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Old 07-29-2007, 04:16 PM
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Nascar rods

Why can't the narrow 0.904" Nascar rods be used on a standard SBC crank if you weld up the radius and turn back down to 0.904" X 2 + 0.022' side to side clearance?

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Old 07-29-2007, 05:43 PM
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You can do anything you want if you have the proper equipment. I might question welding on a rod though and the resulting effect it might have on the metallurgical structure of the metal.

I used to put together home-made strokers like that. I'd find a rod that had a pin end that was close enough to either bore or bush for the pin I wanted to use and had the big end wide enough to cut to the proper width for the rod journal I wanted to use it on. I've never welded on a rod though.
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Old 07-29-2007, 06:05 PM
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I met to weld the crank "narrower" to accomodate the narrower rods, Doable? Or must a pistone-centered approach be the only way?
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Old 07-29-2007, 09:34 PM
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why not buy a used nascar crank too?
Shane
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Old 07-29-2007, 10:14 PM
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Most of the rods, that are still useable, for that type of engine are made with Honda sized big ends. You'd have to buy a crank with 1.88" rod journals to use them.

If your rods are old enough to have been sized for 2.0 or 2.1" journals I'd be afraid of them being a bit too far gone for any serious duty.



Larry
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Old 07-29-2007, 10:23 PM
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Quote:
Originally Posted by jcpts
I met to weld the crank "narrower" to accomodate the narrower rods, Doable? Or must a pistone-centered approach be the only way?
Sorry.
Yeah, we have welded on cranks for years. Welded up the rod journals and offset ground them for strokers, so I don't see why you couldn't weld some more fillet into the journal and machine it for a narrower rod.


This kind of stuff gets me thinking. Now, I'm wonderin' if a guy could find a main thrust bearing from some other motor with 2.100 mains or somewheres thereabout that might be adapted onto the big end of the rod to take up the slack. Hey, don't throw rocks at me, I'm just thinkin'.

I'm all about makin' stuff work that was never intended to work together. I remember 30 years ago, I was wantin' a big inch Mopar for some reason, can't remember now. Used a 400 Mopar block bored to fit a standard 429 Ford piston, BBC rod and Mopar 440 crank offset ground for more stroke and to fit the BBC rod. Bored the pin end of the rod for the Ford pin. Made a 470 inch motor. W-T-F.

Last edited by techinspector1; 07-29-2007 at 10:29 PM.
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Old 07-29-2007, 11:23 PM
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http://musclemotorsports.com/engine-...ssemblies.html

bet that mopar was a beast
Shane
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Old 07-29-2007, 11:32 PM
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Quote:
Originally Posted by Chevrolet4x4s
I couldn't remember, so I asked my wife. She seems to remember I built the short block for a drag racer friend of a friend and we never heard from him again.

Ain't it just like an old fart, I can remember the components I used in a motor 30 years ago, but I have no idea what I had for dinner last night.
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Old 07-30-2007, 02:26 AM
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She seems to remember I built the short block for a drag racer friend of a friend and we never heard from him again.
Isn`t this the way it always goes tech? Just list it as "the one that got away"
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Old 07-30-2007, 02:45 AM
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Quote:
Originally Posted by DoubleVision
She seems to remember I built the short block for a drag racer friend of a friend and we never heard from him again.
Isn`t this the way it always goes tech? Just list it as "the one that got away"
Ain't it the truth...
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Old 07-30-2007, 08:36 AM
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No need to weld. The rods you have are held in alignment on the crank by the pistons. Contact JE about custom pistons for your application.
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