78 vs 86 302
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78 vs 86 302
Couple of questions here - I am planning on putting a 302 into my 79 f-150 4x4.
1. Is the oil pan on an 86 302 in an f-250 4x4 a rear sump?
2. If yes, will it work on a 78 302 out of an f-150? (I am putting the 302 out of a 2wd into a 4wd and need a rear sump pan).
My other option is to take the 86 302 and rebuild it. IF I did that, will an intake from the 78 302 (carbed) match up w/ the 86 302 (fuel injected)? I do not want to mess w/ the fuel injection.
Thanks
1. Is the oil pan on an 86 302 in an f-250 4x4 a rear sump?
2. If yes, will it work on a 78 302 out of an f-150? (I am putting the 302 out of a 2wd into a 4wd and need a rear sump pan).
My other option is to take the 86 302 and rebuild it. IF I did that, will an intake from the 78 302 (carbed) match up w/ the 86 302 (fuel injected)? I do not want to mess w/ the fuel injection.
Thanks
Cargo Master
Joined: Dec 2003
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From: Sunny Florida
The oil pans will swap no problem and yes the 86 pan should be a rear sump pan.
The only thing you may have over looked is the 78 motor is a 28 balance motor and the 86 will be a 50 oz balance motor. So you front pulleys may not fit on the balancer and if they do will they line up? Also the flywheel has to match the balance so your 78 flywheel will not fit your 86 motor. It will bolt on but shake real bad when you start it up.
I just thought of something else. If the 86 motor has a roller cam then you need a steel cam gear. If you buy an 85 mustang dizzy it will have the steel gear and is an electronic dizzy that uses the older style modules (fender mounted type about 4x4 in size) with the blue tab.
The only thing you may have over looked is the 78 motor is a 28 balance motor and the 86 will be a 50 oz balance motor. So you front pulleys may not fit on the balancer and if they do will they line up? Also the flywheel has to match the balance so your 78 flywheel will not fit your 86 motor. It will bolt on but shake real bad when you start it up.
I just thought of something else. If the 86 motor has a roller cam then you need a steel cam gear. If you buy an 85 mustang dizzy it will have the steel gear and is an electronic dizzy that uses the older style modules (fender mounted type about 4x4 in size) with the blue tab.
Last edited by RTM; Jan 22, 2005 at 05:10 AM.
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Thanks for the reply - not exactly what I was hoping for, but helpful.
Do you know what year the flywheel balance changed?
As far as the front pulleys, we would have the entire setup so would plan on using it all off of the 86.
Does anybody have any info on changing from efi to carbed?
Do you know what year the flywheel balance changed?
As far as the front pulleys, we would have the entire setup so would plan on using it all off of the 86.
Does anybody have any info on changing from efi to carbed?
Cargo Master
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From: Sunny Florida
The balanced changed in 1982.
I know you will have the entire pulley set up but you have to make sure the bottom pulley will fit the newer motor and still have the correct belt alignment because you can not swap dampners.
Going from EFI to carb is easy. Just bolt on a carb intake, change the dizzy to an electronic one for a carb which I already mentioned. Aother thing that will require a little more effort is the EFI motor will not have a fuel pump eccentric for the fuel pump. This may require a new timing set that allows for the eccentric to be mounted and what I mean is on my 94 motor the cam gear is thicker so I had to machine the eccentric down to clear the timing cover. You can check for clearence before buying a new timing set. The timing cover on the 86 mat still have the opening for the fuel pump to mount? I am not sure which year ford stopped making the cover with this opening. Ford just blocked the opening off for a few years. This may require you to swap timing covers as well. Thats all I can think of for now. bob
I know you will have the entire pulley set up but you have to make sure the bottom pulley will fit the newer motor and still have the correct belt alignment because you can not swap dampners.
