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Author
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Topic: Whats a better intake C9OX or F4B
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DocVoodoo
Gearhead Posts: 164
From: Plainfield CT USA
Registered: Feb 2003
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posted 06-07-2004 06:43 PM
 
Just picked up a C9OX intake at carlise. Whats the better intake the F4B I have on now or the C9OX . I am running a 289 with a comp Cam 270HR roller http://www.compcams.com/Technical/CurrentCatalog/HTML/68-75.asp , Holley 600 DP , Tri Y headers and over sized Valves 351 size that are in 289 heads. ------------------
1966 GT light blue VERT
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whiteknight289
Gearhead Posts: 1391
From: Wheaton, IL, USA
Registered: Mar 2004
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posted 06-07-2004 07:04 PM
Doc,
What trans are you running, and are you happy the idle quality of that cam?I'm sure Alex (MoneyMaker) will tell you the C9OX, he has experience with them. By the way, what did you have to pay for the C90X and what shape is it in? ------------------
MCA Certified Judge, 1965-1966
66 GT coupe A code, Silver Frost
65 coupe modified - the White Knight
66 convert being restored
95 GT convertible/Cobra clone - black with white leather
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DocVoodoo
Gearhead Posts: 164
From: Plainfield CT USA
Registered: Feb 2003
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posted 06-07-2004 07:16 PM
Perfect shape 200 bucks at carlise this past weekend. The original price was 250 . There were some with Ford Or Cobra on them for alot more. like 375 to 400 bucks Running a T-10 4 speed side loader. I figure the F4b to be worth around 150 bucks I may be Wrong
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Daniel Jones
Gearhead Posts: 972
From: St. Louis, MO
Registered: Aug 99
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posted 06-07-2004 08:00 PM
You may have a reproduction, not original Ford C90X. Are the ports larger than a 289 head? Does it have 4 small stamped letters in one of the corners? If so, what do they read? Dan Jones
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whiteknight289
Gearhead Posts: 1391
From: Wheaton, IL, USA
Registered: Mar 2004
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posted 06-07-2004 08:31 PM
I've got a C90X, a F4B, a Cobra, and an early Cobra dual quad for the Carters. Guess I just can't make up my mind which one to run on which car!I think you're right on with the pricing. My C9 intake is kinda rough so I got it for only a C-note. The others I don't know what I've got in them because I've done so many layers of swapping and trading I can't remember what my original cash investment was. I think the F4B I've got about $75 - $100 in it, the dual quad Cobra initially cost me $300 with two carbs, but I later sold off the carbs for about $400 total. They were both wrong for this intake, I think one was a Hemi carb and the other off a 409. The single cobra I think I paid $150 for decent used. ------------------
MCA Certified Judge, 1965-1966
66 GT coupe A code, Silver Frost
65 coupe modified - the White Knight
66 convert being restored
95 GT convertible/Cobra clone - black with white leather
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DocVoodoo
Gearhead Posts: 164
From: Plainfield CT USA
Registered: Feb 2003
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posted 06-07-2004 09:17 PM
ports are the same in length but they are Wider then original. There are no letters just the serial# on the back with the C90X
anf a fireing order up front. Were the Ford Or Cobra lettering would be is Blank. I don't think this is a repro it looks like the real deal . I looked at quit a few over the weekend with and with out the cobra .------------------
1966 GT light blue VERT
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DocVoodoo
Gearhead Posts: 164
From: Plainfield CT USA
Registered: Feb 2003
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posted 06-07-2004 09:24 PM
well just googled it looks to me that the lettered ones command more money even the ones that say ford. But there are unlettered ones. Cobra and shelby lettering get the most 400 bucks for those 350 for the ones with ford. Looks like I did just fine . This web page had an F4b for 175 bucks.
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whiteknight289
Gearhead Posts: 1391
From: Wheaton, IL, USA
Registered: Mar 2004
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posted 06-07-2004 11:35 PM
Just cecked on Ebay, there's a F4B intake expiring in a couple days, its only at $38 so far.
A butched up cobra intake is only at $20! I think installed you wouldn't see the area that was modified.
