Max lift for 100K mile longevity
Yep 100k on the same beehives and it was abused...and abused...and abused!! The only reason it stopped there was because it spun a rod bearing. Cam looked good when it was pulled but went with a stroker and bigger cam.
I guess I could be wrong but I would think the amount you compress the spring would be harder on it than how fast it happens. I dont know how fast the ls7 valves open but I would think they open pretty quick with 1.8 rockers..and they have .590 lift right.
Teching In
Joined: May 2013
Posts: 45
Likes: 0
Is that because of the beehives or simply because of aftermarket steel springs? I would think a decent aftermarket dual steel spring would be able to handle a 224 or 228 cam pretty easily for a long time.
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Brett Foote
Joined: Jul 2007
Posts: 1,500
Likes: 177
From: ELSA, South TEXAS (956) 802-7700
Definately!
The cam I was going to use has more lift but less duration. It’s a lunatic voodoo 217/223 .549/.549 lsa113, but I started to wonder if I could get away with the EPS truck torque 2 or something similar.
Great information on valvespring maintenance. That is plenty doable if it keeps the motor alive.
I had heard great things about VR1 but I already bought some Rotella T-6. Any idea where that falls on the cushion chart?
The cam I was going to use has more lift but less duration. It’s a lunatic voodoo 217/223 .549/.549 lsa113, but I started to wonder if I could get away with the EPS truck torque 2 or something similar.
Great information on valvespring maintenance. That is plenty doable if it keeps the motor alive.
I had heard great things about VR1 but I already bought some Rotella T-6. Any idea where that falls on the cushion chart?
LS7 still has mild lobes. It also has about as much lift as an XE-R camshaft. Guess which one is warrantied to last 60k miles?
.550 to .600 XE-R, LXL, LSL 11/32 push rods, PAC 1218 springs, check and/or replace at 30K or yearly whichever comes first.
I think I'll just go ahead and do the Pat G cam recommendation and see what he comes up with. I wonder if he will recommend the other valvetrain components as well?
Patrick G came back with this cam recommendation.
220/226 .604”/.604” 113 LSA +2 advance (with 1.7 ratio rockers)
using EPS HiRev lobes.
Recommended valve springs: PAC 1218 or 1518 beehive.
It's just a little bigger than I was originally thinking. I'm just going to go with this and see how it turns out.
220/226 .604”/.604” 113 LSA +2 advance (with 1.7 ratio rockers)
using EPS HiRev lobes.
Recommended valve springs: PAC 1218 or 1518 beehive.
It's just a little bigger than I was originally thinking. I'm just going to go with this and see how it turns out.
TECH Senior Member
Joined: Feb 2009
Posts: 5,445
Likes: 4
will a GM ASA cam live for 100k with stock GM springs ?Damian has a good cam that was easy on springs ,and it made great power.you would need comp 918 springs.maybe use stock rockers with trunnion upgrade bearings.
Didn't break a spring does NOT mean it was still working right..........................
Ok,
Stock will go 100k +
However, if you are doing all this to your car it is the name of the game to have to replace components that wear.. Springs, especially dual sets will wear out around 15-20k depending on lobes/use. For the price of springs why would you want to run them until they could potentially break. A set of BTR springs are around $219-300 on average. Why would you want to cost yourself a motor over trying to get by with not spending money on replacing crucial parts. Sure you can run some beehives further but why would you want to sacrifice power/cam choice based on a set of $250 valve springs.
Even if they are not broke, they still "wear" out. Just my opinion, take it how you want.
Stock will go 100k +
However, if you are doing all this to your car it is the name of the game to have to replace components that wear.. Springs, especially dual sets will wear out around 15-20k depending on lobes/use. For the price of springs why would you want to run them until they could potentially break. A set of BTR springs are around $219-300 on average. Why would you want to cost yourself a motor over trying to get by with not spending money on replacing crucial parts. Sure you can run some beehives further but why would you want to sacrifice power/cam choice based on a set of $250 valve springs.
Even if they are not broke, they still "wear" out. Just my opinion, take it how you want.
Last edited by SNLPerformance; May 22, 2013 at 04:18 PM.
TECH Enthusiast
Joined: May 2010
Posts: 558
Likes: 1
From now on, I'm going to change my springs every 30-40k.