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Old 08-04-2012, 10:06 PM   #1 (permalink)
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302 cam swap question

ok i have been searching and have been getting lots of mixed answers so want to ask here for some help

helping a friend do a motor swap in his 92 f150, truck has a roller 302 in it stock. we used a good block from a 90 and it was non rolller. he put in comp cams 35-512-8 http://www.compcams.com/Company/CC/c...csid=1446&sb=0 with new lifters and so on. no this cam swaps the firring order to a 302ho/351 order and truck runs once we changed to the new firring order

what i want to know is will there be any problems with the fuel injetors firring in the right order to match the new plug firring order. have really been getting mixed answers on this. some say its fine the way it is and others say you have to change the injetor plugs around

what say pirate
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Old 08-04-2012, 11:42 PM   #2 (permalink)
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Depends on what PCM and harness you have. IIRC most of the early F-150 stuff is bank fired (not sure what year that changed). So I don't see why it would matter.

Now if you had something like a sequential Mustang PCM in it, you'd have issues.
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Old 08-05-2012, 12:48 AM   #3 (permalink)
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what he said ^^^

Also, did you get new valve springs, or push rods?
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Old 08-05-2012, 07:02 AM   #4 (permalink)
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Mass air didn't come till after 95 or so in the trucks, so its bank fire, so you're good to go. Thats pretty early for a roller block in a truck, thought they didn't come till mass air came in, sure it wasn't swapped (honesty thats the first 92' I've ever heard of with a roller block)?
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Old 08-05-2012, 10:26 AM   #5 (permalink)
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Ive got a 94 thats a roller block, from what i read only the 95/96 was roller but apparently not.
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Old 08-05-2012, 11:15 AM   #6 (permalink)
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My understanding is that all of the 92-96s were rollers, but only the 94+ were MAF.

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Old 08-05-2012, 02:24 PM   #7 (permalink)
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302 cam swap question

The 351 was roller ready in 94, 302s were roller ready much earlier. Don't know when they actually came roller stock in trucks. MAF is 95+ but not every truck got it.
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Old 08-05-2012, 07:49 PM   #8 (permalink)
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yes the stock 92 block is a roller block but not a HO and is not mass air flow as its speed density.

so what everyone is saying is that on a sd controlled motor its bank fire injectors? if that is the case then my friend should be fine if we just change the plug firring order and leave the injectors alone.
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Quote:
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I love old trucks. everything is made of mo'fuckin' steel. Need to move some shit cause you made it more awesome? NBD. drink a beer, grow a beard, cut it, grind it, weld it back.
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