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post #1 of 6 (permalink) Old Sep 10th, 03, 08:50 AM Thread Starter
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Location: Eagle Grove, IA, USA
Posts: 29

For the sake of discussion lets say I would like to build a 352 using the 400 block, and a 327, or 3.25" stroke crank. Is there a downside to using the thicker main bearings to make up the difference in clearance? Also, does anybody know how to figure the correct deck height for this configuration? Just trying to get some info from those that know more than myself!
Thanks, Bakes
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post #2 of 6 (permalink) Old Sep 10th, 03, 09:08 AM
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post #3 of 6 (permalink) Old Sep 10th, 03, 11:15 AM
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I've heard that the thicker bearings are fine, it is when you use the bearing spacer adapters that you get into heat transfer problems.

You should go to and look at their article archives for "the small block chevy should have built." The article outlines exactly what you are doing.

In the article, they use a long rod to achieve a very good rod/stroke ratio which reduces proneness to detonation. Combined with a tight quench, they run a very mild cam at 11:1 compression on 87 octane gas!


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post #4 of 6 (permalink) Old Sep 10th, 03, 11:29 AM
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Had a friend that tried one of those in an early C-Ecno dragster. He didn't have any bearing problems just problems with the factory block hot being able to hold the 14to1 compression. When it ran it ran hard I bet with streetable compression it would work real well.
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post #5 of 6 (permalink) Old Sep 10th, 03, 01:05 PM Thread Starter
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Thanks a lot guys! As always this forum has been more than helpful. I love this site.
Thanks, Bakes
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post #6 of 6 (permalink) Old Sep 10th, 03, 11:03 PM
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In the CHP article, they used custom made pistons on custom machined 6.209" Ford truck rods. Seems like you could do the same thing using off-the-shelf 6.25" rods and off-the-shelf pistons made for a 6"-rod 400 engine.

1.625" (half the stroke)
6.250" (rod length)
1.130" (piston compression height)
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