302 non-HO, 302 HO and 351 windsor firing order differences? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 11 Old 02-22-2005, 11:44 PM Thread Starter
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302 non-HO, 302 HO and 351 windsor firing order differences?

i need to know what they are please! swapping a non-HO 92 302 for a 94 351 in an F 150. its a complete motor with rails, dizzy, intake, etc.. do i need to swap cams? havd one friend tell me just to swap the firing order. so im here, needing some help from someone knowledgeable on the subject thank you VERY much.

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post #2 of 11 Old 02-23-2005, 01:18 AM
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The cam in the motor determines the firing order so swapping firing order with the same cam is not gonna do anything but stop it from running. Both are EFI? If both are EFI then you may have to swap your computer.

Good luck on your swap over.


Last edited by yelsvt03cobra; 02-23-2005 at 08:35 AM.
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post #3 of 11 Old 02-23-2005, 01:28 AM
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even if you dont know what the firing order is,

it can be figured out.

number one is allways first.
find it..
make the dampener t.d.c. mark align up with the pointer.
then
just rotate crank with a wrench one quarter of a turn,
whatever the cylinder is that both valves are closed,
it the next cylindewr that is supposed to fire....
it is probably #5,
or
#3

this is the answer....
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post #4 of 11 Old 02-23-2005, 02:48 AM
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H.O. 302 - 1-3-7-2-6-5-4-8

non-H.O. 302 & 351W - 1-5-4-2-6-3-7-8

1983 GT;410 Windsor;AFR225;Comp Cams HR "Cheater" cam (.546,236/240,109);Vic Jr intake;Holley 750HP vac sec;MSD ign./dist;Holley black fp;AJE K-mem;Kooks 1-7/8" stainless headers;Dr Gas 3.5"-2.5" x-pipe;Magnaflow 2.5" muffs/pipes;Spec 10.5" alum flywheel/Stage 3 clutch;Tremec T56 Viper 6-spd; alum driveshaft; 9" rear;4:11 gears;Auburn Pro diff;H&R Super Sport springs;Koni red struts/shocks;Steeda dbl adj upper/lower arms. 466 rwhp@5750 rpm,464rwtq@4750 rpm on a Mustang dyno,over 400 rwtq from 2400-6100 rpms.
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post #5 of 11 Old 02-23-2005, 03:01 AM
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the cam could be anything.....

there is no sure way to know....

unless tested and checked as I have outlined...
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post #6 of 11 Old 02-23-2005, 06:57 AM
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302 non HO uses the 1-5-4-2-6-3-7-8 firing order
302 HO and 351 use the 1-3-7-2-6-5-4-8

http://www.classictrucksweb.com/tech...t_alternative/
351W (Windsor)
When swapping parts between these engines, the most confusion surrounds the camshafts. Camshafts will interchange, but the 351W has a different firing order (1-3-7-2-6-5-4-8) compared to the 289/302 (1-5-4-2-6-3-7-8). Compounding the situation, the '82-and-later 302 HO engines use the 351W firing order.

1986 LX Hatch converted to carborated w/ rebuilt 1982 302 and HV oil pump - mildly ported stock heads - Headman Longtubes - ALL smog deleted - duel dumped 2.25" H-Piped echaust w/ Flowmaster mufflers - matted to an AOD and stock geared (4 banger) 7.5" (for now!!!)
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post #7 of 11 Old 02-23-2005, 08:08 AM
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The roller cam didn't make the 302 an HO. Ford was putting hydraulic flat tappet cams in the 302 HO before they went to the roller cam
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post #8 of 11 Old 02-23-2005, 08:18 AM Thread Starter
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so when i determine the firing order, do i need to do anything with the injectors? im told i wont have to change the computer. by the way thanks for the help
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post #9 of 11 Old 02-23-2005, 02:12 PM Thread Starter
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any more

anyone else have anything to add?
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post #10 of 11 Old 02-23-2005, 09:05 PM Thread Starter
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ttt

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post #11 of 11 Old 02-24-2005, 03:00 AM
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only in the wildest and odd ball combinations is there a problem....
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