I set my 632 motor up with Manley 221448 valve springs at 2.105, as I had clearance problems with a little bigger cam. After getting it put together I noticed the engine was very hard to turn. I started checking things and even though the springs were supposed to be set up at @.060 to coil bind which was 1.142, the bind measured at 1.168. So then I started looking for a 2.100 spring that had a coil bind bind number of 1.130 or less. I have 2 questions: Is this an anomaly, and does the only spring I could find (PSI 1248's) have the same problem with bind numbers being less than accurate? I don't any room to go to 2.150 as I am using lash caps and they won't work with the +.050 or +.100 retainers. It's an aluminum block with and the cam lift is .917 intake, .892 Exhaust, less valve lash. Valve lash is .016-.024. Any help appreciated.

They may have .050 keepers for those retainers.

Here's the specs on the Manley 221448 springs, for starters.

What's the intake lobe lift on the cam card, and rocker ratio?

These springs should be perfect.

I've seen the chart. The lobe list is .524 intake, .485 Exhaust. 1.75 ratio I, 1.85 Ex.

Curley,
I tried the .050 locks, but the lash caps don't fit.

quote:

Originally posted by bbtommyd:
I've seen the chart. The lobe list is .524 intake, .485 Exhaust. 1.75 ratio I, 1.85 Ex.

I know you've seen the chart but you want help right? The easier to read this is, the better the chance you get help.

I've never gotten springs the specs were wrong. What do you need .030 more for coil bind? Can you take 030 shim out? How much seat pressure do you need? 350 seems like you'd have a little room. How much seat pressure do you have now?

How much shim do you have now?

The Specs on this spring say it should be perfect.

Someone else weigh in I've never seen specs on springs wrong.

You sure your installed height is correct?

Manley making springs in china?

They put the wrong springs in the box?

Did you measure the installed height or the machine shop - engine builder?

This message has been edited. Last edited by: Mike Rietow,

I appreciate the help, don't get me wrong. I don't have any shims. We put the springs on the spring checker and they were actually binding at 1.168 instead of 1.142. That's where the problem is when I am installed at 2.105. If my math is right, the the spring is in at 2.105, the gross lift is .917, .892, and the spring is actually binding at 1.168. If I take 2.105-1.168 that leaves .037 to spring bind. Because this a tight lash cam, they want it to be .004-.012 cold. .041 total intake lift is the problem. I would like a spring that actually had 1.130 to coil bind instead of one that said 1.142 and was actually 1.168. The only spring I can find is the PSI 1248 as it has better seat and open pressure. It's 375 on the seat and 1045 open, as opposed to .330 and 1005.

You gotta set the lash tight, when the engine is cold, because of the aluminum block. When it's warm 1.142 will be fine. You just need the spring as advertised.

The 1248 PSI spring will work as well. We have a camshaft similar to yours in a sbc I just did PSI springs, It's 400 plus on the seat and 1400 plus open, 375 1045 won't hurt. PSI is a better spring anyway, depends on your wallet. Anywhere from 060 - .100 to coil bind is what you want.

Did the spring rates look correct (per specs) on the spring tester? Take a caliper and measure the spring wire diameter, is it to spec?
Thinking as Mike mentioned, possibly the wrong springs got placed in the right box, would not be the first time it's happened.
It they measure to specs I would call Manley.

quote:

Originally posted by FootbrakeJim:
Did the spring rates look correct (per specs) on the spring tester? Take a caliper and measure the spring wire diameter, is it to spec?
Thinking as Mike mentioned, possibly the wrong springs got placed in the right box, would not be the first time it's happened.
It they measure to specs I would call Manley.

I was joking about the springs made in china kinda, but apparently it's true,I read up on them, this is a common problem. Buy a set of ISKY gold stripe springs, you won't have this problem.

Before receiving another box of the Manley's. I'd go PSI 1248, apparently you can count on the specs PSI as well.

Thank you for your help. I am ordering a set of 1248's from PSI today. Just to clarify, we grabbed another new box of Manley 221449 springs and checked them. They were the same. the extra .038 to coil bind should help as we are shooting for the .060-.090 spec.

quote:

Originally posted by bbtommyd:
Thank you for your help. I am ordering a set of 1248's from PSI today. Just to clarify, we grabbed another new box of Manley 221449 springs and checked them. They were the same. the extra .038 to coil bind should help as we are shooting for the .060-.090 spec.

Anytime. Keep up the good work.

I meant to say 221448's. I use 221449's on my other 2.200 stuff.

Always check actual NET lift at the retainer with loaded spring with lash,Bend,and Flex .It will never be what the cam card says.Bill C.

Two questions....are you using digital readout on a tester for your CB measurements? And have you verified the steps in the retainer match the spring perfectly?

Call Ken Jusczyk at Motorsports Unlimited on Monday afternoon 216-398-4156 He is the valve spring king..Has every retainer, locks, cap
He will make it work if possible....Doesn't advertise, doesn't need to...Engine Builders from everywhere buy from him...Great problem solver.

quote:

Originally posted by bbtommyd:
Curley,
I tried the .050 locks, but the lash caps don't fit.

I fought the lash cap problem for a while. So here ya go. Manley 13198-16
11/32 valve, 10* keeper +.050, for lash caps
https://www.summitracing.com/parts/man-13198-16

Dave

If using a DRO (for height) on a spring tester you must correct for the travel of the pressure sensor. You throw a spring in there at 0#/0.000 height it will gain height by the movement of the hydraulic cylinder used for pressure sensing. Having an archaic Rimac I always set the height stop with a spring in the expected resultant range (a spare) and a preset telescoping bore gauge. Checking bind will be different but the "gain concept" is the same. My other is an intercomp and you can crank it down to 270-300# at 0 height then set 0 on DRO. The .010-.015 may be coming from this anomaly.