| Slant Six Forum https://slantsix.org/forum/ |
|
| Valve Spring Help https://slantsix.org/forum/viewtopic.php?t=47882 |
Page 1 of 1 |
| Author: | 805moparkid [ Sat Feb 11, 2012 7:39 pm ] |
| Post subject: | Valve Spring Help |
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 |
|
| Author: | Joshie225 [ Sat Feb 11, 2012 8:28 pm ] |
| Post subject: | |
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 |
|
| Author: | 805moparkid [ Sat Feb 11, 2012 8:30 pm ] |
| Post subject: | |
Quote: 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) |
|
| Author: | raPoM [ Sat Feb 11, 2012 8:33 pm ] |
| Post subject: | |
Ed- Any luck fixing the "cut out" problem you were having? Is this related to that? |
|
| Author: | 805moparkid [ Sat Feb 11, 2012 8:39 pm ] |
| Post subject: | |
Quote: Ed-
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...Any luck fixing the "cut out" problem you were having? Is this related to that? i know the pump was on marks 11 second almost 100hp more drag car so the pump is fine... not much left lol |
|
| Author: | Dart270 [ Sun Feb 12, 2012 1:40 am ] |
| Post subject: | |
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 |
|
| Author: | terrylittlejohn [ Sun Feb 12, 2012 5:58 am ] |
| Post subject: | |
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 |
|
| Author: | 805moparkid [ Sun Feb 12, 2012 7:01 am ] |
| Post subject: | |
Quote: 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 |
|
| Author: | Dart270 [ Sun Feb 12, 2012 8:51 am ] |
| Post subject: | |
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 |
|
| Author: | 805moparkid [ Sun Feb 12, 2012 11:01 am ] |
| Post subject: | |
Quote: 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.
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!
Lou |
|
| Author: | 805moparkid [ Sun Feb 12, 2012 12:45 pm ] |
| Post subject: | |
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... |
|
| Page 1 of 1 | All times are UTC-08:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|