Spring maintence (pun intended)
04-20-2002, 10:36 PM
#1
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Spring maintence (pun intended)
I changed valvesprings on my 540 today. Fun , fun !
I used a different spring than last year , I actually went to a spring with a little less spring pressure. 650# open was a little much, now they are down around 580# , which should be a little easier on lifters.
It was an all day job , I had to reshim all the springs from what they were to 2.000" so it was very time consuming.
I wanted to fire the motor and do the valve lash but, the weather here in MI is supposed to get cold again and I don't want to winterize again.
Oh well just a little bored tonight and wanted to see what was up on the board tonight.
I used a different spring than last year , I actually went to a spring with a little less spring pressure. 650# open was a little much, now they are down around 580# , which should be a little easier on lifters.
It was an all day job , I had to reshim all the springs from what they were to 2.000" so it was very time consuming.
I wanted to fire the motor and do the valve lash but, the weather here in MI is supposed to get cold again and I don't want to winterize again.
Oh well just a little bored tonight and wanted to see what was up on the board tonight.
04-22-2002, 02:13 PM
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I feel your pain 26scarab, I changed my 632 Merlins on SAT. What a job, it took 2 of us about 2hrs to complete..."Tedious" probably best describs it. Didn't have to reshim or go through the lash again, (thats why I love those Jesel's) I run the Comp 948-16's; 330# on the seat, 950# opening. No need to go to the gym for a few days, that was one hell of a workout.
04-22-2002, 06:13 PM
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Hey Scarab,
How many hours did you have and what springs? How much cam lift? I am trying to keep track of comparable set ups for my own personal knowledge. I run the Comp 951 spring which is around 240# on the seat. The cam is a Comp solid roller with .714" of lift. Did you have springs break or is this a PM move? Thanks.
How many hours did you have and what springs? How much cam lift? I am trying to keep track of comparable set ups for my own personal knowledge. I run the Comp 951 spring which is around 240# on the seat. The cam is a Comp solid roller with .714" of lift. Did you have springs break or is this a PM move? Thanks.
04-22-2002, 06:25 PM
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Jdnca1,
I too have Jesel rocker arms and have the right tool for changing the springs , but it was still tedious has hell. Can you believe my legs are still sore from being contorted in the bilge for so long.
Wette Vette,
It sounds like we have close to the same cams. Mine is also a Comp , .714" intake and exhaust, 254/268 duration @.050"
I run 1.6 rockers so it is a little easier on valvetrain.
I don't know what brand springs to begin with, the had 300# on the seat and around 700# open which was way to much for a 5800rpm motor. I switched to Comp 955-16's (the 951's were on backorder) and at a 2.000" installed height they are 240# on the seat and 580# open.
I had around 50 hours on the other springs and changed them so it wasn't so hard on lifters, plus the PM thing.
I too have Jesel rocker arms and have the right tool for changing the springs , but it was still tedious has hell. Can you believe my legs are still sore from being contorted in the bilge for so long.
Wette Vette,
It sounds like we have close to the same cams. Mine is also a Comp , .714" intake and exhaust, 254/268 duration @.050"
I run 1.6 rockers so it is a little easier on valvetrain.
I don't know what brand springs to begin with, the had 300# on the seat and around 700# open which was way to much for a 5800rpm motor. I switched to Comp 955-16's (the 951's were on backorder) and at a 2.000" installed height they are 240# on the seat and 580# open.
I had around 50 hours on the other springs and changed them so it wasn't so hard on lifters, plus the PM thing.
04-22-2002, 07:54 PM
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Our cams are close. Mine is a 272/280 at .050 on a 112 + 4 installation. I am running 13:1 compression in a 496" with fully ported 325 pro 1's. I run 1.7 ratio Jesels, which are sweet. I figure I will change my springs out somewhere 50 and 75 hrs for safety's sake. Did you dyno your motor? How much HP? My motor is lake tuned only so I don't know how much power it makes. It is enough to push a Baja 210 Sport 95.6 mph on radar so I figure 700 plus hp.
04-22-2002, 08:00 PM
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Wette Vette,
Mine is also on a 112 and in + 4.
I did not dyno my current 540 .
I did dyno the 502 which had all the same components.
Merlins (ported by Sterling) , Brodix Intake, and with 8:5.1 CR the motor made 625hp @5800.
The 540 is the same except the CR is 9.25:1 .
I'm assuming that it makes around 675hp.
Mine is also on a 112 and in + 4.
I did not dyno my current 540 .
I did dyno the 502 which had all the same components.
Merlins (ported by Sterling) , Brodix Intake, and with 8:5.1 CR the motor made 625hp @5800.
The 540 is the same except the CR is 9.25:1 .
I'm assuming that it makes around 675hp.
