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 5Likes
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Post By 1985 CCX
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4
Post By 1985 CCX
03-07-2017, 07:23 PM
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CC Member
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Join Date: Aug 2009
Location: Adelaide,
SA
Cobra Make, Engine: AP 289FIA 'English' spec.
Posts: 13,152
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Not Ranked
Correct FIA hood scoop ‘grille’
There were a number of different hole layouts for the ‘grille’ fitted to the hood scoop on FIA cars. Any ideas as to which is most correct? Opinions on what might not be correct are welcome too.
I admit to liking the hole layout on CSX2259’s hood scoop. …and yes I do know its history.
Opinions welcomed.
Cheers,
Glen |
03-07-2017, 08:09 PM
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CC Member
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Join Date: Apr 2004
Posts: 1,029
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Not Ranked
Every baffle pictured on any race roadster by SAI when the cars was new was unique, i.e. every one was custom. Cut and shaped to fit. The details of holes was whatever some fabricator cut. Passed down from ex-SAI team members comments include the intention of the "scoop" was not bring in air but gain clearance over the air horns of the most forward Weber carburetors. E. Weber published a design theory and practice manual. There were guidelines for the minimum clearance over the entrances to air horns. With the scoops completely open, which some car crews did, it is said that high speed air flow balance among air horns inlets was not very good. SAI experimented with a variety of scoop sizes, shapes, and heights. Factory photos were taken of different configurations from different directions to show details. The comments from long ago were that the baffles were installed in attempts to control air flow distrubances over the air horns.
__________________
Dan Case
1964 Cobra owner since 1983, Cobra crazy since I saw my first one in the mid 1960s in Huntsville, AL.
Last edited by Dan Case; 03-08-2017 at 07:10 AM..
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03-07-2017, 10:05 PM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
Ca
Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
Posts: 1,244
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Not Ranked
+1, it was left up to the individual cars crew. The owner of the 2301 car in the states did a similar hole pattern and used wire mesh behind it, that car had a similar history to 2259.
Last edited by CompClassics; 03-07-2017 at 10:09 PM..
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03-08-2017, 03:06 AM
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CC Member
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Join Date: Aug 2009
Location: Adelaide,
SA
Cobra Make, Engine: AP 289FIA 'English' spec.
Posts: 13,152
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Not Ranked
Of course! I knew that! Sometimes you get too close to something and lose perspective.
I'll use 2259 lead.
Cheers,
Glen
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03-08-2017, 02:48 PM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
Ca
Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
Posts: 1,244
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Not Ranked
FYI,
If you look through any of the Cobra related books that are available you can find photos of most any detail item you are looking to ad to your car. The color photos in Friedman's "The Shelby American Original Archieves 1962-1965" has a great color photo of 2259 from the front showing the scoop air diffuser plate.
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03-08-2017, 03:31 PM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 19,011
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Not Ranked
+2
Here is my custom exact to original..... 
Remember the picture above is not the original 2259 hood at all.
2259 is total rebody and as John said look at vintage pics.
Last edited by 1985 CCX; 03-08-2017 at 03:36 PM..
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03-08-2017, 04:00 PM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
Ca
Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
Posts: 1,244
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Not Ranked
Remember the picture above is not the original 2259 hood at all.
2259 is total rebody and as John said look at vintage pics.[/quote]
That's an understatement.
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03-08-2017, 04:02 PM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
Ca
Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
Posts: 1,244
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Not Ranked
Remember the picture above is not the original 2259 hood at all.
2259 is total rebody and as John said look at vintage pics.[/quote]
LOL, thats an understatement!
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03-21-2017, 08:18 AM
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CC Member
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Join Date: Jan 2016
Posts: 498
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Not Ranked
how are the grilles fixed under the hood, glued? welded? riveted?
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03-21-2017, 09:07 AM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 19,011
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Not Ranked
Mine is held with rivet
Last edited by 1985 CCX; 03-21-2017 at 09:17 AM..
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03-22-2017, 10:44 AM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
Ca
Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
Posts: 1,244
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Not Ranked
On the original FIA & USRRC 289 Cobras the defuser plate fit inside the scoop and was riveted. The scoop inlet opening was deeper allowing the diffuser plate to be placed inside the scoop and not very visible from the engine compartment side such as on the Kirkham or SAI Continuation Series Cobras which are more often riveted to the vertical lip on the engine compartment side of the hood scoop (similar to the photo Jeff has in his post).
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