LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Too much spring for a cam?

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Old 05-17-2004, 08:24 PM
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Too much spring for a cam?

Can you have to large of springs for a cam?
like would you lose power by using a really strong spring if your cam doesn need it?
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Old 05-17-2004, 08:54 PM
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Yes some will be lost but not much. How close of a gap is there?
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Old 05-18-2004, 01:06 PM
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Originally posted by Red_94Formula
Yes some will be lost but not much. How close of a gap is there?
I mean like using the crane dual springs for the stock cam with 1.6 RR's
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Old 05-26-2004, 10:51 AM
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anyone?
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Old 05-26-2004, 11:17 AM
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I dont know/ever heard of any problems with too much spring. You will loose out on some power, as a stiffer spring is harder to compress, but how much is questionable.
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Old 05-26-2004, 11:41 AM
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ok, I was jsut worried that maybe it would break something or I dont even know.
I have chromemoly pushrods so they shouldnt bend or anything.


Hope I dont loose too much from it


and I hope its not too much of a pain in the *** to change the springs while the heads are on the car.
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Old 05-26-2004, 03:19 PM
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Power lost from strong valvesprings is "0". For every spring exerting pressure on the opening ramp, there is one exerting near equal pressure on a closing ramp. It is a regenerative system.

A hydraulic cam can take some high spring pressures. You have to watch oil viscosity and pressure though, cause these two can cause some pump-up problems. Generally, a strong spring only helps things but too much spring can also increase cam and lifter wear. "Too much" is a relative word though. How much open and closed pressure are you talking here?

-Mindgame
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Old 05-26-2004, 03:22 PM
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Originally posted by Mindgame
Power lost from strong valvesprings is "0". For every spring exerting pressure on the opening ramp, there is one exerting near equal pressure on a closing ramp. It is a regenerative system.

A hydraulic cam can take some high spring pressures. You have to watch oil viscosity and pressure though, cause these two can cause some pump-up problems. Generally, a strong spring only helps things but too much spring can also increase cam and lifter wear. "Too much" is a relative word though. How much open and closed pressure are you talking here?

-Mindgame

I dont know how much pressure, how can I find out?
they are the crane dual springs, pn 99893-16
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Old 05-26-2004, 04:12 PM
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Alrighty then, I can probably get you an answer with a little homework (not familiar with that spring) but have you thought about calling Crane and talking with them?

I'll get back with you....

-Mindgame
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Old 05-26-2004, 04:15 PM
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Originally posted by Mindgame
Alrighty then, I can probably get you an answer with a little homework (not familiar with that spring) but have you thought about calling Crane and talking with them?

I'll get back with you....

-Mindgame
no, but thats a good idea.

I'm going to call right now.

this is what I found on the site

http://www.cranecams.com/?show=brows...rtNumber=99893


Outer Diameter Outer 1.460
Outer Diameter Inner 1.075
Inner Diameter Inner .803
Damper NO
Seat Pressure @ Installed Height 120# @ 1.875
Open Pressure and Height 394# @ 1.175
Coil Bind 1.080
Average Spring Rate 391 #/IN
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Old 05-26-2004, 04:21 PM
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If your running alot of pressure your stock lifters could collapse, seems unlikely tho.
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