john89 5.0

hey everyone! i was looking on thisforum and couldnt find what i was looking for. just some general knowlegde stuff and i was wondering what the difference would be from a 302HO and a 302. how easy would it be to make a 302 into a 302HO? what would you need to do this. thanks guys. im just trying to learn as much as possible bout these engines and any help would be greatly appreciated

GGT

firing order is different, so it must have a different crankshaft

67mustang302

Crank is the same. Different cams to change the firing order(compression on one cylinder becomes exhaust etc). Carb it's easy, HO cam and rewire the distributor, with EFI not so much, you can't just swap injector wiring because it screws up readings from the O2 sensors. It's an issue going from the HO to non HO firing order, but I dunno if it's true going the other way.

tohoopty

well from what i found out to convert to h.o.you need to change the cam,heads,intake,computer,injectors.but im in the same boat too.i found out my motor isnt h.o either so im just gonna carb it and change the heads and cam.

67mustang302

The only thing different mechanically is the camshaft.

FivePointOhh

cam change, computer change, fire order change. thats it for efi non-h.o. to h.o.

so if you pull a motor out of a non ho car and put it in an ho computer ready car, all you need to change is the cam and fire order

lxman1

And intake. The TB and ports in the intake are smaller in a non-HO 5.0 such as a Crown Vic, T-bird, Cougar, etc. The HO was only offered in Mustangs and Mark VII's (87-up)
The injectors are smaller too, only 14lb instead of 19lb.

john89 5.0

alright so all i would have to change is the cam, intake and firing order and put it into a 5.0HO car and im set? how exactly would u change te firing order?

Liv2roc

the cam changes the firing order all you have to do is move the plug wires on the distributor cap the match the new firing order

john89 5.0

thanks guys. so would i need to swap over the 19lb injectors in the current 5.0HO engine to the one i would change into a HO?

My engine was ran hard and is startin to wear out on me and this seems like a good solution to the prob. i want a blank engine that i can upgrade myself.