Valve spring Question

**2000T/A Guru** · 05-24-2007, 01:17 PM

What lift are the yellow z06 valve springs rated up too?

**Mr. Luos** · 05-24-2007, 02:32 PM

I believe it was .550"...don't quote me though.

I would go with Comp 918's for a mild cam or a nice dual spring with an aggressive cam.

**belairtx55** · 05-25-2007, 09:18 AM

Mr. Lous,

what name brand would you suggest on the dual springs for the LS6 heads with an aggressive cam? I want to replace the lifters while the heads are off as well. I currently have the hardend push rods from comp cams to install. your thoughts suggestions?

**LS2Tuner** · 05-25-2007, 10:21 AM

Originally Posted by Mr. Luos

I believe it was .550"...don't quote me though.

I would go with Comp 918's for a mild cam or a nice dual spring with an aggressive cam.

I think your about right I was thinking .560 but then again there is a lot of variables. It will all depend on retainers and locks as to what the finale installed heighth is.

I would agree with the Comps will be a much better spring and will go right in with out cutting the spring pocket.

**Mr. Luos** · 05-26-2007, 05:01 AM

Originally Posted by Brian Hoeffler

Mr. Lous,

what name brand would you suggest on the dual springs for the LS6 heads with an aggressive cam? I want to replace the lifters while the heads are off as well. I currently have the hardend push rods from comp cams to install. your thoughts suggestions?

Manley
Patriot

Depending on lifters..you might need a different length pushrod. Should be able to easily sell the others though if that is the case.
How aggressive of a cam?

**jrgswhitels1** · 06-05-2007, 04:19 PM

Yellow units are .580 lift max zo6 springs, green springs are the .560 max lift!!

**jrgswhitels1** · 06-05-2007, 04:22 PM

If you dont pay attention to the colors,(they both look similar in color believe it or not!!)you could take home the wrong ones!!

**belairtx55** · 06-08-2007, 11:50 AM

Mr Lous,

I got the Blue set of springs from comp, the cam specs are 228/231-571/573@112 LSA. Well under the 600 mark. I should need to upgrade the lifters with this cam should I?

**jrgswhitels1** · 06-12-2007, 11:35 AM

I would if you have over 100,000 miles on the motor! Obviously for safety! Worn down/tired plungers will snap retainer and explode at high RPM. However, I have seen 4th. gens. run fair camshafts w/heavy lifts with stock lifters with roughly 125,000 miles on the clock!! I think your safe though with the stock lifters. Just depends on condition and wear of your ls1. If its a ticker in stock form, I would change them out, if not, save yourself alot of time and effort and just stab that new cam in there!!