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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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Joined: Aug 2003
Posts: 43,118
Bend,OR USA
Cab_Burge
OP
I Win
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OP
I Win
Joined: Aug 2003
Posts: 43,118
Bend,OR USA
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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)
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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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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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I am using the PAC-1225 springs. http://www.pacracing.com/1200_Series-Dual_Springs.htmlOD = 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.
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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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Joined: Feb 2007
Posts: 6,295
U.S.
moparniac
master
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master
Joined: Feb 2007
Posts: 6,295
U.S.
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I never understood why people say T&D's are better than harlands........
Mopar Performance
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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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Joined: Dec 2006
Posts: 3,667
Arizona
Chris'sBarracuda
master
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master
Joined: Dec 2006
Posts: 3,667
Arizona
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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.. 
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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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Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem
master
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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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.pdfIf 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.
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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
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Joined: Feb 2004
Posts: 1,093
Long Beach, CA
Mike Swann
super stock
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super stock
Joined: Feb 2004
Posts: 1,093
Long Beach, CA
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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
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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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Joined: Aug 2003
Posts: 43,118
Bend,OR USA
Cab_Burge
OP
I Win
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OP
I Win
Joined: Aug 2003
Posts: 43,118
Bend,OR USA
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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)
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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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Joined: Apr 2007
Posts: 2,026
Trumbull,CT.
jim sciortino
top fuel
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top fuel
Joined: Apr 2007
Posts: 2,026
Trumbull,CT.
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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.
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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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Joined: Oct 2007
Posts: 4,206
New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,206
New York
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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
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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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Joined: Dec 2006
Posts: 3,667
Arizona
Chris'sBarracuda
master
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master
Joined: Dec 2006
Posts: 3,667
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..
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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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Joined: Jun 2009
Posts: 705
Michigan
Hemiroid
super stock
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super stock
Joined: Jun 2009
Posts: 705
Michigan
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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.
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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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Joined: Jan 2003
Posts: 8,844
poplar bluff mo.
toplescuda
I Whine
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I Whine
Joined: Jan 2003
Posts: 8,844
poplar bluff mo.
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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
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