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Too much seat pressure ?
#2401255
11/10/17 02:59 AM
11/10/17 02:59 AM
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Joined: May 2005
Posts: 2,628 Middle TN
da50r
OP
master
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OP
master
Joined: May 2005
Posts: 2,628
Middle TN
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On an average... how much pressure is too much seat and open pressure for a mild hyd flat tappet street cam? Say basically a 340 cam or a touch warmer cam. Slightly higher ramp speed but basically a 340 cam? Just curious what a 5,800 rpm street engine spring pressure should be? I don’t see a need to wipe a cam but also don’t want to float the valves at 5,300 either. Thanks guys.
360/ X heads 9:1 compression HP manifolds.
Last edited by da50r; 11/10/17 03:00 AM.
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Re: Too much seat pressure ?
[Re: da50r]
#2401267
11/10/17 03:28 AM
11/10/17 03:28 AM
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Joined: Oct 2006
Posts: 1,264 New York, USA
Chargerfan68
pro stock
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pro stock
Joined: Oct 2006
Posts: 1,264
New York, USA
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I would always go by the cam manufacturers spring recommendations. No way to know requirements based on sound of cam or looking at lobes. My 2💰
1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.
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Re: Too much seat pressure ?
[Re: da50r]
#2401272
11/10/17 04:00 AM
11/10/17 04:00 AM
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Joined: Aug 2003
Posts: 43,228 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,228
Bend,OR USA
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What type(stock or anti pump up) and brand of lifters are you going to use and what type of rocker gear and pushrods?
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Too much seat pressure ?
[Re: da50r]
#2401368
11/10/17 01:12 PM
11/10/17 01:12 PM
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Joined: Jan 2003
Posts: 14,506 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
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Pick a cam/lifter/rocker combo.......then decide on the appropriate springs.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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