Who cuts valves? I'm looking to get a bunch of stock valves undercut and/or back cut to have ready for my next head / valve job.
Is anyone grinding stock valves?
Who cuts valves? I'm looking to get a bunch of stock valves undercut and/or back cut to have ready for my next head / valve job.
Is anyone grinding stock valves?
Very nice.
Can you also undercut the stem just behind the valve head? Not sure how much can be gained (or how safe that is); but its legal in my class now.
How much would you charge to do 2 full sets (16 valves; 8 int, 8 exh)?
I'm not sure what area of the valve you're referring to here. Are you talking about the spot I missed right next to the stem?
I don't know what a fair price would be. I bought the valve grinder and seat cutter to do my own. My shop labor rate is $70 an hour but I don't think it would take an hour. $70 seems high to cut 16 valves. What would you be willing to pay or what do you think is fair to pay?
I believe he's asking to have the stem undercut, to decrease it's diameter and increase the flow...
Mike
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Any data on others who have done that to stock valves? By data I mean is the valve robust enough to handle the undercut like an aftermarket valve might be. Probably not a big deal on mild RPMS and weak cams.
Brent GREAT DEPRESSION RACING 1992 Duster 3.0T The Junkyard - MS II, OEM 10:1 -[I] Old - 11.5@125 22psi $90 [U]Stock[/U] 3.0 Junk Motor - 1 bar MAP [/I] 1994 Spirit 3.0T - 11.5@120 20 psi - Daily :eyebrows: Holset He351 -FT600 - 393whp 457ft/lb @18psi 1994 Spirit 3.0T a670 - He341, stock fuel, BEGI. Wife's into kid's project. 1990 Lebaron Coupe 2.2 TI/II non IC, a413 1990 Spirit 3.0 E.S. 41TE -- 1993 Spirit 3.0 E.S. 41TE -- 1994 Duster 3.0 A543 1981 Starlet KP61 Potential driver -- 1981 Starlet KP61 Parts -- 1983 Starlet KP61 Drag 2005 Durango Hemi Limited -- 1998 Dodge 12v 47re. AFC mods, No plate, Mack plug, Boost elbow -- 2011 Dodge 6.7 G56
I would be afraid of it burning valves because there isn't much material there.
Its called swirl polished, you coul try calling these guys. http://www.rpmrons.com/SIvalvescs_dodge.html
Ian Adams Function>Form 1990 shadow scrapped, too rusty:( 1991 Spirit R/T Scrapped, parts sold:( 1989 Turbo Caravan Daily beater with built-[I]ish [/I]engine slowly evolving into weekend turbo beater.
http://www.rpmrons.com/Valve%2Cprice.html
On that same site, it says undercut stems. Swirl polish is the pattern they leave on the valve head.
Brent GREAT DEPRESSION RACING 1992 Duster 3.0T The Junkyard - MS II, OEM 10:1 -[I] Old - 11.5@125 22psi $90 [U]Stock[/U] 3.0 Junk Motor - 1 bar MAP [/I] 1994 Spirit 3.0T - 11.5@120 20 psi - Daily :eyebrows: Holset He351 -FT600 - 393whp 457ft/lb @18psi 1994 Spirit 3.0T a670 - He341, stock fuel, BEGI. Wife's into kid's project. 1990 Lebaron Coupe 2.2 TI/II non IC, a413 1990 Spirit 3.0 E.S. 41TE -- 1993 Spirit 3.0 E.S. 41TE -- 1994 Duster 3.0 A543 1981 Starlet KP61 Potential driver -- 1981 Starlet KP61 Parts -- 1983 Starlet KP61 Drag 2005 Durango Hemi Limited -- 1998 Dodge 12v 47re. AFC mods, No plate, Mack plug, Boost elbow -- 2011 Dodge 6.7 G56
Rob yes stock valves are 2 piece. I think you will find on the exhaust that a tulip valve will outflow a nailhead. Can you run aftermarket valves? If so, I have found the Manley valves design to far outflow the SI's (or stock) on the flowbench. I will have to dig up a REV intake valve for a Masi 16V application. Holy undercut stem! They survive just fine too.
Todd
I wouldn't cut down the stem. Didn't Mopar make stock undercut valves? Call Chris or Cindy, their suppliers might have some.
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Ian Adams Function>Form 1990 shadow scrapped, too rusty:( 1991 Spirit R/T Scrapped, parts sold:( 1989 Turbo Caravan Daily beater with built-[I]ish [/I]engine slowly evolving into weekend turbo beater.