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Old 10-16-2004, 06:14 PM
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Question Cam carb and intake for a 302

I am planning on installing a 302 and a AOD in my 65 custom 500 to use as a daily driver and since its been years since I have bought any performance parts,what would be a good matching carb, intake and a RV style cam that would increase the toque of that motor. I know its a small motor in a big car but I am looking for gas mileage and dependability not rip snorting power,the motor came from a 92 truck that had EFI.

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Old 10-16-2004, 06:19 PM
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I'd go with a holley 600 cfm carb, Edelbrock RPM air gap manifold, and since you have a '92 block , it would come with provisions for a roller cam. I'd have to check for specific cam grinds, but shoot for something like 210/216 at .050, and .480 lift. Any bigger and you will have sluggish off idle response and diminished low end torque. It's easy to over cam a small engine like the 302.
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Old 10-16-2004, 06:24 PM
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302/5.0s will feel sluggish in the up to 2,500 Rpms anyway. They don't really come alive until after that.

I would go with a Holley 650 DP or a 750 vacuum secondary. The RPM Air gap would work well, and for the cam, I would go with something that has around 220o duration @ .050" and as close to .500" lift as possible. Check your springs for coil bind. It happens somewhere in the .510" range on 5.0s.
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Old 10-16-2004, 08:51 PM
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As you stated, your Galaxie is a big car... the 302 is a good engine... but not a torque monster. Personally for a cam, Id use either this Howards hydrulic cam: 214/214 @ .050 111 LSA .459/.459 lift
or
this Comp cams Hyd. Roller: 270HR 215/215 @ .050 110 LSA .533/.533
The roller would be the way to go if its in the budget.
Id use a Performer intake rather than the RPM...smaller plenum..smaller runners = velocity=helps recover torque @ low speeds.
Same logic for the carb..Personally, Id use a 500 CFM carb. Im assuming this engine wont be seeing past 5000 RPMs anyway, so a smaller carb will be better suited... just my 2 cents
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Old 10-16-2004, 10:56 PM
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I'd stay more on the conservative side on the cam if you're looking for gas mileage. The hydraulic roller cam is a good idea, & there are several options. The factory roller cam on the 5.0HO Mustangs had ~208* intake duration (at .050), & I don't think anything over that would be what you're looking for in a big car. The factory 5.0 Crown Vic Standard-Output motor gets great mileage, but has a tiny little roller cam (in the 180* range) that kinda runs out of breath at around 4000rpm, but makes excellent low-rpm torque. Crane makes a couple in between those two. I think the later Ford Explorer 5.0 roller cam is also in between, but I don't know for sure.
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Old 10-16-2004, 11:07 PM
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I doubt that the motor would see 4000 RPMs as its going to have a some what tall gear in the rear,I was told even though the motor is a 92 truck motor that there is a possibility that it does not have roller lifters. I presume that roller lifters require shorter pushrods but do they require different rocker arms and I was thinking about getting a 351-w but I have the 302 and thats what I will use unless a 351 falls in my lap over the winter.
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Old 10-18-2004, 12:33 PM
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http://www.rodandcustommagazine.com/techarticles/73719/
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