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Cubic inch and what heads are you breathing through? Exhaust set up? What do you consider your max rpm?
406 cubic inch, Afr220 race ready heads 2.10 in 1.60 ext valve. Here are the advertised flow numbers. Intake,.200/155,.300/210,.400/260,.500/295,.550/304,.600/312, .650/318. Ext = .200/116,.300/162, .400/204,.500/220,.550/225, .600/229,.650/233. Flow numbers. Headers are 1 7/8, 3.5 collectors. Full length. And really don't want to go above 7400 rpm. If you need more info please let me know and I greatly appreciate your time to help me with this, looking forward to hearing back from you. God bless. Robert
406 cubic inch, Afr220 race ready heads, 1 7/8 full length headers with a 3.5 collector, really don't want to spin it past 7200 to 7400 rpm. The flow numbers that arf are showing are. INT. 200=155, .300=210 , .400=260, .500=295, .550=304, .600=312, .650=318. EXT = .200=116,.300=162,.400=204, .500=220, .550=225, .600=229, .650=233. They are 65cc. 12.9 to 13.1 compression with 6inch rods, 3.75 stroke, Hurricane intake 850 carb, 1.6 rockers with stud girdles, 4to4500 stall, 350 trans, 430 gears, 28×10.5×15 slicks, truck weighs 2850, drag race only.
I would like that if he is willing? Converter is a fti, yes I am considering having it put on a dyno, pistons are srp forged with 1/16, 1/16, 3/16. I had a Howard's 640 645, 263/273@.50 106lsa, in another 406 we built last year, I did get ahold of MJ on recommendation for a cam twice, about 2mths apart and got 2 different answers, not sure if it was what he recommended or someone else working there??? But I would like to have him grind me one, just unsure what one. Soon as I get home I'll show you the choices from 4 different places and maybe I can get help deciding. Thanks to all for reading and posting, I'll be back shortly.
Howards Cams, Steel Billet Mechanical Roller Camshaft, Chevy SB 262-400, 255/261 @.050, .600/.620 106 LS, Small Base-Competition Products
Howards, Mechanical Roller Cam, Chev SB 262-400 1955-1998 Small Base Circle Advertised Duration: 287/293 Duration @ .050: 255/261 Valve Lift w/1.50 Rockers: .600/.620 Lobe Separation Angle: 106 Intake Centerline: 102 Valve Lash: .022/.022 3800-7800. Good mid-range horsepower, rough idle. Needs...www.competitionproducts.com
https://www.competitionproducts.com...-Base/productinfo/HRC111113-06S/#.ZBcJjlNOkzQ -this is the one I favor and have driven in a similar motor with 13:1.
Howards Cams, Steel Billet Mechanical Roller Camshaft, Chevy Small Block 262-400, 263/275 @.050, .640/.630 106 LS-Competition Products
Howards, Mechanical Roller Camshaft, Chev SB 262-400 1955-1998 Advertised Duration: 295/307 Duration @ .050: 263/275 Valve Lift w/1.50 Rockers: .640/.630 Lobe Separation Angle: 106 Intake Centerline: 102 Valve Lash: .022/.022 4200-8200. Strong mid & upper end torque & HP. Needs 12.5:1 CR-up. All...www.competitionproducts.com
Rick can give you some great graphs if he is up for it. What brand stall are you considering? Are you going to dyno this motor? What kind of ring package?
Were you happy with the 263/273 Howards?
Honestly I never got to drive the truck and see how it performed. Here's what a few cam companies offered. A=264/272 @.50.688 lift 107lsa. B= 266/274@.50 672/656 lift,109.5 lsa,106Icl (109.5+3.5). C=260/267@.50 686/685 after lash with 1.6 rockers110Lsa. D=254/258@.50 660/659 after lash with 1.6 rockers 110Lsa. There all with 1.6 rockers.
I like a tighter LSA 108. A or B on a 106-108 personally, or the other Howards I liked.
Thank you for talking with me, do you know what hp and trq your 406 had ??
Does anyone else have any input or advice about what cam I should use, Thanks to everyone.
690hp at 7000 and 600tq at 5700 iirc
And you said you had that howards cam in it. That's sweet
