Hi! my name is David and I live in Sweden. I have a 1963 catalina with a 389/four speed. Time has come to do something with the engine, it does not run like it used to!!My plan is to build a daily driver engine but with a little more punch in it. I don't wanna lose a red light race to a Miata.. hahaAround 400hp is my goal.I want to be able to run pump gas ( we have 98 octane in Sweden ) I need some advice on parts for the 389, or maybe someone has a much better idea than mine! But here is what my plan is right now:Bore for 400 pistonsEdelbrock performance RPM heads 72ccPerformance RPM intakeEdelbrock 750 carbHowards cam 221/221 @ 0.50 .470 lift Ram air 4 exhaust manifolds and 2,5 inch exhaust with H pipeStock distribuitor with pertronix ignitor.I know my engine oils through the rocker studs so I will have to block that passage in the engine block. And I will have to get a new timing cover. So what do you guys think? Is this gonna work? What brand pistons should I use? what's my comperssion gonna be? Thanks / David
Hello;Unfortunately, no it won't work. That Miata is gonna kick your as_ no matter what you do, lol. It's just one of those sickening realities of life.your plan sounds decent except for that carb. pleeeease do not use it. your life will be soooo much happier. buy an annular booster or down leg booster holley with vacuum secondaries and install the optional white secondary spring.buy an msd 6al-2 ignition box and hei distributor or msd anti vibration high voltage coil.port the heads.install arp rod bolts.i like je forged pistons. some people might use hypers.COMPRESSION - It will be around 10.5, with .030 over and 72 cc heads, that's good.http://www.wallaceracing.com/cr_test2.phpCAM - I would probably run the 60903 lunati listed below in your 10,000 lb car. Hydraulic Flat Tappet Cam. High performance street/strip cam for 350 *** motors. Excellent cam for 400- 455 *** touring type vehicles with 9:1-9:5 compression ratio. Use 2200-2400 RPM stall converter with 3.23-3.42 rear gears. Very noticeable idle quality. * Advertised Duration (Int/Exh): 268/276 * Duration @ .050 (Int/Exh): 227/233 * Gross Valve Lift (Int/Exh): .489/.504 * LSA/ICL: 110/106 * Valve Lash (Int/Exh): Hyd/Hyd * RPM Range: 1600-5800 * Includes: Cams OnlyPart Number: 10510703Previous Part Number: 60903Jobber Price: $143.73HOWARDS411421-08 CL411421-08 275 275 221 221 .470 .470 108 104 Hyd. Hyd. 1 1800-5800 Fair idle, Street performance, good low end & mid range torque.
Welcome to the forum David!Some points to note on your 63 389. Highest HP version for that year was 245HP.First thing you might consider is to buy a dyno software package and play with different settings to see what your end result would be. That will really help you decide on the right cam choice. I would pay more attention to the torque numbers than the HP numbers since your 63 Cat is going to weigh a good deal. It's going to take some torque to get it moving quickly.Your plan sounds good, but with boring to a 400 and assuming gasket thickness of .038" with a diameter of 4.205" and .025" deck height, your CR should come out somewhere around 9.6:1. boring to 4.150" and zero decking your block will get you up around 10.6:1 CR.I'd go for the complete pertronix unit and discard the factory distributor. You're going to want to rebuild the factory distributor and have it curved, so if you're going to spend the money, I'd go for the complete new pertronix unit w/60K coil. I'd have the internals balanced and port match the intake and heads. Use of ARP bolts and studs where ever you can will help ensure it stays together. I'd talk to your local machine shop and see what they recommend doing to the factory crank to strengthen it. I wouldn't be afraid of the Eddy carbs. I'm running 2 500 CFM eddys w/ 3/4" spacers on my 428 and I'm very happy with thier performance.One thing to keep in mind, building your motor is only part of the equation. What rear end do you have? Selecting the right rear end balance to match your motor and vehicle weight will go along way to winning those stop light duels.. You can also do little things like moving the battery to the trunk compartment.. try to transfer as much weight ratio as possible to the rear of the car.Just my two cents here........
I also would not be afraid of Edelbrock carbs. Been running the same 750 since 1999. Cleaned it a few times, tuned once.
I should add that from an all out performance standpoint, an EPS carb probably does leave something on the table so to speak. It is at a disadvantage compared to more recent designs but the bang for the buck is hard to beat.