spoolin51

I need to buy stiffer valve springs for my project.
I was looking on LR and their racing spring set is 375.
Is there anyone else out there that sells race valve springs?

Thanks guys.....

gt37vgt

well you can get generic ones but you must know all the details to choose them your cylinder head man should be able to get them. and remember it takes Horsepower to compress those springs I would want some first hand accounts of valve bounce before going very hard

spoolin51

Thats true. So would 140# be to much? In an older thread I read the stock valve springs weaken quickly and are 80# springs

gt37vgt

i will believe nothing until someone tells of a first hand account of valve bounce .
or some one at least tells me they have done the calculations with the max valve acceleration's and mases
it seems to make more sense to lighten the valve chain than to increase the spring rate .

gt37vgt

i will believe nothing until someone tells of a first hand account of valve bounce .
or some one at least tells me they have done the calculations with the max valve acceleration's and mases
it seems to make more sense to lighten the valve chain than to increase the spring rate .

fast951

We offer performance valve springs. I already emailed you the details a while back.

gt37vgt

test your old ones on the test rig that your the head man has you can compare that to stock and what ever john is offering you can then make an informed decision and tell us what they come up as. and confirm or destroy the rumor of them softening .If they were with in factory spec i would shim them for 15% more seat pressure and work out travel to coil bind and get chev light valves and retainers . But i am an extream tight ****

Mike Lindsey

Porsche springs degrade in rate very quickly. We have seen then drop from 130# to 120# in 300 miles and have measured factory springs coming off used heads as low as 100 to 110. Anybody who disagrees with that doesn't have any real experience with the springs. If Porsche put 130 pounds springs in the car for 12 psi of boost and 6400 RPM, you might think about adding a little more for additional boost and RPM. We don't like running more then #140 on a hydraulic lifter. Shimming the factory springs for 15% more spring pressure is a guarantee of coil bind since the are not to far from that in stock form. If you adding a cam, then most likely you can't use the stock springs and need something that will allow for the extra lift. Yes, extra springs require HP to compress them, but that may be better then floating valves, tearing up lifters and cams and coil bind issues. We have sold tons of valve springs and we have had a good history with ours, which is what you should be looking for on
something as important.

gt37vgt

thanks for some real facts and numbers Mike so there is it 140 is just a bit more and suitable for most hydraulic cams .

reno808

I brought stiffer springs from (CEP) Evil944t and ti retainers as well. He would be able to get springs for you setup. I can PM you his number if you want.

spoolin51

Thanks for the help everyone... Ive got the information that I needed to help make a better decision

nick_968

I just took a set of Lindsey springs with Titanium Retainers and Lindsey Platforms off my cam tower (bought 2 years ago) as I had to replace them with a set of Milledge springs and retainers that were matched to my new Milledge Cam if you want them they are yours for $250 plus shipping. They were on the car for 3000 miles, 1000 of which was running in my brand new engine and the rest just gentle road use and light testing as I still have not finished the car how I would like it yet. I am not sure on the poundage from memory but they worked fine with the hydraulic lifters.

TurboTommy

On the topic of: ït takes horsepower to compress the heavier springs''
Yes, I guess its harder for the cam lobe to turn to open the valve, but when the lobe is past half way (when the valve is ready to close) wouldn't the heavier spring pressure also push the cam lobe away, actually making the camshaft turn easier at that point; somewhat offsetting the extra load?
Just a crazy thought; tell me if I'm on crack, or what.

spoolin51

PM sent
Actually, my machine shop told me the exact same thing...so you probably have a valid point
But you still need to put the pipe down

gt37vgt

tommy at some rev ranges yes but at others all the spring is used overcoming the inertia of the valve assembly