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#1
08-02-2023, 02:10 PM
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How Much Spring Pressure
What is the recommended spring pressure for a solid roller 264/268 @ .050 and 176/187 @ .200. Lift .592 with 1.5 rockers and .651 with 1,65's LSA 108
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Tim Corcoran |
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#2
08-02-2023, 02:25 PM
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My Lunati solid roller cam is similar specs, 262/270 at .050 and .640 lift w/1.65 rockers. Heads were set up by KRE and the closed pressure is 220. I think Jeff gave me the open pressure as well but I can't seem to find that # anywhere. I am sure others will chime in.
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69 Bird w/1970 400 block(409 cubes), #64 heads, hyd. roller, Q-jet by Jeff E., original interior, ps, pdb, th350, and 3.73 gears. Pump gas, street driven muscle. 3800 lbs. race weight. Best, 11.39 @118, my son's car. 79 T/A w/463, Scat crank, Eagle rods, Icon pistons, Lunati solid roller, 262/270, KRE 325 heads, Northwind intake, QF950 carb, full interior, ps, pdb, th350, and 3.73 gears. Pump gas, 3650 lbs. race weight. 10.68 @ 126 so far... no tuning yet. |
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#3
08-03-2023, 01:47 PM
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As a comparison, Bullet suggested 230 on seat and 500+ open for cam attached here.
 Sent from my SM-G965U using Tapatalk
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68 Firebird-- Street/Strip - 400/461 Eagle Forged Bottom End & Ross Flat top pistons. KRE 325 CFM D port, Ultradyne 263/271 @.050, .4267 lift. Crower Solid roller lifters and 1.65 stainless rockers. Quickfuel 1000 on Torker2 intake and 2" open spacer. Hedman 1.75" headers. TH400 w/brake. Ford 9" w/3.80 gears & 28x9 Hoosier pro bracket drag radial. Best ET: 1.35 60ft, 6.29 @ 107.20 mph, 9.99 @132.33 mph. 3,300 race weight |
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#4
08-03-2023, 07:38 PM
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That is great news I tested two of my springs and they came in at 235 on the seat and 590 open at .600 lift so it looks like I am in the ball park. I will test every spring and shim as necessary. Thanks for the info
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Tim Corcoran |
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