comp spring and retainer alternative

General engine tech -- Drag Racing to Circle Track

Moderator: Team

bobalattie
Member
Member
Posts: 146
Joined: Tue Jun 07, 2011 4:14 pm
Location:

Re: comp spring and retainer alternative

Post by bobalattie »

They claim the tool steel retainers are 33% lighter than the chromoly ones. But I haven’t had an opportunity to use them yet.
racear2865
Guru
Guru
Posts: 1597
Joined: Mon Sep 21, 2009 11:58 pm
Location: tenn

Re: comp spring and retainer alternative

Post by racear2865 »

You will find that several companies rate their spring without the retainer installed. When you install the retainer, the inner spring is compressed with the step, therefore spring pressure is higher. I prefer the lightened steel retainer to titanium.
reed
steve cowan
Guru
Guru
Posts: 2276
Joined: Wed Jul 27, 2011 5:22 am
Location: brisbane AUSTRALIA

Re: comp spring and retainer alternative

Post by steve cowan »

i have a set of dual springs that i checked this morning,but they have a spring rate of 400 lb/in.
will this kill that SFT in question??
using 1.5 RR
installed 1.75'' seat load 140psi
full lift after lash 0.477'' open load 331psi
331-140 = 191 / 0.477'' = 400.4 lb/in

using 1.6RR
installed 1.75'' seat load 140psi
full lift after lash 509'' open load 346psi
346-140=206/0.509 =404 lbs/in
i did not check coil bind but there is room as i have used these springs in a bigger Crower cam some years ago and that cam looks fine.
any information on this spring rate appriciated as i dont have enough experience to make a judgement call
steve c
"Pretty don't make power"
Walter R. Malik
Guru
Guru
Posts: 6386
Joined: Tue Jul 24, 2012 11:15 am
Location: Roseville, Michigan (just north of Detroit)
Contact:

Re: comp spring and retainer alternative

Post by Walter R. Malik »

steve cowan wrote: Tue Sep 11, 2018 5:16 pm i have a set of dual springs that i checked this morning,but they have a spring rate of 400 lb/in.
will this kill that SFT in question??
Certainly not; especially after the cam & lifter set have already been broken-in.

If those springs have enough clearance, they will work fine.
http://www.rmcompetition.com
Specialty engine building at its finest.
steve cowan
Guru
Guru
Posts: 2276
Joined: Wed Jul 27, 2011 5:22 am
Location: brisbane AUSTRALIA

Re: comp spring and retainer alternative

Post by steve cowan »

Walter R. Malik wrote: Tue Sep 11, 2018 5:23 pm
steve cowan wrote: Tue Sep 11, 2018 5:16 pm i have a set of dual springs that i checked this morning,but they have a spring rate of 400 lb/in.
will this kill that SFT in question??
Certainly not; especially after the cam & lifter set have already been broken-in.

If those springs have enough clearance, they will work fine.
thank you Walter,i will get a quality tool steel retainer to suit,i appreciate you input
steve c
"Pretty don't make power"
Post Reply