May have been wrong all along

[Bruce Plecan]

Just din't have the dynamic powers of the little guys, having an arguement
over it at the time.   They were in the Falklands if ya remember.
Bruce


----- Original Message -----
From: "Dave Zug" <dzug at delanet.com>
To: <gmecm at diy-efi.org>
Sent: Friday, March 16, 2001 8:14 PM
Subject: Re: May have been wrong all along


> I started saying this (and was ignored, again) about a year ago when I was
> using stock TPI 22's on a 390HP 383. thats a BROAD CURVE 390 HP. The peak
DC
> was 86% for an INSTANT during ONE shift. The other HIGH load DC's were
like
> 60's and 70's.
>
> I now am running the same 383 with 70 extra DYNO's RWHP of N2O sucessfully
> using SVO 24's.  the idle is teriffic (thanks partly.. well, mostly... to
> the new '730 conversion)
>
>
> ----- Original Message -----
> From: Bruce Plecan <nacelp at bright.net>
> To: <gmecm at diy-efi.org>
> Sent: Wednesday, March 14, 2001 7:58 PM
> Subject: May have been wrong all along
>
>
> >
> >
> >
> > Well, at dinner tonight Sleepy and Bashful got into a heated debate, and
I
> > couldn't settle the disbute.
> > The issue was how wrong and yet right GM is in there injector sizing.
> > Lets just look at a 350 v8 say 8D mask.  Bare with me as I just round
> > numbers off.
> >
> > 25 times 8  =  about 200#'s per hour, for a 240 HP engine.  That is way
> over
> > sized.  In the past I just dismissed it as allowing for wear and tear
and
> > some PCV levels elevating.
> >
> > I think the rational, is more the ratio of (yes) the mechanical wear and
> > tear of the system but to make the BL alot more corrective in nature.
ie
> > as long as you have room on the low side of the injectors operating
range
> > you'll be OK.  I see any P+H injector, at it's min linear time will make
> for
> > an easy to tune and FORGIVING calibration.
> >
> > Also, explains SEFI.   By observation of my GN the 40#/hr injectors with
a
> > mild cam was much smoother at idle then the oem ones,  and with the 55s
> are
> > just as smooth as the 40s.   While I could probably twist it's tail and
> run
> > 550 HP that wasn't my goal, but rather I wanted  a least 450 with a
little
> > room for more.  So went with the oversized 55s, but they worked out to
be
> a
> > **nice** size to work with.    Also, reduces the work load on the fuel
> > delivery system.
> >
> > Might again explain some conditions where there is trace detonation when
> > trying to run 350HP which the stock ones should support.
> >
> > In playing with the 355 (cross fire TBI) I had been able to run good
> numbers
> > with the 85s but it just seemed so much easier to get the numbers with
the
> > 95s, even though still at the 325 HP level..
> >
> > YMMV
> > Bruce
> >
>
> --------------------------------------------------------------------------
> --
> > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> > in the body of a message (not the subject) to
majordomo at lists.diy-efi.org
> >
> >
>
> --------------------------------------------------------------------------
--
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
>

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org