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Old 11-25-2001, 07:15 PM   #1
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351w Long Rod

the 351w Long Rod
has anyone heard of this type of build?
is it a dependable option for a street/strip car?
What type of heads are recommended?
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Old 11-25-2001, 07:25 PM   #2
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why would you want to do this? 351's have great rod ratios, strong stock rods, and make good power with their stock rod length. Does it really make sense to spend more many than needed just to have a longer rod, better ratio, and longer piston dwell? I personally don't think so. CHP, Keith Craft and others all carry the long rod kits that use a 6+" rod.
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Old 11-25-2001, 07:28 PM   #3
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Mat88GT
Your from Iowa...
I am from Dubuque, I am up here in Michigan for law School...
Hows the weather down there...?
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Old 11-25-2001, 07:33 PM   #4
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i totally encourage you to throw a longer rod in that thing, while your at it tho, for the same amount of money your going to spend, throw a 408 kit at it.

if your going to long rod it, and get a custom piston and rod, why not just get a stroker with OTS pistons? about the same cost, and you gain 50" over a .030 351w.....i bet youll feel more power that way
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Old 11-25-2001, 08:29 PM   #5
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The long rod 351w uses the rods out of a 351m/400 which are 6.580 in length which gives a 1.88 rod ratio. The pistons have a 1.15 compression height. So just buy a good piston for a 331(must be for a 5.40 length rod). All this and you got a long rod 351w which IS cheaper than a stroker with more Tq and HP than a regular 351w.
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Old 11-26-2001, 02:50 AM   #6
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Long Rod Specs

Here's the definitive long rod 351 article. Note that it uses a comparatively small cam but still does quite well, even with full exhaust and intake plumbing. AND it uses 87 octane and was emissions legal in CA a couple yrs ago when built. Check a comparable sb Chevy build on www.airflowresearch.com in their archives that did equally well. Should do good for a mid-range hop for good street drivebility and reasonable mileage. Probably not compatible with radical cam & real major mods.

http://63.251.78.219/351_ford_should_have_made.htm
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Old 11-26-2001, 06:16 AM   #7
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The long rod 351-W is actually a decent performer, and it is definately a budget build up as well. 400 HP on 87 octane is pretty decent as far as i am concerned.
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Old 11-26-2001, 03:25 PM   #8
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HEADS ON A Long Rod 351w

What type of heads are recommended for this application...budgetly speaking...
what size carb?
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Old 11-26-2001, 05:54 PM   #9
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I remember these articles that were originally published in Hot Rod and then recycled in 5.0 magazine. Aren't magazine mergers great, can't wait to see the affect on MM&FF and 5.0 magazines.

Anyhow, I was all excited when I originally read these articles and wanted to build one. But, it's not a one-size fits all setup. From my reading, it seems to work best above 6500-7000 rpm or on engines with limited cylinder head flow. On a typical street/strip or street motor, I think that your money would be better spent on heads, a custom cam and / or a stroker crank. In the limited rpm of a street motor it doesn't seem to be worth the effort. Another draw back is the smaller compression height pistons. If you look at the hundreds of factory motors produced over the years, the one common specification is a relatively tall compression height piston. This creates a more stable piston in the bore and seems to enhance ring life & longevity.

Spend your time & money creating a well-matched combination for maximum results for the $$$.

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Old 11-26-2001, 08:21 PM   #10
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Talking

After reading the article I got to say I'm interested.

How would I go after doing that?

Does anybody have the machining specifications for the crank and rods? How much are those pistons?

Does anybody sell a kit for that?

Did anyone on Corral perform this buildup?
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Old 11-26-2001, 08:57 PM   #11
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are those dyno numbers measured at the crank or the wheels?
400 hp @ 5100 peak, with Twisted Wedge R's and 11:1 compression?

Man, don't they need a larger camshaft in that thing? TW R's
and making peak power at 5,100 rpm? That seems really under-built.

-Jim
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Old 11-27-2001, 12:28 AM   #12
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Question

Quote:
Originally posted by Jimmc
are those dyno numbers measured at the crank or the wheels?
400 hp @ 5100 peak, with Twisted Wedge R's and 11:1 compression?

Man, don't they need a larger camshaft in that thing? TW R's
and making peak power at 5,100 rpm? That seems really under-built.

-Jim
Nice numbers Jim.

What's your combo.

I'm building a 351W right now

Adam
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Old 11-27-2001, 12:41 AM   #13
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if i invested all that cash into a set of r heads and built a 351w, i would be sadly dissapointed in a 5100 rpm peak power of only a little over 400..........seems like it needs an r intake to go with it, and maybe a custom solid roller!

fwiw, thats not at all a low buck engine, the first one of these i saw used worl heads and cheap hyper pistons...it made 400hp on 87 as well, with iron heads.

hell, extrude honing is 5 billz, the pistons are over 6, the heads, 2k, the rest of the shortblock isnt much over anything else...
they make it sound cheap, 3800? yeah, but what about everything else? intake plus extruding, the retro roller kit, the rebuild when you break a piston like these meat heads did, when they had already checked it all out? and their professionals?
ill build me own thanks!

stroker kit for 351 to 408, about 1500. machine and assemble, your prolly lookin at the same cost for a shortblock as they are, and 50 cibes is better than a longer rod anyday.
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Old 11-27-2001, 12:53 AM   #14
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Well I like the 408 but cost wise its hard to beat the 393. Ok weigh the cost is 15ci worth another 400 bux, Personally I think not. Fact is other than building what you have a 393 is the cheapest stroker around. I still like the long rod 351w though good fuel milage hp and tq all rolled up in one.

Lee
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Old 11-27-2001, 12:57 AM   #15
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Lightbulb

The main reason to put a longer rod in the 351 is to get rid of that Buick GN, Chrylser 440, Oldsmobile, Heavier than TRW wannabee piston that comes in a 351W!

It's like pitching 8 anchors out of the engine.
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Old 11-27-2001, 01:04 AM   #16
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ROFLMFAO, Aint that the Truth.
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Old 03-18-2002, 07:53 PM   #17
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I have begun the transformation!
Speed-o-motive forged kit.
What heads do you recommend?
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