dame28

I have a LS 5.3L engine and I want to put a SLP Performance camshaft in it. The cam has a Advertised Duration 273/278, Lift .591/.600 do I have to change anything besides the springs to install this cam and have it work correctly.

88FormulaKiller

iTrader: (8)

What casting # heads are on the 5.3? Depending on the casting, you may or may not have stock springs that accomodate the lift. Call SLP or check the site your looking to purchase from and see what is recommended. Or you can google search max lift for the stock springs that came on your #XXX heads and compare. Or, if you dont know if they are original, throw some used beehives on there, can find a low mileage used set cheap over on LS1tech.

Podium

iTrader: (2)

I would never use stock springs on a high lift cam. Besides, the stock valves springs wouldn't handle. 600 lift anyway.

Podium

iTrader: (2)

Don't buy used springs. Stock style beehive springs are only 140-180 brand new.

88FormulaKiller

iTrader: (8)

Podium your missing my point and the question asked, he asked what needed to be changed and im giving a direct answer and trying to get direct information. I asked what 5.3 for a reason, if it happens to be an L33, it has LS6 heads (minus the sodium valves blah blah) and in which case will accomodate the cam, it would be his decision to buy new springs, which yes i recommend, but isnt necessary depending on the condition/mileage/etc. Check texas speed for confirmation or any other site that sells LS6/LS2 cams with .591-.600 lift. LM7 of course wont work since none came with those heads.

Podium

iTrader: (2)

You said depending on the casting it will accomodate he lift. It will not .Stock ls6 springs will not work with that cam. They are only rated to. 560-.570 lift. Stock ls2 cam is. 525 lift and the ls6 is. 550.

Op it would be wise to get aftermarket push rods as well.

88FormulaKiller

iTrader: (8)

Go research 799 heads, max lift. Stock rockers and springs can handle to .600 lift. Im not saying it is ideal but also not unreasonable. All set aside I'd buy a camshaft kit with springs retainers and rods.... but thats not what was asked. Done.

Podium

iTrader: (2)

Can you find me the link? I just looked and found nothing. The stock rockers will handle almost any cam. I was under the impression the 799s used the same as the 243s, the ls6 spring.

88FormulaKiller

iTrader: (8)

the link? no link, search..my L33 came with the 799's which replaced the 243's, when it came cam time i simply searched 799 max lift on different LS forums and found i could run up to a .600 lift cam, safely. Besides, almost every vendor that sells LS cams (reputable ones anyway) will always have disclaimers about replacing the springs when running a camshaft that has a lift the stockers cannot handle. TS's SLP camshaft has no mention of that, i actually called them yesterday to ask similar questions about potential camshafts for the 6.0/6.2 in my 1st gen but im too impatient with their hold times.

Podium

iTrader: (2)

Find the link that's show what the stock 799 springs support. 600 lift. Not only will the springs not support the lift, thy need to be strong enough to support the more aggressive ramp rate of an aftermarket cam. I would like to see facts, not what some internet mechanic says. I'm not doubting you, I would just like to see evidence that stock springs will support. 600 lift. Like I said, as far as I know , they came with ls6 springs

88FormulaKiller

iTrader: (8)

sorry but im not taking time out of my day anymore to search for things someone else has the ability to do on a forum like LS1tech, i will however trade.... my time for your time. post some pics of that 460 Rwhp h/c engine you had and ill find a link or two.

Podium

iTrader: (2)

If your telling the op he can run that cam with stock springs you should be able to back that up. I posted u what I know and backed it u with out "hear say". You should do the same. What happens if the op runs that cam and his valvetrain lets go? You going to replace it?

My 460 rwhp motor wasn't built with stock springs so it doesn't need to clutter up this thread more than it has been

86White_T/A305

I wouldnt doubt stock springs can handle 600 aswell..but exactly as Podium mentioned..hey wont like an aggressive ramp rate.Its also good idea to go to a hardened pushrod at the same time.

Op while your in there for a cam swap..be prepared to think about doing other upgrades or atleast make sure things like oil pump,timing set are in good shape.What made you choose that cam and what power are you trying to gain? if you are worried about changing valve train parts and dont want to mess with that..they're many other cam choices out there or custom cam that will suit your needs.Id call up SLP or texas speed...thunder racing etc for more information.Custom cams dont cost more than off the shelf either.

243/799 are the same head but different casting process.I dont recall at the moment which cars had the lights valves and better springs..but thats minor detail if you going to upgrade them anyway.

1nasty86

iTrader: (5)

02-04 ls6 cars had the best 243 heads..... a set of Brian tooleys dual springs would be a good upgrade over ANY single beehive spring... they are 219.00$ or I can you a better deal than that... just shoot me a pm if interested

dame28

I am looking to get around 400+ hp. I was going to get that cam because i figured it wouldn't require much more than springs, locks, and retainer.

dame28

706 heads