Rockers on Vortechs ?

L

Lynn D. Brown

New member
Hey Vortech Head guys :

Chris Conley is having trouble getting the narrow Crane Gold 1.6 Roller Rockers to fit onto the valve stems of my Vortech heads. I thought that this was a common combination that alot of guys had used successfully ?

What Roller or even non-Roller Rockers have U guys seen that install successfully on the Vortechs ?

Something weird going on.
 
S

Sy769

Donating Member
You have to change the rocker stud. It will have a 3/8 top and a 10mm bottom thread. ARP makes them now and they should be lots cheaper. The Crane set is very expensive.
 
Falco

Falco

Donating Member
Sy769 said:
You have to change the rocker stud. It will have a 3/8 top and a 10mm bottom thread. ARP makes them now and they should be lots cheaper. The Crane set is very expensive.
Click to expand...

Yep. The funny thing that I bought a set from Crane and it has ARP stamped into them. :x

Later,
 
Windedv6

Windedv6

Ty n 10s
Lynn

The 2003 vortecs are setup like the ls1 valve train. The rockers set in a cradle. Less strain on the rest of the valve train components. I am using this and so far really like it. This was recommed by my head builder. I was talked out of using my 1.6rr that I had on my previous build. I also was able to talk to the GM developer of these and the head design of the vortecs. He convinced me to to go this route. They are 1.5s.



Latest Vortec GM rocker setup - photo #1

Latest Vortec GM rocker setup - photo #2

John
 
L

Lynn D. Brown

New member
Rockers on Vortechs

Rockers on Vortechs

Guys,

I just got my question answered - Conley talked to McCoys' mechanical man. I bought these Vortechs about a year ago from ATR, so they were made by Jerry Mc sometime before this.

Well, I guess Jerrys' Mfg method at that time involved using a certain tall valve keeper in order to get equal valve spring heights. Apparently these keepers stick up enuf to interfere w the containment washers on each end of the narrow Rollers on the self aligning Crane Gold rockers.

Jerry has since modified his assembly procedure and can now use normal, shorter keepers which don't interfere w the Crane self guided Roller Rocker washers.

So, I guess we will have to return the Rockers to ATR - I can hear the squealing now - and get a different type - probably not self-aligning.
 
9

93ty475

Donating Member
Re: Rockers on Vortechs ?

Windedv6 said:
Lynn

The 2003 vortecs are setup like the ls1 valve train. The rockers set in a cradle. Less strain on the rest of the valve train components. I am using this and so far really like it. This was recommed by my head builder. I was talked out of using my 1.6rr that I had on my previous build. I also was able to talk to the GM developer of these and the head design of the vortecs. He convinced me to to go this route. They are 1.5s.

John
Click to expand...


I like this idea alot.... do you still have the pics John? seems like this would make for a quieter motor as well.....did you guys do larger valves and different springs or just clean up and use all stock stuff?

thanks,
 
jwaller

jwaller

Evil Genius/SyTy Guru
Re: Rockers on Vortechs ?

with john's type rocker setup the rocker bolt hole is yet another size.
it's even smaller than they were before, so you have to have heads that were meant to use that setup. you cant just bolt that setup onto a 96-2000 head.
it's got to be a 2001 and up style head for the bolt sizes to work out.
I believe they are 8mm instead of the reg vortec being 10mm.
 
Windedv6

Windedv6

Ty n 10s
Re: Rockers on Vortechs ?

copy-640-480-2002616135651-1-Dsc00007.jpg


Waller is correct...

John
 
C

Crimson93Ty

PITA new guy
Re: Rockers on Vortechs ?

John,
Do you know if that head is on all 2003 and up 4.3 liter models? Did you take any pics of the casting number on those(if it makes a difference)?
I'll try to see if I can find something that has the heads,rockers,and pushrods and everything so it's all matched up. Just want to be sure what I'm looking for.
 
9

93ty475

Donating Member
Re: Rockers on Vortechs ?

10-4 Waller....Thanks for the pic Gerber....I'll start hunting down a set of these heads for my next vortec conversion.....
 
jwaller

jwaller

Evil Genius/SyTy Guru
Re: Rockers on Vortechs ?

flow and everything else is pretty much the same although they did delete a little bump that was by the bottom of the hole that is the intake rocker studs.

I believe all the 03 maybe 04 and up's are this way. I haven't seen any that aren't but I can be wrong.
 
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