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Spring Pressures #1362400 12/31/12 06:32 PM 12/31/12 06:32 PM
Joined: Nov 2012 Posts: 358 western PA S Sb Valiant OP enthusiast
Sb Valiant OP enthusiast S Joined: Nov 2012 Posts: 358 western PA	What kind of spring pressures are you running with your 500 to 575 lift Flat Tappet cam?

Re: Spring Pressures [Re: Sb Valiant] #1362401 12/31/12 06:43 PM 12/31/12 06:43 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	You should state what type of cam... hyd, flat tappet or a roller... ramp rates would sure help also

Re: Spring Pressures [Re: MR_P_BODY] #1362402 12/31/12 06:46 PM 12/31/12 06:46 PM
Joined: Nov 2012 Posts: 358 western PA S Sb Valiant OP enthusiast
Sb Valiant OP enthusiast S Joined: Nov 2012 Posts: 358 western PA	Sorry, Flat Tappet cam.

Re: Spring Pressures [Re: Sb Valiant] #1362403 01/01/13 12:13 AM 01/01/13 12:13 AM
Joined: Aug 2003 Posts: 43,157 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,157 Bend,OR USA	Quote: Sorry, Flat Tappet cam. As Mike has said, the lobes will dictate the valve spring pressure needed, It is best to call the cam company with your grind number and ask them I have used from 110 lbs on the seats with 325 Lbs. open pressures on small lift cams like your asking about and I have used 175 lbs. on the seat with 425 lbs. opened, that was on a race cam for a 418 C.I. W2 headed pump gas small block street and srip with NASCAR lobes, we had to break the cam in with the inner springs removed, 130 lbs. on the seats and 300 lbs. opened for 30 minutes efore adding the inner springs That cam was nitrided also Find out who made the cam and call them Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Spring Pressures [Re: Cab_Burge] #1362404 01/01/13 07:01 AM 01/01/13 07:01 AM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel master
rebel master Joined: Dec 2006 Posts: 4,647 aotearoa	i used to run a 535 lift flat tappet cam & used Comp Cams 930 springs. they were 153lbs on the seat. they worked well for that cam for me, never any sign of valve bounce on the locks.

Re: Spring Pressures [Re: rebel] #1362405 01/01/13 03:18 PM 01/01/13 03:18 PM
Joined: Feb 2009 Posts: 1,532 off the grid 340B5 pro stock
340B5 pro stock Joined: Feb 2009 Posts: 1,532 off the grid	130 seat and 330 open. Would like to try a little more. Yeah, it's got a smallblock.

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