Roller Cam Vs. Flat Tappet In 302
#31
03-31-2014, 05:58 PM
For some reason my photo isn't showing up, it's a pic of a factory spider and dogbones in a late model roller block. Here's a link
IMG_0524 on Flickr - Photo Sharing!
IMG_0524 on Flickr - Photo Sharing!
Thank you for the photos Paul, they are a very big help.
#32
03-31-2014, 09:03 PM
Logistics Pro
Yes, the roller blocks started in 1985. Even though the F150 came with a roller block, they still used flat tappet cams well into the 1990s. The Ford Mustang, however, got the roller block and a roller cam for the 1985 model year. 1985 was the last year for a carbureted Mustang, and 1985 was the ONLY year that the Mustang offered both the 4V carb AND roller cam.
As for when Ford started calling the 302 a 5.0, that came much earlier. I do know that in 1982, the Ford Mustang GT still used a flat tappet cam and 2V carb, and the car came with the famous "5.0" emblems on the side. I think the "5.0" and "EFI" moniker was placed on the F150 intake starting with the 1987 redesign, however.
For some reason though, I noticed that most people tend to call the Mustang motor the "5.0", and the truck motor the "302," regardless of the year, even though they are basically the same.
As for when Ford started calling the 302 a 5.0, that came much earlier. I do know that in 1982, the Ford Mustang GT still used a flat tappet cam and 2V carb, and the car came with the famous "5.0" emblems on the side. I think the "5.0" and "EFI" moniker was placed on the F150 intake starting with the 1987 redesign, however.
For some reason though, I noticed that most people tend to call the Mustang motor the "5.0", and the truck motor the "302," regardless of the year, even though they are basically the same.
As far as I'm concerned, all engines have names, not a displacement that can be converted between units however you want. Ford put a 5.0 in Mustangs and a 302 in everything else, I don't care if they're the same engine
#33
08-27-2016, 10:57 PM
Roller or flat tappet
Ive seen several different comments on when and what years and model vehicles the 302v8 acquired a roller cam. So what is it? in this thread alone ive seen 3 different years 85, 87, & 89. I have an 84 bronco 302 2bbl and reading this thread has brought alot to my attention. Im now questioning what i can even do with my motor. And how long its ran with out the Vddp zinc additive as im almost certain it has a flat tappet cam ##ck me!
#34
08-28-2016, 08:07 AM
Welcome to having a Ford. Ford always slowly phased in changes it seems, sometimes mid-year. So you can have the same year vehicle and be equipped differently.
I have had many many conventional tappet engines and have had no problems with cam wear with the newer oils. I am sure the zinc helps, but so far it seems to be over blown just like the leaded/unleaded fuel was over blown.
I have had many many conventional tappet engines and have had no problems with cam wear with the newer oils. I am sure the zinc helps, but so far it seems to be over blown just like the leaded/unleaded fuel was over blown.
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