hcb1700

iTrader: (9)

What is the biggest cam that can be used on a 5.3 LM7 engine without changing out the springs? What are my options? Are the springs on the stock heads the same as LS1 heads, or are they different?

2000TransAmWS6

iTrader: (12)

the biggest cam you can put in your 5.3 without changing springs is a stock cam from a 98-00 LS1.

nastychevelle

iTrader: (7)

just buy ls6 springs they are good to like .585 lift or something like that and they are like 65 bucks

1nasty86

iTrader: (63)

i thought the ls6 springs were rated max at .550. but a ls6 cam goes good for a boosted 5.3. otherwise id bite the bullet and get you a set of 918s and get a 220 or 224

hammertime

iTrader: (1)

Any performance cam is going to open and close the valves faster, and probably extend the RPM range well beyond the range of the stockers. Even cams that work with LS6 springs are pretty tame.

Limiting your choices to stock springs is limiting your performance to meager improvments, and only as long as you can maintain valve control. You might lose bottom end, only to gain in the mid-range, then lose again up top once you overwhelm the springs.

hcb1700

iTrader: (9)

I was thinking about the LS6 springs since they are only like $60. So the LS1 cam will work with the stock LM7 springs? I'm thinking about doing that for now and later on installing something else.