mrvedit

I'm trying to decide between the Comp 54-459-11 and 54-460-11 LSR cams, but am open to other suggestions too.
These LSR grind cams are:

54-459-11: 231/239 with 0.617/0.624 lift and 113LSA; .006 overlap is 58 degrees
54-460-11: 235/243 with 0.621/0.624 lift and 113LSA; .006 overlap is 62 degrees

I currently have swapped into my '81 Camaro:

LS2 6.0 with 243 ported heads; not milled
Patriot Extreme dual valve springs
Long tube headers with 3" exhaust; no cats
Edelbrock 4150-style EFI intake with 1000 cfm throttle body
(More power than original LS6 intake with 4" cold intake.)
No MAF, 42lb injectors
Yank SS3600 with 3.42 rear; Nitto 275/40-17 Drag Radials
4L65E trans built by me (I'm very active on the Transmission Forum.)

I currently have a custom Comp cam:
231/237 with 0.612/0.607 lift and 111 LSA

I tune it with a Wideband O2 sensor and HP Tuners. A Lambda of 1.16 and 26 degrees of advance gives the best trap speed.

3700 car (with me in it) consistent 12.05 at 115mph in 90F heat.
Shifting at 6900 RPM. (Which is 0.2 secs faster than shifting at 6500).
I estimate this at 450 Engine HP, which seems low for this combo, or does it sound right?
(I have checked compression, pulled the heads, installed LS7 lifters, logged each run for A/F ratio, etc.)

I drive it about 3000 miles/year on the street; I only need reasonable street manners.

I suspect my custom cam is hurting performance; for one thing its .006 overlap is a whooping 68 degrees, which is more than either Comp cam. This is related to its tight 110.9 LSA.

I have searched for and read the threads on these two cams. People seem to like both. The high lift is an issue, but I have dual valve springs and the heads have not been milled. I considered the milder 54-458-11 cam, but even with less duration it has the same lift. I understand LSR grinds are hard on the valve train, but I will replace it within 10,000 miles.

Question 1 - Should my current setup be giving me better performance?

Question 2 - Any thoughts on these or similar cams?

I like to experiment; currently I'm thinking 54-459-11 and plan to order within a few days.

Thanks.

mrvedit

Update - I decided on the 54-459-11 cam, but am now experiencing a rather tight intake PTV clearance of 0.070 as posted on this thread:

https://ls1tech.com/forums/generatio...l#post16866633

c6vettegfw

Hey bud I just bought the same cam for my 06 ls2 corvette. Are you saying it won't work for me

mrvedit

Well, its a year and a half later and I am very happy with the 54-459-11 cam. I've driven about 5000 miles on it and 30 drag strip runs shifting at 7000 rpm.
I actually measured a .057 PTV clearance, which is very tight. I do have dual valve springs which reduce the chance of float and piston-to-valve contact at high RPM.

Dyno Junkie

Using 54-459-11 in our crate LS3 and fitted 54-460-11 in a friends manual LS2.