| Re: [GMCnet] Utter disapointment. [message #323751 is a reply to message #323746] |
Mon, 11 September 2017 07:40   |
Richard Denney
Messages: 920
Registered: April 2010
Karma:
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Senior Member |
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Bob, I envy you for the GM parts houses in your area, but around here
nobody ever has anything in stock NOW. I have to chase all over town to get
even simple things for my (current) cars.
I have a plain old carburetor, but if something in it failed, I'd still
have to jerry-rig something to get home. For example, a choke pulloff at
the local GM (name the brand) dealership? Not in most places. And certainly
not at autoparts stores.
I'm not sure that Holley throttle body would be any less available than a
Rochester throttle body.
This is, of course, the problem with the all-in-one units like FITech. If
something in them fails, you have to replace the whole unit. That's an
expensive spare to carry around. But you can carry the carburetor as a
spare. I think we've seen one sudden and unexpected failure so far. The
other problem with FITech (for some) is that it lacks spark control, but
that makes it an interesting alternative for early coaches that don't have
HEI ignition. It DOES have closed-loop mixture control. And it runs from an
intermediate tank that is fed by existing low-pressure pumps, so if it
fails and you put a carb on the engine, it's easy to get low-pressure to
the carb. And the final advantage is that it is easy--it does not use that
complicated wiring harness.
The heat durability problem of the internal integrated circuits in the
FITech is a problem for me as for others. But there are many on the road
now, so we'll start to get a sense of their durability over the next year
or so, I think. The air coming into the throttle body can be cooler than
the air anywhere in the engine compartment, and they are probably using
that to cool their chips. I think I would plumb a cold-air induction system
if I used the FITech. It would be interesting for someone who has handled
one to inspect it for internal cooling pads or fins.
Rick "who has to special-order everything, it seems" Denney
On Mon, Sep 11, 2017 at 1:13 AM, Bob Dunahugh wrote:
> David. We don't fight, or slam each other ever. Love the people here. Each
> system has their pros, and cons. And it comes down to YOUR comfort zone. I
> picked the Howell. It's a long tried system that GM started using back in
> 1987. And you never heard of issues with their components. Mine has the GM
> 454 TB with the Olds 307 computer controlled Distributor. Not the Holly.
> The Holly TB is good. But I wanted a total GM setup. As our failures are
> never at home. And always on the road. It was VERY important for me. To be
> able to walk into any parts store in North America. And more then likely.
> They'd have the part I needed NOW. On hand. I thought the system was fairly
> simple to install. Started right up. Nothing needed adjusting. Had to make
> some small brackets for components. A down side was that the GM 454 TB
> required more foot throttle pressure then stock. So I made a 1 inch
> aluminum bracket that solved that issue. Feels stock now. ( If anyone
> needs that throttle bracket. Let me know. ) I like the Engine Check light
> with the test port. A nice chunk of the mileage, and performance comes from
> the EFI controlled distributor. This Is MY take on the subject.
>
> Bob Dunahugh
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--
'73 X-Glacier 230 "Jaws"
Northern Virginia
Offlist email: rick at rickdenney dot com
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