Z06FRC

I have a 99 vette that will run a vortech supercharger and I'm trying to make a decision between the LS6 or the XR265HR camshafts. Keep in mine that I'm not swapping the heads they will remain stock, it's just a cam swap it'll be doing. Is it worth the extra money to get something alittle better then the LS6? Also can I run 02-04 LS6 Valvesprings with the XR265HR camshaft?

XR265HR Cam Spec:

Cam Style: Hydraulic roller tappet
Basic Operating RPM Range: 1,500-6,800 RPM
Intake Duration at 050 inch Lift: 212
Exhaust Duration at 050 inch Lift: 218
Duration at 050 inch Lift: 212 int./218 exh.
Advertised Intake Duration: 265
Advertised Exhaust Duration: 271
Advertised Duration: 265 int./271 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.558 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.563 in.
Valve Lift with Factory Rocker Arm Ratio: 0.558 int./0.563 exh. lift
Lobe Separation (degrees): 115

LS6 Cam Specs:

Cam Style: Hydraulic roller tappet
Basic Operating RPM Range: 1,500-5,200
Intake Duration at 050 inch Lift: 204
Exhaust Duration at 050 inch Lift: 218
Duration at 050 inch Lift: 204 int./218 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.550 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.550 in.
Valve Lift with Factory Rocker Arm Ratio: 0.550 int./0.550 exh. lift
Lobe Separation (degrees): 117

N4cer

I don't think so. I think the LS6 springs are pretty well maxed out on the LS6 cam.

98vettedave

The yellow 2002 - 2004 LS6 springs will work on the XR265HR high lift cam with no problem.I once ran a combo with the XR277HR .534 .539 and 1.8 rocker arms (.564 .569) with the 2002 LS6 springs and never had any trouble.

If I were making a cam swap...more duration like the XR275HR high lift would be my choose.The XR265HR high lift doesn't really do much for improving performance over the LS6 cam.The XR275HR (Comp could grind a 115 LS)and it is still a small cam,but you will see a nice gain in power over the LS6 cam.

N4cer

Spinning it to what RPMs though?

Wicked C5

I just did a heads/cam swap I wouldn't use the LS6 valve springs in a boosted application. You can get some top end valve float with stock Ls1 or LS6 springs. Spend a few extra $$$ and buy patriot golds or something like them.

As far as the cam goes I was going to do a LS6 cam until my shop told me they had a low mile 223/228 on a 116lsa for great price. If you can get lucky pick up a bigger cam but the LS6 cam for around $100.00 is a great bang for the buck and would not spend the extra $250.00 for a new one I would use that money for the valve springs. Make sure you upgrade to a ported LS6 oil pump,Ls2 timing chain while your in there it's cheap insurance.

98vettedave

My shift light(pill)was set at 6800 rpm...never had any valve float.The stock 02 thru 04 LS6 red lines at 6500.This thread is can I use LS6 02 - 04 springs."Not" are there better springs available". My set up was with the LS6 heads (hollow & sodium filled valves) with Ti retainers.The valve train was very light weight and stable.