ive looked on different boards and nothign haven't seen a definate answer. i think comp recommends the 987 or 986 but they say the heads need machining. which springs should i go with

crane 10308 - heard the seats are just washers, need smaller valve seals, and use of L98 seats are recommended.

combonation motorsports ex-612 - heard they suck and are unrealiable.

918's is what im leanign towards. can these be installed on my stock seats? and which retainers and locks do i use?

 

i have that cam with the 918's and what ever retainers and locks that comp recommended so dont ask me part numbers on that
no the heads dont need any machine work

 

918's whould be what I would recommend or 977's with Ti retainers if you want to do a dual spring.

Bret

 

so the spring pressure and all the other specs are fine on those springs? i know i dont just look at max lift when choosing springs?

also should i get 10* or 7* locks. whats the difference?

 

I have the a 230/236 cam and i run the 987 did not need any machine work. and it runs great.

 

Springs like Heads aren't all about the "specs".....

A 987 is not close to enough pressure for any hyd roller lobe that plans on going over 6000rpm...

Bret

 

can i use my stock seats with 918s?

 

yup

 

Yeah or you can get some new locators from Comp....PN 4705-16

 

are the locaters any better than the stock ones?

 

Yeah they seem to fit the springs better.

Bret

 

so is this right
26918 springs
787 retainers
4705 seat
601 locks

 

One way to get there.....

Installed height is usually the problem I run into on a LT1 head with a beehive spring.