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- Newsgroups: alt.hotrod,wiz.hotrod
- Path: sparky!uunet!rsiatl!hotrod
- From: hotrod@dixie.com (The Hotrod List)
- Subject: 351C trivia...
- Message-ID: <61pr80+@dixie.com>
- Date: Wed, 30 Dec 92 04:09:30 GMT
- Organization: Dixie Communications Public Access. The Mouth of the South.
- To: hotrod@dixie.com
- Reply-To: hotrod@dixie.com
- Posted-Date: Tuesday, Dec 29 23:09:23
- X-Sequence: 3128
- X-Gifs-To: met@sunset.cse.nau.edu
- X-Gifs-From: ftp.nau.edu
- Approved: jgd@dixie.com
- Lines: 75
-
-
- -> First, anyone who can't get a 351C to rev to more than 6,000 rpm has
- -> either:
- -> 1) weak valve springs - causing valve float.
- -> 2) A very mild cam.
- -> 3) Any of a host of ignition/timing problems.
-
- So I figured, only I have no idea what the CR, ignition, and cam timing
- specs are for Australian 351Cs, which is what we were talking about.
-
-
- -> Even the 2V heads have intake/exhaust ports that should let the
- -> engine rev to 7,000 (it'll probably peak at 5,000 - 5,500, though, in
- -> terms of max. H.P.)
-
- They're good to 7000, leveling off at 7500. Caveat: you *must* have
- an appropriate intake manifold to actually wind the engine that high.
-
-
- -> "Wimpy" castings - nominal spec. for the cylinder walls is somewhere
- -> around 0.1" or more - hardly "sheetmetal". My Ford references do say
-
- Jack Roush says he's seen US 351C castings as thin as .070, which is
- cutting it pretty damned fine. That's why lots of 351C racers used to
- resort to pouring concrete into the water jackets or running bolts
- through the water jacket to the cylinder wall, or both. Then they all
- switched to the Australian blocks, and then to the SVO blocks. You
- don't see many (any?) passenger-car Cleveland blocks in NASCAR or Pro
- Stock nowadays.
-
-
- -> 302 revving - better make sure you've got the good rods (3/8" rod
- -> bolts, *not* 5/16ths.)
-
- Only the BOSS and 302 T/A had 3/8 rod bolts. The BOSS rods are 5.155
- long, same as a 289, whereas the standard 302 rods are 5.090. You'd
- have to be vewy vewy cawful with assembled height vs. deck height, and
- you'd probably wind up machining the pistons. The T/A rods are 5.312,
- which would require a special piston with the pins raised .222. Of
- course, considering what you'd pay for such items, they'd be happy to
- make them in .020 overbore. <grin>
-
-
- -> 302 wimp motors? Drop by a dragstrip some day. Look at where the
- -> 5.0 L LX's/GT's are running. I've seen times in the mid to high
- -> 12's, with end
-
- That's nice, but pitting a 302W against a 351C is bringing a knife to a
- gunfight. The Cleveland heads are more efficient to begin with; add 49
- more cubes and you have an unbeatable advantage.
-
-
- -> While I'm posting, does anyone know if there's an aftermarket 351C
- -> intake available that can be set up for sequential port injection?
-
- One of the FI companies (my brother has all my catalogs - John, do you
- know who I'm talking about?) sells injector adapters machined from
- aluminum, either press-in or weld-in, for adapting port injection to
- older manifolds. They're about $4 each, as far as I remember. That's
- how I'm planning to set up my B&A Track BOSS intake.
-
-
- [I think it is Haltech. I also think HKS sells 'em. Kinsler has 'bout
- anything you'd ever want. Unfortunately they have the gall to try
- and sell catalogs even at trade shows and EVEN EVEN to the press (GRRRR)
- so I don't have one. I did thumb through one at the PRI show. I don't
- believe these things to be necessary for most installations, BTW. I've
- made a crude step drill that bores a stepped hole. This thing can be used
- to drill an appropriate pocket in a port runner. Mounting late model-type
- O-ring injectors is pretty trivial. Just supply a stepped hole the
- right diameter for the O-ring to seal against and hold it in with the
- fuel rail. I'm going to see about having this step drill made at a
- nearby tool & die shop and offering it to subscribers. JGD]
- ----------
- Posted by: emory!chaos.lrk.ar.us!dave.williams (Dave Williams)
-