I have a 1977 460 that is going in my bronco as soon as the mount get to my door. I was wondering if this motor would benefit from a new timing chain, like a summit roller timing chain? Would it give this motor better performance? would it be worth the 50$? I would have to get new timing cover and water pump gaskets right? Or just use gasket maker? There arent any special tools needed right?

 

First get a pre 72 timing set to get the 8 deg. of retardation out of the cam that will help on power. Put on new gaskets for safety sake. Prob. need a good puller.

 

to pull the timing gears?

 

You'll need a puller to remove the balancer and possibly the lower timing gear(from the crank) As mentioned before, get the pre 72 (68-71) timing set. I believe parts stores sell gasket sets just for replacing the timing chain, so those are the only gaskets you will need.

 

Also 88-97 EFI Timing sets are straight up also.

 

Thanks for the info guys, I ordered the chain set and new gaskets. I ordered the 68-71 timing set for a 429 because my local parts store couldnt get any for a 460, will have it done tomorrow. Thanks.

 

Hey c_rossman, where did you get your info? I checked the Ford mototsport tech line they said my 97 460 was retarded but Im not sure those guys were 100% on that. I would be interested in finding out for sure.
THX Leadmic

 

I replaced a set myself

 

How did you know that it was stright up did you degree the cam? Also what year is your truck ? Was it a double roller chain?
I havent been able to get too many answers about the fuel injected 460 internals thats why all the questions.
THX Leadmic

 

My truck is a 93, It was over a year ago, but I used a protractor to double check the timing. I believe the dowel pin is perpendicular to the mark on the timing gear.It was a double roller chain.The only reason Ford used a retarded timing set is for emissions, And EFI fixed this problem so the put the timing straight up.

 

So my question is - can anyone quantify what this will do to emissions? I would love to perk up my motor but would hate to flunk the emissions test.

I am in Oregon with a non-cat truck. It has an air pump and the other smog spagetti vacuum hoses on it.

Thoughts?

LWJ

 

They retarded the cam in order to pass fed emmission standards. May pass may not. I hate smog *****. You may have to lean it out to pass.

 

I changed out my timing chain to the pre-72 Fifteen years ago and I have been through seven smog checks with no problems. The emissions always pass, sometimes I get hassled over the plumbing.

 

i just put on a Coyes double roller chain on my 71 motor going into the 76 f-250. it goes on 2 degrees retarded, straight up, or 2 degrees advanced.

 

I hate to jump in here and ask something on a thread that's not mine but I was also thinking of having a pre 71 timing chain and possibly a cam in my 86 250 with a 460 in the future. How involved is it to replace? Is it necessary to pull the engine to perform this or just the radiator? Forgive my ignorance, I am still learning