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Greg Reimer 7376 · 09-17-2022, 01:09 PM

Not to squelch a good thread, but who was tuning the 409's back then? I had a very stock 409/425 horse that was balanced, OEM replacement cam,correct carbs F&R, 4:88 gears, a Muncie wide ratio 4 speed, fender well headers' one piece drive shaft,10 inch by 29.5" slicks, and it would go 12.70's very reliably, 12.66 on one occasion.
I would leave about six grand and shift at 5300. RPMing the motor actually slowed the car down because the torque curve of that motor was pretty low RPM. We tried a Powerglide with a stocker converter and it picked up about half a second. It wasn't the ultimate horsepower motor, but it ran pretty good for what it was.

09-17-2022, 01:09 PM	#23
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,137 Likes: 172 Liked 719 Times in 220 Posts	Re: Chevy 327 300 hp Not to squelch a good thread, but who was tuning the 409's back then? I had a very stock 409/425 horse that was balanced, OEM replacement cam,correct carbs F&R, 4:88 gears, a Muncie wide ratio 4 speed, fender well headers' one piece drive shaft,10 inch by 29.5" slicks, and it would go 12.70's very reliably, 12.66 on one occasion. I would leave about six grand and shift at 5300. RPMing the motor actually slowed the car down because the torque curve of that motor was pretty low RPM. We tried a Powerglide with a stocker converter and it picked up about half a second. It wasn't the ultimate horsepower motor, but it ran pretty good for what it was.