OEM 340 valve springs

[crackedback]

If you are using a locator, you may have to cut the guide to proper OD. If not, you are extremely lucky!

No chance a factory 340 spring is good enough for a XS282S camshaft.

 

[4spdragtop]

Stock valves(3/8), ex are new, 4 groove keepers on both. Guides are new(25 years ago lol)

Just curious if you're using stock valves with four groove keepers or if you've had the heads machined for 11/32 or 5/16 guides and if so what kind of locks you'll be using.

 

[4spdragtop]

Those do seem like a good price. I see they are singles, not doubles?? Any concerns with that? Also with Comp specs I dont see any ratings for lift? Can I use installed height - (coil bind height + 0.050") = lift?
In this case 1.70 -(1.125" + 0.050")= 0.525" lift??
So cam has 0.495" lift and .022 lash = 0.473", which would leave me a "safe" of 0.052" give or take? Take into account stock factory adjustable rockers that these mathematically would be good.
Also you mentioned shim to bump up seat psi which would decrease the installed height so that would tighten my 0.052" slightly?
Am I way off here??
Thanks again...still trying to grasp.
Appreciate all the help folks!
COM942-16 Valve Springs 21870

COM942-16 Valve Springs 21870
Shim them .015 to get the seat and open right.
Good deal @67 bucks

 

[Garrett Ellison]

I looked MOPAROFFICIAL’s post at number 19 but my for whatever reason his link came up as a different comp spring, I must have entered the numbers into summit’s search. His figures are spot on, use this calculator and the .015 figure for new opening to see your seat pressure. Calculate Valve Spring Pressure at New Lift - Wallace Racing I wouldn’t have posted anything else past that point other than to ask @MOPAROFFICIAL : Are these okay with stock retainers and locks or do they need upgraded in this application?

 

[4spdragtop]

Thanks Garrett, yes I saw that too(Comp spring), sold thru Herbert's AND cheaper than Comp?
Is my "formula" correct for figuring "safe" valve lift? Some springs have it in their specs and some dont.
I'll take a look at Wallace link too, thanks

I looked MOPAROFFICIAL’s post at number 19 but my for whatever reason his link came up as a comp spring, I must have entered the numbers into summit’s search. His figures are spot on, use this calculator and the .015 figure for new opening to see your seat pressure. Calculate Valve Spring Pressure at New Lift - Wallace Racing I wouldn’t have posted anything else past that point other than to ask @MOPAROFFICIAL : Are these okay with stock retainers and locks or do they need upgraded in this application?

 

[Garrett Ellison]

Where you have had a valve job done, you need to measure and see what your installed height is at the moment. Also, have the guides been cut down for extra clearance?

 

[4spdragtop]

Ok, so measure existing setup then? Will that give me a baseline to use to transfer to new springs/locks/retainers?
Sorry for all the questions, trying to wrap my head around it all.
I'll get measurements in a bit.

Where you have had a valve job done, you need to measure and see what your installed height is at the moment. Also, have the guides been cut down for extra clearance?

 

[Garrett Ellison]

I would probably go ahead and get a set of these, too. Peace of mind and such, pulling locks through a retainer and dropping a valve isn't something I'd want to see anyone deal with. Measure your stems, I'm confident they should be .372, but I've been wrong before.
HERR7-3/8 7 Degree 1.437 Chrome Moly Steel Retainers 10180
COM604-16 7 deg. 3/8 4 groove Valve Locks

 

[4spdragtop]

I dont believe guides have been cut down. Measuring from top of guide to spring seat area is approx 1.170", measuring from top of guide to raised area(not sure the name) is 1.0470".
Yes, valve stems are .372.
I measured installed height on both an intake and ex. Approx 1.700"-1.720".
The springs were shimmed(0.060"), but I didnt use them at all in the measurements.
Machinist is a mopar racer, well known around here and unfortunately going to retire soon....

Where you have had a valve job done, you need to measure and see what your installed height is at the moment. Also, have the guides been cut down for extra clearance?

I would probably go ahead and get a set of these, too. Peace of mind and such, pulling locks through a retainer and dropping a valve isn't something I'd want to see anyone deal with. Measure your stems, I'm confident they should be .372, but I've been wrong before.
HERR7-3/8 7 Degree 1.437 Chrome Moly Steel Retainers 10180
COM604-16 7 deg. 3/8 4 groove Valve Locks

 

[AJ/FormS]

If this is for a streeter
that cam, IMO is a catch-22; lemmee explain.
To get the power it can make, you gotta rev it. But if you rev it, you gotta control the valve train. In the mean time, the bottom-end goes soft so you gotta plan for that with a high stall. Then, because the power is way up there, unless you get big gears for it, you cannot get to that rpm in any other gear but First, until you are seriously speeding.
Have you considered this? Jus asking.

 

[Garrett Ellison]

That’s a four speed car isn’t it Steve? What gears are you running?

 

[4spdragtop]

No it's the 67, auto and 323 gears. I would like to upgrade both the stall and gears to 355.

 

[4spdragtop]

Ok, spoke to Comp today, he echoed the sentiment that MOPAROFFICIAL and Garrett Ellison recommended for my desired use(99% street and1% track(on the bucket list), that springs 942-16 would be good.
Single Outer Valve Springs: 1.437
That being said, my stem size is 0.372, I can go with Comp 10* retainer 747-16
10° Steel Retainers: 1.437
And 10* 4 groove locks
Super Locks™: 10° Angle, 3/8
And Comp 0.015 shims
Spring Shims: .015

I could also go thru Herberts for Comp stuff, seems like better pricing.
Also Herberts has the 3/8 7* retainers and locks(Comp 604-16) like Garrett mentioned.
HERR7-3/8 7 Degree 1.437 Chrome Moly Steel Retainers 10180
and 7* locks.
COM604-16 7 deg. 3/8 4 groove Valve Locks

I have a member with a used set of Trick flows. They appear to me that they are very similar to Comps 942
Trickflow springs #TFS16942-16
Trick Flow® by PAC Racing Single Valve Springs TFS-16942-16
Trickflow Retainers TFS-51400423
Trick Flow® Steel Valve Spring Retainers TFS-51400423

Thanks to everyone, continuing to learn!

 

[4spdragtop]

Cam card....damned pdf's rarely work on this phone...

 

[mopowers]

Here ya go:

 

[4spdragtop]

Thanks, howd you do that? Comp emailed me the card....I downloaded it from my email(on my phone) and then uploaded to here. Like I said pdf's(adobe) are hit n miss for some reason....
Thanks!

Here ya go:

View attachment 1715876628

 

[mopowers]

Thanks, howd you do that? Comp emailed me the card....I downloaded it from my email(on my phone) and then uploaded to here. Like I said pdf's(adobe) are hit n miss for some reason....
Thanks!

No problem. I use the "snipping tool" to grab a screen shot (one the pdf is opened), then just copy and paste it here.