[Gmecm] Re: LS1's with fuel leaks

[Frank McCracken]

William, do you know what ecm he was going to use with the dual TBI's?
Frank.


----- Original Message ----- 
From: "William Lucke" <william.lucke at highspeedlink.net>
To: <gmecm at diy-efi.org>
Sent: Monday, May 15, 2006 8:10 AM
Subject: [Gmecm] Re: LS1's with fuel leaks


> Ok, I'll bite... How did you get that big cammed gen III? I think that
> in the VAST majority of cases, it came out of a car in which it already
> had a perfectly serviceable fuel injection setup. Ditching that for a
> carb for "ease of installation" is silly in my opinion, especially
> considering how much you give up (gas mileage, idle quality, etc) and
> the fact that it's more trouble to swap to carb than it is to buy a
> stand alone controller and pre-fabbed wiring harness. There are enough
> people out there doing that that you could likely borrow a couple of
> maps and be running (not fully tuned, but running) next week.
>
> People used to tell me to convert my N* to carb because it's easy and
> cheap... because of the cost of the manifold, the carb and the stand
> alone ignition controller, it would cost MORE to convert to carbeuretion
> than it would to just buy an aftermarket stand alone controller.
>
> There's only one situation in recent memory in which I thought that the
> use of a carb was a good idea, and that was that of a gentleman just
> getting in to tuning his own fuel injection who bought a dual quad
> manifold with dual big block TBI's from ebay. He had purchased a crate
> engine and was going to break it in with the carb because he could tune
> the carb quickly enough to not miss the break-in window, and then
> convert to fuel injection after the break-in.
>
> If the sanctioning body requires a carb, even on late model engines,
> that's a problem with the sanctioning body. Nascar comes to mind...
>
>
>
> Will
>
>
>
> ********
> From: Mike V <efi at dyakron.com>
> Subject: Re: [Gmecm] Re: Bandaid turbo tuning
>
> At 05:53 PM 5/14/2006 -0400, you wrote:
>  > >As evidenced by the carbeuretted manifolds for LS1's. That's just an
>  > >enormous WTF all around.
>  > >
>  > >Another thing I really really don't get are the stand alone ignition
>  > >controllers. People buy digital, PC programmable ignition
> controllers with
>  > >65,443 bells and whistles... and then fuel the engine with a
calibrated
>  > >leak--err... carb.
>  > >
>  > >Talk about neanderthals.
>
>    Let's say you have a big cam  LS-family engine that you
> want to put in a street rod or race car.  A decent carb,
> like say, a demon on an Edelbrock manifold would have
>    you making great power numbers in oh, an hour or
> two with 6PSI of fuel pressure and very few wires to connect.
> Just affordable nuts & bolts.  No PC required (it's optional with MSD box)
> and you benefit from the latest deep breathing port technology.
> Let's face it, the majority of the Gen 3 V8's power numbers don't come
> from computer fuel management.  It's port flow.  They are _really_ good..
> According to the tests, the carby setup makes good power numbers.
> I've drag raced for 30+ years and the last 15 or so have been with ECM
> for fuel & spark management, but if the mission were to have a
> fresh simple LSx powered dragster on the track next week with minimum
>    $$, dyno time & tuning,  the carb setup is a hands down winner.
> It boils down to your objectives.  Edelbrock's was to make a plug/play
> system that makes it simple to use a great new engine design in just
> about any application.  They are supposedly selling a bunch of them.
> My only objection is that they insist on selling it as a whole
> package.  Period.  They won't sell manifolds separately, and
> the Edelbrock ignition box is not PC programmable like the MSD.
> BTW, the Edelbrock carb manifold has injector kits available for max
> effort EFI race apps, as the runners do flow more than most of the
> currently available LS1 manifolds.  Well, at least the ones that cost
>    less than $1200 each.
> On a final note, there are classes in which EFI is verboten, but the
> low-cost/big-power cylinder head tech of the new era engines
> is desired.  MSD also sells a similar box for the late model Ford 4.6
> engine IIRC.
> mv
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