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Old 01-06-2013, 04:09 PM
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Been along time need help

Well let me first start off by saying I haven't built a motor in about 15 years or so. That being said I'm kinda rusty and all of your help would be greatly appreciated . First lets start with a bottom end question. I have a 350 block bored .030 and I was thinking of building a stroker. Pistons and rods have already been upgraded. If I buy a internally balanced crank can I use factory balancer and flex plate . Thanks again for any input.

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Old 01-06-2013, 04:20 PM
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Quote:
Originally Posted by Jmszip610 View Post
Well let me first start off by saying I haven't built a motor in about 15 years or so. That being said I'm kinda rusty and all of your help would be greatly appreciated . First lets start with a bottom end question. I have a 350 block bored .030 and I was thinking of building a stroker. Pistons and rods have already been upgraded. If I buy a internally balanced crank can I use factory balancer and flex plate . Thanks again for any input.
For 383 stroker the pistons and crank need to be changed they are shorter. This allows for the great stroke.

Eagle SBC Stroker 350 383 Balanced Rotating Assembly | eBay

Good news is some of the stuff is much cheaper than it was 15 years ago. Some is alot more.

Last edited by 68NovaSS; 01-06-2013 at 05:25 PM. Reason: Spelling typo
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Old 01-06-2013, 07:13 PM
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the balancer/flywheel/flex plate will work internally balanced 366/383/388s the pistons have to be matched to the new stroke.If you bought 355 pistons then you can build a 355 only
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Old 01-06-2013, 07:22 PM
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Originally Posted by vinniekq2 View Post
the balancer/flywheel/flex plate will work internally balanced 366/383/388s the pistons have to be matched to the new stroke.If you bought 355 pistons then you can build a 355 only
Vinnie, can you build a 327 if you use 6 inch rods? (.030 over 331)
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Old 01-06-2013, 07:39 PM
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Of course you can use 6 inch rods in a 331. you need the correct pistons. Do you have a reason to upgrade to 6 inch rods?
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Old 01-07-2013, 12:03 AM
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.. You would need about 5.835" - 5.850" custom rods to re-use 350 pistons with a 327 crank... depending on exact deck height of block and compression height of pistons...

.. Prolly cheaper to change to 327 pistons and use standard rods...
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Old 01-07-2013, 12:54 AM
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Quote:
Originally Posted by Jmszip610 View Post
Well let me first start off by saying I haven't built a motor in about 15 years or so. That being said I'm kinda rusty and all of your help would be greatly appreciated . First lets start with a bottom end question. I have a 350 block bored .030 and I was thinking of building a stroker. Pistons and rods have already been upgraded. If I buy a internally balanced crank can I use factory balancer and flex plate . Thanks again for any input.
First, welcome. Building an engine is much the same as riding a bike- you'll catch on quickly once you get into it.

To use 1.56" compression height (CH) 350 pistons (stock sbc 350 CH in other words) to build a 383 stroker, you'd have to use the stock sbc 400 rods that are 5.565" long. This isn't usually done; most all "kits" use a 5.7" rod, some also use a 6" rod, and these require pistons w/their own CH.

You can build an internally balanced 383 stroker, but it's usually more expensive. Of course the cost of a different balancer and flexplate/flywheel has to be considered as well. But in many cases they need to be replaced anyway, due to age/wear.

While the 383 stroker gets all the buzz nowadays, there's not a thing wrong w/building a 350 SBC for most applications.

More here.
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Old 01-07-2013, 10:53 AM
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Of course you can use 6 inch rods in a 331. you need the correct pistons. Do you have a reason to upgrade to 6 inch rods?
Raceboat motor, more RPM
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Old 01-07-2013, 10:56 AM
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more RPM is a little vague? High RPM is expensive.Over 7,500 is very expensive.Boats are hard on engines
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