Re: Cam Break-in How much Lighter on the Springs??
[Re: 1_WILD_RT]
#297967
04/24/09 12:02 AM
04/24/09 12:02 AM
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Joined: Nov 2007
Posts: 51
San Angelo Tx
Alan Warman
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member
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Posts: 51
San Angelo Tx
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On are stocker the break in springs are 100lbs on the seat.After it is broke in and we change the springs.The seat pressure is 170 to 180 and over the nose is about360.This is with a stock lift Hyd cam.
Alan Warman
STK 4107
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Re: Cam Break-in How much Lighter on the Springs??
[Re: Quicksilver440]
#297968
04/24/09 12:09 AM
04/24/09 12:09 AM
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Joined: Jan 2004
Posts: 27,347
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1_WILD_RT
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Quote:
120ish/330ish single springs....is what I used.
Sounds like the stock Edelbrock springs which is the lighter set that I have & I'm considering using but kinda worried about..My other springs are Beehives so no double to remove the inner from... I'd considered stock type springs but concerned about coil bind...
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Re: Cam Break-in How much Lighter on the Springs??
[Re: 1_WILD_RT]
#297969
04/24/09 01:21 AM
04/24/09 01:21 AM
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Joined: Jan 2003
Posts: 10,766
Central Valley, CA.
Quicksilver440
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Quote:
Quote:
120ish/330ish single springs....is what I used.
Sounds like the stock Edelbrock springs which is the lighter set that I have & I'm considering using but kinda worried about..My other springs are Beehives so no double to remove the inner from... I'd considered stock type springs but concerned about coil bind...
Yep...stock eddy springs are what I used. Fast68plymouth told me it would be fine...and it was.
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Re: Cam Break-in How much Lighter on the Springs??
[Re: Cab_Burge]
#297971
04/24/09 01:35 AM
04/24/09 01:35 AM
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1_WILD_RT
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Quote:
remember to make sure the motor starts instantly and gets rev to 1500 RPM plus to 2500 RPM for at leats 20 minutes 
Always!! I've built plenty of stock stuff & tuned lots of hotrods, in the past I would have fired it with the Edelbrock springs without a second thought...Just want to take every precaution knowing how many are lossing cams.. I've never lost one & don't care to start on this motor... I'm thinking I might fire it on the dyno so I can load the rings some while the cam is breaking in...
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Re: Cam Break-in How much Lighter on the Springs??
[Re: 1_WILD_RT]
#297973
04/24/09 06:12 PM
04/24/09 06:12 PM
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Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
64Post
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Posts: 8,716
Baltimore/Denver
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Quote:
As the title states, what kind of pressure do you use for breaking in a new cam? I'll be running a Conventional Flat Tappet with EDM'ed Solid Lifters... Thanks
I wouldn't sweat it too much. You're ahead of the game with the EDM lifters; smart move. 
No problems so far with mine and I'm running about 340# open. I'm running dual springs and I did remove the inner for break in. Also used Brad Penn oil, and GM EOS just to be safe.
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Re: Cam Break-in How much Lighter on the Springs??
[Re: Cab_Burge]
#297974
04/24/09 10:57 PM
04/24/09 10:57 PM
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Joined: Jan 2003
Posts: 16,928
NC
440Jim
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Quote:
If you can get 100 lbs on the seat and 250 to 275 open that should work well,
The whole idea is to reduce the risk of wiping a lobe, so just enough to run 3000 rpm is all you need. I like the above numbers. You can try more, but the more the more risk. Sometimes you get lucky with full pressure, but do you feel lucky, punk? (Clint Eastwood)
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Re: Cam Break-in How much Lighter on the Springs??
[Re: 440Jim]
#297975
04/25/09 10:10 AM
04/25/09 10:10 AM
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Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines
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Syracuse,NY
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I also like 100# to break in solids. You arent worried about anything with breaking in the cam as far as lift, bind etc...you simpy wont be turning it that high like Jim says. The other thing to do, is mark the tops of the lifters, turn engine over by hand first, make sure they are rotating before you do anything else. If so, your 95% there anyhow, go with a 100ish # spring,all will be fine.
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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