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Old 01-19-2014, 07:39 PM
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unearthing the caddy 500 facts?

Hey.
Looking at a 75 caddy 500 n tranny. I know these are rated at like 195 horses but there's no way!
I rode in a mid 70s cad and other than the scrappy gearing slowing it down outstanding the hole it kicked in and was flat moving!
What's the scoop on em? HG
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Old 01-19-2014, 08:14 PM
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Quote:
Originally Posted by HemmiGremmie View Post
Hey.
Looking at a 75 caddy 500 n tranny. I know these are rated at like 195 horses but there's no way!
I rode in a mid 70s cad and other than the scrappy gearing slowing it down outstanding the hole it kicked in and was flat moving!
What's the scoop on em? HG
Up through 1971, motors were rated for hp and torque without having to operate anything on the outside of the motor, like fan, power steering pump, etc. After 1971, they were rated with all the accessories that they would have to operate in the real world. These accessories bleed power from the motor, so the observed dyno runs showed the motor making less power.
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Old 01-19-2014, 08:53 PM
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As Tech says.......also in '71 they dropped the compression from 10.1 down to 8.5:1, I took this pic out of the "Maximum Torque Specialties" engine tech guide book.
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Old 01-20-2014, 06:08 AM
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Accurate published horsepower figures for late 60's and early 70's performance cars is hard to determine. The combination of rising insurance rates and the change in how they measured horsepower (with/without accessories) makes it hard to compare data from year to year.

For performance cars in the late 60's they also lowered published performance data just to try to keep insurance cost down. For example, Ford rated the Super Cobrajet 428 at 335 horsepower, which was the same as the horsepower for the performance 390 in 67-68. Actual street horsepower for the 428 was probably over 400, and when set up for racing (higher rpm, bigger carb, etc.) it could get even more horsepower without breaking anything.

Bruce
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Old 02-14-2014, 12:07 AM
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Originally Posted by HemmiGremmie View Post
I rode in a mid 70s cad and other than the scrappy gearing slowing it down outstanding the hole it kicked in and was flat moving!
I had a 500 Caddy in my Camaro, and it had bottom end torque that would smoke the tires for as long as you wanted to hold it to the floor
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Old 02-14-2014, 05:49 AM
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sawmill power

I have a 472 Caddy running the 48 in blade on my sawmill, Lots of low end torque where I need it. But it did get a real workout cutting some BIG western Juniper trees for a friend.
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