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DocVoodoo
Gearhead Posts: 164
From: Plainfield CT USA
Registered: Feb 2003
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posted 06-07-2004 11:45 PM
well it looks to me that they are super close. It also looks like as far as a duel plane goes it hung right with the single plane until the upper RPM. It is old and I am sure there has got to be something new out there that is better but it looks to me for vintage mods this is the way to go. Why is it that the C90X commands more money then the F4B ? is it all in the name ? or is there a slight diffrence.Take a look at this old article on it http://www.jason.fletcher.net/tech/intakes/intakes.htm ------------------
1966 GT light blue VERT [This message has been edited by DocVoodoo (edited 06-07-2004).]
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DocVoodoo
Gearhead Posts: 164
From: Plainfield CT USA
Registered: Feb 2003
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posted 06-07-2004 11:51 PM
Also if I am useing mod 289 heads they have larger intake and exaust valves . In order to get the most out of these do I have to have them port matched sine the width looks diffrent? the intake looks wider then the original head intake ports
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Ryan Wilke
Gearhead Posts: 3237
From: Stanton, Michigan, zip 48888
Registered: Oct 2000
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posted 06-08-2004 12:54 PM
Here is some info from a M&M search: ....these manifolds were produced for the now obsolete "Ford Power Parts" Program of the 60's/70's. The FPP kit consisted of pop up pistons, 351W heads, GT-40 valves, 390 GT springs and retainers, and a C90X intake. The manifolds that were cast as C90X-9424-B were for 289/302s and those cast as C90X-9424-A were for 351W blocks. According to Alex, "Both the 351 and 289 intakes had the FORD block letters. The only deviations were the 69-70 Shelby GT-350 factory equiment versions that had the SHELBY letters. No FORD on the 289 intake = no C90X. The intended purpose of the C90X was for the 351 head conversion on a 289. It was first offered in the 1969 Muscle Parts catalogue..." More from Alex, "The C90X will perform better all around with a mild cam and a 650-700 CFM 4150 Holley."
Original manifolds have the letters 'OECO' stamped on the bottom. The letters are about an 1/8" tall, and are located near the back right at the lip of the flange. Although some claims of the ports being larger, the one I have has port opening dimensions of 1.0" wide X 1.84" tall. Ryan 
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DocVoodoo
Gearhead Posts: 164
From: Plainfield CT USA
Registered: Feb 2003
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posted 06-08-2004 06:56 PM
Ok found the OECO on the bottom right were yea said it would be . It does not look like it but maybe someone wanted a sleeper and machined off the FORD couse thats Blank were it should be other wise it cheaks out. FEw thought I got taken there for a bit.
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fastmerc
Journeyman Posts: 11
From: Santa Clara, CA
Registered: Jun 2004
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posted 06-08-2004 07:22 PM
DocVD
Great find for a reasonable price! Between the two, I'd venture that you'll need an engine dyno to tell the difference between them! Your butt-dyno will probably not reveal a thing.... Sounds like a great combo already!Rag tests of old, tested the 69 351W version of the C90X manifold, along with the stock steel manifold and the 1" spacer, only to write "that someone did their homework when they designed this (factory cast iron) manifold.." Yes, the aluminum version did flow more and produced more HP, but I think the HP figure was like +10-15 difference! Certainly not enough to consider buying a new set of intake gaskets to do the swap!!!! (IMHO.) ....unless of course, you need to feed the ego-monster and HAFTA have something different..... That's why my C90X intake is still sittin' on the shelf. I couldn't see disturbing the gaskets on my engine that is running perfect, only to muck something else up doing an intake swap for so little HP's. Now, if I was putting on a set of aluminum heads, a new cam, etc etc etc, why then YES OF COURSE I would NEED to put this intake on!!!! Then again, you could grind the "EDELBROCK" off of the F4B and keep 'em all guessing "what's under the blue paint...." HAH!!!! Steve
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DocVoodoo
Gearhead Posts: 164
From: Plainfield CT USA
Registered: Feb 2003
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posted 06-08-2004 08:31 PM
YES EGO MONSTER GOOD Gasket Cheap . I Have alot of Rare Parts on the car. Thats part of the fun of it for me. So Far I have an original 8 inch trac lok , a factory 8 grand low profile Tach and the Car is a factory GT Convertible . Some other parts I have scored but are not realy rare are Factory hang on AC unit and power steering set up got those off some parts cars we pulled out of an old junk yard. A/C still has good chrome on it along with all its stickers . The fun is makeing my Car difrent and the HUNT for the Parts to do it. I am trying for the Vintage Mod look . ------------------
1966 GT light blue VERT
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whiteknight289
Gearhead Posts: 1391
From: Wheaton, IL, USA
Registered: Mar 2004
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posted 06-08-2004 08:42 PM
Steve,
I'm a big fan of the 'grind the edelbrock off'!
I was messing around with one of my cobra intakes and I used some RTV mold making compound to make a mold of the word "cobra". I'm considering what material to cast it with, maybe a 5 minute epoxy with aluminum shavings in it? If the word 'cobra' turns out good I can attach it to my F4B intake, LOL.
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