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Pampered-Z · 04-19-2006, 04:44 PM

Springs are much easier to change with the heads off, no chance of dropping a valve into the cylinder!

Actually changing springs might be a bit more involved if you don't have the information about your current springs.

You should really find out what springs are on the heads, if your not sure what the specs are on the springs change them. Also, if that 510 lift is with 1.5 rockers and you plan to use 1.6 rockers you should really change them as you'll be close to the 560 lift ( 544 lift with 1.6 rockers, that seems too close for me!)

You need to know when they bind (lift), and also the spring pressure. Higher lift and RPM cams need additional pressure. If either bind or pressure is wrong you run the chance of sticking/floating a valve and doing allot of damage to your engine.

Also, when buying/replacing springs you will need to know and check the spring hieght, so you will need a tool to do this as well as possibly needing to change the seats/locators and retainers. ( Sorry, I would offer mine, but I lent it to a freind that moved to Texas, and so did this and a few other of my tools! - I think the tool was around $100, been a while ) See if you can borrow one?

You can go to any site such as Comp cams and search for a cam with specs close to your's and get the proper spring, retainer information for use on your heads. Many vendors sell match kits that fit in the head pockets, I would this World prod. are machined to accept the larger diameter springs, but don't ASSume!

Under 600 lift you can use a single spring so the springs and retainers should be around $200 ( retainers cost more then the springs ).

JB

04-19-2006, 04:44 PM	#4
Pampered-Z Sliderule / Moderator Join Date: Oct 2004 Location: Catawissa PA Posts: 2,294 iTrader: (1)	Springs are much easier to change with the heads off, no chance of dropping a valve into the cylinder! Actually changing springs might be a bit more involved if you don't have the information about your current springs. You should really find out what springs are on the heads, if your not sure what the specs are on the springs change them. Also, if that 510 lift is with 1.5 rockers and you plan to use 1.6 rockers you should really change them as you'll be close to the 560 lift ( 544 lift with 1.6 rockers, that seems too close for me!) You need to know when they bind (lift), and also the spring pressure. Higher lift and RPM cams need additional pressure. If either bind or pressure is wrong you run the chance of sticking/floating a valve and doing allot of damage to your engine. Also, when buying/replacing springs you will need to know and check the spring hieght, so you will need a tool to do this as well as possibly needing to change the seats/locators and retainers. ( Sorry, I would offer mine, but I lent it to a freind that moved to Texas, and so did this and a few other of my tools! - I think the tool was around $100, been a while ) See if you can borrow one? You can go to any site such as Comp cams and search for a cam with specs close to your's and get the proper spring, retainer information for use on your heads. Many vendors sell match kits that fit in the head pockets, I would this World prod. are machined to accept the larger diameter springs, but don't ASSume! Under 600 lift you can use a single spring so the springs and retainers should be around $200 ( retainers cost more then the springs ). JB __________________ 93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada 1) Build it 2) Race it 3) Break it 4) Repeat!!! Last edited by Pampered-Z; 04-19-2006 at 04:47 PM.