Going from EFI to carb is easy. Just bolt on a carb intake, change the dizzy to an electronic one for a carb which I already mentioned. Aother thing that will require a little more effort is the EFI motor will not have a fuel pump eccentric for the fuel pump. This may require a new timing set that allows for the eccentric to be mounted and what I mean is on my 94 motor the cam gear is thicker so I had to machine the eccentric down to clear the timing cover. You can check for clearence before buying a new timing set. The timing cover on the 86 mat still have the opening for the fuel pump to mount? I am not sure which year ford stopped making the cover with this opening. Ford just blocked the opening off for a few years. This may require you to swap timing covers as well. Thats all I can think of for now. bob
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Thanks
I guess I am still missing it on the front pulleys. The 86 is the newer motor and I thought I would use that entire setup (I wouldn't be taking anything from the 78).
Maybe I will just try to line up a flywheel for the 78 and rebuild it with the 86 oil pan.
Any good sources for a flywheel?
I guess I am still missing it on the front pulleys. The 86 is the newer motor and I thought I would use that entire setup (I wouldn't be taking anything from the 78).
Maybe I will just try to line up a flywheel for the 78 and rebuild it with the 86 oil pan.
Any good sources for a flywheel?
Cargo Master
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From: Sunny Florida
If you use the complete pulley set up from the newer then there won't be any problems. I only mentionded there could be a problem with the bottom dampners not being the same and now that I think about the newer may have a reverse rotation water pump on if it has serpentine belt system.
In your case you will have the old three prong pressure plate so an older flywheel will work for sure with your set up. A newer flywheel may have both types of mounting holes. I don't think I have any more flywheels lying around. I would check on ebay for one. that's the easiest place to start. if you want a good deal then search around in some other forums that deal with mustangs and or trucks. I know of a few sites and if you choose to search the net for a better deal I will post the sites for you.
In your case you will have the old three prong pressure plate so an older flywheel will work for sure with your set up. A newer flywheel may have both types of mounting holes. I don't think I have any more flywheels lying around. I would check on ebay for one. that's the easiest place to start. if you want a good deal then search around in some other forums that deal with mustangs and or trucks. I know of a few sites and if you choose to search the net for a better deal I will post the sites for you.
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From: Destin/Ft. Walton Beach,
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Cargo Master
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From: Sunny Florida
That's just what I have always read. This is the first time I have ever seen that an 81 had the 50oz balance? Not saying your wrong but what did you find this in and did you own it since it was new? Could it have had a motor change? Did the casting dates show it to be all 81? Just trying to learn something here so that I don't mislead any others.
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Posting Guru
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From: Destin/Ft. Walton Beach,
Q.: What is the crankshaft balance factor of my 302 or 351W/C engine?
A.: 1968-80 302 engines were built with a 28-ounce imbalance factor.
1981-2001 302 engines were built with a 50-ounce imbalance factor.
1969-97 351W engines were built with a 28-ounce imbalance factor.
1970-74 351C engines were built with a 28-ounce imbalance factor.
Note: Severe engine damage will result if you use the wrong flywheel or damper on your engine.
http://www.fordracingparts.com/faq/faq.asp
A.: 1968-80 302 engines were built with a 28-ounce imbalance factor.
1981-2001 302 engines were built with a 50-ounce imbalance factor.
1969-97 351W engines were built with a 28-ounce imbalance factor.
1970-74 351C engines were built with a 28-ounce imbalance factor.
Note: Severe engine damage will result if you use the wrong flywheel or damper on your engine.
http://www.fordracingparts.com/faq/faq.asp
Postmaster
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From: Maple Valley, WA
Originally Posted by matt17
just because the 86 motor is injected it may or may not have a roller came,common in trucks but cars had rollers 86 up!
Elder User
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From: NE Wisconsin
I am doing this same thing right now. The 86 should have a v belt yet, NOT the reverse rotation water pump. However, being a different damper, the pulleys won't line up. I had to go to the junkyard today and rumage for a water pump pulley. The timing cover will have to be changed or the casting will have to be knocked out. The hole is cast into the cover, but not punched out. Not sure on the 78, but you might have issues with the dipstick. I had to plug the hole in the block and use the one in the oil pan. If you change pans, you will need to change the pickup. That SHOULD be about it.
Posting Guru
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From: Destin/Ft. Walton Beach,
That's funny. Even an 81 T-Bird 5.0 I pulled from the car myself, did not have a V belt, and had the reverse rotation water pump and fan. The hole in the timing cover had a steel plug, similar to a freeze plug. It's likely there isn't a fuel pump eccentric too.
