302 and 351 the same??
11-15-2008, 02:09 PM
#11
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Hey guys,
Got this problem ya see. my 1994 F150 5.8L has a flat tappet cam, what year was roller in 5.8L. i just got this motor too, so i need to know what to do fast.
Also anyone ever fool around with MAF on a 5.8 cause this one doesnt have it and i need it for the Cam i need to run. Is there a retro fit? Or a website that has the Kits?
Thanks.
Got this problem ya see. my 1994 F150 5.8L has a flat tappet cam, what year was roller in 5.8L. i just got this motor too, so i need to know what to do fast.
Also anyone ever fool around with MAF on a 5.8 cause this one doesnt have it and i need it for the Cam i need to run. Is there a retro fit? Or a website that has the Kits?
Thanks.
11-15-2008, 11:12 PM
#12
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Thread Starter
Hey guys,
Got this problem ya see. my 1994 F150 5.8L has a flat tappet cam, what year was roller in 5.8L. i just got this motor too, so i need to know what to do fast.
Also anyone ever fool around with MAF on a 5.8 cause this one doesnt have it and i need it for the Cam i need to run. Is there a retro fit? Or a website that has the Kits?
Thanks.
Got this problem ya see. my 1994 F150 5.8L has a flat tappet cam, what year was roller in 5.8L. i just got this motor too, so i need to know what to do fast.
Also anyone ever fool around with MAF on a 5.8 cause this one doesnt have it and i need it for the Cam i need to run. Is there a retro fit? Or a website that has the Kits?
Thanks.
If the 352 is a 94 it should be roller ready. Even though they are roller,, Ford used flat tappets in them. Should have the 2 tapped bosses in the lifter valley and an F4 starting identifying number by starter.
As for the MAF swap, check out the lightning site NLOC..
01-28-2010, 09:42 PM
#13
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i,m going thru the same swap and have it completed except i now have somer running issues.i had 94 fi50 4x4 302 auto i installed a 351 out of a 90 f350 2 wheel drive auto.
the front accesory mounts all bolted up perfect and just order a belt for a 351. the exhaust manifolds and y pipe came off the 351. crossover tube from the heads was fine . had to lengthen harnes for o2 sensor to meet up with the new location in different y-pipe, didn't have to change oil pan or anything. different pollution tubes but easy enough to re-route.
what i found so far. the 302(h.o.) and the windsor had the same firing order. the 351 was map and the 302 was maf. used the 302 computer and engine harness. had to switch the distributor out of the 351 to a newer style which came out of a 95. truck would start but ran pig rich and wouldn't idle. found that the throttle plates on the 302 had small holes in each butterfly and the 351 did not. swapped throttle boddies. truck will now idle , would stall unless i held throttle open previously. the truck still surges at idle and misses? not too sure why as it ran fine in other truck?
the front accesory mounts all bolted up perfect and just order a belt for a 351. the exhaust manifolds and y pipe came off the 351. crossover tube from the heads was fine . had to lengthen harnes for o2 sensor to meet up with the new location in different y-pipe, didn't have to change oil pan or anything. different pollution tubes but easy enough to re-route.
what i found so far. the 302(h.o.) and the windsor had the same firing order. the 351 was map and the 302 was maf. used the 302 computer and engine harness. had to switch the distributor out of the 351 to a newer style which came out of a 95. truck would start but ran pig rich and wouldn't idle. found that the throttle plates on the 302 had small holes in each butterfly and the 351 did not. swapped throttle boddies. truck will now idle , would stall unless i held throttle open previously. the truck still surges at idle and misses? not too sure why as it ran fine in other truck?
01-28-2010, 11:11 PM
#14
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It's my understanding that the 5.0L HO engine has a different firing order than other 5.0s due to the use of the 351 cam which requires the 351 firing order. Basically the 3 and 7 cylinders are swapped with the 5 and 4 cylinders in the order, putting each 360 degrees out of their standard 5.0L firing order phase to agree with the 351 order. (Remember, a complete combustion cycle has 720 degrees of rotation - two times around).
02-17-2010, 05:16 PM
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02-17-2010, 05:20 PM
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i have a similar delema. i have a 1990 f-150 4x4 5.0 auto. i am starting to build another 5.0 for the truck, i want to keep the stock intake and all of the electronics (no rewiring B.S.). should i get another flat tappet cam, or can i make it run correctly with a roller cam, maybe with a computer swap, W/O a mass air conversion.
02-17-2010, 05:35 PM
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looks like i found the answer to my own question...
notice pins 58 & 59, this is for the truck computer... batch fire.
http://fordfuelinjection.com/truckpinouts.html
and notice on the cars, they are sequential.
http://fordfuelinjection.com/5.0Lpinouts.html
looks like the only way to get a roller cam to work in my truck is to add mass air, and a 94-95 truck computer maybe even the wiring harness. looks like im getting a flat tappet cam.
notice pins 58 & 59, this is for the truck computer... batch fire.
http://fordfuelinjection.com/truckpinouts.html
and notice on the cars, they are sequential.
http://fordfuelinjection.com/5.0Lpinouts.html
looks like the only way to get a roller cam to work in my truck is to add mass air, and a 94-95 truck computer maybe even the wiring harness. looks like im getting a flat tappet cam.
Last edited by mikepotts; 02-17-2010 at 05:39 PM.
