >
> > >It will be interesting to get some true wot afr readings. . .
> > >
> > >BobR.
> > >

<snip>


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