360 4 barrel intake

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Sep 3, 2011 | 02:41 PM

#31

Bear 45/70

Post Fiend

Joined: Mar 2004

Posts: 6,056

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From: Union, Washington

Quote:

Originally Posted by DrainBramage

I was under the impression that the 70's emissions compliant FE engines (like my 73 2v 390) were closer to 8:1, 9.5:1 sounds a little generous. Anyone care to set me straight here?

Car motor.

Sep 3, 2011 | 05:58 PM

#32

DrainBramage

Senior User

Joined: Jul 2011

Posts: 215

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From: California

Quote:

Originally Posted by Bear 45/70

Car motor.

Bah, I knew that. I should have thought for another minute before posting. Thanks Bear

Sep 3, 2011 | 07:17 PM

#33

85e150

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Joined: Apr 2004

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The '66 and up 390 2v 9.5 CR car engine was billed as the "Regular Fuel" motor for cheapskates like my dad.

Bear is right about the 4bbl, you can get better mileage if you keep your foot out of it.

Sep 3, 2011 | 09:48 PM

#34

neon tony

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Joined: Jul 2009

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bear in mind, that was 1966, leaded regular. compressiom ratios dropped radically with the intro of unleaded gas. back in the 60's 10:1 was pretty normal.

Sep 3, 2011 | 10:35 PM

#35

85e150

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Joined: Apr 2004

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Yup, know all about it, I was pumping Ethyl in those days....

Not sure if you can get by with 6 degrees timing in an FE with 9.5 and still run regular (87). It should run on 91. OP may not want to feed the high priced spread...

Our '66 "Regular Fuel" 390 2v soldiered on for years on Co-op unleaded swill without too many issues.