[Larry Navarro]

i ordered a set of those "PROFORM" SBford 1.6 ratio rockers this morning from tommy johnson jr. motorsports warehouse. the tech guy told me that the rockers are utilized by many circle track racers in the area, with excellent results, as these engines see high rpm duty for extended amounts of time.
TJJr.MW also sells a similar "severe duty" rocker rated to 10,000 rpm, recommended for radical roller cam profiles.
all the roller rockers come with a 1yr. warranty.
pretty good deal as far as race parts go.

[Larry Navarro]

two different SBford rockers....you must use the one designed for the "windsor" heads,(i.e. 289, 302, 351)
do NOT use the type for the canted valve "cleveland" heads,(i.e. BOSS302, 351 cleveland or 351M).

[Tom Vaught]

Skip,
The normal 1.62 or 1.65 Ford rockers are as Larry
said for the windsor type motors (289, 302, 351W)
The Cleveland type motors are the 351C, 351M, 429,
460, up to the 600 cid SVO motor. The Cleveland
motors use a rocker that is VERY close to the BB
Chevy rocker. (Fact is we stole the valve train
design as payback for the tunnel port rip-off on
the RAV motor). What could GM say!
Skip, the difference in the Pontiac vs SB Ford on
the valve side should be thousands of an inch in
difference, not something that you could see with
your eye. Sounds like you got a wrong rocker, I
agree with OMT. Tom V.

[ponchopete]

Larry Navarro,
Beware of the ProForm rocker arms. While there are lots of good Chinese speed parts out there, the overall quality control on ProForm rockers is very poor. There's a couple of things you want to look for when you get your rockers before you put them on your engine. The pressed in pushrod cup/oiler is frequently installed wrong on these rockers. Usually, the oil hole ends up being blocked off by the rocker body because the cup is installed twisted during assembly. Also, where the roller tip axle is inserted, check for damage around that area. It looks like someone put the axle in with a hammer. I have also seen some EXTREMELY sticky trunnions on these rockers. Also, while ProForm rates them to 10,000 RPM, these rockers do not cope well with copious amounts of spring pressure. If you're running a roller cam, count on the rocker bodies wearing out around the trunnions relatively quickly. I work in a speed shop, and we sell a LOT of these rockers (groan). I have seen these problems with these rockers on a frequent basis. Just wanted to warn you so you don't hurt any parts!

[tempest455]

Here is a comparison between my "cheap" Angus rockers and my "expensive" Crower rockers.

FWIW:

http://www.wauknet.com/douthitt/images/rockers1.JPG

[larry davis]

So what's everyone's opinion of the Scorpion brand of roller rockers? [img]/infopop/emoticons/icon_smile.gif[/img]

[Tom Vaught]

I agree, and where can you buy or look at one?
Tom V.

[BVR421]

Apparently Scorpion has changed thier marketing model. I had saved thier URL, scorpionperformance.com from when I was looking at ford rockers last year. They were on thier website for 160.00. Now when you try scorpionperformance.com it transfers you to EBAY Speciality Stores where the price is 210.00
Makes HarlandSharp look much better.

[Tom Vaught]

I have received some new info that says that the scorpion rockers are near the bottom of the list
of rockers and a rocker called yella terra is near
or at the top as far as quality, etc. Also, the
Yella terra rockers are used on the Holden and were specifically designed for the Holden which
uses the traditional pontiac 1.65 rocker design
specifications, so they should fit perfectly.
Tom V.

[larry davis]

So where does one find info. on the Yella Terras?

I'm trying the internet.

Any points of contacts, phone #s, Lat./Long.?

[larry davis]

Tom, where does Harland Sharps, Crane gold, & Comp. cams "red" rockers fall into that list?

[Skip Fix]

OMT Crower must have made a bad batch. This one has Ford etched on it and the naked eye can easily tell its shorter probabaly 0.100 minumum.I have a Comp BBF that is longer than the Pontiac and this one is way shorter.

If you want to see a really poor design get a Comp 1.8 SBC the pushrod cup is almost on the trunnion! I'd hate to be an engineer looking at all the angular vector forces going on there.

[JC455]

Pacific Performance- Ace sells Yella Terra stuff.

[Old Man Taylor]

Skip - My guess is that they just sent the wrong ones. Mine don't say Ford anywhere on them.

[Tom Vaught]

Larry and all,
I give credit to the gentleman below:

Tom,
I saw a comparison chart some time back of aluminium rockers. Nose weight, true ratio, failure load, ground or turned trunnions, trunnion size, roller size, warranty, etc were some of the things compared. Top of the heap were the Yella Terra rockers. Next best were Crane, I think, & the Scorpions were right down the bottom. The YT's have a lifetime warranty against breakage. Replaced free of charge if one breaks, no questions asked. You can also buy them individually. They are made in Australia for our 308 cu. in. V8 Holden engine, which uses 1.65 ratio stud mount rockers. They 308 valve train was copied from Pontiac in the late 60's, so the YT rockers will fit Pontiac. I had a set on my GTO & they are beautifully made & trouble free. I have a friend with a GTO that runs low 11's & has a set of YT's, that he has had for 20 years, on the engine!
I believe Ken Brewer, Pacific Pontiac Racing sells them.

Geoff, Australia"

Could you provide a copy of the list Geoff.

Larry, the coordinates are provided above, I went to the web site using google and found the place.
Tom V.

[Larry Navarro]

received those PROFORM 1.6 rockers today and was disappointed in the overall quality of the things.
they looked kinda cheap, the roller-tip axle looked like it was pressed in with a couple of blows using a hammer, the trunnion bearings seemed to fit slightly sloppy. don't want to take a chance with these.
i'm gonna send 'em back tomorrow.
for another $50 i'll get the Harland Sharps.

[Larry Navarro]

.

[ April 05, 2002: Message edited by: Larry Navarro ]</p>