Home » Public Forums » GMCnet » FITECH fuel injection and header info (Fuel injection)
| FITECH fuel injection and header info [message #339715] |
Sun, 23 December 2018 17:55  |
sandy trout
Messages: 51
Registered: October 2018
Location: texas
Karma: 1
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78 GMC Royale 26 foot Olds 403 engine
Question: Installing the needed adapter between the OEM intake manifold for the FITECH throttle body to function, will this fit under the engine cover without modification?
Also what header system works on the 403 engine, I am confused on whether the 455 and the 403 used the same part?
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| Re: FITECH fuel injection and header info [message #339728 is a reply to message #339715] |
Mon, 24 December 2018 10:00  |
Scott Nutter
Messages: 782
Registered: January 2015
Location: Houston/San Diego
Karma: 4
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Sandy,
You will need the shortest adapter you can get. Alex Ferrera, MannyTranny, and Jim at Applied GMC will have them. Also you should get the bonnet/air horn to replace the old air cleaner and run a hose to the front of the coach and put the air cleaner there. Good cold air.
Also Alex has a very nice throttle bracket for the manifold.
As far as headers, Jim K at Applied should have them. I went with Doug's headers. I don't know if they are different between engine sizes.
Scott.
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI
Houston, Texas
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| Re: FITECH fuel injection and header info [message #339745 is a reply to message #339715] |
Tue, 25 December 2018 11:09 |
Scott Nutter
Messages: 782
Registered: January 2015
Location: Houston/San Diego
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Yes I do. I went with that MSD Atomic kit. I like that one because the computer module can be placed at a cooler location. Where I believe the Fitech is built into the throttle body. And it can get pretty hot.
But at the same time, there are a lot of fitech's out there .
As far as the heads go, I don't really know much about the 403's. Sorry.
Scott.
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI
Houston, Texas
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| Re: FITECH fuel injection and header info [message #339750 is a reply to message #339715] |
Tue, 25 December 2018 13:56 |
Scott Nutter
Messages: 782
Registered: January 2015
Location: Houston/San Diego
Karma: 4
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Sandy,
What part of Texas are you at? We have a great GMC club in Texas. Several members have the 403's with the modifications you are planning to do (headers,EFI,brakes, and AC blower).
It's called the GMC Classics. You can find the club info on the Internet. Great bunch of people who would love to share their knowledge and installation experiences.
Scott.
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI
Houston, Texas
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| Re: [GMCnet] FITECH fuel injection and header info [message #339766 is a reply to message #339765] |
Wed, 26 December 2018 18:06 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Are you sure that it was FiTec? I have seen Spreadbore injector bodies for
Holley "Sniper" systems, but not for the FiTec.
If you are correct, it should fit the GMC motorhome without raising
the hatch cover up. That would make it a much more attractive package.
Now, if they would just use smaller injectors in the primaries, and
couple that with variable ignition timing, we could get some fuel economy
out of this deal as well as throttle response and vapor lock improvement. A
guy can wish.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Wed, Dec 26, 2018, 11:03 AM Chris Tyler Fitech recently added a spread bore version, so no adaptor needed[/color]
> --
> 76 Glenbrook
>
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| Re: [GMCnet] FITECH fuel injection and header info [message #339767 is a reply to message #339766] |
Wed, 26 December 2018 18:12 |
Mike Kelley
Messages: 467
Registered: February 2017
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James H.:
Sounds like you should be a consultant to Fitek!!! Bet they could sell a lot of units to GMCers if set up properly for us and recommended by a GMC expert!!!
Mike/The Corvair a holic
76 Eleganza II 26’
76 Glenbrook 28’ stretch
78 Glenbrook 26’ project coach
Sent from my iPhone
> On Dec 26, 2018, at 6:06 PM, James Hupy wrote:
>
> Are you sure that it was FiTec? I have seen Spreadbore injector bodies for
> Holley "Sniper" systems, but not for the FiTec.
> If you are correct, it should fit the GMC motorhome without raising
> the hatch cover up. That would make it a much more attractive package.
> Now, if they would just use smaller injectors in the primaries, and
> couple that with variable ignition timing, we could get some fuel economy
> out of this deal as well as throttle response and vapor lock improvement. A
> guy can wish.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>
>> On Wed, Dec 26, 2018, 11:03 AM Chris Tyler >
>> Fitech recently added a spread bore version, so no adaptor needed
>> --
>> 76 Glenbrook
>>
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| Re: [GMCnet] FITECH fuel injection and header info [message #339769 is a reply to message #339766] |
Wed, 26 December 2018 18:58 |
powwerjon
Messages: 849
Registered: March 2013
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The Holley EFI offers a spread bore system as a quadrajet in their Sniper EFI line.
https://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_quadrajet/
JR Wright
GMC GreatLaker
GMCMI
GMC Eastern States
Michigan
On Location inTucson
> On Dec 26, 2018, at 5:05 PM, Jim Kanomata wrote:
>
> I had Gary check int this, where did you get the info?
