Hello all....I have a 68 440 hp engine...I was wondering just how much HP would I get from installing a edelbrock performer intake,holley 750 cfm carb , headers and a MP cam 292 dur / 509 lift...Mp elec ignition....the heads are stock ..I am freshing up the engine to put into my 69 coronet...and wondered if this would be a good start on getting more power....any advice will be greatly appreciated.  

hello 69. assuming factory 10 to 1 compression ratio I would think hp would come in around 425 to 450hp at the crank depending on engine condition. I would scrap the .509 for the hyd lunati voodoo 305 series cam.have the heads checked out for sunk valves and if they are worn have them machined for 2.14 1.81 ss valves and hardened exhaust seats.I would go with a 850 mech. secondary holly.2 inch tubes and 3.5 collector headers,remember internals have a life cycle so if you use stock rods have them checked for straightness, magnafluxed, and rebushed,for the price you can almost buy new eagle rods with 7 1/6 bolts which will require minor block notching.I would also use adjustable pushrods or factory style adjustable rockers and the lunati lifters that come with the cam . set preload on lifters at .020 as it will give you around 500 more rpm on the top end ,on the intake your borderline single plane, dual  plane,I would use the M-1 single plane or the team g intake but this all depends on your rear gearing.the m.p distributor is great .They have the fast advance curve built into them and are simple to install just make sure you have 38 degrees or a tad less with full advance in by no more than 2500 if running pump gas.I reccomend a mix of 110 and 93 premium and 38 degrees .a minor bowl blend and good valve job is also reccomended. If your using an original fuel tank make sure your running a 3/8 fuel sending unit and line to carb. I think a carter mech hi flow fuel pump would work fine.now were in he 550 hp range at the crank, which should bring you down into the 11s depending on rear gearing and converter. Thats my view, hope others jump in to help you out, any questions ,just ask, hope this helps.ps this combo is quite streetable.  

silly me. have heads checked for straightness and also check guide wear,seals and retainers for wear.even if heads are straight have them surface milled just so you get a good seal on the heads to block, its gonna be a screamer!again take care  

Hey thats what I was looking for.....thank you very much......Also I was on 440 source's website and they have a set of alloy heads....do you know anything about these....from what I saw everywhere else $899.00 a set assembled...seemed low compared to MP and edelbrock...I believe they are a 84cc chamber...Im on a bit of a budget so I am looking for the most bang for my buck....thanks again for the previous advice.  

I have heard about the new heads  but havnt as of yet inquired on quality or flow numbers.If you want bang I got a 800 hp combo but would require block filling, main studs new aluminum or steel caps,girdle, align bore, bla bla bla,$900 a set is cheap completely assembled for sure and you have minimal valve jobs, 1,.. but just remember your engine combination has to be able to use these flow #s for optimum performance.call brandon and tell him your intentions. hes a good guy and will hook you up with your needs, I hear they have a new block coming out also, heh, yay to us big block guys yahooo,indy also sells a basic 452 casting with bigger valves and a lil bowl work,take care  

$899 is dirt cheap for sure..  

just remember a strong top end and a weak low end wont last long so I would reccomend a rebuild if you want it to last.any questions on clearances and tolerances for your application if you rebuild just ask.  

What is the max lift cam I can use with stock 906 heads....I am being told that the 509 MP cam will be too much for these heads...and also..will I need to change the rocker arms to adjustable with different push rods??.....Too many people telling me different things..

Thanks  

simple, no,the mp .509 wont be too much for these heads.Its all in what you do to the 906 heads that dictate flow .I know guys running in the hi 9s using the 906s with .680 roller cams, for the 509 a mild bowl blend would be nice,larger ss valves would be nice and with the stainless exhaust valves you dont need hardened seats. good 5 angle valve job, proper springs for the tiny .509 and your good to go, stock heads with stock valves will work with the .509 but there are better choices than the 509. the lunati 304 or 305 are both better cams than the M.P. cam jeez,, adjustable pushrods are a great idea ,set them up for .020 preload and it will add another 500 rpm to the top end, whoever is giving you this advise is an idiot.10.5 to 1 ,correct engine combo ,converter, and rear gearing you can make a good 550 hp just use the factory type banana groove type adjustable rockers.  

mp .509 292 degrees duration lobe sep 108.050 248 248 lunati 304, 494 int. 513 exh.duration 268 int 276 exh. lobe seperation 108,,,lunati voodoo 305,284 duration int 292 exh. .050 242 int. 252 exh.lobe seperation 108. the 305 and 304 have more lift, less duration, steeper ramps ,revs like a solid ,the lil 304 has more balls than the .509 and less duration while the 305 simply would flat out smoke the old .509 fact....go with the 305 and do a lil head work and keep compression around 10.5 to 1 and find a real engine builder  

lunati 304 voodoo specs,494 int.513 exh.lift. 268 int duration 276 exh.duration at .050 226 int 234 exh.108 lobe seperation..... lunati voodoo 305,284 int.duration 292 exh. duration at .050 242 intake 292 exh. 108 lobe seperation,your gonna have to cut the guides down with the .509 or find a single spring with more pressure and correct height, or just use a single spring with the lunatis. so folks, lets discuss this.I would snag the 305 bro but im open for discussion.  

20 minute delayed post? wtf  

buy used factory adjustables for anything over .500 lift so you can set correct preload for max performance anything smaller is not puttin out enough hp to matter  

yeah, I like to bs, thanx, 69 make sure your machinist checks keepers to valve guide clearances,allow .100 if you decide using any hyd cam over .500 lift and make sure clearance is taken at max lift.If ya decide mechanical with dual springs ya have to cut down the inner spring seat evenly to the outer spring seat. applies to hyd cams also if you decide on dual springs..Give this info to your machinist,also tell whoevers blowin smoke up your a.. that the .509 has too much duration and will reduce driveability and idle like chit.your also gonna need valve notches in the pistons unless your running 8.5 to 1 compression, heh,adjustable rockers are cheap and allow you to set proper preload pushrod and is simple to do.better consistancy, more races won.This will get you into your range and a lil more actually of a good 475 500 hp engine easily. If you use a ported 906 add another 50 hp if the guy is good,dont listen to the bs ,ive built a few engines ,just find a good machinist.  

any thoughts big?