Re: 383 TPI Dyno runs

[romans@starstream.net (Romans, Mark)]

Dave:  If you ran the "HOT" cam with 1.5 rocker, it's only .492 lift.  The
.525 is
with 1.6 rockers.  Also when you are looking at 29 degrees on your spark map
remember that there is a WOT spark adder in stock calibrations.
Mark
----- Original Message -----
From: "Dave Zug" <dzug@delanet.com>
To: <gmecm@diy-efi.org>
Sent: Tuesday, February 06, 2001 7:41 PM
Subject: Re: 383 TPI Dyno runs


> The HOT cam has too much lift for my valve springs (510 max springs). I
knew
> I would still be in need of duration, but the ZZ3 cam had a really nice
> price tag, and the car is a street runner.
>
> Yes, I have ONE port finished on the new lower intake ;-) I have till the
> 23rd to get it done, then another run at it.
>
> My chip is still stock spark advance.. I got 7 hp with 3 more degrees
> between 3500 and 4500. Its at 29 degrees at WOT.. still some room to push.
>
> The cam was definetly off a tooth - the shop did that.. I fixed it. then I
> did a poor mans degree-in and it came up dead on. They missed the 0.1 oil
> squirters to the timing chain too, and the oil pan grooves, and the cam
> clearance to the rod bolts, and the oil pan dings, ..,..  I educated them
> big time. They even wanted me to pay for 3 tear-downs  HA!
>
> The 400 is at a different shop.
>
>
> ----- Original Message -----
> From: <timsiford@hushmail.com>
> To: <gmecm@diy-efi.org>
> Sent: Monday, February 05, 2001 5:25 PM
> Subject: Re: 383 TPI Dyno runs
>
>
> >
> > >Seems to drop off more severely and earlier then I expect, but only
> > >300 =
> > >rpm earlier.
> >
> > Dave,
> > You know everything that I am going to say :-)
> > 1) I would *almost* bet that one of the reasons is your stock lower
> intake.
> >  Lucky for you that you have a *nice* one that is almost ready to go on?
> > 2) Camshaft is WAY small.  I never realized you were running  a cam that
> > small.  At the very least I would be running a HOT cam.
> > 3) Did you leave the cam's timing as shown in this pic?!  The machine
shop
> > definitely had it installed one tooth off.
> >
> > My guess is that at least 40rwhp is being lost by the cam and intake
> (conservatively).
> >
> > Tim
>
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