62-64 409 - Impala Tech
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post #1 of 4 (permalink) Old 06-14-2017, 02:03 PM Thread Starter
 
 
Join Date: Jun 2017
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Smile 62-64 409

I am a new member, so go easy on me.

I am doing my research on purchasing a 62-64 409 for pleasure and was wondering how the extra 400 pounds the 409 carries as opposed to the 327 affect the overall handling of the car. Seems like the 409 is going to be a little nose heavy. Any thoughts in this area. I am 70 years old, so my hot rodding days are over, however I just sold a Corvette Z06, so I still like the thrill of going fast.

Thanks, Gary
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post #2 of 4 (permalink) Old 06-14-2017, 02:47 PM
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Welcome to the Team Gary!

The difference in weight between an all cast iron BBC and an all cast iron SBC is 232 pounds. The front springs are different between the BBC and the SBC, as are the shocks. A front sway bar was an option but not installed unless you ordered the F-40 heavy duty suspension package.

A 409 car motor is a rare find these days. Verify the application code on the front shelf to verify the motor belongs in a car and not a medium duty truck or bus. The truck block is stronger than the car block used to be but has a notch cut in the block to reduce compression (not a bad thing with today's poor gas quality). You can add higher compression pistons that are actually lighter than stock ones as there is less metal on the piston deck as you close the in piston combustion chamber. Makes for a good combination with a truck block.

There are five different "W" motor heads; two for the 348 and two for the 409 car and a 409 truck head. They are not exactly interchangeable but can be interchanged if you want. Of course the late Vic Edelbrock made a set of aluminum heads for the 348-409 motor that accepts a tri power (only available on the 348), or a dual four barrel intake (the 425 horse option) in addition to the single carb manifold all cast in aluminum which sheds about 187 pounds off the nose when you also use Vic's aluminum water pump.

Rod bolts are the Achilles heal of this motor and every 409 I grenaded in my youth lost the big end of the rod. Wish you luck in finding what you want. Personally I would look for the perfect body and let the power train sort itself out later.

Big Dave
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post #3 of 4 (permalink) Old 06-15-2017, 11:13 AM
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Quote:
Originally Posted by 6506gary View Post
I am a new member, so go easy on me.

I am doing my research on purchasing a 62-64 409 for pleasure and was wondering how the extra 400 pounds the 409 carries as opposed to the 327 affect the overall handling of the car. Seems like the 409 is going to be a little nose heavy. Any thoughts in this area. I am 70 years old, so my hot rodding days are over, however I just sold a Corvette Z06, so I still like the thrill of going fast.

Thanks, Gary
Gary,

If you are only interested in the 409, what I'm about to suggest is of no use to you. But, if you are looking for '409 performance', it is quite easy to mimic, or exceed, the torque and hp of the 409 with a 383 sbc. It's likely also less expensive and less risky.

When I was deciding on an engine for my 63 Impala convertible, my goal was to (in general) replicate the 409 performance. I chose 383 sbc that dyno'd at a max 445 lbs-ft torque at 3800 rpm, and had 400+ lbs ft at 2500 rpm (the lowest rpm noted). The hp max was 385 at 5400 rpm. Ideal for what I was seeking. And it's almost 300 hundred lbs lighter (including the aluminum heads) than the 409. Mated to my 4 speed Muncie, its a joy to drive.

Just trying to be helpful.

Pete
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post #4 of 4 (permalink) Old 06-19-2017, 06:55 PM Thread Starter
 
 
Join Date: Jun 2017
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Hey Pete,
Thanks for your reply. If I can't find an original car, your suggestion is well taken.
Gary
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