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Old 09-28-2005, 11:48 AM
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5.565 rods & 350 piston question

a buddie of mine has a set of sbc 400 5.565 inch connecting rods with .030 over Ohio brand 4 valve relief dish top cast pistons. The rods are brand new from Speedway Motors and have 190,000 psi rod bolts the pistons are a .030 over stock type piston for 350 Chevy . Can This combination can be used to make a 383 stroker by using a stock 400 sbc crankshaft with main journal ground to fit small block Chevy 350 main jornal size. This Part True ? This combo doesn't require all the block and cam clearancing that is common with other 383 stroker combos.


$140 fair ???


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Old 09-28-2005, 11:58 AM
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383 pistons with 5.56" rods are very heavy. DOn't use them in a serious performance application. Good daily driver though.
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Old 09-28-2005, 12:04 PM
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would 375 or 400 hp be pushig it to far ? 5400RPM 5800 RPM too much ?





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Old 09-28-2005, 12:28 PM
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Quote:
Originally Posted by Mustangsaly
would 375 or 400 hp be pushig it to far ? 5400RPM 5800 RPM too much ?

Thanks
They'll work just fine for a street motor, I've done it before with cheapo cast pistons and I'm doin' it again but I'll be using Hypereutectics or forged pistons this time. The cheapo one only survived 3 years of 6,000 RPM + and a 100HP Nitrous set up in a heavy car. That was after I beat it for a year and then sold it to a friend. He ABUSED it for 2 years and then sold the car, it lasted another year or so before we heard it finally melted the pistons.
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Old 09-28-2005, 12:57 PM
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if you were building a SBC 383cid stroker would you use the 5.565 length rods ?

i have time b4 this engine will go together, so i'm in no real hurry. what route would you go ? should I wait and go Hypereutectics or forged pistons ?

Mustangsaly
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Old 09-28-2005, 02:00 PM
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if you can get the whole thing for 140.. then go for it, next time you break something and change pistons.. get a set of 5.7 or 6 inch rods and corresponding pistons... but if upping your displacement 23 ci is what rocks your boat, 140 is a bargain..
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Old 09-28-2005, 02:26 PM
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is This Part True ? This combo 5.565 rods doesn't require all the block and cam clearancing that is common with other 383 stroker combos ?




i don't want to go the wrong direction, just trying to save a buck. not when theres this kinda good advice to be had.

Thanks

Mustangsaly
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Old 09-28-2005, 02:36 PM
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Quote:
Originally Posted by Mustangsaly
is This Part True ? This combo 5.565 rods doesn't require all the block and cam clearancing that is common with other 383 stroker combos ?




i don't want to go the wrong direction, just trying to save a buck. not when theres this kinda good advice to be had.

Thanks

Mustangsaly

*******
I doubt it.
Cast pistons will work, right up to the time one turns a rod loose to cut your engine in half.
Only your psychic knows when.

But you saved a buck or two.
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Old 09-28-2005, 02:40 PM
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xntrik,

thanks

you know a good psychic ?




are the 5.565 rods a good idea ?




Mustangsaly
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Old 09-28-2005, 03:16 PM
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there actually is more than one way to build a 383 and yes that is one of them.whether or not you want to use those particular piece's or not is up to you.it doesn't always have to be a 7000 rpm screemer,it might very well be for a tow truck.
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Old 09-28-2005, 04:03 PM
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this will be in a 63 nova. with a 350th auto and a ford 9" with 373s or 411s i want a solid street motor, with some 1/4mi runs, more weekend cruising than a daily driver. something solid i can turn 5400 to 5800 RPM and the truth is, the 383 stroker will be Beat. this SBC will be a Fun Ride not a pampered baby.








Mustangsaly
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Old 09-28-2005, 04:25 PM
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Quote:
Originally Posted by Mustangsaly
is This Part True ? This combo 5.565 rods doesn't require all the block and cam clearancing that is common with other 383 stroker combos ?
Using the 5.565 rods and 350 pistons I did NOT have any clearance issues on mine, I used a 1974 Z/28 4 bolt main block, a 1970 400 crank and rods with ARP rod bolts and Badger flat top cast pistons. The 400 rods are not weak but they put more side load on the piston compared to the 5.7" rods and can make the skirts and cylinders wear a little faster. For a mild street motor with 9 to 1 or so compression, a redline of 5500 and no nitrous cast pistons are fine. Had my buddy not put nitrous on my old one and repeatedly revved it to 62-6300 every time he drove it it would have probably lasted forever. I am collecting pieces for another one and I am using the 5.565 rods and if they made a 22cc D-cup cast piston I wouldn't hesitate to use one because mine will never see the high side of 5400 and will spend 95% of it's time under 2 Grand. They don't make 22cc D-cup cast pistons though so I will use Hypereutectics or forged whichever I can find the best deal on. I priced having a 400 crank machined locally and ended up buying a brand new CAT cast 383 crank as it was about $40 cheaper and I already had the 400 crank. With the new cranks that are available there is no good reason to mess with an old 400 crank when building a 383.

Keep in mind I am building a stump puller street motor with a relatively mild cam and about 9.0 to 1 compression. I will be using 64cc aluminum heads so I can run whatever gas is available, this is going to be a road car and will see a lot of long trips so it has to be fairly forgiving of fuel quality.
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Old 09-28-2005, 04:29 PM
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Quote:
Originally Posted by Mustangsaly
this will be in a 63 nova. with a 350th auto and a ford 9" with 373s or 411s i want a solid street motor, with some 1/4mi runs, more weekend cruising than a daily driver. something solid i can turn 5400 to 5800 RPM and the truth is, the 383 stroker will be Beat. this SBC will be a Fun Ride not a pampered baby.

Mustangsaly
Ah ha....... you must have posted this while I was banging away on my other reply. Build a 350, put the $140 for your buddy's parts and the money you'd spend on the 383 crank toward a good set of pistons and a set of ARP rod bolts for the 350.
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Old 09-28-2005, 05:54 PM
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Hippie,

would you run the 5.565 rods in the 350 with a set of Hypereutectics or forged pistons ? or run 5.7 or 6.0 rods in the 350 ?

if i don't ask i won't know

Thanks

Mustangsaly
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Old 09-28-2005, 06:28 PM
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I don't bother with stock rods unless I already have them and it's not going to rev over 6K very much.

At $85 for ARP Waveloc Pro rod bolt plus the cost of re-sizing the rods after the bolts are installed, it just makes more sense to pony up $220 for a set of 4340 rods that haven't seen any cyclical stress.

If you do intend to build an engine capable of living at 7K you DO NOT WANT TO SKIMP ON THE BOTTOM END AT ALL. You will end up spending twice as much time and money to replace the grenade later on.

Larry
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