LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Got the Cam... Now I got some questions...

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Old 01-30-2011, 05:54 PM
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Default Got the Cam... Now I got some questions...

I picked up a Hotcam today, came with Lt4 springs, Locks, and retainers...

Is there anyway to tell if they are LT4 springs, they came in a Ziploc bag, not a GM box, LOL..

Also, How long do you think it will take to do this cam swap on Jack Stands?
Old 01-30-2011, 06:07 PM
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have the springs checked for pressure at installed height and at cam lift. Any respectable engine/machine shop should be able to do it pretty cheap. I wish i could tell you a way to just look at them and see if they would work, but when you buy used parts its always safer to assume the worst and make sure they will work before you just throw them in.
Old 01-30-2011, 06:21 PM
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the lt4 springs had a green paint stripe. i wouldnt go just by the stripe though if your not sure. other then that there is no way to tell without testing it like said above.


Time depends on your mechanical ability or if you know what your doing. And if everything goes smoothly. It can be done in a weekend.
Old 01-30-2011, 06:21 PM
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Originally Posted by wysemunky
have the springs checked for pressure at installed height and at cam lift. Any respectable engine/machine shop should be able to do it pretty cheap. I wish i could tell you a way to just look at them and see if they would work, but when you buy used parts its always safer to assume the worst and make sure they will work before you just throw them in.
True, I keep being told to get 1.7rr and new valve springs that can handle 1.7rr...

I probably will, how much do you think I could get for LT4 valve springs?
Old 01-30-2011, 07:52 PM
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I think LT4 springs are only like $35 new and marginal for a HOT cam anyway. The real LT4 came with much lighter valves than the LT1 which made them OK with those heads and that cam.
Old 01-30-2011, 10:39 PM
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Originally Posted by 96capricemgr
I think LT4 springs are only like $35 new and marginal for a HOT cam anyway. The real LT4 came with much lighter valves than the LT1 which made them OK with those heads and that cam.
Can I use them tho?

I figure since its such a small cam, I could just keep the stock lifters, get the valves springs checked at a machine shop, get 1.6rr, and use the stock pushrods, its a pretty small cam, and i'm on a pretty small budget, so I feel like it all works out.
Old 01-30-2011, 10:55 PM
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Stock lifters are just fine with a LOT more cam than this. People just blindly recommend replacing them because the cost of replacing them came down a few years ago.

The LT4 springs are marginal for the HOT cam on LT1 heads, not going to break or anything like that but after some miles(your's are unknown) they can get a little soft and allow some valve float which would be a loss of high rpm power.

A HUGE number of folks run them just like you want to without any trouble.
Old 01-30-2011, 11:29 PM
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Originally Posted by 96capricemgr
Stock lifters are just fine with a LOT more cam than this. People just blindly recommend replacing them because the cost of replacing them came down a few years ago.

The LT4 springs are marginal for the HOT cam on LT1 heads, not going to break or anything like that but after some miles(your's are unknown) they can get a little soft and allow some valve float which would be a loss of high rpm power.

A HUGE number of folks run them just like you want to without any trouble.
Miles on the car are about 125,xxx..

Miles on cam set up, I was told about 5,xxx...
Old 01-31-2011, 05:27 PM
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Originally Posted by SpeedFreak123
Miles on the car are about 125,xxx..

Miles on cam set up, I was told about 5,xxx...
Can I ask who you bought it from? My friend just sold his used kit with 5k miles on it
Old 01-31-2011, 06:42 PM
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His name is Alan, he lives in new jersey.
Old 01-31-2011, 08:24 PM
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Originally Posted by SpeedFreak123
His name is Alan, he lives in new jersey.
Nevermind lol. Thought maybe it was a coincidence
Old 01-31-2011, 08:34 PM
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Originally Posted by l 95 Trans Am l
Nevermind lol. Thought maybe it was a coincidence
LOL. Guess not
Old 01-31-2011, 08:46 PM
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you'll be better off with these budget spings
http://www.alexsparts.com/products/C...%26-Cups..html
Old 01-31-2011, 08:56 PM
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Originally Posted by defaultexistence
you'll be better off with these budget spings
http://www.alexsparts.com/products/C...%26-Cups..html
Any experience with those?
Old 01-31-2011, 08:58 PM
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I have that kit for 75 shipped

Just sayin
Old 01-31-2011, 09:07 PM
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Originally Posted by Lawhead
I have that kit for 75 shipped

Just sayin
Used? Why didnt you mention that last night through our PM's!!! LOL
Old 01-31-2011, 09:10 PM
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I offered you Springs, 1.7 Rockers, Guide plates and Studs everything you needed for 400 I would go down to 350

Brand new still in all the plastic with spring specs on em and everything took one out to look but then car went and ya you guys know the rest :/
Old 01-31-2011, 09:13 PM
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Originally Posted by Lawhead
I offered you Springs, 1.7 Rockers, Guide plates and Studs everything you needed for 400 I would go down to 350

Brand new still in all the plastic with spring specs on em and everything took one out to look but then car went and ya you guys know the rest :/
Cant swing the 350...


Might be able to do the 75 tho
Old 01-31-2011, 09:17 PM
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so if i go with that kit... What valve seals are recommended? and... I can use SA 1.7RR's with these and stock pushrods, correct???
Old 01-31-2011, 09:43 PM
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Well PM if you want to do that.

But not sure on the 1.7 self aligning though


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