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-   Stock and Super Stock Tech (https://classracer.com/classforum/forumdisplay.php?f=4)
-   -   Super Stock Hemi Head Tech (https://classracer.com/classforum/showthread.php?t=87002)

ppmracing 04-09-2024 11:45 PM
Re: Super Stock Hemi Head Tech
 
Is it legal with Hollow steam valves ???

Dyno 04-10-2024 09:46 PM
Re: Super Stock Hemi Head Tech
 
Hemi valves are 5/16, not much to take out of the stem. I do not think anyone makes or uses them, could be wrong!

James Hensler 04-11-2024 06:11 PM
Re: Super Stock Hemi Head Tech
 
Dan didn’t Barton try sodium filled at one point?

ppmracing 04-11-2024 07:55 PM
Re: Super Stock Hemi Head Tech
 
Darrin Morgan is saying in the video, that it is a Hollow steam valve the are using, to save weight.

Rick J 04-11-2024 10:13 PM
Re: Super Stock Hemi Head Tech
 
Hollow stem valves have been used in super stock, and stock for a long time.

James Hensler 04-12-2024 07:54 AM
Re: Super Stock Hemi Head Tech
 
Yeah I get that but we are now spinning these thing 9600-10000 rpm’s and the head is still big and heavy. We have figured out the bearings and oiling but the last 10 or so blow ups have been broken valves

Dyno 04-12-2024 09:39 AM
Re: Super Stock Hemi Head Tech
 
Quote:
Originally Posted by Rick J (Post 695997)
Hollow stem valves have been used in super stock, and stock for a long time.
In 3/8 or 11/32, not enough material in a 5/16 stem.

Rick J 04-12-2024 10:21 AM
Re: Super Stock Hemi Head Tech
 
Quote:
Originally Posted by Dyno (Post 696011)
In 3/8 or 11/32, not enough material in a 5/16 stem.
Sure, 5/16 and
7mm are pretty common

ppmracing 04-12-2024 06:29 PM
Re: Super Stock Hemi Head Tech
 
Quote:
Originally Posted by Rick J (Post 695997)
Hollow stem valves have been used in super stock, and stock for a long time.
Dosent means its leagle !!

gearhead63 04-14-2024 07:55 AM
Re: Super Stock Hemi Head Tech
 
The rulebook says . Any aftermarket
steel valve permitted; must maintain stock head and stem size;=hollow steam valves allowed.


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