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Topic Review (Newest First)
02-06-2011 09:53 PM
001mustang is there some kinda spec for how smooth valve stem tips have to be before installing new lifters.

Do you have to file/sand/polish valve tip flat or something?

My valves never rotated and there is a very small groove worn in them.
Guess i don't rpm engine enough to float valves.

wouldn't want to wreck new rollers.

maybe change geometry to form new groove in a different location?
02-06-2011 09:35 PM
001mustang i did not notice them either.
eyes glued on the eye candy lifters and girdle.
02-06-2011 09:10 PM
Landshark928 Just realized how dirty my plug wires are...
02-06-2011 08:34 PM
001mustang i would stick a photo of those on VC...unless...of course...you find a glass one.
02-06-2011 07:54 PM
Landshark928 I was blown away by how nice they are for the price. You need clear valve covers to show them off.

02-03-2011 04:29 PM
eloc431962 Scorpion's Been thinking that's what i am going with on my engine, I have really heard good thing's about them. I was thinking Harlan Sharp or Scorpion's or Comp Gold. I have Harlan Sharp's on my 400 in my T/A i really like them also. JMO
But i like having me some fine jewelry in my engine. That was for you Eric.

Cole
02-03-2011 04:27 PM
my87Z i've used them in one of my motors that i built a while ago, i dont think you will find anyone around who will have something negitive to say about scorpion rockers
02-03-2011 03:31 PM
Sick467 I can't speak for the Sr heads. Mine are the Jr's. My Jr's had 7/16-14 holes tapped in them for the studs and I used these...

http://www.summitracing.com/parts/ARP-334-7203/

The 1.9 Affective Length studs will bolt up and actually work with my Juniors, BUT the portion of the stud that lies inside the rocker would be all threads - Poor application. The longer (more expensive) studs allow for more of that portion to be shank (no threads), but leaving just a few in there so you don't run out of threads for tightening the poly locks on. I assume ALL roller rockers are designed to ride mostly on the shank of the stud, not entirely on the threads. The threads are always slightly smaller in diameter than the shank. How important is this? - I don't really know, but my gut drives me to do it the way I do it.
02-03-2011 02:30 PM
001mustang
Quote:
Originally Posted by Sick467
I've got them in my 331 stroked 289 on top of some iron World Products Windsor Juniors. They come highy recomended. The only thing I can say is that my heads came with 3/8" studs that would have been to short anyway (even for 3/8" rockers???), not to mention the scorpions need 7/16" studs. I found some studs at the tune of 100$ for the set. I'm sure it depends on your heads and/or your machine shop's capabilities. I just want you to think far enough ahead so that the 100$ cost does not get you like it did me.
I have world products windsor sr heads.

need world prod part # 830480 (7/16 stud kit).
could not find on google.

I was hoping these will work?

http://www.summitracing.com/parts/ARP-100-7101/

I bet the windsor heads are tapped out to 3/8"-16??????

http://www.summitracing.com/parts/ARP-135-7102/.

Do you know?
02-03-2011 01:54 PM
Sick467 I've got them in my 331 stroked 289 on top of some iron World Products Windsor Juniors. They come highy recomended. The only thing I can say is that my heads came with 3/8" studs that would have been to short anyway (even for 3/8" rockers???), not to mention the scorpions need 7/16" studs. I found some studs at the tune of 100$ for the set. I'm sure it depends on your heads and/or your machine shop's capabilities. I just want you to think far enough ahead so that the 100$ cost does not get you like it did me.
02-03-2011 01:06 PM
001mustang
Quote:
Originally Posted by ericnova72
^^^ Agree, Scorpion is among the best, if not the best stud mounted rockers. Very nice, like jewelry, and American made down in Florida. Gauranteed against breakage for life, good for like .800" lift and 1000lbs spring pressure. Company has very good customer service also.

They also make a very nice roller lifter, and are branching out into other engine parts. Supposed to be a good shaft rocker set up coming from them soon.
I'll be sure to make purchase before the shaft rocker comes out.

Don't need any more temptations
02-03-2011 05:23 AM
ericnova72 ^^^ Agree, Scorpion is among the best, if not the best stud mounted rockers. Very nice, like jewelry, and American made down in Florida. Gauranteed against breakage for life, good for like .800" lift and 1000lbs spring pressure. Company has very good customer service also.

They also make a very nice roller lifter, and are branching out into other engine parts. Supposed to be a good shaft rocker set up coming from them soon.
02-03-2011 04:46 AM
Andy79Z28
scorpion

They are very good rocker arms. I have been using them for 12 years now in my 79Z28 350 500hp running with nitrous in the 10.7 area. Very solid product! Very good company.
02-03-2011 03:46 AM
001mustang
scorpion roller rocker ok?

Think these roller rockers are any good?


Rocker Arms, Stud Mount, Full Roller, Aluminum, 1.5 Ratio, Fits 7/16 in. Stud, Ford, 289, 302, 351W, Set 16

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