valve spring / pushrod question

[vettandtyphoon]

hey guys i have a quick question

65,000 miles stock motor, i am upgrading my valve springs to a set of comp double valve springs.

should i upgrade the pushrods at the same time? does anybody know the stock length pushrod? and if anybody sells them hardened

thanks much

 

[we4Mateo]

If they are not bent, leave them alone.

 

[mikestertwo]

What springs are you putting on and why?

 

[just plain john]

Too much spring pressure will wipe the cam lobes. Are you talking about the Comp 980's?

 

[Dabigguy]

What springs are you putting on and why?

X2 !!! You really don't need double springs on these cars unless you have a roller cam and/or turn your engine 6000+ rpms. Heavier valve springs will wear your cam and can cause wiped lobes.

 

[vettandtyphoon]

i was told by gbodyparts.com to go with their comp 91lb double valve springs. no mods as of yet. do not plan on doing a cam, just basic bolt ons to get in the high 11's low 12's.

and then i was told if i go with a strong spring i will need stronger push rods because the spring will be too hard and cause the rods to bend.

 

[TurboDave]

They're not really "double" valve springs. Technically, they are a single spring with and intenal damper.

 

[Thumper]

I do not see where you would need to upgrade pushrods, a harder rod in a case like this (IMHO) might gain 1/10 of a horsepower, stock should suffice since you are only adding 6 lbs of spring pressure over stock.

Thanks
Bill

 

[vettandtyphoon]

slight mistake guys, it is a crane double valve spring. I am ordering it from gbodyparts.com. he told me that they would work great, he informed me that i do not have to upgrade my pushrods. but i figure for the cost of them why not upgrade them when they are coming out anyways.???? i always thought that when you upgrade your valve springs that since they are stronger they will apply more force to your pushrods hence maybe bending them?

Brand: Crane Cams
Product Line: Crane Double Valve Springs
Part Type: Valve Springs
Number of Springs Per Valve: Dual
Outside Diameter of Outer Spring (in): 1.212 in.
Coil Bind Height (in): 0.865 in.
Damper Spring Included: No
Spring Rate (lbs/in): 290 lbs./in.
Inside Diameter of Outer Spring (in): 0.900 in.
Inside Diameter of Inner Spring (in): 0.674 in.
Valve Spring Style: Standard
Coated: No
Quantity: Sold as a set of 12.

Valve Springs, Dual, 1.212 in. Outside Diameter, 290 lbs./in. Rate, 0.865 in. Coil Bind Height, Pair

 

[just plain john]

Those will be fine, as will the stock pushrods. Upgraded ones couldn't hurt, but aren't necessary.

 

[vettandtyphoon]

Those will be fine, as will the stock pushrods. Upgraded ones couldn't hurt, but aren't necessary.

thats all i needed to hear

 

[vettandtyphoon]

anybody know the stock pushrod length?

 

[bmackinnon]

stay with the stock pushrods in your case.... the valve springs you are ordering are basically stock replacements...(not a bad idea, and probably needed)... stock pushrods are fine with those springs.... clean 'em up and be done...save your money for something beneficial... new pushrods are not...:wink: