Why No Protest?

Alan Roehrich · 11-18-2010, 07:10 PM

There's a limit to how much spring pressure you can use, and after that, you're just wasting power and creating problems. If you think the valve spring rule will suddenly add 1000RPM of usable power band you will be sorely disappointed in most cases.

You can only make a cam lobe so aggressive before you run off the edge of the lifter. There's already plenty of spring available to deal with that limiting factor.

It seems a lot of people thing "if a little is good, more is better, and too much is just right". That is not necessarily true with valve spring pressure.

It is not just valve spring pressure that is breaking rockers.

X-TECH MAN · 11-18-2010, 07:53 PM

Quote:

Originally Posted by Alan Roehrich

There's a limit to how much spring pressure you can use, and after that, you're just wasting power and creating problems. If you think the valve spring rule will suddenly add 1000RPM of usable power band you will be sorely disappointed in most cases.

You can only make a cam lobe so aggressive before you run off the edge of the lifter. There's already plenty of spring available to deal with that limiting factor.

It seems a lot of people thing "if a little is good, more is better, and too much is just right". That is not necessarily true with valve spring pressure.

It is not just valve spring pressure that is breaking rockers.

Lobe design causes a lot of harmonic problems. Incorrect heat treatment on some of the out of country made parts cause a bigger problem. Buy known quality parts and have them frozen and coated helps. Check your rocker arm geometry.

Rick Leininger Jr. · 11-18-2010, 09:34 PM

Good thing my lifters don't have edges. Valve springs and 6.14 gears on order.

Bobby Zlatkin · 11-19-2010, 10:39 AM

I've been under the impression that you can eliminate the damper on applications that originally can with them. Am I wrong about that?

Alan Roehrich · 11-19-2010, 10:51 AM

Quote:

Originally Posted by Bobby Zlatkin

I've been under the impression that you can eliminate the damper on applications that originally can with them. Am I wrong about that?

Before the new rule, you could be DQ'd for removing the damper, as the rule required the valve spring to be the same configuration as that listed in the blueprint specifications. So if you had an engine that required a 1.55" dual spring with damper, and you took the damper out, the spring configuration no longer matched the the blueprint specification. A tech man that was so inclined could DQ you.

Bobby Zlatkin · 11-19-2010, 11:21 AM

Thanks Alan, but I guess it's a moot point now.

Jack McCarthy · 11-22-2010, 01:11 PM

little easier for me, unfortunatley i (woody) just redid my heads...
but now can get rid of pile of shims and get behive springs...

wont make any HP difference, my SMALL CARB & INTAKE are my RPM limiter not the springs

jack

and no they wont let me run the cheater 459 intake ?

Michael Beard · 11-19-2010, 10:37 AM

Quote:

Originally Posted by X-TECH MAN

Buy known quality parts and have them frozen and coated helps.

That would be "REM & Cryo". Call Jim Bailey at FINISHED... finishedracing.com Pretty cheap insurance!

11-18-2010, 07:10 PM	#1
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,113 Likes: 1,571 Liked 1,826 Times in 414 Posts	Re: Why No Protest? There's a limit to how much spring pressure you can use, and after that, you're just wasting power and creating problems. If you think the valve spring rule will suddenly add 1000RPM of usable power band you will be sorely disappointed in most cases. You can only make a cam lobe so aggressive before you run off the edge of the lifter. There's already plenty of spring available to deal with that limiting factor. It seems a lot of people thing "if a little is good, more is better, and too much is just right". That is not necessarily true with valve spring pressure. It is not just valve spring pressure that is breaking rockers. __________________ Alan Roehrich 212A G/S

11-18-2010, 09:34 PM	#3
Rick Leininger Jr. Member Join Date: Jun 2007 Posts: 162 Likes: 0 Liked 0 Times in 0 Posts	Re: Why No Protest? Good thing my lifters don't have edges. Valve springs and 6.14 gears on order.

11-19-2010, 10:39 AM	#4
Bobby Zlatkin Member Join Date: Mar 2003 Location: Mills River, NC Posts: 417 Likes: 0 Liked 0 Times in 0 Posts	Re: Why No Protest? I've been under the impression that you can eliminate the damper on applications that originally can with them. Am I wrong about that? __________________ Bobby & Norene Zlatkin L/SA

11-19-2010, 11:21 AM	#6
Bobby Zlatkin Member Join Date: Mar 2003 Location: Mills River, NC Posts: 417 Likes: 0 Liked 0 Times in 0 Posts	Re: Why No Protest? Thanks Alan, but I guess it's a moot point now. __________________ Bobby & Norene Zlatkin L/SA

11-22-2010, 01:11 PM	#7
Jack McCarthy VIP Member Join Date: Feb 2002 Location: lyndon ky. ... louisville area Posts: 1,322 Likes: 29 Liked 476 Times in 117 Posts	Re: Why No Protest? little easier for me, unfortunatley i (woody) just redid my heads... but now can get rid of pile of shims and get behive springs... wont make any HP difference, my SMALL CARB & INTAKE are my RPM limiter not the springs jack and no they wont let me run the cheater 459 intake ? __________________ Jack McCarthy 3609 STK "the Captain"