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Old Dec 17, 2018 | 06:54 PM
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Talking 390 FE Pistons

I got in the wrong area with this post and just found my way here. I got a 390 FE .030 over and want to put some higher compression piston in my 1969 truck engine. I read some where in here that I should use car piston that I would get better compression. I will be running edelbrock aluminum heads and intake. Hope to fine tunnel port heads and intake and top it off with a 780 Holley. I now not to count on great gas mileage
 
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Old Dec 18, 2018 | 03:50 AM
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Car pistons with a compression height of approximately 1.77inches. Flat top or dished depending on the other specs and the desired compression ratio.
 
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Old Dec 18, 2018 | 10:16 AM
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what is your desired compression ratio ? they have calculators online to help .
 
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Old Dec 18, 2018 | 06:56 PM
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Tunnel Port heads will not work on a 390 block. Valves are too big for the 390's bore size.
 
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Old Dec 18, 2018 | 11:14 PM
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Originally Posted by baddad457
Tunnel Port heads will not work on a 390 block. Valves are too big for the 390's bore size.
Missed that Tunnel Port comment.

OP needs:

https://www.penguinrandomhouse.com/b...9780895860705/

or other fine publication:

Amazon Amazon
 
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Old Dec 19, 2018 | 05:13 PM
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yes Great book ! helped me tons when building my 390
 
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Old Dec 20, 2018 | 05:20 PM
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Originally Posted by Tex51
I got in the wrong area with this post and just found my way here. I got a 390 FE .030 over and want to put some higher compression piston in my 1969 truck engine. I read some where in here that I should use car piston that I would get better compression. I will be running edelbrock aluminum heads and intake. Hope to fine tunnel port heads and intake and top it off with a 780 Holley. I now not to count on great gas mileage
You also might pull the heads and verify what pistons you have now before buying new pistons. You never know, the previous builder may have given you what you think you want now. The piston tops will tell you what's what at a glance, but you'll need to measure the distance the piston tops are down from the block's deck at TDC to figure what the comp ratio is now
 
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