[85snakeeyes]

out of all the modifications ive done to my stang, i havent ever had a 'new' cam.. so my question is simple. i got a lunati .548 its not a roller cam, but when i put the roller rockers in the gap between the cam and rocker is a more appropriate distance, i bought a new set of factory rockers that seem to be loose, as in i can simply push them off... what should i do? and what happens if i run my rollers on that cam?

 

[rjf2380]

when u say u push the rockers off , are u saying they are not tight to push rods,,?if so u may need to change the push rods do to larger lobes on the cam,,,

 

[85snakeeyes]

by push rod do you mean the valve or the lifter? 2.3 is an ohc no push rods there bro.. i want to say the capri had ohv push rod set up.. not sure never played with them.. i mean the stock rocker sits on the lifter and the valve and has a gap between the rocker and the cam

 

[Lazypig]

you cant use the roller rockers with that cam it will wreck it you must use regular ones

 

[TOM RENZO]

Personally i do not understand the QUESTION!!! But i have used roller followers on a slider cam many times . Peace Tom

 

[85snakeeyes]

i was asking if could use the roller followers with the slider cam... if that makes sense

 

[TOM RENZO]

Ok i do it all the time. Some people think i am nuts but it works just FINE. I actually did it as a BET. I installes a set of roller sliders in my sisters Drop top stng years ago on a slider cam . Its still working FINE. Who knows maybe i started a trend. peace Tom

 

[b_chandler]

You have to be careful with that. On small cams it may not be an issue. but the ratio on the roller followers is higher than that of the slider follower. On a slider cam, where the valve lift specs on the cam card are just shy of coil bind, adding roller followers could easily push that number over into coil bind range.

As with anything related to "building" a motor rather than just "assembling" one, it pays to check, check, and check again before you button it up. Proper valvetrain geometry is essential for engine longevity and power production.

 

[TOM RENZO]

BIG C yes their seems to be a discrepency in the slider ratios from the early and late RR cams. Before they threw me off TF we were having a discussion about this. I researched it with a ford buddy of mine and it pans out. Apparrantly the early Ranger Roller(RR) has a bigger ratio. Personally i cant find an early rocker to compair it to a newer one. Ford says the early higher rocker with the higher ratio is OBSOLETE. it has me stumped to be HONEST. But you do point out a very good thing. Always check valve Geometery. That is a given. Actually my sisters stang was being buttoned up and i only had 5 slider rockers in the shop. I never usually use them or the cams. But her car had a slider cam and i had no rockers other than a set of late RR ones. So i installed them and they have been in her car ever since. I really never collected on that bet.So when i go to work today i am going to settle up with Burt????? Peace Tom

 

[b_chandler]

Which do you need? Slider follower or early (circa '91) Roller follower? I'm sure I have both. Actually, if there's a difference in roller follower ratios, I'd imagine the change would have happened around the same time as the valve stem change so I definitely could help out in that respect. Somewhere in my pile of parts I intend to use is a complete set of the cast roller followers for the big stem (pre-'96?) valves.

In my notebook of 2.3L fun facts that seems to have disappeared in the last two moves, I had the follower ratios for both the slider and the early roller pieces. Still pisses me off that I can't find that book.

I didn't know about the TF exile. I'm sure the sleep you lost over it can only be measured in seconds.

P.S. I vaguely remember pointing out the higher ratio to someone on a forum somewhere when the subject of stock roller cam lobe lifts came up. Seems everyone was up in arms that the hallowed Ranger Roller had smaller lobes than the stock slider N/A and Turbo cams. The difference and a little more was made up with the followers.

 

[TOM RENZO]

DUDE i lost about 30 seconds of SLEEP that night. Yes BIG C i think you are correct. The early RR has a bigger ratio. And the later has a smaller ratio. But all the new stuff uses the late roller rockers. I am going to look through my notes and post it. I do not have any early roller rockers but i do have late ones. Peace Tom

Found this?????

1995-2000 2.3L and 2.5L specs
Lobe Lift
Intake 0.2163
Exhaust 0.2163
Rocker arm (cam follower) ratio 1.86:1
Theoretical Valve Lift @ Zero Lash
Intake 0.402
Exhaust 0.402
1992-1994 2.3L specs Lobe Lift
Intake 0.2381
Exhaust 0.2381
Rocker arm (cam follower) ratio 1.64:1
Theoretical Valve Lift @ Zero Lash
Intake 0.390
Exhaust 0.390

NOTE the difference in follower ratio????? I tell you i am stumped on this one. Even the KNOW it alls on TF were stumped by this posting by FORD????? I am all ears on this one. This one has me a little confused.

 

[b_chandler]

The late roller followers are stamped steel right? Like smog-era Windsors. I know the early ones are cast based on what I have in my motor and in my parts bin.

I don't recall the exact number, but the sliders come in somewhere around 1.4 or 1.5 if memory serves.

Bottom line, as far as lobe lift goes, They all come in relatively close. Next myth to bust would be duration and LSA. then again, they're stock cams. Is the puzzle worth solving?