This is topic Roller rocker size?? in forum Tech Talk at Northern California Ford Owners .
To visit this topic, use this URL:
https://californiafords.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=6;t=025601
Posted by CarlosLaz (Member # 11235) on
:
I just bought these heads off e-Bay http://www.ebay.com/itm/Ford-289-302-351W-5-0-Mustang-Aluminum-Heads-GT40-EFI-/230697294745?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item35b6a15b99
Now I'm trying to find some ROLLER ROCKERS to fit correctly how do I know what size to buy?
Posted by CarlosLaz (Member # 11235) on
:
some say 1.6 some 1.7 whats the difference?
Posted by 68stanger (Member # 7842) on
:
the ebay link does not have the info about what size rocker studs are included with the heads.....the pic also has none installed on them. most likely you will have to buy your own.
once you find what size stud you plan on going with.....
as for what rocker ratio, that depends on what your trying to do, like cam choice, degreeing it and what ratio will clear your pistons with everything installed/setup....also can those valve springs handle the extra lift from different ratio rockers
[ November 12, 2011, 03:02 PM: Message edited by: 68stanger ]
Posted by CarlosLaz (Member # 11235) on
:
Its a stock cam on it I'm just throwing the heads on. It doesn't include the studs or anything...that is my question how would I figure out what kind of studs & rockers to but for those particular heads?
Posted by wilit (Member # 3367) on
:
Hard to tell from the pics, but they look like they take a pedestal rocker.
Whether you go with 1.6 or 1.7 rockers will depend on the cam you use. The ad says the springs are only good for a .530" max lift. Most cams list the lift based on a 1.6 rocker. If you want to know what the lift will be with a 1.7, you divide the lift number by 1.6 then multiply that by 1.7. Here's an example.
The Ford E cam is listed as .498". .498/1.6=.311 (lift at the lobe)
With 1.7s it would be .311x1.7=.529"
Posted by CarlosLaz (Member # 11235) on
:
Ok well since I have a stock cam I should just go with 1.6 I'm assuming?
Posted by wilit (Member # 3367) on
:
quote:
Originally posted by CarlosLaz:
Ok well since I have a stock cam I should just go with 1.6 I'm assuming?
Stock HO cam is .444" I believe. With 1.7's, you'd be at .471". So you'd be okay running 1.7's with those springs.
What you really need to find out is if those heads are stud or pedestal mounts. If they're stud mounts, what size, 3/8 or 7/16.
Posted by LXjames (Member # 10791) on
:
damn bro i was just browsing ebay and saw these. good buy
Posted by CarlosLaz (Member # 11235) on
:
Cool thanks & yea its a steal I was gona pay $1200 for some edelbrock heads ..these are less then half the price
Fueled by Ford Mustang Owners
on CaliforniaFords.com