Valve spring Question
Thread Starter
Intermediate
Joined: Dec 2005
Posts: 36
Likes: 0
From: Kingsville Texas
Valve spring Question
I am pieceing together a LT4 up grade for my 95 lt1. I have the lt4 intake, heads and 1.6 rockers When using a Hot cam will I need to change the valve springs or will the stock LT4 springs work with this cam and rocker combo? Thanks
Drifting
Joined: Oct 2006
Posts: 1,554
Likes: 13
From: Romeoville IL
Originally Posted by STL94LT1
Yes, the LT4 springs will work. But, while you have things apart you may want to upgrade the springs.
I'm a big fan of not doing the same work twice. It would suck to tear it all apart just to do it again.
Melting Slicks
Joined: Dec 2004
Posts: 2,137
Likes: 5
From: Howard PA
Crane Cams 99845-16 is what I used after many discussions with many knowledgeable members here. They have a much better rate and seat pressure than the stock LT4 springs, plus they'll allow for almost .600 lift at stock installed height.
Normally I'd like to go with a damper but it just won't fit the stock locators so don't buy the 99846-16 set thinking you can get a damper, it won't work.
I've been running these for a while now with the Hot Cam and have no trouble, they fit the stock LT4 retainers and locators like glove.
http://cranecams.com/index.php?show=...&lvl=3&prt=122
The other alternative is to use a beehive spring, I'm not a big fan of those so I didn't even research them.
Normally I'd like to go with a damper but it just won't fit the stock locators so don't buy the 99846-16 set thinking you can get a damper, it won't work.
I've been running these for a while now with the Hot Cam and have no trouble, they fit the stock LT4 retainers and locators like glove.
http://cranecams.com/index.php?show=...&lvl=3&prt=122
The other alternative is to use a beehive spring, I'm not a big fan of those so I didn't even research them.
Last edited by ALLT4; Nov 1, 2006 at 07:47 PM.
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
I use the Bee Hive springs and love them.I have other racers that use them, with my suggestion.
Not a problem in 4 years.
You will have to use a diff spring remover for the smaller retainers to install.
Not a problem in 4 years.
You will have to use a diff spring remover for the smaller retainers to install.
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
I'm also a fan of the beehives. They're versatile, their small retainers are very light and there should be no clearance issues with any type of rocker arm. Why would anyone use a spring with a capability of .600 lift with the Hotcam? Running excessively more spring pressure than is required wastes HP and causes accelerated wear of the valvetrain.
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Melting Slicks
Joined: Dec 2004
Posts: 2,137
Likes: 5
From: Howard PA
Originally Posted by Corvette Kid
Why would anyone use a spring with a capability of .600 lift with the Hotcam? Running excessively more spring pressure than is required wastes HP and causes accelerated wear of the valvetrain.
I doubt you waste any horsepower, if there is a loss it's probably minimal with a full roller valve train. Plus valve float is a non issue.
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Originally Posted by Corvette Kid
Why would anyone use a spring with a capability of .600 lift with the Hotcam? Running excessively more spring pressure than is required wastes HP and causes accelerated wear of the valvetrain.
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,008
From: Texas
[QUOTE=Corvette KidWhy would anyone use a spring with a capability of .600 lift with the Hotcam? Running excessively more spring pressure than is required wastes HP and causes accelerated wear of the valvetrain.[/QUOTE]
Just because the spring supports greater lift doesn't mean the open or closed pressures are higher. In fact the beehives are typically less than conventional springs.
Just because the spring supports greater lift doesn't mean the open or closed pressures are higher. In fact the beehives are typically less than conventional springs.
Racer
Joined: Feb 2005
Posts: 278
Likes: 4
From: Havre de Grace, Maryland
Originally Posted by REDC4CORVETTE
I use the Bee Hive springs and love them.I have other racers that use them, with my suggestion.
Not a problem in 4 years.
You will have to use a diff spring remover for the smaller retainers to install.
Not a problem in 4 years.
You will have to use a diff spring remover for the smaller retainers to install.
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
The two choices for these in Comp's springs are the 26915 and the 26918. Check their spring chart on their website as to which one will work best for you. It's a font of good info. 