| [GMCnet] FiTech throttle linkage and travel [message #302057] |
Sun, 12 June 2016 16:05  |
Advanced Concept Ener
Messages: 112
Registered: December 2014
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So I installed a FiTech on my 455. Lots of fitment issues they don't talk about. You need to cut bottom off throttle linkage to get clearance above manifold. You need three of those carb spacers to get clearance of butterflies over flanges. 60% of primaries and 40% of secondaries are cut off by gaskets. More on the right than on the left. Can't wait to hear them at full throttle.
I tried every throttle support I could find but wound up building my own out of aluminum angle from Home Depot.
I have adjusted the throttle cable all the way at the engine and under the dash. New cable last year from Alex Sirum. I still need another 2-3 inches to be able to get full throttle opening. Thinking about using squeeze on shots at the gas peddle.
Anybody got any ideas on how to shorten the cable.
I really don't have room at the throttle body to try and extend the arm to get more travel as I think it would interfere with the air filter.
Has anyone else had this issue. Also what have you used at the throttle to attach the cable to the 1/2" hole. Bought the bushing and throttle pin bolt but bushing extends far from shaft ( torquing tb shaft) and throttle pin bolt was too short. Seems like everything about this install in a jury rig.
Jon Darcy ACES
North Jersey 76 stretch, flares, 4 bag, Alcoa's, bunkhouse,MAC Dash
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| Re: [GMCnet] FiTech throttle linkage and travel [message #302059 is a reply to message #302057] |
Sun, 12 June 2016 17:08  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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That can't be the first one ever got put on as a Quadrajet replacement. Call Fitech and "'ast 'em".
--johny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] FiTech throttle linkage and travel [message #302064 is a reply to message #302057] |
Sun, 12 June 2016 19:35 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Forget the squeeze on shots. Grab hold of the gas petal and pull it up bending the rod that the petal is mounted on. The re-adjsut the kick down switch if necessary. I do not know that you will get you 3", but it will put it a whole lot closer. It is very common for this rod to get bent down over the years on GMCs.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] FiTech throttle linkage and travel [message #302066 is a reply to message #302063] |
Sun, 12 June 2016 20:42 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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I know on the MSD units, we use a adapter plate that is about 5/8 thick ,
so we have not noticed any problem with the throttle.
As far as the cable, I'm not sure why there is problem there.
On Sun, Jun 12, 2016 at 4:29 PM, Espen Heitmann wrote:
> Well that sounds pretty normal when you want to mount a squarebore
> EFI/Carb to a spreadbore manifold, and then with the lower GMC/Toronado
> only intake
> ? what did you think it would be like, a straight forward install ?
> --
> 1973 26'-3 # 1460 Parrot green Seqouia Known as the Big Mean Green Machine,
> And just sold my 1973 26'-2 # 581 White Canyon lands under the name
> Dobbelt trøbbel
> in Norway
>
>
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--
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
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www.appliedgmc.com
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