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805moparkid
 Post subject: Valve Spring Help
PostPosted: Sat Feb 11, 2012 7:39 pm 
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ok so im gonna comfirm tomorrow but i think my Erson valve springs are takin a dump...

here are the part number for them... i cant seem to find any specs on them though...

what are you guys running a 6K revin solid cammed motor?

looking for around 120 seat/380 open

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Joshie225
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PostPosted: Sat Feb 11, 2012 8:28 pm 
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380 open seem like a lot. Did you test the valve springs when they were new by any chance? Have you pulled a couple to test them

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805moparkid
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PostPosted: Sat Feb 11, 2012 8:30 pm 
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380 open seem like a lot. Did you test the valve springs when they were new by any chance? Have you pulled a couple to test them
well new springs lose 15-20% within the first heat cycle so about 300 would be perfect...

but no when i installed the springs that was above my knowlodge of things to check lol...

gonna pull them tomorrow and check them... if they are bad i might just pull the head and mill some more for a better static... still trying to figure out to use seat to seat (7.45) or @.050 (8.37)

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raPoM
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PostPosted: Sat Feb 11, 2012 8:33 pm 
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Ed-

Any luck fixing the "cut out" problem you were having? Is this related to that?
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805moparkid
 Post subject:
PostPosted: Sat Feb 11, 2012 8:39 pm 
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Ed-

Any luck fixing the "cut out" problem you were having? Is this related to that?
yea the MSD box went in today, along with the rebuilt/recurved dizzy with blue streak cap (game up on rotor)... runs better but didn't help the miss...

i know the pump was on marks 11 second almost 100hp more drag car so the pump is fine...

not much left lol

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Dart270
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PostPosted: Sun Feb 12, 2012 1:40 am 
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How many years/miles on these springs? What are cam specs again? In my experience, it takes a long time for valve springs to fatigue. What are the symptoms?

I have had it happen to me once with a cheap set of 1.26" diam single 350 chev springs after about 50k miles on a MP 276 deg, 0.490" cam. Another time, I had about 40-50k on my 250 @ 0.050, 0.510" cam and the shop said the springs were weak but it would still rev well to 6000.

Hmmm,

Lou

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terrylittlejohn
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PostPosted: Sun Feb 12, 2012 5:58 am 
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i have a dual sb dodge rated at 139lbs at 1.70" , 390lbs at .500 lift, there rated for .610" lift. i have them installed at 1.68" and running 556" lift. i have been racing them for 12yrs now no problems
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805moparkid
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PostPosted: Sun Feb 12, 2012 7:01 am 
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How many years/miles on these springs? What are cam specs again? In my experience, it takes a long time for valve springs to fatigue. What are the symptoms?

built the motor in the end of 09, has about 12K or so on the motor... can is 246 @ .050 .340 lobe

I have had it happen to me once with a cheap set of 1.26" diam single 350 chev springs after about 50k miles on a MP 276 deg, 0.490" cam. Another time, I had about 40-50k on my 250 @ 0.050, 0.510" cam and the shop said the springs were weak but it would still rev well to 6000.

Hmmm,

Lou

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Dart270
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PostPosted: Sun Feb 12, 2012 8:51 am 
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300 lbs open should be plenty, I would think, for that cam. Only way to know is to test them, I guess. 12k miles should not be too much. I'll be interested to see what you find.

Lou

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805moparkid
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PostPosted: Sun Feb 12, 2012 11:01 am 
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300 lbs open should be plenty, I would think, for that cam. Only way to know is to test them, I guess. 12k miles should not be too much. I'll be interested to see what you find.

Lou
2x... just finished my home made on the car valve spring remover which i can start making for people if need be... let you know how it works!

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1965 Plymouth A/FX 512ci (under construction)
1968 Dodge Dart SL6 14.25 @ 91.5 1.91 60'
1973 Dodge Dart SL6 Stock
Killer Bee's Member Since 09'
http://www.forabodiesonly.com/mopar/sho ... p?t=128702
http://www.youtube.com/user/805moparkid
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805moparkid
 Post subject:
PostPosted: Sun Feb 12, 2012 12:45 pm 
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ok so checked a cylinder...

they were...

75lbs @ installed height of 1.72

250lbs @ compressed height of 1.26...

way off...

so im now in the market for springs...

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1965 Plymouth A/FX 512ci (under construction)
1968 Dodge Dart SL6 14.25 @ 91.5 1.91 60'
1973 Dodge Dart SL6 Stock
Killer Bee's Member Since 09'
http://www.forabodiesonly.com/mopar/sho ... p?t=128702
http://www.youtube.com/user/805moparkid
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