PDA

View Full Version : why do you have to change valve springs on vortecs

SS10
09-06-2002, 12:56 PM
I am running my solid roller cam on stock springs stock 194 heads. what happens if you dont change the springs on the vortecs?
mommasboy
09-06-2002, 03:21 PM
Solid Roller? what lift? Sure it\'s not a hydraulic roller? I dont think you can run the stock spring with a solid unless its a low lift....under .500 but im not sure



But the spring change on the votec head the spring height is differnt too. So a different spring would be needed
ZZ4Blazer
09-07-2002, 01:21 AM
I dont\' believe that you can run over a .450 lift cam(not positive on the number) unless you have the heads machined.
SS10
09-09-2002, 08:25 AM
yes I am sure I have a solid roller cam and lifters bought them used so I dont know the lift or duration it seems to rev to 6k pretty easy I am also running a set of proform roller rockers half 1.5 half 1.6.
mommasboy
09-09-2002, 10:43 AM
Half 1.5 and half 1.6???????? Never heard of that being done. Are you running like the 1.6\'s on the intake and the 1.5\'s on the exhaust? That one has got me stumped buddy. Now i really dont know what to tell ya. http://www.s10v8.com/images/smilies/icon_confused.gif http://www.s10v8.com/images/smilies/icon_confused.gif
SS10
09-09-2002, 11:44 AM
The proform roller rockers come with 8 1.5s and 8 1.6s I am running the 1.6s on the exaust side
bohn333
09-09-2002, 11:45 AM
I\'ve heard of people doing that. Running half 1.5 and half 1.6, don\'t really know the advantage. I thought about doing that also. If anyone nows the advantage let me know...i\'m curious. And i believe vortecs won\'t hold a lift higher than 475. Scoggin dickey is big with vortec stuff. www.sdpc2000.com
ZZ4Blazer
09-09-2002, 01:16 PM
Why would you buy a used cam when you didn\'t know anything about it?
mommasboy
09-09-2002, 03:08 PM
very true......very
SS10
10-01-2002, 11:22 AM
Why would I buy a used cam? because I got the solid roller cam and lifters for $200 back to my question why do you have to change the springs in the vortec heads??? I am running fine on my stock springs in my 194 heads
knudsonm
10-01-2002, 11:39 AM
Because stock Vortec heads don\'t allow very much lift. You will have the locks and retainers ramming into the valve guides. You\'ll need to get them machined for more lift and while you are at it might as well machine the seats to a larger diameter for heavier springs. Scoggin-Dickie has them already machined and assembled for higher lift cams.
loweredd
10-06-2002, 08:21 AM
I have Vortecs, and I changed the springs. I have a comp roller, 480 488 lift. You will need to change the springs over stock. With more lift than that, you will need the spring pocket machined, and the top of the valve guide.
PursuitS10
10-13-2002, 08:57 AM
On 2002-09-09 14:43, Lightweight wrote:

Half 1.5 and half 1.6???????? Never heard of that being done. Are you running like the 1.6\'s on the intake and the 1.5\'s on the exhaust? That one has got me stumped buddy. Now i really dont know what to tell ya. http://www.s10v8.com/images/smilies/icon_confused.gif http://www.s10v8.com/images/smilies/icon_confused.gif



Thats nuthin on our race car one year we ran 12 1.5 rockers and 4 1.6 rockers. ON PURPOSE!

It ran better like that.