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Author
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Topic: Firing order question
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65whitestang
Gearhead Posts: 111
From: Eastern,CT
Registered: Jun 2006
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posted 09-26-2006 01:45 PM
 
I have a 302 with the casting numbers pointing to it being a 85 vintage block.
I noticed the firing order is different
from the one cast into my 289 intake that
I plan on dropping off to the machine shop
soon. I don't know what cam is in the 302
as it came with the car when I bought it.
I have a receipt to back up the rebuild,but
it does not have what cam they used. I tried
to find out from the shop if they have any records and everything they had burned up
in a fire a couple years ago.
Does the cam control what the firing order is or is the 85' 302 order not the same as the 65' 289? ------------------
Bill M
Mystic,CT
65 Convertible
9"rear,5 speed conversion,currently
powered by a 302
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senzstang
Gearhead Posts: 530
From: perry, oh, usa
Registered: May 2002
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posted 09-26-2006 02:11 PM
302 firing order should be the same as a 289.If the cam has been changed to a 351 cam it will have a different order. 1 3 7 2 5 6 4 8 for the 351 instead of 1 5 4 2 6 37 8 for the 289. My 289 has a Ford Motorsport 351 cam in it so it has the 1 3 7 2 5 6 4 8 order. Check the wires out against those orders and you will find out. Phil
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65whitestang
Gearhead Posts: 111
From: Eastern,CT
Registered: Jun 2006
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posted 09-26-2006 02:16 PM
What direction does the distributer turn?
Clockwise or CCW?------------------
Bill M
Mystic,CT
65 Convertible
9"rear,5 speed conversion,currently
powered by a 302
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68 Coop
Gearhead Posts: 5847
From: Mesquite, NV. 89027
Registered: Oct 2004
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posted 09-26-2006 02:53 PM
ccw
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Rory McNeil
Gearhead Posts: 1889
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 09-26-2006 02:54 PM
Ford V8 distributors rotate counterclockwise. As for firing orders, starting in 1982, the 302 "H.O." Mustang GT engine used a 351W "marine" camshaft, and the 351`s firing order. All the following 5.0 H.O. engines retained the 351 firing order, while the low performance 302`s used the standard 15426378 firing order.------------------
78 Fairmont 428 4 speed 10.20@131.5mph 1.32 60 foot
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA M/Stock 302 5speed. 12.36@106.88mph 1.63 60 foot
59 Meteor (Canadian Ford) 2 dr sedan 332, auto
74 F350 ramp truck 390 4spd
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indyphil
Gearhead Posts: 3394
From: Senoia, G.A. USA
Registered: Jul 2002
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posted 09-26-2006 03:00 PM
To answer your question tho
the cam DOES decide the firing order
If you dont know what vintage cam you have then you can simply turn the engine over (CW from the front of the crank) with a wrench and watch which valves operate. When you get Valve #1 to open, start there and follow the order - that will be your firing order.make sure you know your cylinder numbers - I often get confused.
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65whitestang
Gearhead Posts: 111
From: Eastern,CT
Registered: Jun 2006
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posted 09-27-2006 08:42 AM
First thanks for all the wisdom. It turns out that I have the 351 firing order. Is their anyway to tell the difference between
a HO block and regular 302 block or are the
castings the same?------------------
Bill M
Mystic,CT
65 Convertible
9"rear,5 speed conversion,currently
powered by a 302
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Tom G
Gearhead Posts: 1069
From: Bethlehem, Pa USA
Registered: Nov 2001
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posted 09-28-2006 09:00 PM
quote:
Originally posted by 65whitestang:
First thanks for all the wisdom. It turns out that I have the 351 firing order. Is their anyway to tell the difference between
a HO block and regular 302 block or are the
castings the same?
85 HO block would be a roller cam block but I beleive all the 85 and up blocks have provisions for roller cams. There is no differeence between block castings though. Does your motor have roller lifters?
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67 Mustang F/B 302 GT-40X FMS engine RPM Air Gap 650 Holley DP Crane 1.7 roller rockers, Performer Nitrous, ceramic headers WC T5, cable clutch MagnaFlow SS kit W/X Pipe 3.89 9". SSBC 4 piston frdisc Clearwater Aqua, Vintage 40 series 16X8 215 front 255/50 drag radials 308 RWHP@5800rpm 300 tq NA 385rwhp 380 w 75 shot 13.11 @111mph 88 GT (FiveOfastback's ride)
347 Twisted wedge custom HYD roller 565 lift 282 duration Street Heat, BBK headers X pipe
G Force 353 RWHP 393 RWTQ Red/Silver Newest Project!
69 Boss 302 Acapulco Blue
65k original miles Matching number motor and trans
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