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1.550 valv e springs, 250+seat and 700+ open?Update #661256
04/05/10 12:07 AM
04/05/10 12:07 AM
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Bend,OR USA
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Cab_Burge Offline OP
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I'm looking for a new set of valve springs that need to be 1.50 to 1.56 O.D. installed at around 1.950 installed hieght that I can get 680 + lbs open pressure with .730 net lift
I'm using a set of T&D rockers and can not use the 1.625 O.D. springs on that set I called and ordered a set of the PAC 1225 dual valve springs for my motor direct from PAC Very easy to deal with THANKS TO ALL OF YOU FOR THE HELP. The 527 will run again and hopefully make power at a higher RPM These springs call for a installed hieght of 2.00 with 250 lbs seat pressure they show 765 lbs open pressure at 1.200 or .800 lift. I will play around with the install hieght and the coil bind distance to get the most pressures I can. I'm shooting for .060 to .080 from coil bind on the open hieghts. My current installed hieght is 1.960 to 1.980 with the Comp Tititanium 10 degree retainers, I'm hoping they will work if not I guess it is time to buy the correct ones I'm also planning on replacing the 3/8x.120 wall pushrods with some thicker, stiffer ones

Last edited by Cab_Burge; 04/06/10 02:55 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Cab_Burge] #661257
04/05/10 12:27 AM
04/05/10 12:27 AM
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aotearoa
rebel Offline
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aotearoa
tough call Cab, couldn't find anything on comp cams site, why can't you remachine for 1.62 dia?

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Cab_Burge] #661258
04/05/10 12:31 AM
04/05/10 12:31 AM
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Alberta Canada
StrokerAspen Offline
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I am in the same boat.

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Cab_Burge] #661259
04/05/10 12:59 AM
04/05/10 12:59 AM
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Hinterland SE Qld Aust
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SG duster Offline
mopar
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Hinterland SE Qld Aust
have a look at crane's 96886-16 they are a bit heavyer over the nose but there might be somthing in the area your looking for, my machine shop told me to use isky tool room springs with my roller

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Cab_Burge] #661260
04/05/10 01:22 AM
04/05/10 01:22 AM
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Aurora, Colorado
451Mopar Offline
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I am using the PAC-1225 springs.

http://www.pacracing.com/1200_Series-Dual_Springs.html

OD = 1.550", 250# at 2.00", 765# at 1.20" rated for 0.800" lift.

I don't have the part number handy, but I used Crower +0.100" height Ti retainers to get 1.950" install height. I think the closed pressure at 1.950" is around 270-275. Originally I had also used +0.050" locks to get 2.00" install height, but my T&D rockers would not clear the retainer. It would probbably work if I was using lash caps, but then I would have to get shorter pushrods.

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: 451Mopar] #661261
04/05/10 05:31 AM
04/05/10 05:31 AM
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moparniac Offline
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I never understood why people say T&D's are better than harlands........


Mopar Performance
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: moparniac] #661262
04/05/10 07:27 AM
04/05/10 07:27 AM
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Arizona
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Chris'sBarracuda Offline
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Well silly, it's because they are..

Not opinion, just a fact..

BTW. I use 1.625 Erson/Nextek on my T&D set up.. no issues..
Just get the right retainer.

This is a B1 with over .830 lift. 285# seat & 810# open.. 2.050 installed ht.

#1224 or #1324 pac would be the best choice at that size, but the pac #1225 1.550 is a really good spring also.



Chris..

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Chris'sBarracuda] #661263
04/05/10 09:15 AM
04/05/10 09:15 AM
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Ontario, Canada
Dodgem Offline
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A friend of mine just got a set of Isky's expensive but with close to those specs 9968-RAD
250 @ 1.950 and 670 @ 1200 could bind 1100.

http://www.iskycams.com/springbook.pdf

If you phone Isky ask for Ron the other guy bassicaly wants to hang up right away!!!

