Re: Single vs Dual Valve Spring Question
[Re: A4SixtyNineRR]
#649093
03/23/10 05:23 PM
03/23/10 05:23 PM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
I was thinking the same thing too. These cars were built with single springs and people ran the hell out of them. Its possible that the heads wouldn't need additional machining, but he wasn't sure until he got into it. If that were the case, the dual springs are only about $70 more... but that is still money that could be spent elsewhere on the car if dual springs won't gain me anything.
and that isn't counting the machine work that will have to be done to the heads to make a dual spring work. If you don't need them don't use them. Use a single spring rated for the cam if possible.
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Re: Single vs Dual Valve Spring Question
[Re: MoparforLife]
#649094
03/23/10 05:27 PM
03/23/10 05:27 PM
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Joined: Sep 2007
Posts: 90
Columbus, Ohio
A4SixtyNineRR
OP
member
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OP
member
Joined: Sep 2007
Posts: 90
Columbus, Ohio
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Quote:
Quote:
I was thinking the same thing too. These cars were built with single springs and people ran the hell out of them. Its possible that the heads wouldn't need additional machining, but he wasn't sure until he got into it. If that were the case, the dual springs are only about $70 more... but that is still money that could be spent elsewhere on the car if dual springs won't gain me anything.
and that isn't counting the machine work that will have to be done to the heads to make a dual spring work. If you don't need them don't use them. Use a single spring rated for the cam if possible.
Ok, good to hear I was thinking the right thing. Comp Cams recommends both options with similar spring rates so I wasn't sure if there was a big advantage to using dual on a street motor. Thanks for the opinions so far.
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Re: Single vs Dual Valve Spring Question
[Re: A4SixtyNineRR]
#649096
03/23/10 07:00 PM
03/23/10 07:00 PM
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Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines
master
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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You need nothing more than a single spring for what you are doing.Probably a Comp 911.
RIP Monte Smith
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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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Re: Single vs Dual Valve Spring Question
[Re: CompWedgeEngines]
#649097
03/23/10 09:18 PM
03/23/10 09:18 PM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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Many modern cams need dual springs even with lower lofts because of the fast rate of lift. If you are having the ehads doen anyway, I'd have the spring seats and guides trimmed for the positive seals now. Even if you dont need them right now, you may, and it's cheap to do now and you'll have better valve seals regardless of the spring. You can run single springs with std guides and std seats, but you can never run dual springs with factory seals or spring seats.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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use a drop on single spring and save the $ for something else..
