| Fuel Injection [message #303100] |
Tue, 05 July 2016 11:21  |
homer
Messages: 73
Registered: April 2011
Location: arizona/ BC canada
Karma: 0
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looking for advice on the type of fuel injection for the 455 cost/make and is it worth -while have been told you can get better mpg its cleaner and cuts down on sound a little. any thoughts. would be appreciated. Homer
homer
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| Re: Fuel Injection [message #303113 is a reply to message #303109] |
Tue, 05 July 2016 12:34  |
homer
Messages: 73
Registered: April 2011
Location: arizona/ BC canada
Karma: 0
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I travel about 7 to 8000 tho per year, 10 mpg would be great. not to hard on the pedal and at best get around 7.my motor was overhauled 2 yrs back. all-ways looking to improve homer.
homer
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| Re: Fuel Injection [message #303114 is a reply to message #303113] |
Tue, 05 July 2016 12:55 |
mrgmc3
Messages: 210
Registered: September 2013
Location: W Washington
Karma: 2
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If you are not towing or in mountainous terrain and you are getting 7 mpg then you need a tune-up! A properly tuned carbureted GMC should get at least 9 mpg on level ground averaging 60-65 mph. I have managed over 10'with mine (no towing, dash air on, generator off, 65 mph). I have gone through and set base timing at 12 degrees, ensured the mech and vac advance work, and spent time dialing the Qjet in with the help of an A/F meter (15.5:1 at cruise, 14.5:1 around town, 10.5:1 on steep grades)
As always "your mileage may vary"
Chris Geils - Twin Cities / W Wa
1978 26' Kingsley w/ very few mods; PD9040, aux trans cooler, one repaint in stock colors, R134a, Al rad, Alcoas, 54k mi
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| Re: Fuel Injection [message #303130 is a reply to message #303100] |
Tue, 05 July 2016 17:26 |
Bob S.
Messages: 143
Registered: October 2012
Location: Rapid City, SD
Karma: 2
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Homer, I bought my coach 3.5 years ago and it came with an archaic "Air Sensor" EFI on it. It seemed to work ok but I was concerned about the availability of parts when it failed. I took it off and installed Professional Product's Powerjection III on it. I was fairly well satisfied with this system until it completely failed earlier this year, and learned that I couldn't get it repaired for at least 6 weeks(evidently this was a problematic system). That system set me back about $2000.00. Not wanting to wait 6 weeks to get my coach running, I ordered and installed the Fitech system that has been discussed on this forum. It set me back exactly half of what the previous system did and it works wonderfully. Furthermore, when I had questions, their tech support was available quickly and answered all my questions professionally. I would highly recommend the Fitech system, for ease of installation, good support staff and of course a reasonable cost. Oh by the way I did realize a little bump in fuel mileage but not enough to offset the cost of the system any time soon.
Bob and Pam Schilling
Rapid City, SD
"78 Royale
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| Re: [GMCnet] Fuel Injection [message #303140 is a reply to message #303130] |
Tue, 05 July 2016 23:04 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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We sell MSD, Howell, and Holley systems.
The one I endorse id the Howell with the EBL option as parts a re readily
available and the tech support is 7 days a week and we have several GMC
owners that can hook up to your unit to see what is happening.
The Howell unit we sell has the EBL ECM which controls the ignition timing
so well, that you will see performance and milage. I openly tell people
they can be assured 1-2mpg improvement.
The Holly system is also good as it does control ignition timing, but
requires one to program it and takes time to map out the fuel and timing
for loads and temperature.
EBL from us comes with the latest fuel and timing curves for all conditions
, plug and play.
I have been running EFI since 1990 so in many ways I know what timing can
do.
On our coaches, I have a fairly good handle on the fuel deliver from tht
tank to the injectors. Without the experience, you can end up with any EFI
with vapor lock..
On Tue, Jul 5, 2016 at 3:26 PM, Bob Schilling
wrote:
> Homer, I bought my coach 3.5 years ago and it came with an archaic "Air
> Sensor" EFI on it. It seemed to work ok but I was concerned about the
> availability of parts when it failed. I took it off and installed
> Professional Product's Powerjection III on it. I was fairly well satisfied
> with this
> system until it completely failed earlier this year, and learned that I
> couldn't get it repaired for at least 6 weeks(evidently this was a
> problematic
> system). That system set me back about $2000.00. Not wanting to wait 6
> weeks to get my coach running, I ordered and installed the Fitech system
> that
> has been discussed on this forum. It set me back exactly half of what the
> previous system did and it works wonderfully. Furthermore, when I had
> questions, their tech support was available quickly and answered all my
> questions professionally. I would highly recommend the Fitech system, for
> ease
> of installation, good support staff and of course a reasonable cost. Oh by
> the way I did realize a little bump in fuel mileage but not enough to
> offset the cost of the system any time soon.
> --
> Bob and Pam Schilling
> Rapid City, SD
> "78 Royale
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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