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Valve Spring Comparison #1


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Galant VR-4 org Post #: 1139926 posted 09/11/13 10:10 AM     Remind Me!  Send Private Message   Edit Post      
Valve spring comparison
BC1100 HKS Stock


The line up is (L to R)
BC1100 (NIB)
HKS Single appox 10k miles used
Stock 2G appox 140k miles Used
Kia Looked like a 4G mutant Head, ? miles Used



Used Stock 2g spring


55lbs @ 1.530

Kia used spring


58lbs @ 1.530

HKS

60LBS @ 1.530


BC1100 New

74 lbs @ 1.530



I know it is a bit unfair to check a new spring against 3 used springs.
But this is what I had on hand at the time.

Posts: 232 | From: Pensacola, Florida | Member Since: 08/29/13 | IP: (173.245.50.184) | Report this post to a Moderator

mitsuturbo
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Galant VR-4 org Post #: 1140221 posted 09/13/13 11:40 AM     Remind Me!  Send Private Message   Edit Post      
I have supertech high tension duals, and I've been concerned that maybe they're TOO stiff. IIRC the shop tested them and told me they're at about 110# at installed height. This is in line with the spec supertech has posted on their site for their stiffest spring. At least i won't have to worry about valve float, but i do have concerns about the longevity of my rockers and Kelford cams with these installed.



92 GVR4 555/1000 11.41 @ 128.26mph
97 CBR900RR
2012 Hyundai Veloster

Posts: 3537 | From: Near Seattle, Washington | Member Since: 06/02/08 | IP: (199.27.128.210) | Report this post to a Moderator

Happy Birthday BogusSVO
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Galant VR-4 org Post #: 1140224 posted 09/13/13 11:49 AM     Remind Me!  Send Private Message   Edit Post      
Well you are good for upper 9K RPM shifts set up for that.

The stock DSM rockers are fairly tuff , and the cams will not have issue.

My concern would be the valves, More so if you do take it to the upper rpm band a fair bit.

You running stock valves? or a decent after market stainless?

Posts: 232 | From: Pensacola, Florida | Member Since: 08/29/13 | IP: (173.245.50.184) | Report this post to a Moderator

mitsuturbo
Banthony
555/1000


Galant VR-4 org Post #: 1140253 posted 09/13/13 01:24 PM     Remind Me!  Send Private Message   Edit Post      
I don't remember if I'm running SI or EPN 1pc stainless valves with the kelford 272's, but i know they're a far better valve than stockers. I've had no issue revving to 8.5k, but i dont have a lot of miles on the new setup yet. Time will tell.

Edit: Also, i think it is worth noting that one of the primary reasons i NEVER run "stock" valves, is that they're a 2 piece design. Losing a timing belt is never a good thing, but better valves are a bit safer, IMO. I've yet to see a 1pc stainless valve break off and run amok like shown in your previous post about head repair. I've seen plenty of stockers break off and cause a lot more damage than what you illustrated. At least if they don't snap off, the most you're usually faced with is cracked guides along with the bent valves.



92 GVR4 555/1000 11.41 @ 128.26mph
97 CBR900RR
2012 Hyundai Veloster


Edited by mitsuturbo (09/13/13 01:34 PM)

Posts: 3537 | From: Near Seattle, Washington | Member Since: 06/02/08 | IP: (199.27.128.210) | Report this post to a Moderator

prove_it
my racist jokes aren't actually funny
715/1000
1284/2000


Galant VR-4 org Post #: 1140271 posted 09/13/13 02:43 PM     Remind Me!  Send Private Message   Edit Post      
Been there done that with some old stem cut valves I got from turbotrix back in the day. Bent 12/16 and cracked 8 guides. Didn't do squat to the pistons though, yay! Stock valves would have left some carnage.



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Posts: 4201 | From: Sioux Falls, SD | Member Since: 07/04/08 | IP: (108.162.221.149) | Report this post to a Moderator

Egalloway
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737/2000


Galant VR-4 org Post #: 1140292 posted 09/13/13 05:19 PM     Remind Me!  Send Private Message   Edit Post   
Nice info.
Lets see some pics of those springs your using on my head when it makes it to you early next week Dale. Head is leaving out Monday sorry for the delay getting it down to you.



737/2000 for sale in classifieds

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