309 commpression

Reply Subscribe

Thread Tools

Search this Thread

Jul 15, 2008 | 04:42 PM

gearhed1971

Thread Starter

Senior User

Joined: Jan 2006

Posts: 434

Likes: 0

From: Little Falls,New York

309 commpression

What should my 390 have for compression?Chilton's left that page out.I'm running at right around 100 per cylinder

Jul 15, 2008 | 04:55 PM

FFR428

Needsmorecoffee.

Joined: Oct 2004

Posts: 3,624

Likes: 2

From: CT

Depending on the exact year the average spec is 180.

Jul 15, 2008 | 07:59 PM

Hypoid

Cargo Master

Joined: Apr 2004

Posts: 2,574

Likes: 4

From: Golden, CO

I looked in my Chilton's Truck and Van: 140 psi for all FE/FT truck listings from 1970 to 1976.

I think the higher pressures are normal for car engines.

How much difference between cylinders was there?

Jul 15, 2008 | 09:03 PM

gearhed1971

Thread Starter

Senior User

Joined: Jan 2006

Posts: 434

Likes: 0

From: Little Falls,New York

all pretty consistenet at around 100 lbs.,but I used a gauge with a rubber tip and it probably didn't seal as good as it should have.

Jul 16, 2008 | 04:53 AM

FFR428

Needsmorecoffee.

Joined: Oct 2004

Posts: 3,624

Likes: 2

From: CT

Quote:

Originally Posted by Hypoid

I think your right my book was passenger car specs.

Reply Subscribe

Reply Share

First
Prev
1 / 1
Next
Last

Forum Jump