02-08-2006
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#1
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Banned
Join Date: Dec 2003
Location: Boulder, CO
Drives: Conquest
Posts: 5,049
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new valve springs - thinner than old
I just got my new "heavy duty" valve springs in the mail, opened the package and checked them out. They looked a little thin from what I remembered, so i compared them to the ones on the head in my garage and it do indeed look thinner than the stock ones.
Should this concern me? There was a label on the box that i'm sure the guy I bought them from scratched off, but it says pressure 100lbs. So, i believe they are the 100lb springs, and they fit in the retainers.
thanks.
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02-08-2006
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#2
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Join Date: Oct 2003
Location: Big Lake MN
Drives: 98 Eclipse GSX Auto
Posts: 1,516
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Re: new valve springs - thinner than old
I think my Crowers look a little thiner then the stock ones. what brand are they suposed to be.
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02-08-2006
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#3
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Re: new valve springs - thinner than old
Take them somewhere to check what pressure they are. Are the coil diameter smaller, like the thickness of the metal or is the overall size smaller?
__________________
Quote:
Originally Posted by shoutbox
cmspaz: Someone buys me a rubber fist, and I'll rock it on my hood.
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02-08-2006
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#4
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Banned
Join Date: Dec 2003
Location: Boulder, CO
Drives: Conquest
Posts: 5,049
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Re: new valve springs - thinner than old
I think they are schneider, that's the only brand i've heard of that makes replacment/upgrade springs specifically for the car. the diameter or the spring coil, not the overall diameter is what is thinner.
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02-08-2006
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#5
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back in the saddle again
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Re: new valve springs - thinner than old
Thinner spring diameter would mean a higher coil bind number.
If you are really worried have them tested at different seat heights.
__________________
My street car runs low 11's and my race car's personal best is a mid 11....
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02-08-2006
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#6
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Banned
Join Date: Dec 2003
Location: Boulder, CO
Drives: Conquest
Posts: 5,049
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Re: new valve springs - thinner than old
Yeah, i was talking to my cousin about that and he suggested taking it to a machine shop and having them tested, but if i post on SQC and see if anyone else has these and hasn't had any problems, might I be able to just toss them on? thing is, I'm not going with higher lift, it's stock valvetrain, so it should be like stock.
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02-08-2006
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#7
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back in the saddle again
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Re: new valve springs - thinner than old
If they are weaker a valve could hang up and kiss a piston.
Not a pretty match.
If they are too stiff you are wasting horsepower on drivetrain.
__________________
My street car runs low 11's and my race car's personal best is a mid 11....
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02-08-2006
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#8
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Banned
Join Date: Dec 2003
Location: Boulder, CO
Drives: Conquest
Posts: 5,049
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Re: new valve springs - thinner than old
that's why they are only 100 lb springs slightly stiffer than stock, it'll give me peace of mind at 6500 rpm.
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02-08-2006
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#9
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Asshat King
Join Date: Oct 2003
Location: Decorah / Ames, Iowa
Posts: 3,683
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Re: new valve springs - thinner than old
Quote:
Originally Posted by FattyBoomBatty
that's why they are only 100 lb springs
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Keep in mind that that force is going to increase as the spring is compressed: F=-kx where x is the distance and k is your spring constant.
__________________
DSMSTYLE MAFIA - Holdin' Down the Cornfields of IA
'92 Laser RS AWD & '01 Grand Prix GTP
Proud to be a Cyclone
Check it out: Racers Against Street Racing
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02-09-2006
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#10
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Sten Sniper
Join Date: Oct 2003
Location: New Hope
Drives: Evo VIII RS
Posts: 1,385
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Re: new valve springs - thinner than old
Yeah....but conquests cant eat valves can they? Why dont you toss em in and see where valve float is.
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02-09-2006
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#11
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Totenritt
Join Date: Nov 2004
Location: Gardner, KS
Drives: Cranberry Plastic, Shiny red Bayliner with a V10
Posts: 1,670
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Re: new valve springs - thinner than old
LMAO! Nice kill, CVD! JAKEY GOT PWONDEDOBNDDVNVONED!!!!11!!!1!1!one!
__________________
When you can leave two black strips from the apex to the braking zone, you have enough power~Donohue
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02-09-2006
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#12
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15min late to the world
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Re: new valve springs - thinner than old
We have a valve spring lb gauge. We could test your springs, give you how many lbs of pressure at this spring height.
~John
__________________
Moon taxi: 9.45@156.9 mph 41psi 2011... Letting people down sense 2012.
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02-09-2006
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#13
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Is funding Exxon.
Join Date: Oct 2003
Location: Ham Lake
Drives: like a bat outta hell!
Posts: 7,983
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Re: new valve springs - thinner than old
A thinner spring doesn't necessarily mean a lower pressure. They are likely using a better material than the truck engine originally had I agree, put them in and let er rip.
__________________
Is burning corn and stayin' warm!
My motorcycle is stock and reliable, my Talon is neither!
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02-09-2006
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#14
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back in the saddle again
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Re: new valve springs - thinner than old
I personally would test them before install, doing shit twice is a waste of time. Odds are that they are a better material, but the odds are also in the favor of someone being struck by lightening before winning a lottery .
__________________
My street car runs low 11's and my race car's personal best is a mid 11....
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02-09-2006
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#15
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Banned
Join Date: Dec 2003
Location: Boulder, CO
Drives: Conquest
Posts: 5,049
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Re: new valve springs - thinner than old
Quote:
Originally Posted by JET
A thinner spring doesn't necessarily mean a lower pressure. They are likely using a better material than the truck engine originally had I agree, put them in and let er rip.
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that's what's been going around in circles in my head. thanks for the good advice! i knew i shouldn't have listened to those anoka boys up at LSD!
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02-09-2006
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#16
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back in the saddle again
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Re: new valve springs - thinner than old
Maple Grove.
__________________
My street car runs low 11's and my race car's personal best is a mid 11....
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02-10-2006
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#17
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Banned
Join Date: Dec 2003
Location: Boulder, CO
Drives: Conquest
Posts: 5,049
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Re: new valve springs - thinner than old
Same difference.
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02-11-2006
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#18
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Banned
Join Date: Dec 2003
Location: Boulder, CO
Drives: Conquest
Posts: 5,049
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Re: new valve springs - thinner than old
OMG, guess i should have checked the innernet before putting it back together. I got the valves installed, it wasn't too bad, i made my own spring compressor out of a couple peices of wood, then leaned on 'em. good thing I'm not a twig, but too bad I didn't have swanny over
anyway, the stock hydraulic lifters were made for late model valves (i got '83 style - longer) so the valves don't close all the way. luckily, someone is always selling a set of mechanical rockers. so i'll have it all ready to go by the time i get the required gaskets.
PEACE!
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