I have a dead valve spring

QWKSNKE · 05-24-2005, 10:09 AM

on one of the exhaust valves. Called AFR about it and they asked me questions on how many miles the heads on them (which was low) then they asked me about my cam (AFM B-31) as soon as I answered that the sales guy told me that I was going to need to replace all valve springs because the cam I am running is to aggressive for their 'stock' springs and their upgraded springs.

They guy said that he spoke from experience. If I understood him right, he said it wasn't the lift itself that was hard on their springs so much as it was the duration in conjunction with the lift on the AFM cams (218/228 @.050 duration and .544 lift)

So now, all of my damn springs on myheads have got to be replaced with some from comp cams

1Quik85GT · 05-24-2005, 11:23 AM

Lee

Are you running a dual spring with a dampner, whats your spring pressure. Usually the springs that come with the heads when you buy them will not take alot of cam. I would recommend a dual spring witha dampner and about 135lbs of pressure if you are running a Hyd. cam

Let me know

QWKSNKE · 05-24-2005, 12:06 PM

yeah it was a dual spring. I think seat pressure was around 125 or so as of right now

93Cobra#2771 · 05-24-2005, 01:49 PM

I'm betting the ramp rates are pretty steep on that cam. Fast ramp rates can give valvesprings fits at times.

You should look into the beehive springs since you gonna have to replace them anyway. You do know there is a way to replace valvesprings without removing the heads, right?

QWKSNKE · 05-24-2005, 03:46 PM

Quote:

Originally Posted by 93Cobra#2771

You should look into the beehive springs since you gonna have to replace them anyway. You do know there is a way to replace valvesprings without removing the heads, right?

yes I do but the heads have been off the car since last Thursday. Dropped them off last Friday to be inspected

coupe · 05-24-2005, 04:05 PM

Fast ramp rates with high RPM kill springs.

Here's a couple combos to try...

Camshaft: Crane PN# 449601 224/232 .542/.563
Springs: Crane PN# 99838

or a little less but niiice streetability:
Cam: Comp PN# 35-302-8 220/224 .512/.533
Springs: Comp PN# SK35-302-8 (I think)

Both nice blower cams I would use in a heartbeat. The comp will probably be smooth as glass, but the crane stuff will be cheaper.

natedawgg94 · 05-24-2005, 06:01 PM

Lee so your saying that if you keep your current setup your going to have to keep replacing spring every2,000 miles or so???

QWKSNKE · 05-24-2005, 07:00 PM

Quote:

Originally Posted by coupe

Fast ramp rates with high RPM kill springs.

Here's a couple combos to try...

Camshaft: Crane PN# 449601 224/232 .542/.563
Springs: Crane PN# 99838

or a little less but niiice streetability:
Cam: Comp PN# 35-302-8 220/224 .512/.533
Springs: Comp PN# SK35-302-8 (I think)

Both nice blower cams I would use in a heartbeat. The comp will probably be smooth as glass, but the crane stuff will be cheaper.

not changing cams just going to a better spring

slvrbullit · 05-24-2005, 07:38 PM

I sent my heads to the machine shop and my springs were dead as well, mine were edelbrock RPM heads and the springs that came on them. So now they have some nice comp springs that can handle a hydraulic roller or solid roller of .600+ lift

1Quik85GT · 05-25-2005, 01:24 AM

Something else has to be goin wrong there??? I have used the same springs for 4yrs, and havent had any problems and my motor stays at 7,000rpms and here lately I have turned it 7300..... You have to have a good spring that will maintain good pressure...I would go with comp cam springs, I haven never had any problems.

05-24-2005, 10:09 AM	#1
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	I have a dead valve spring on one of the exhaust valves. Called AFR about it and they asked me questions on how many miles the heads on them (which was low) then they asked me about my cam (AFM B-31) as soon as I answered that the sales guy told me that I was going to need to replace all valve springs because the cam I am running is to aggressive for their 'stock' springs and their upgraded springs. They guy said that he spoke from experience. If I understood him right, he said it wasn't the lift itself that was hard on their springs so much as it was the duration in conjunction with the lift on the AFM cams (218/228 @.050 duration and .544 lift) So now, all of my damn springs on myheads have got to be replaced with some from comp cams __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

05-24-2005, 12:06 PM	#3
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Re: I have a dead valve spring yeah it was a dual spring. I think seat pressure was around 125 or so as of right now __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

05-24-2005, 01:49 PM	#4
93Cobra#2771 The Kocky One Join Date: Dec 2004 Location: Yeah, but those cutters won't bust any walnuts.â„¢ Posts: 1,948	Re: I have a dead valve spring I'm betting the ramp rates are pretty steep on that cam. Fast ramp rates can give valvesprings fits at times. You should look into the beehive springs since you gonna have to replace them anyway. You do know there is a way to replace valvesprings without removing the heads, right? __________________ *For Sale: Reproduction Window Stickers, 87+ Mustangs, Cobras, Lightnings, and HD F150!* Richard White 93 Cobra Kocky will be back!

05-24-2005, 04:05 PM	#6
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Re: I have a dead valve spring Fast ramp rates with high RPM kill springs. Here's a couple combos to try... Camshaft: Crane PN# 449601 224/232 .542/.563 Springs: Crane PN# 99838 or a little less but niiice streetability: Cam: Comp PN# 35-302-8 220/224 .512/.533 Springs: Comp PN# SK35-302-8 (I think) Both nice blower cams I would use in a heartbeat. The comp will probably be smooth as glass, but the crane stuff will be cheaper. __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

05-24-2005, 06:01 PM	#7
natedawgg94 Senior Member Join Date: Apr 2005 Location: Ohatchee, AL Posts: 713	Re: I have a dead valve spring Lee so your saying that if you keep your current setup your going to have to keep replacing spring every2,000 miles or so??? __________________ 1994 Cobra Pace Car #365 of 1000 light mods 1994 mustang GT 3.55's, 331 stroker, 75mm tb, 75mm maf, mac h pipe SOLD (ole yella u will be missed ((>>. Rubbing Is Racing

05-24-2005, 11:23 AM	#2
1Quik85GT Senior Member Join Date: Apr 2005 Posts: 895	Re: I have a dead valve spring Lee Are you running a dual spring with a dampner, whats your spring pressure. Usually the springs that come with the heads when you buy them will not take alot of cam. I would recommend a dual spring witha dampner and about 135lbs of pressure if you are running a Hyd. cam Let me know

05-24-2005, 07:38 PM	#9
slvrbullit Super Moderator Join Date: Dec 2004 Location: on the water Posts: 1,280	Re: I have a dead valve spring I sent my heads to the machine shop and my springs were dead as well, mine were edelbrock RPM heads and the springs that came on them. So now they have some nice comp springs that can handle a hydraulic roller or solid roller of .600+ lift __________________ 2012 Jeep Wrangler Unlimited--- too many mods to list, about to be sitting on 1 ton axles. 2000 Ford F-350 Dually Lariat LE Crew Cab Short Box 7.3 auto 168,000 miles

05-25-2005, 01:24 AM	#10
1Quik85GT Senior Member Join Date: Apr 2005 Posts: 895	Re: I have a dead valve spring Something else has to be goin wrong there??? I have used the same springs for 4yrs, and havent had any problems and my motor stays at 7,000rpms and here lately I have turned it 7300..... You have to have a good spring that will maintain good pressure...I would go with comp cam springs, I haven never had any problems.