Spring question!
12-04-2008, 09:23 PM
#2
5th Gear Member
Join Date: Nov 2006
Location: arlington,WA
Posts: 3,743
are your afr 185's the older version with dual .550 lift springs or newer version dual .600 springs or are they different
also what cam are u going to run and is it a hyd. or solid as a solid cam and not the right spring would make the spring collapse
also what cam are u going to run and is it a hyd. or solid as a solid cam and not the right spring would make the spring collapse
12-05-2008, 12:12 AM
#3
4th Gear Member
Thread Starter
Join Date: Mar 2006
Location: CA
Posts: 1,836
im not sure what the spring rate on the heads are. dont know if they are older or newer. the cam im getting is a hyd. they guy is testing out the springs on the head and the after market ones i got.... they guy didnt say anything about a spring callapsing. he said the lifter's might..
12-05-2008, 12:10 PM
#5
5th Gear Member
Join Date: Nov 2008
Location: SC
Posts: 2,401
While opinions vary greatly on this subject it has been MY experiance that very high spring pressure on a hyd roller cam will collaspe the lifter and in some cases destroy the lifter and cam from lifter hop. At the very least it will cause the lifter to float early in the rpm range. Not knowing what springs you have or the pressure they have is a dangerous thing for your engine. The last thing you want to do is bring your spring into coil bind so the spring needs to match the cam and the intalled height needs to be checked along with making sure the retainer doesn't hit the valve seal at max lift. Comp Cams has whats called a beehive spring. In MY experiance it works great on street hyd roller cams. It causes less valve train harmonics and allows higher RPM. It also allows more valve lift before coil bind than a conventional spring does. The Beehive spring has an Ovate wire and has a progressive rate. It doesn't require a inner spring or damper. The OEM lactched onto the idea some years back.
This subject is not up to debate and is only my opinion based on years of experiance and is soley my opinion wheather it be right or wrong.
This subject is not up to debate and is only my opinion based on years of experiance and is soley my opinion wheather it be right or wrong.
12-05-2008, 07:14 PM
#7
5th Gear Member
Join Date: Jan 2006
Location: Puerto Rico
Posts: 3,926
While opinions vary greatly on this subject it has been MY experiance that very high spring pressure on a hyd roller cam will collaspe the lifter and in some cases destroy the lifter and cam from lifter hop. At the very least it will cause the lifter to float early in the rpm range. Not knowing what springs you have or the pressure they have is a dangerous thing for your engine. The last thing you want to do is bring your spring into coil bind so the spring needs to match the cam and the intalled height needs to be checked along with making sure the retainer doesn't hit the valve seal at max lift. Comp Cams has whats called a beehive spring. In MY experiance it works great on street hyd roller cams. It causes less valve train harmonics and allows higher RPM. It also allows more valve lift before coil bind than a conventional spring does. The Beehive spring has an Ovate wire and has a progressive rate. It doesn't require a inner spring or damper. The OEM lactched onto the idea some years back.
This subject is not up to debate and is only my opinion based on years of experiance and is soley my opinion wheather it be right or wrong.
This subject is not up to debate and is only my opinion based on years of experiance and is soley my opinion wheather it be right or wrong.
12-05-2008, 07:30 PM
#8
5th Gear Member
Join Date: Nov 2008
Location: SC
Posts: 2,401
Gearbanger, you may want to check this out. Read what Joe Sherman had to say about Beehive springs.
http://www.performanceproductreview....06/Beehive.pdf
http://www.performanceproductreview....06/Beehive.pdf
12-05-2008, 07:44 PM
#10
5th Gear Member
Join Date: Nov 2008
Location: SC
Posts: 2,401
I really like these springs in street/strip cars. It a real world solution for the working stiff trying to do it themselves and keep the car durable. I've used them for about 3 years now and not a single failure.