Last edited by Dodgem; 04/05/10 09:16 AM.
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Cab_Burge] #661264
04/05/10 10:35 AM
04/05/10 10:35 AM
Joined: Feb 2004
Posts: 1,093
Long Beach, CA
Mike Swann Offline
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Mike Swann  Offline
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Long Beach, CA
Cab,

Take a look at Comp 999. I have have had really good luck with these and have an orphaned set, cheap. Managet to get to 8K with SS valves and a tame ramp.

Mike


8.30's @3400 lbs
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Chris'sBarracuda] #661265
04/05/10 11:59 AM
04/05/10 11:59 AM
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U.S.
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moparniac Offline
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Quote:

Well silly, it's because they are..

Not opinion, just a fact..



Chris..




does anyone have any facts on this or us it like saying one oil is better than the other from engine failure.


Mopar Performance
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Mike Swann] #661266
04/05/10 12:01 PM
04/05/10 12:01 PM
Joined: May 2005
Posts: 1,944
Apollo, PA.
B1MAXX Offline
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comp 944's @ 1.89

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: 451Mopar] #661267
04/05/10 01:30 PM
04/05/10 01:30 PM
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Bend,OR USA
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Cab_Burge Offline OP
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Quote:

I am using the PAC-1225 springs.

http://www.pacracing.com/1200_Series-Dual_Springs.html

OD = 1.550", 250# at 2.00", 765# at 1.20" rated for 0.800" lift.

I don't have the part number handy, but I used Crower +0.100" height Ti retainers to get 1.950" install height. I think the closed pressure at 1.950" is around 270-275. Originally I had also used +0.050" locks to get 2.00" install height, but my T&D rockers would not clear the retainer. It would probbably work if I was using lash caps, but then I would have to get shorter pushrods.


That looks like the answer I have a set of Comp Cams on there now, they set up at 275 on the seat and 670 to 680 over the nose new. This is on my 527 motor that I have been dyno testing carbs and intakes on. I lost two pistons in it due to detonation and I'm putting it back together now, the springs lost around 25 lbs on the seat and over the nose. The motor made peak HP around 6500 RPM and I'm wanting to push that higher so the quest for a better valve spring. Last question, I hope, who has the best deal on those valve springs? Thanks to all of you, together we can help each other


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Cab_Burge] #661268
04/05/10 02:07 PM
04/05/10 02:07 PM
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Missouri
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galen Offline
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Missouri
Cab I just got rid of a set of K-motion K950s . 1.550 diam. 2" installed height. 245 lbs. seat. 690lbs. at 1.3. At 1.250 I was well over 700 lbs on my tester at .730. Coil bind 1.150. They are a H11 tool steel spring. I ran a set of plus .050 locks put me at 2".

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Cab_Burge] #661269
04/05/10 03:12 PM
04/05/10 03:12 PM
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Trumbull,CT.
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jim sciortino Offline
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Quote:

Quote:

I am using the PAC-1225 springs.

http://www.pacracing.com/1200_Series-Dual_Springs.html

OD = 1.550", 250# at 2.00", 765# at 1.20" rated for 0.800" lift.

I don't have the part number handy, but I used Crower +0.100" height Ti retainers to get 1.950" install height. I think the closed pressure at 1.950" is around 270-275. Originally I had also used +0.050" locks to get 2.00" install height, but my T&D rockers would not clear the retainer. It would probbably work if I was using lash caps, but then I would have to get shorter pushrods.


That looks like the answer I have a set of Comp Cams on there now, they set up at 275 on the seat and 670 to 680 over the nose new. This is on my 527 motor that I have been dyno testing carbs and intakes on. I lost two pistons in it due to detonation and I'm putting it back together now, the springs lost around 25 lbs on the seat and over the nose. The motor made peak HP around 6500 RPM and I'm wanting to push that higher so the quest for a better valve spring. Last question, I hope, who has the best deal on those valve springs? Thanks to all of you, together we can help each other


PAC springs ARE the answer.

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: jim sciortino] #661270
04/05/10 03:25 PM
04/05/10 03:25 PM
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ms
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Just bought a set for my w2 heads. Made by comp cams they were less than 200.00 from Barker automotive. You have to buy them on ebay and they will ship from comp.

