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Old Timer 50's and 60's Philosophy

This is a discussion on Old Timer 50's and 60's Philosophy within the Internal Engine forums, part of the LSx Technical Help Section category; I will embarss myself and go ahead and ask. If you have a low mileage engine with bolt-ons what damage ...

  1. #1
    Member 89LX's Avatar
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    Old Timer 50's and 60's Philosophy

    I will embarss myself and go ahead and ask. If you have a low mileage engine with bolt-ons what damage would it do to install a mild cam without new springs, etc;. The old 283 and 327 cranked out plenty of HP and compression and we swaped the cams out without a thought of toughening-up push rods, springs and the like. Some folks raced them at the track on occasion and the rest of us lopped around town and occasionally tore away from stop lights to impress. Give me your rational/thoughts
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    Grand Imperial Wizard Sarge's Avatar
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    Now your talking my "vintage".....a 3/4 cam ( Thats old school ) will serve you well as you described. That would be under .500 lift over would be called a full cam...match up your lift/duration with your heads and intake flow....tune it and go have some fun....

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    Pathelogical Liar BlackLT1Z28's Avatar
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    If you're going through the trouble of a cam swap, I say get a bigger cam. A smaller cam would almost seem not worth it to me. I understand where you're coming from with saving money on valvetrain components. But while you're in there, you might as well replace the factory stuff with better, stronger aftermarket stuff. But I do have a high-mileage engine, so I don't think like you low-mileage boys.

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    Member Orange SS's Avatar
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    stock LS1 springs are barely adequate for a stock cam much less a bigger one....

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    well dod what you want to do id put a bigger cam but its your car but either way definately get better push rods the stockers are crap

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    Senior Junior Member warpwr's Avatar
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    Seems to me that once you pull all the lifters, push rods, etc to replace the cam you might as well upgrade all that valve train stuff too.
    The hard part is the cam in and out itself, no?
    Screw the cost, put it on a credit card and transfer the balance to a zero interest. You'll save money in the long run possibly and you'll be worry free.

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    Junior Member Five-0's Avatar
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    Now remember...'bigger' does not always have to mean increased lift. I could have stayed with stock (LS2/LS6) springs with my cam....but chose the safety/reliability of the 918's. And I think I faired quite well In the hp/tq catagory. Im still not sold on all the hype of the super aggressive mondo lift cams. I agree with Sarge...do your homework and have fun.
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    Veteran 0rion's Avatar
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    You might be able to get away with it but have you ever seen what happens if you drop a valve? It's much more expensive than a set of new springs. Do youself a favor and ask the wife for more money. It's better to be safe than sorry.

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    Quote Originally Posted by warpwr View Post
    Seems to me that once you pull all the lifters, push rods, etc to replace the cam you might as well upgrade all that valve train stuff too.
    The hard part is the cam in and out itself, no?
    Screw the cost, put it on a credit card and transfer the balance to a zero interest. You'll save money in the long run possibly and you'll be worry free.
    On an LSx engine, lifters can only be removed if the heads are removed.

    I would say valve springs are a must, not like some of the old SBC days. The stock cams in these cars actually have pretty good lift/duration in comparison and it was the beehive valve spring that got GM there. The stock valve springs are "adequate" for the stock cam, and that's all.

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    Senior Member Street Lethal's Avatar
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    Quote Originally Posted by Five-0 View Post
    Im still not sold on all the hype of the super aggressive mondo lift cams...
    Ever driven in one....?

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    Junior Member Five-0's Avatar
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    Quote Originally Posted by Street Lethal View Post
    Ever driven in one....?
    Yes, several.
    And I stand pat.......I dont buy it...any more than the hype on synthetic oil.
    Its all about the almighty dollar. Give em what they want and charge em double.

  12. #12
    Senior Member Street Lethal's Avatar
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    Quote Originally Posted by Five-0 View Post
    Yes, several. And I stand pat.......I dont buy it...any more than the hype on synthetic oil. Its all about the almighty dollar. Give em what they want and charge em double.
    Symmetry is obviously very key though. More lift is always a good thing, provided that the rest of the cam's (and engine's) configuration is designed to work in harmony along with it....

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