Slant *       6       Forum
Home Home Home
The Place to Go for Slant Six Info!
Click here to help support the Slant Six Forum!
It is currently Mon Dec 02, 2024 3:37 am

Unanswered topics | Active topics


» » Tech Q & A » Engine

All times are UTC-08:00



Post new topic  Reply to topic  Page 1 of 1
  [ 11 posts ] 
  Print view Previous topic | Next topic 
Author Message
805moparkid
 Post subject: Valve Spring Help
PostPosted: Sat Feb 11, 2012 7:39 pm 
Offline
EFI Slant 6
User avatar

Joined: Wed Nov 19, 2008 12:05 pm
Posts: 424
Location: Phoenix AZ
Car Model:
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

_________________
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
Top
   
Reply with quote  
Joshie225
 Post subject:
PostPosted: Sat Feb 11, 2012 8:28 pm 
Offline
Supercharged
User avatar

Joined: Thu Jan 27, 2005 8:32 pm
Posts: 7834
Location: Portland-ish
Car Model: Fiat 500e
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

_________________
Joshua
Top
   
Reply with quote  
805moparkid
 Post subject:
PostPosted: Sat Feb 11, 2012 8:30 pm 
Offline
EFI Slant 6
User avatar

Joined: Wed Nov 19, 2008 12:05 pm
Posts: 424
Location: Phoenix AZ
Car Model:
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)

_________________
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
Top
   
Reply with quote  
raPoM
 Post subject:
PostPosted: Sat Feb 11, 2012 8:33 pm 
Offline
Turbo Slant 6
User avatar

Joined: Fri May 08, 2009 5:44 pm
Posts: 721
Location: Reno NV
Car Model:
Ed-

Any luck fixing the "cut out" problem you were having? Is this related to that?
Top
   
Reply with quote  
805moparkid
 Post subject:
PostPosted: Sat Feb 11, 2012 8:39 pm 
Offline
EFI Slant 6
User avatar

Joined: Wed Nov 19, 2008 12:05 pm
Posts: 424
Location: Phoenix AZ
Car Model:
Quote:
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

_________________
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
Top
   
Reply with quote  
Dart270
 Post subject:
PostPosted: Sun Feb 12, 2012 1:40 am 
Offline
Board Sponsor & Moderator
User avatar

Joined: Mon Oct 21, 2002 11:08 am
Posts: 16793
Location: Blacksburg, VA
Car Model:
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

_________________
Home of Slant6-powered fun machines since 1988
Top
   
Reply with quote  
terrylittlejohn
 Post subject:
PostPosted: Sun Feb 12, 2012 5:58 am 
Offline
Turbo EFI

Joined: Tue May 17, 2005 4:26 pm
Posts: 1237
Location: CBS Newfoundland Canada
Car Model:
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
Top
   
Reply with quote  
805moparkid
 Post subject:
PostPosted: Sun Feb 12, 2012 7:01 am 
Offline
EFI Slant 6
User avatar

Joined: Wed Nov 19, 2008 12:05 pm
Posts: 424
Location: Phoenix AZ
Car Model:
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

_________________
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
Top
   
Reply with quote  
Dart270
 Post subject:
PostPosted: Sun Feb 12, 2012 8:51 am 
Offline
Board Sponsor & Moderator
User avatar

Joined: Mon Oct 21, 2002 11:08 am
Posts: 16793
Location: Blacksburg, VA
Car Model:
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

_________________
Home of Slant6-powered fun machines since 1988
Top
   
Reply with quote  
805moparkid
 Post subject:
PostPosted: Sun Feb 12, 2012 11:01 am 
Offline
EFI Slant 6
User avatar

Joined: Wed Nov 19, 2008 12:05 pm
Posts: 424
Location: Phoenix AZ
Car Model:
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.

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!

_________________
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
Top
   
Reply with quote  
805moparkid
 Post subject:
PostPosted: Sun Feb 12, 2012 12:45 pm 
Offline
EFI Slant 6
User avatar

Joined: Wed Nov 19, 2008 12:05 pm
Posts: 424
Location: Phoenix AZ
Car Model:
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...

_________________
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
Top
   
Reply with quote  
Display posts from previous:  Sort by  
Post new topic  Reply to topic  Page 1 of 1
  [ 11 posts ] 

» » Tech Q & A » Engine

All times are UTC-08:00

Who is online

Users browsing this forum: Bing [Bot] and 22 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited