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Old 08-09-2013, 03:00 AM   #1
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351w cam in 302?

I currently drive a 1995 V6, but I'm always looking around for older engines and cars since that what I would prefer to have.

ANYWAYS, I read that a 351w cam will fit in the smaller 289/302. You just have to change the firing order. A 351w cam will sound more aggressive in the smaller 289's and 302's, so how would it sound if you were to get a cam with a lot of lope, like one of the THUMPR series cams for the 351 and threw it in a 302?

I always imagine something kinda like a harleys idle, maybe louder. Would there be any problems using a cam like that in the smaller 302's and 289's?
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Old 08-09-2013, 11:12 AM   #2
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I currently drive a 1995 V6, but I'm always looking around for older engines and cars since that what I would prefer to have.

ANYWAYS, I read that a 351w cam will fit in the smaller 289/302. You just have to change the firing order. A 351w cam will sound more aggressive in the smaller 289's and 302's, so how would it sound if you were to get a cam with a lot of lope, like one of the THUMPR series cams for the 351 and threw it in a 302?

I always imagine something kinda like a harleys idle, maybe louder. Would there be any problems using a cam like that in the smaller 302's and 289's?
If you change the firing order, it won't match the piston locations according the crank. I would think you would need to change the crank. 351 has a 1/2 inch more stroke, not sure if that's all in the connecting rods or also with the crank.
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Old 08-09-2013, 01:58 PM   #3
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I thought the same thing when I heard of it.
I was just reading about it the other day on some forum, it switches the compression stroke for the exhaust stroke, so that it doesn't need a different crank.
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Old 08-09-2013, 10:43 PM   #4
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I thought the same thing when I heard of it.
I was just reading about it the other day on some forum, it switches the compression stroke for the exhaust stroke, so that it doesn't need a different crank.
Sounds interesting. Why not just get an aggressive Crane cam?
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Old 08-11-2013, 08:47 AM   #5
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...I read that a 351w cam will fit in the smaller 289/302...

Why not just get an aggressive 289/302 cam? I once installed one with a .530 lift, 320 duration, and 94 overlap. That thing sounded like a fire breathing dragon at a 950rpm idle. Of course you'll have to match your compression and carburetion to it.
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Old 08-19-2013, 03:14 PM   #6
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If you change the firing order, it won't match the piston locations according the crank. I would think you would need to change the crank. 351 has a 1/2 inch more stroke, not sure if that's all in the connecting rods or also with the crank.
uhm, wrong. ford changed the firing order on mid 80s 5.0 cams to the 351w firing order, in fact they used the cam from a 351w marine engine initially, with NO changes to the crankshaft.

to swap a 351w cam into a 289 or 302 means you have to change the firing order from 1-5-4-2-6-3-7-8 to 1-3-7-2-6-5-4-8. its that simple.
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Old 08-19-2013, 04:18 PM   #7
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uhm, wrong. ford changed the firing order on mid 80s 5.0 cams to the 351w firing order, in fact they used the cam from a 351w marine engine initially, with NO changes to the crankshaft.

to swap a 351w cam into a 289 or 302 means you have to change the firing order from 1-5-4-2-6-3-7-8 to 1-3-7-2-6-5-4-8. its that simple.

Yeah i read about that on some forum, I first looked into because they said it would sound more aggressive, but it's also kinda converting the engine into a high output.

I read something about it being easier on bearings, or less vibrations. Do you know if those are true.
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Old 08-19-2013, 04:58 PM   #8
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Yeah i read about that on some forum, I first looked into because they said it would sound more aggressive, but it's also kinda converting the engine into a high output.

I read something about it being easier on bearings, or less vibrations. Do you know if those are true.
in fact yes, part of the reason ford changed the firing order is that it is in fact easier on the number one main bearing. that takes the most abuse as it is the least supported and has to deal with the load of the accessory drives. add to that the fact that the number one and number five cylinders are firing back to back, it really loads the number one main bearing. with the new firing order the number two main bearing gets the load with the number two and number six cylinders firing back to back, but it has less overall load on it an dis better supported.
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Old 08-19-2013, 08:13 PM   #9
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so the 351/5.0HO firing order would actually be something to look into even if I didn't want a high performance engine, maybe just a longer lasting engine.
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Old 08-19-2013, 08:15 PM   #10
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Quote:
Originally Posted by rbohm View Post

uhm, wrong. ford changed the firing order on mid 80s 5.0 cams to the 351w firing order, in fact they used the cam from a 351w marine engine initially, with NO changes to the crankshaft.

to swap a 351w cam into a 289 or 302 means you have to change the firing order from 1-5-4-2-6-3-7-8 to 1-3-7-2-6-5-4-8. its that simple.
Thanks for the info. It didn't make sense at first. Pretty cool.
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