> Gary call the fatory and was told NO.
>
> On Wed, Dec 26, 2018 at 11:03 AM Chris Tyler
> wrote:
>
>> Fitech recently added a spread bore version, so no adaptor needed
>> --
>> 76 Glenbrook
>>
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>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
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| Re: FITECH fuel injection and header info [message #339777 is a reply to message #339715] |
Thu, 27 December 2018 09:31 |
Scott Nutter
Messages: 782
Registered: January 2015
Location: Houston/San Diego
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Sandy,
I don't know if you can use the Edelbrock intake manifold without cutting and raising the hatch. Seems to me that when I was reading the installation manuals (can't remember if it was the MSD or Fitech) they recommended not going with hard fuel lines.
Also maybe replace all your body pads. That will give you at least another 1/4 inch clearance at the hatch. And that could be big....
Scott.
BTW, we have a very knowledgeable GMC'er just a few miles north of you. I can get his number for you if you need...
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI
Houston, Texas
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| Re: FITECH fuel injection and header info [message #339778 is a reply to message #339715] |
Thu, 27 December 2018 10:45 |
powerjon
Messages: 2446
Registered: January 2004
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When running the 403 or 455 with the carb on top the clearance is about the same with the stock manifold and the manifold sit down as compared to the Edelbrock aluminum manifold which will raise the whole combination maybe 2+" above stock location. If you can get it under the engine cover it will require an extremely short snorkle on the carb, EFIi or what ever you run to an external air cleaner assembly. I have see this done on a few installation and you will also need to take a router to the hatch cover to clarence a few items. We own one of the Buskirk stretch coaches and the body is raised up 2" by the use of aluminum spacers on every body cross member and spacers on the rubber body mounts. This allows the installation of EFI type of induction without the problems of engine cover interference.
J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] Fitech fuel injection and header info [message #339780 is a reply to message #339779] |
Thu, 27 December 2018 12:14 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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The last statement is important, and it’s why I did the same.
I carry a spare ECU, Water Pump, Alternator and Starter.
The spare ECU was $10 at the local u-pull it.
The rest is literally immediately available (or overnight, and it’s not like you don’t have a place to sleep)
Dolph
DE AD0LF
Wheeling, West Virginia
1977 26’ ex-PalmBeach
Howell EFI & EBL, Reaction Arms, Sullybilt Bags, Manny Transmission
“The Aluminum and Fiberglass Mistress"
> On Dec 27, 2018, at 12:46 PM, Bob Dunahugh wrote:
>
> I put in the GM Howell system with spark control. I had no hatch clearance issues. And I can walk into any parts store for parts. Bob Dunahugh
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| Re: [GMCnet] Fitech fuel injection and header info [message #339781 is a reply to message #339780] |
Thu, 27 December 2018 12:51 |
JerryW
Messages: 256
Registered: August 2018
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However I’ve had a Howell system for many years (over 15) and I’ve never needed a spare part for it. It is very reliable. I’ve needed a module and a rotor for the distributor but that really wasn’t part of the Howell setup.
Emery Stora
77 Kingsley
Frederick, CO
> On Dec 27, 2018, at 11:14 AM, Dolph Santorine wrote:
>
> The last statement is important, and it’s why I did the same.
>
> I carry a spare ECU, Water Pump, Alternator and Starter.
>
> The spare ECU was $10 at the local u-pull it.
>
> The rest is literally immediately available (or overnight, and it’s not like you don’t have a place to sleep)
>
>
> Dolph
>
> DE AD0LF
>
> Wheeling, West Virginia
>
> 1977 26’ ex-PalmBeach
> Howell EFI & EBL, Reaction Arms, Sullybilt Bags, Manny Transmission
>
> “The Aluminum and Fiberglass Mistress"
>
>> On Dec 27, 2018, at 12:46 PM, Bob Dunahugh wrote:
>>
>> I put in the GM Howell system with spark control. I had no hatch clearance issues. And I can walk into any parts store for parts. Bob Dunahugh
>> _______________________________________________
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| Re: [GMCnet] Fitech fuel injection and header info [message #339782 is a reply to message #339781] |
Thu, 27 December 2018 14:09 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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The Howell system, with the EBL, coupled with the GM throttle body with the
correct injectors for the displacement of the engine, and properly tuned,
is as reliable as any GM vehicle from that era.