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: 451Mopar] #661271
04/05/10 03:35 PM
04/05/10 03:35 PM
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New York
polyspheric Offline
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It would probbably work if I was using lash caps, but then I would have to get shorter pushrods

Thus, introducing 2 errors.
If the geo is already correct (but clearance is not) lash caps require stand shims and longer pushrods.


Boffin Emeritus
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: moparniac] #661272
04/05/10 05:35 PM
04/05/10 05:35 PM
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Arizona
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Quote:

Quote:

Well silly, it's because they are..

Not opinion, just a fact..



Chris..




does anyone have any facts on this or us it like saying one oil is better than the other from engine failure.





Just look at the valvetrain on Pro Stock and Comp cars.

I'll bet you see Jesel or T&D.

And I'll also bet you wont find any Harland Sharps on those engines.. That to me, would be fact..



Chris..

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Chris'sBarracuda] #661273
04/05/10 05:39 PM
04/05/10 05:39 PM
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Michigan
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Hemiroid Offline
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Quote:

Quote:

Quote:

Well silly, it's because they are..

Not opinion, just a fact..



Chris..




does anyone have any facts on this or us it like saying one oil is better than the other from engine failure.





Just look at the valvetrain on Pro Stock and Comp cars.

I'll bet you see Jesel or T&D.

And I'll also bet you wont find any Harland Sharps on those engines.. That to me, would be fact..



Chris..




You may see Wilfords stuff and Jesel, but I don't think T&Ds stuff is in PS. That being said, T&D is a great rocker and is on a lot of very fast cars.

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Hemiroid] #661274
04/06/10 03:06 PM
04/06/10 03:06 PM
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Bend,OR USA
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Cab_Burge Offline OP
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I bought a set of the PAC springs, see the first post for the details. Thanks to all for the help


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Cab_Burge] #661275
04/06/10 03:18 PM
04/06/10 03:18 PM
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poplar bluff mo.
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toplescuda Offline
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has anyone heard of pbm??im not 100% sure...i had new springs put on the hemi and this was the box he sent my old springs/retainers/locks back in the springs are 1.550 o.d. dual springs part # was 3840 210#@1.90 660#1.200 700 max lift 1.100 coil bind the car is solid roller with right at 600 lift is these springs worth a crap? what kind of rpm would this combo be good for (426 hemi alum rods)
sory for the hi-jack


1970 barracuda convert. 1 of 59
1970 pro street A.A.R. clone (panther pink)
1971 charger
2015 hellcat challenger. Redline red
2014 quad cab 4x4 ram 8 speed hemi
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Cab_Burge] #661276
04/06/10 04:40 PM
04/06/10 04:40 PM
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Left Coast
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BobR Offline
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Quote:

I bought a set of the PAC springs, see the first post for the details. Thanks to all for the help




You may know, Cab, that PAC is all Jason uses on our motors and we buzz them pretty high.

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: BobR] #661277
04/06/10 05:45 PM
04/06/10 05:45 PM
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Bend,OR USA
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Cab_Burge Offline OP
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Quote:

Quote:

I bought a set of the PAC springs, see the first post for the details. Thanks to all for the help




You may know, Cab, that PAC is all Jason uses on our motors and we buzz them pretty high.


I did not know that, the last time I talked to him(a long time ago,4 or 5 yrs) about valve springs he was using Manley, Nextext and some Crowers, I think. Thanks for the heads up BTW, how you guys do in Bakerfields, Doug won't answer his shop phone when I call I figured he lost or screwed up and is ashame to talk to me


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Cab_Burge] #661278
04/06/10 05:59 PM
04/06/10 05:59 PM
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Arizona
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Chris'sBarracuda Offline
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Interesting post here.. I'm sold on PAC..


Yeahdoug wrote:

Lem Evans wrote:221424-16 Manley Nextex . Erson spring looks to be the same unit....blue stripe deal .



Some fatigue test data I did comparing the 221424 polished and non polished to our PAC-1224/1324 (our copy of that spring with our own flavor of processing).


These are the cycle counts for the first failures of each part. All springs were tested to the same 1.300" stroke (overstressed to induce failures).

