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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!gatech!udel!wupost!spool.mu.edu!umn.edu!lynx!triton.unm.edu!markm
- From: markm@triton.unm.edu ()
- Subject: Selection of High Performance Carb
- Message-ID: <d1mr00@lynx.unm.edu>
- Date: Mon, 28 Dec 92 03:37:30 GMT
- Organization: University of New Mexico, Albuquerque
- Summary: EEnie Meenie Meini Moe, Pick a carb that'll really go!
- Lines: 129
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- Hello there sports fans!
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- Time for a carbureator quiz. It's time that I select
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- the perfect carb for my car, and I have at my disposal
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- several candidates that I am considering for the
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- purpose. I own all of them, and for me it's simply a
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- matter of just rebuilding the carb, and selecting the
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- intake manifold.
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- I have a holly 4160, a rochester quadrajet, the stock
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- motocraft 4bbl, and my current favorite, a carter
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- thermoquad which I just cannibalized from a 1976
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- Plymouth Gran Fury state police car.
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- My car is a 5000+ pound 1970 Mercury Marauder with a
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- 429 CJ engine, 383:1 rear end, C6 Trans with a shift
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- kit installed, and lots of looks and style. My desire
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- is to make this thing a compromise: excellent mileage
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- for a beast of its size, while simultaneously able to
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- lay 100ft patches of rubber and do the 1/4 mile in
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- under 14 sec.
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- Just to let you know, I have been considering the
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- offenhauser 360 as an intake, and the cam/lifter set
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- has yet to be chosen; I am however leaning towards a
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- cam that is 2-3 steps above the OEM. Compression is
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- 11.00:1, and the ignition is all electronic (mallory)
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- with a peak-limiter, although I doubt seriously that
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- I'll ever push it to that extreme.
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- The heads are currently being ported and polished
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- (although there isn't alot more that can be removed
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- from the CJ heads from what I am told), and a local
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- company is putting together the
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- dual exhaust package with 2.00 inch (I think he said)
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- pipe through a pair of turbo muffs.
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- All in all, its a pretty respectable package, needing
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- lots of final assembly. So, what carb will be best,
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- huh guys?
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- I lean toward the Carter Thermoquad for one reason.
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- The primaries are small - about 1" diameter - (same
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- size as the stock motocraft and the rochester), while
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- the secondaries are in excess of 2.00" diameter - have
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- yet to measure exact - (twice the size off all the
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- carbs mentioned)! I figure the small primaries will
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- give me the economy I am looking for, while the large
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- secondary bores will propel this detroit dinosaur at
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- warp 9!
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- What do you guys think?
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- Also, does anyone know of an aftermarket manufacturer
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- of spread-bore intakes for the 429 CJ? I am not sure
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- that the offenhauser 360 I have been lusting after
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- comes in a spreadbore configuration.
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- Thanks for the E-Mail!
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- MARK F. MITCHAM
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- MARKM@TRITON.UNM.EDU
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