need advice on which rockers to get

[bobbywalter]

I did remember to get the pushrods also. LOL

Now I will probably have to get different valve covers, with the way my luck runs.

set the valve covers down and move em a lil so the mark the baffles...just use a ball peen or a punch to smash the baffles a lil to clear if they for some reason dont fit.

dont really remember having issues with these though on reg metel covers.

 

[baddad457]

I have heard that proform stuff is china made. Not sure if its true or not though.

I ordered those parts tonight, hopefully have them on Saturday if i don't work. That will add about .03 to .04 to the cam lift correct? Will it be enough to notice? Just curious.

1.7's add .030 to the valve lift numbers. There are several benefits gained here, the most gain is the loss of friction in the move to a roller trunion (rocker pivot) some from the increased ratio, and to a lesser degree, some power from the roller tip at the valve and the stabilized ratio from the stiffer rocker. All in all Ford found a 15 hp gain in the Cobra 5.0 from this mod. Cooler oil was another benefit.

 

[baddad457]

set the valve covers down and move em a lil so the mark the baffles...just use a ball peen or a punch to smash the baffles a lil to clear if they for some reason dont fit.

dont really remember having issues with these though on reg metel covers.

Just don't do this with the O.E HO finned aluminum covers. Everytime I did, the rivets ended up loosening and the baffles dropped later. The noise created when that happened will scare the pants off you, until you figure out what the noise is from.

 

[The Weasel]

These rockers will work fine with no other mods required. These are esentially the same rockers as the 93 Cobra 5.0's had from the factory(which were made for Ford by Crane). Just make sure and buy new pushrods (6.25" long) as roller cammed engines don't spin the pushrods and the rocker end of the pushrods end up with a somewhat "knife edge" after about 100K miles. Pedestal rockers need no studs nor guide plates to align them, the stamped steel channels under the rocker pedestals perform this function. Just bolt em down and torque to 25 ft/lbs when you install em. No other adjustments should be needed with your combo.

Does that mean that the new rocker arms will rotate the pushrods? When I looked at mine last weekend I didn't notice any edge on them.

 

[bobbywalter]

Just don't do this with the O.E HO finned aluminum covers. Everytime I did, the rivets ended up loosening and the baffles dropped later. The noise created when that happened will scare the pants off you, until you figure out what the noise is from.

yeah, you cut/hole saw like 3/4 1 in the baffles in the factory alum covers....good catch!


i have hacked em right out before and the damn things would suck oil into the intake so be reasonable.

 

[Teddyzee]

yeah, you cut/hole saw like 3/4 1 in the baffles in the factory alum covers....good catch!

What?

I have Crane/Ford 1.7 roller rockers. I'm using the stock aluminum 5.0 HO valve covers. I needed to flatten and trim the baffle on the passenger side. I you remove it, the intake will suck in a lot of oil.
Other 1.7 rockers are square and larger, may not work with stock valve covers unless you add extra or thicker gaskets.

 

[v-8power]

Thanks for the info fellas. I appreciate it.

 

[baddad457]

Does that mean that the new rocker arms will rotate the pushrods? When I looked at mine last weekend I didn't notice any edge on them.

No. Roller rockers don't spin in their bores. Flat tappet lifters get spun by their position in relation to the cam lobe they're sitting on. It's this motion that imparts the spin in pushrods in a flat tappet engine. As I said, it's a "somewhat" knife edge, you really have to examine them closely and they usually don't wear like this until after 100K miles, even then you have to know what you're looking at to see what I mean. There will be wear on two sides of the rocker end of the rod where a rod from a flat tappet engine will be perfectly round.

 

[originalnitro]

I did remember to get the pushrods also. LOL

Why would you order pushrods without checking for the proper length

 

[bobbywalter]

What?

I have Crane/Ford 1.7 roller rockers. I'm using the stock aluminum 5.0 HO valve covers. I needed to flatten and trim the baffle on the passenger side. I you remove it, the intake will suck in a lot of oil.
Other 1.7 rockers are square and larger, may not work with stock valve covers unless you add extra or thicker gaskets.

i have hacked em right out before and the damn things would suck oil into the intake so be reasonable.

what? what?

i do not recall an issue with these particular rockers at all. but maybe i had used a spacer...i guess thats possible.

with other setups removal was done and obviously a mistake..ended up making a custom baffle and the worry of it falling apart till new covers were obtained, but a hole where the stud/adj nut stuck up and some light mashing allowed for trouble free operation.

 

[The Weasel]

No. Roller rockers don't spin in their bores. Flat tappet lifters get spun by their position in relation to the cam lobe they're sitting on. It's this motion that imparts the spin in pushrods in a flat tappet engine. As I said, it's a "somewhat" knife edge, you really have to examine them closely and they usually don't wear like this until after 100K miles, even then you have to know what you're looking at to see what I mean. There will be wear on two sides of the rocker end of the rod where a rod from a flat tappet engine will be perfectly round.

Ah ok I see what your saying. I'm going to take a look at them this weekend to see what I need to do about the valve covers.

 

[v-8power]

Why would you order pushrods without checking for the proper length

Just make sure and buy new pushrods (6.25" long)

baddad457 already told me what length to order.

 

[baddad457]

Why would you order pushrods without checking for the proper length

The stock length pushrods will be fine with what he's running. (6.25")

 

[NMB2]

The stock length pushrods will be fine with what he's running. (6.25")

good luck with that.

 

[baddad457]

good luck with that.

Been there & done it many times. Never had a problem. Running them currently in my 331 with Canfields and 1.7 rockers. 7 years running in it now.