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Old 08-20-2002, 01:38 AM
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Post sbc 327 with 400 rods??

Has anyone had any experience running a 327 with 400 rods? The word is they run like the wind with great bottom end. Thanks D.J.

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Old 08-20-2002, 09:20 AM
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the 400 rods are shorter than regular 350 rods, the rods you want are 6 inches and withe the 327 crank you can actualli fit evel longer rods. but the stock 400 rods are.. well not optimal. so in one respect you are right about running like the wind, just that the wind is the kind you pass, not the one that blows.
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Old 08-20-2002, 09:33 AM
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ok now you got me confused here which isnt hard to do anyway but i thought the 250 rods were shorter than 400 rods
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Old 08-20-2002, 09:34 AM
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oops i meant 350 rods lol
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Old 08-20-2002, 04:20 PM
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Duece is correct, you don't want to use 400 rods. They are shorter than the 350 or 327 rods. Only time they will go like the wind is when they are thrown out of an airplane, and hopefully they will sink to the bottom of some obscure lake without hitting any fishermen or water skiers.
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Old 08-20-2002, 09:45 PM
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Is the 400 rod just .050 shorter than the stock 5.7 rod? I thought it was 5.65. Im running 11 1/2 to 1 compressing z-28 pistons, with 202 69 z-28 heads with 540 lift comp solid cam. Possible juice when the bugs are all out. My mech. is using a 307 block and boring it to a 4.0, 327 crank and 400 eagle rods. He says he has had great luck with these motors. Am I missing anything???? THANKS! D.J.
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Old 08-20-2002, 10:34 PM
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Factory 400 SBC rods are weak at the big end bolts, compare them to standard SBC 5.7" rods and you'll see why. Why would you want a shorter rod anyway? Are you stroking the engine? You should be looking at getting as long a rod as possible to increase piston dwell time at TDC, plus you would have to buy pistons with longer pin height$$$$$? The whole thing sounds fishy to me.

If you want something spectacular than go out and buy some aftermarket 6.0" rods with some shorter pin height forged pistons and then nitride the forged crank and then............

Short rods are a necessary evil if you are stroking it but totally unnecessary and even dumb to do to a stock stroke 350 SBC. Why would you want a weaker rod?

Eagle rods are far different than stock rods and you can get them in lengths up to 6.250", you should have a look <a href="http://www.cdpautomachine.com/ecatalog/eaglerods.html" target="_blank">here</a>

Seems to me that for the same cash you could get the longer rod? Now if you want to stroke the engine then.....
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Old 10-19-2002, 11:03 PM
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As you can see the 400 rods arent very desirable,You Prob. could ues them with your 327 Pistons Using a 350 Crank (not Possitive) I do know the 327 pistons set higher (pin location) in the block with a 350 crank!Good Luck let me know what Happens!
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Old 10-20-2002, 05:33 AM
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[quote]Originally posted by Dave Y.:
<strong>Is the 400 rod just .050 shorter than the stock 5.7 rod? I thought it was 5.65. Im running 11 1/2 to 1 compressing z-28 pistons, with 202 69 z-28 heads with 540 lift comp solid cam. Possible juice when the bugs are all out. My mech. is using a 307 block and boring it to a 4.0, 327 crank and 400 eagle rods. He says he has had great luck with these motors. Am I missing anything???? THANKS! D.J.</strong><hr></blockquote>

A 307 has the same stroke as a 327, it just has a smaller bore. So boring it to 4" would be the only thing necessary to make it a 327.
Using 400 rods would only make the pistons not come to the top of the cylinders. There has to be some misunderstanding here.
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Old 10-20-2002, 05:40 AM
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A 307 doesn't have enough cylinder wall thickness to bore to 4in and be reliable, most will crack under pressure. ony 283 early blocks can take this big bore resize
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Old 10-20-2002, 06:07 AM
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Stock SBC 400 rods (5.565) are .135 thousands shorter than stock 350 rods (5.700) :p

A stock 350 has a stroke of 3.48

A stock 400 has a stroke of 3.75

3.75

- 3.48

= .270 divide by 2 = .135

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Old 10-22-2002, 12:47 PM
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6.25 inch rods are the way to go with a 327 if you can live with the cost of them. you then can use 383 pistons made for a 6 inch rod and get the right compression height. the rod to stroke ratio would be 1.92 to 1 compared to 1.73 to 1 with 400 rods, if your like most guys and have a budget then use regular 5.7 inch rods, they worked great on orignal 327's, if you plan on any power be carful with the 307 crank, it is a cast crank and not as strong as original forged 327 cranks, like BOBCRMAN@aol.com said don't bore out a 307, if that kind of stuff worked, hundreds of people would bore out their 305's and get 350's
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Old 10-22-2002, 02:16 PM
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Dave are you sure you're not meaning a 400 with 327 rods. Someone sells a kit that uses an offset ground crank with small journal 327 rods to increase the stroke on a low budget. I think it comes out to 421 cubic inches depending on bore size.
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