302 cam swap question - Pirate4x4.Com : 4x4 and Off-Road Forum

snowracer · 08-04-2012, 10:06 PM

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

Whitetrash303 · 08-04-2012, 11:42 PM

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.

1badb2 · 08-05-2012, 12:48 AM

what he said ^^^

Also, did you get new valve springs, or push rods?

mustange70 · 08-05-2012, 07:02 AM

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)?

Ford rules · 08-05-2012, 10:26 AM

Ive got a 94 thats a roller block, from what i read only the 95/96 was roller but apparently not.

Rouphis · 08-05-2012, 11:15 AM

My understanding is that all of the 92-96s were rollers, but only the 94+ were MAF.

-Rouphis

outfitter540 · 08-05-2012, 02:24 PM

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.

snowracer · 08-05-2012, 07:49 PM

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.

08-04-2012, 10:06 PM	#1 (permalink)
snowracer Granite Guru Join Date: Sep 2009 Member # 141697 Location: Great White North aka BC Canada Posts: 523	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 __________________ THE HAYWAGON R.I.P THE HAYWAGON HAULER 1979 F250 going from hauler to wheeler

08-04-2012, 11:42 PM	#2 (permalink)
Whitetrash303 Hardcore Web Wheeler Join Date: Nov 2007 Member # 102426 Location: Denver Posts: 989	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. __________________ The Answer to 1984 is 1776 Last edited by Whitetrash303; 08-04-2012 at 11:44 PM.

08-05-2012, 12:48 AM	#3 (permalink)
1badb2 IDIot Join Date: Mar 2005 Member # 44595 Location: Denvergrad Posts: 1,143	what he said ^^^ Also, did you get new valve springs, or push rods? __________________ Rats get fat, while brave men die. Spare parts? If you're shooting your weapon to failure, it means you're really good to have stayed alive through that much combat. You're not fucked, You're just down a weapon, go get another off of one of the many dead bodies you created

08-05-2012, 07:02 AM	#4 (permalink)
mustange70 Registered User Join Date: Jan 2005 Member # 41097 Location: Calgary Posts: 2,108	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)? __________________ 90' C350 AKA 4 door 1 ton Bronco 96' Ranger: kings, EMF parts, 800hp SBF

08-05-2012, 10:26 AM	#5 (permalink)
Ford rules Registered User Join Date: Jan 2009 Member # 127442 Location: Pinckney MI Posts: 779	Ive got a 94 thats a roller block, from what i read only the 95/96 was roller but apparently not. __________________ [CENTER]95 Ranger 5.0L Built 4R70W 203-205 D-60 14B 3 link front 14'' kings 250lb-400lb 63"chevys detroit rear powertrac front 37' creepy crawlers. Build thread here[URL="http://pirate4x4.com/forum/showthread.php?t=878737"]http://pirate4x4.com/forum/showthread.php?t=878737[/URL] [B]Support the BRC![/B][/CENTER]

08-05-2012, 11:15 AM	#6 (permalink)
Rouphis Registered User Join Date: Dec 2011 Member # 206927 Location: Tampa, FL Posts: 17	My understanding is that all of the 92-96s were rollers, but only the 94+ were MAF. -Rouphis

08-05-2012, 02:24 PM	#7 (permalink)
outfitter540 can divide by 0 Join Date: Oct 2007 Member # 101654 Location: Syracuse, NY Posts: 331	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. __________________ Ford with tires and wheels and shit...

08-05-2012, 07:49 PM	#8 (permalink)
snowracer Granite Guru Join Date: Sep 2009 Member # 141697 Location: Great White North aka BC Canada Posts: 523	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. __________________ THE HAYWAGON R.I.P THE HAYWAGON HAULER 1979 F250 going from hauler to wheeler

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