ALMOST as reliable as an anvil, and about as hard to break. When the
aftermarket fuel injection systems have as much experience as GM does with
their systems, I suspect that they will have similar reliability.
They will probably never have the availability of GM when it comes to
sensors, etc. Only time will tell.
Nobody wants to be broken down beside the road, so, reliability is the
FIRST ORDER OF BUSINESS.
The same thing applies to any modification that you (or I) make to
your coaches, and is measured by that yardstick.
Jim Hupy
Salem, Oregon
78 GMC ROYALE 403
On Thu, Dec 27, 2018, 10:51 AM Emery Stora via Gmclist <
gmclist@list.gmcnet.org wrote:
> However I’ve had a Howell system for many years (over 15) and I’ve never
> needed a spare part for it. It is very reliable. I’ve needed a module and
> a rotor for the distributor but that really wasn’t part of the Howell
> setup.
>
> Emery Stora
> 77 Kingsley
> Frederick, CO
>
>> On Dec 27, 2018, at 11:14 AM, Dolph Santorine
> wrote:
>>
>> The last statement is important, and it’s why I did the same.
>>
>> I carry a spare ECU, Water Pump, Alternator and Starter.
>>
>> The spare ECU was $10 at the local u-pull it.
>>
>> The rest is literally immediately available (or overnight, and it’s not
> like you don’t have a place to sleep)
>>
>>
>> Dolph
>>
>> DE AD0LF
>>
>> Wheeling, West Virginia
>>
>> 1977 26’ ex-PalmBeach
>> Howell EFI & EBL, Reaction Arms, Sullybilt Bags, Manny Transmission
>>
>> “The Aluminum and Fiberglass Mistress"
>>
>>> On Dec 27, 2018, at 12:46 PM, Bob Dunahugh
> wrote:
>>>
>>> I put in the GM Howell system with spark control. I had no hatch
> clearance issues. And I can walk into any parts store for parts. Bob
> Dunahugh
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: FITECH fuel injection and header info [message #339784 is a reply to message #339715] |
Thu, 27 December 2018 15:40 |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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Bounds was using hockey pucks as body pads. As a Canadian, I can tell you that hockey pucks are near hard as a rock, no give there!
Not sure what the issue is with metal fuel lines. I think they would last longer with ethanol and take the road debris better.
One thing I do know after 40+ years in electronics, is they don't like heat. The hotter the environment, the shorter their life. In the parts specs it will show expected life vs operating temperatures. Automotive spec is -40 to +125C which is fine as long as air is flowing. Pull off the hyway to get gas, shut engine off and its going to be much hotter on top of the engine.
Like Jim and Bob said, with a GM based system, you can get parts anywhere, but they are very reliable because the electronics are inside where its cool.
JMHO
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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| Re: [GMCnet] Fitech fuel injection and header info [message #339788 is a reply to message #339779] |
Fri, 28 December 2018 01:04 |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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FYI on 403 intake manifolds. The 403 is lower then the 455. Thus the 403 can use the taller GM Olds car, aluminum or iron intake manifolds. But both end up having the carb mounting surface at the same height in relationship to the bottom of the hatch.
As to EFI systems. The Howell system IS a GM designed system that has had a Steller reputation, and service life since 1987. I put it on our 78 403. Has performed perfectly ever since the first day I installed it. Even when I didn't set the correct spark timing. The EFI system corrected my error on it's own. With the 3:70 FD, and the GM/Howell EFI. Our MPG has increase nicely. But the instant starting/stopping, smoother running, performance increase, and cleaner oil in the pan. With our GVW runs in the 17,000 to 24,000 LBS range all the time. These are qualities that I truly need. At the 17,000 GVW. Our MPG has been generally around 8.9. No headers, and the stock 2.5 tail pipe. Speeds from 60 to 65mph. We are always towing Linda's 5,000LBS handicap lift van. Or my 24 ft enclosed car hauler. With a car inside. Thus I have no idea what MPG it would get not towing. Bob Dunahugh 78 403 Royale Mouse House
________________________________
From: Bob Dunahugh
Sent: Thursday, December 27, 2018 11:46 AM
To: gmclist@list.gmcnet.org
Subject: RE: Fitech fuel injection and header info
I put in the GM Howell system with spark control. I had no hatch clearance issues. And I can walk into any parts store for parts. Bob Dunahugh
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