Manley 221424 STD: 4,995 cycles.
Manley 221424P Electro-polished: 22,277 cycles.

PAC-1324: 866,530 cycles.
PAC-1224: 571,668 cycles.



Yeahdoug,



Here is the whole thread..

http://www.speedtalk.com/forum/viewtopic...726b3399799cfa1



Chris..

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Chris'sBarracuda] #661279
04/06/10 09:54 PM
04/06/10 09:54 PM
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Belpre,Ohio
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CHAPPER Offline
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Sounds familiar,,,Engine Works, available @ Nickles Performance in Tenn. #985-16 spring will get you about 225# @ 1.95". I have used them alot on small block Chev. They will go around 680# open and are good to .720" lift @ 1.95". I will have to look later,, but I think the #987 will give you more seat pressure with similar open pressure. Possibly a + .050" loc with the 987 to get where you want to be. I have had good luck with the 985 for years, usually good for a season on dirt track motors. Probably a LOT more on drag applications. Forgot to add, VERY affordable @ $200.00+- few bucks.

Last edited by CHAPPER; 04/06/10 09:56 PM.
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Cab_Burge] #661280
04/07/10 02:11 AM
04/07/10 02:11 AM
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Aurora, Colorado
451Mopar Offline
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This is the Crower Ti retainers I used with the 1225/1325 PAC springs:
Crower #86067D-16. 1.500 od, 0.725id, cost $239.95 from summit racing.

http://www.summitracing.com/parts/CRO-86067D-16/

Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: 451Mopar] #661281
04/07/10 11:57 AM
04/07/10 11:57 AM
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pa
572charger Offline
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comp 943 springs set at 1.950 are 235-240 on the seat ! ive got a roller cam 720 lift, got 4 years of racing and street driving work perfect 9.60s at 141.75 and they don't wear stuff out and no broken parts !!!!!!!!


606 hemi pump gas best 9.60 at 142mph on motor
05 hemi daytona 1500 go-mango 4wd quadcab
2007 hotrod mag pump gas drags runner up, roadkill nights dodge big tire winner 2018 2019 back to back
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: 572charger] #661282
04/07/10 12:12 PM
04/07/10 12:12 PM
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Bend,OR USA
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Cab_Burge Offline OP
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The springs on there where Comp 1.550 roller springs, I don't remember the number, sorry. They have lost between 25 and 30 lbs pressure on the seat(275 lbs. to 255) and over the nose( 675 lbs. down to 250 lbs), which is probally no big deal on most motors. This motor broke a 3/8x.083 pushrod during the first set of dyno test, it also hurt the cam and broke the top off of one set of rollers. I fixed the motor and ended up replacing the 3/8x.083 pushrods with a set of 3/8x.120 wall Manton sereis 5 during the next dyno tests, the pushrods made 8 hp more and 7 ft. lbs torque gradually from 4200 all the way up to 6500 RPM. This leads me to thank, especially after talking to Terry Manton, that a bigger, stronger pushrod is needed along with some more spring pressures. The cam lobes are capable of 9000+ plus according to the folks at comp Cams Hopefully I'm not a dead horse The rockers are a set of T&D 1.65 ratio on both sides. The new springs are on the way and I will dyno it again to see what is does after freshening it up. It burnt two pistons up on the last dyno session,but that is another story.


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 1.550 valv e springs, 250+seat and 700+ open? [Re: Cab_Burge] #661283
04/07/10 12:32 PM
04/07/10 12:32 PM
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Left Coast
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Quote:

Quote:

Quote:

I bought a set of the PAC springs, see the first post for the details. Thanks to all for the help




You may know, Cab, that PAC is all Jason uses on our motors and we buzz them pretty high.


I did not know that, the last time I talked to him(a long time ago,4 or 5 yrs) about valve springs he was using Manley, Nextext and some Crowers, I think. Thanks for the heads up BTW, how you guys do in Bakerfields, Doug won't answer his shop phone when I call I figured he lost or screwed up and is ashame to talk to me




Got too agressive in the final and went about 6" before blowing the tires off. We're still learning how to race with turbos.

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