how much hp and torque

[chris83]

1968 455 f block punched .40 over making it a 462 i believe.The motor has 10.1 comp trw forged pistons,a comp cams extreme energy 284 duration advertised 286/296/at .50 inch lift 240/246 541/544 lift.Had a new std.crank and clevite bearings.Also had the big valve c heads rebuilt port and polished.The trans is a turbo 350 rebuilt with shift kit and a midwest 3000 to 3200 stall convertor.Thr rear end is a eaton posi 410 and the frame and control arms have been boxed so if any one knows a estimate of the hp and torque would help before she is all back together just in case i need to change something thanks.

[MN71W30]

Originally Posted by chris83

1968 455 f block punched .40 over making it a 462 i believe.The motor has 10.1 comp trw forged pistons,a comp cams extreme energy 284 duration advertised 286/296/at .50 inch lift 240/246 541/544 lift.Had a new std.crank and clevite bearings.Also had the big valve c heads rebuilt port and polished.The trans is a turbo 350 rebuilt with shift kit and a midwest 3000 to 3200 stall convertor.Thr rear end is a eaton posi 410 and the frame and control arms have been boxed so if any one knows a estimate of the hp and torque would help before she is all back together just in case i need to change something thanks.

It sounds like a great motor. I don't think I would change a thing. I have seen Olds 455's run really strong with less camshaft than you have. When a guy starts talking HP there is alot of room for speculation. A day at the dyno would tell you the real numbers. I saw a simiar Olds engine with head work like yours in a 70 Buick GS run high 11's 20 years ago. The head work may vary the numbers but I would say 450 to 500 HP and probably 500 or more on the torque. I am using the WAG method to determine the numbers. WAG=Wild ass guess.

[Warhead]

Depending on jetting, ignition curve, unknown porting, baseline 250 cfm heads, unknown exhaust system.....not yet moving, but flashing the converter...I'd say 4700 lbs/ft of torque, in 1st gear-at the tires.
Converter, trans, and axle eats 25% of what it makes, anyway.

Get some aftermarket axles for the 8.5 rear (it IS an 8.5, isn't it?) before you throw sticky tires on it.

ET is the ONLY # that matters, now.
HP is a # for the ego only. Don't worry about that.
JMO,
Jim

[BLUE72RAGTOP]

Maybe as much as 475-490 HP and above 500 lbs ft of torque with headers, depending on intake, carb, & ignition. You might wish for 1 sz smaller cam since this one will make peak power spinning a little higher than you could comfortably go with this crank. But with all that torque who cares. Should be sweet!

[captjim]

Originally Posted by Warhead

Depending on jetting, ignition curve, unknown porting, baseline 250 cfm heads, unknown exhaust system.....not yet moving, but flashing the converter...I'd say 4700 lbs/ft of torque, in 1st gear-at the tires.
Converter, trans, and axle eats 25% of what it makes, anyway.

Get some aftermarket axles for the 8.5 rear (it IS an 8.5, isn't it?) before you throw sticky tires on it.

ET is the ONLY # that matters, now.
HP is a # for the ego only. Don't worry about that.
JMO,
Jim

At 4700 ft.lbs, he will have a tough time sticking the tires!

I agree, ET is the only real number.

[chris83]

well i was planing on running a performer or cross wind intake i have a custom built holley 850 im running a full msd ignition with msd 6al box and blaster coil and running through a set of hooker headers with three inch pipes back to flowmaster 40s then three inch out the back car weighs about 3500 pounds

[chris83]

for warhead its a eaton posi unit with 410 gears strange axles and a set of lake wood traction bars

[Warhead]

for warhead its a eaton posi unit with 410 gears strange axles and a set of lake wood traction bars

4700 in first gear, and I'm stickin' to it.
Good luck, keep us posted, Chris.
Jim

[Brian F]

My only advice to you is to watch that oil pressure. As I have been told, Olds likes to push all the oil up in the heads and starve the bottom end when you run a low gear like you are. Just watch that oil pressure. I have restrictors in my motor as well as a crank scraper and I run 75-90 on the gauge all the time. Other than that HANG ON SON!

[J-(Chicago)]

Edelbrock Performer intakes run a little better than crosswinds.
The polished crosswind looks cooler, though it's 2 tenths slower in the 1/4 mile.

[chris83]

thanks j -chic was wondering that info so i will put the performer back on her then

[70Wcars]

Wow...bunch of cam!!! Should run well into the 11's with the right tires!! When you run, get an exact weight on your car then use the formula with your known miles per hour at the end of the 1/4 mile to calculate Horsepower.

When ya want to really go fast I'll build you a Q-jet!!

Danny