Just bought TSP 233/239...918's or dual springs??
01-21-2005, 02:27 PM
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Just bought TSP 233/239...918's or dual springs?? Okay guys, I did a search and couldn't really come up with anything conclusive, so I throw myself to what I know is deep knowledge on this board. Given that the TSP is 233/239 603/600 is a dual spring really necessary? I read that originally 918's were listed as good to .625 but changed to .600 when Comp brought out the 921's. I have read all the advantages of a beehive spring and don't want to give that up by going dual spring if I don't have to. Going dual is actually cheaper in a PRC kit, so it's not a cost issue. It's more a "is it necessary or really just overkill to be safe" type question. Any and all feedback welcome and FWIW the guy at TSP said go dual, but I know I've read Jason to say the 918's are okay? How about stories from the street gang, those in the know, Big cammed guys share please !
01-21-2005, 05:10 PM
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THAT-A-BOY JIMMY! I knew it wouldn't take long till you broke down and bought something else for the Z! The PRC's seem to be a nice spring, decnet price, and nobody seems to have troubles with them. I would also look into the Comp 987's also, but stay away from the 941's, have heard horror stories about them breaking and destroying the motor.
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01-21-2005, 08:15 PM
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Originally Posted by Hardtop00SS
THAT-A-BOY JIMMY! I knew it wouldn't take long till you broke down and bought something else for the Z! The PRC's seem to be a nice spring, decnet price, and nobody seems to have troubles with them. I would also look into the Comp 987's also, but stay away from the 941's, have heard horror stories about them breaking and destroying the motor.
01-22-2005, 03:51 AM
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Originally Posted by Nasty N8
Dual all the way 918's have a hard time with anything over .575 lift.
Nate
Nate
With proper install, good lifters and accurate geometry, they WILL handle their advertised #'s and a little more.
01-22-2005, 09:58 AM
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I guess maybe a better question would be has anyone here broken a 918 ? And if so, what mileage on what camshaft. I'm already figuring to replace them once every 10-15k so no biggie there. Actually I'll probably upgrade to better heads by the time the 1st change would be due if not before......
01-22-2005, 10:59 AM
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yes heads are a must with that cam! This is the same cam I'm running with my heads, hope it makes some decent power! What heads are you thinking of running?
01-22-2005, 11:06 AM
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Not sure, might be a while, I'm looking at all the other costs I'm going to have to do this right...LS6, asp pulley, ported pump, roller t/c, all valvetrain, ported t/b. etc. It's going to hurt the piggy bank pretty quick, but I figure I'll see how well I can do on the 98 heads with this cam and then get TEA stage 2 5.3's or similar & see....I'm probably already looking at shattering my 7.5 as it is.... 
