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Author Topic:   Compression?
Hell_Fish
Gearhead

Posts: 672
From: Austin, TX.
Registered: May 2002

posted 11-22-2002 09:26 AM     Click Here to See the Profile for Hell_Fish   Click Here to Email Hell_Fish     Edit/Delete Message   Reply w/Quote
What was the stock compression of a 69 302 2bbl? How much is it raised with a pair of C9 351W heads(69)?

Thanks,
Dustin C.

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68DARKHORSE
Gearhead

Posts: 378
From: Austin, Tx
Registered: Aug 2002

posted 11-22-2002 09:59 AM     Click Here to See the Profile for 68DARKHORSE   Click Here to Email 68DARKHORSE     Edit/Delete Message   Reply w/Quote
Dustin, I have a 351W you could put under those heads.

Your engine came with 58cc heads. The W's are 60cc.

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68DARKHORSE
Gearhead

Posts: 378
From: Austin, Tx
Registered: Aug 2002

posted 11-22-2002 10:07 AM     Click Here to See the Profile for 68DARKHORSE   Click Here to Email 68DARKHORSE     Edit/Delete Message   Reply w/Quote
Are they C9OE's?

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69 Sportsroof
Gearhead

Posts: 1214
From: Valley, Alabama, USA
Registered: Mar 2002

posted 11-22-2002 10:16 AM     Click Here to See the Profile for 69 Sportsroof   Click Here to Email 69 Sportsroof     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by 68DARKHORSE:
Your engine came with 58cc heads. The W's are 60cc.

4 bbl heads have 58cc combustion chambers. 2 bbl heads have 63cc cumbustion chambers.

http://www.mustangii.org/tech/heads.shtml

More info...
http://www.thecarsource.com/fords/engines/302engine.html

[This message has been edited by 69 Sportsroof (edited 11-22-2002).]

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Hell_Fish
Gearhead

Posts: 672
From: Austin, TX.
Registered: May 2002

posted 11-22-2002 10:20 AM     Click Here to See the Profile for Hell_Fish   Click Here to Email Hell_Fish     Edit/Delete Message   Reply w/Quote
So it should be around 3cc better, right?Alton, you got a spare 351W? You stopping by today?

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Hell_Fish
Gearhead

Posts: 672
From: Austin, TX.
Registered: May 2002

posted 11-22-2002 10:23 AM     Click Here to See the Profile for Hell_Fish   Click Here to Email Hell_Fish     Edit/Delete Message   Reply w/Quote
Thanks for the sites 69 Sportsroof. Its good to know the 2bbl 302 wasn't that bad in 69.

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68DARKHORSE
Gearhead

Posts: 378
From: Austin, Tx
Registered: Aug 2002

posted 11-22-2002 10:30 AM     Click Here to See the Profile for 68DARKHORSE   Click Here to Email 68DARKHORSE     Edit/Delete Message   Reply w/Quote
On my way.

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SteveLaRiviere
Administrator

Posts: 33988
From: Saco, Maine
Registered: May 99

posted 11-22-2002 10:48 AM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Hell_Fish:
What was the stock compression of a 69 302 2bbl?

9.5:1

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[email protected]
Gearhead

Posts: 440
From: Lakewood, CO, USA
Registered: Jun 2001

posted 11-22-2002 11:22 AM     Click Here to See the Profile for JCQuinn@work   Click Here to Email JCQuinn@work     Edit/Delete Message   Reply w/Quote
One thing to keep in mind is that heads from the factory seldom match the published spec. When I prepared heads for stock or SS engines I always had to mill the head to get to the published CC value. If you want to know your static compression ratio you need to actually measure the CCs in your head.

John

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Moneymaker
Administrator

Posts: 19751
From: Lyons, IL, USA
Registered: May 99

posted 11-22-2002 11:33 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Mainstream production FoMoCo heads are rarely even close to spec!
John is 100% correct.

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Alex Denysenko
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Quote #1: "I never met a magazine mechanic I liked."
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Hell_Fish
Gearhead

Posts: 672
From: Austin, TX.
Registered: May 2002

posted 11-22-2002 12:16 PM     Click Here to See the Profile for Hell_Fish   Click Here to Email Hell_Fish     Edit/Delete Message   Reply w/Quote
Yeah, I know. I was just wanting a rough idea of where the compression should be at on my 302 with 351W heads. Thanks.

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68DARKHORSE
Gearhead

Posts: 378
From: Austin, Tx
Registered: Aug 2002

posted 11-22-2002 12:49 PM     Click Here to See the Profile for 68DARKHORSE   Click Here to Email 68DARKHORSE     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by 69 Sportsroof:
4 bbl heads have 58cc combustion chambers. 2 bbl heads have 63cc cumbustion chambers.


What's the engine code on a 1969 302 4V(non-Boss)?

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68DARKHORSE
Gearhead

Posts: 378
From: Austin, Tx
Registered: Aug 2002

posted 11-22-2002 12:56 PM     Click Here to See the Profile for 68DARKHORSE   Click Here to Email 68DARKHORSE     Edit/Delete Message   Reply w/Quote
The chart on http://www.mustangii.org/tech/heads.shtml does not indicate what is 2V and 4V. It also shows 53.5cc for 68-70. The 53.5cc 302 4V head is for '68 only.

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68DARKHORSE
Gearhead

Posts: 378
From: Austin, Tx
Registered: Aug 2002

posted 11-22-2002 01:01 PM     Click Here to See the Profile for 68DARKHORSE   Click Here to Email 68DARKHORSE     Edit/Delete Message   Reply w/Quote
Dustin, the car looks great. Keep up the good work.

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69 Sportsroof
Gearhead

Posts: 1214
From: Valley, Alabama, USA
Registered: Mar 2002

posted 11-22-2002 01:14 PM     Click Here to See the Profile for 69 Sportsroof   Click Here to Email 69 Sportsroof     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by 68DARKHORSE:
What's the engine code on a 1969 302 4V(non-Boss)?

There aint one, at least not one that I can find. For a 4bbl on a 69 302 you had to go with a Boss which is G. However, in 68 you could get a 4v 302 which had a code of J.

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69 Sportsroof
Gearhead

Posts: 1214
From: Valley, Alabama, USA
Registered: Mar 2002

posted 11-22-2002 01:24 PM     Click Here to See the Profile for 69 Sportsroof   Click Here to Email 69 Sportsroof     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Hell_Fish:
Thanks for the sites 69 Sportsroof. Its good to know the 2bbl 302 wasn't that bad in 69.


Tell me about it. My Haynes book says I have 8.41:1 or some dogged out number like that. I think it runs pretty good even with 2.79's in the rear...

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