LT4 Valve Springs
Thread Starter
Racer
Joined: Sep 2004
Posts: 363
Likes: 0
From: Granville Illinois
LT4 Valve Springs
I have a LT4 in my 96 Vette. I am wanting to change to a larger cam...without getting radical. What is the limits that the stock LT4 valve springs can take....could I slip a LT4 hotcam in and keep my stock springs?
Safety Car
Joined: Dec 2006
Posts: 4,290
Likes: 6
From: St Marys GA
I think the stock springs can take the Hotcam. However, it's always best to play it safe. I'm planning on upgrading to a CC503 this summer, and going with some higher rate springs just to stay on the safe side.
Burning Brakes
Joined: Sep 2003
Posts: 1,214
Likes: 0
From: Miami FL
The Hot Cam kit comes with LT4 springs, so you should be ok. I did an LT4 top end and ordered the Hot Cam kit...since the Heads already where complete when I bought them new...I ended up with an extra set of LT4 springs...
Thread Starter
Racer
Joined: Sep 2004
Posts: 363
Likes: 0
From: Granville Illinois
Just wanted to make sure that the springs in the hotcam kit were not upgrades like the cam...it just seems stupid that Gm wouldn't have put the Hotcam in at the factory....but then it has more power than the LS1 and you can't out do the new motor in the new body style!
Advanced
Joined: Jul 2004
Posts: 83
Likes: 0
From: Orlando Fl
Keep in mind that lift is not the only consideration. Some cams have more aggressive ramp rates and although the lift is under a certain limit, the lobes are too radical for the spring.
Also, keep in mind that the LT4 heads used lighter valves than the LT1, so less weight for the spring to control. Heavier valves will require a stiffer spring all things equal.
Also, keep in mind that the LT4 heads used lighter valves than the LT1, so less weight for the spring to control. Heavier valves will require a stiffer spring all things equal.
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