DynoTime for the 461 ..
Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,298
Likes: 1
From: Sodertalje/Sweden
DynoTime for the 461 ..
Going to Dyno my newly built 461 tomorrow and thought i`d start a little guessing game on the output on the engine.
The engine i built with this:
.030 bored 454 block
Ported 781 Ovals with 2.19/1.88 valves.
11:1 TRW slugs.
Fully balanced.
Comp Mech roller 288 AR (11-692-8).
Edelbrock RPM intake.
Holley 950 HP Carb.
Will probably spinn it to 6200.
So,what will the numbers be?
:cheers: :cheers:
The engine i built with this:
.030 bored 454 block
Ported 781 Ovals with 2.19/1.88 valves.
11:1 TRW slugs.
Fully balanced.
Comp Mech roller 288 AR (11-692-8).
Edelbrock RPM intake.
Holley 950 HP Carb.
Will probably spinn it to 6200.
So,what will the numbers be?
:cheers: :cheers:
Melting Slicks
Joined: Jul 2003
Posts: 2,194
Likes: 0
From: Tempe AZ
Re: DynoTime for the 461 .. (BB wowbagger)
I'm curious to see what it produces. My mechanic has two big blocks. One is going in his '80, the other is a 461 he had in a truck. He wants to sell it to me for my '79. He said it makes like 600+ hp, so 650hp is my guess.
Team Owner
Joined: Feb 1999
Posts: 34,455
Likes: 665
From: Republic of Texas
Re: DynoTime for the 461 .. (BB wowbagger)
On the motor dyno or at the rear wheels?
My guess is 550hp Flywheel Hp, hope I'm wrong though we have somewhat similar setups. :D
What are the specs on the 288 cam?
Should be impressive numbers without a doubt. :thumbs:
My guess is 550hp Flywheel Hp, hope I'm wrong though we have somewhat similar setups. :D
What are the specs on the 288 cam?
Should be impressive numbers without a doubt. :thumbs:
Instructor
Joined: Feb 2001
Posts: 217
Likes: 1
From: Suwanee GA
Re: DynoTime for the 461 .. (BB wowbagger)
Very interested in your results too. 427Hotrod has raved about that cam. I am thinking of using it for a 460 build-up. I would guess 540 hp, 575 ftlbs torque. The heads might be the limiting factor-depending on your port work, of course.
Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,298
Likes: 1
From: Sodertalje/Sweden
Re: DynoTime for the 461 .. (ZL1powr)
And the numbers are in.. :cheers: :cheers:
610Hp @ 5471 Rpm
634.8Ft/lbs @ 4578 Rpm
This was my first Dynorun,and the noise was incredible. :cheers:
610Hp @ 5471 Rpm
634.8Ft/lbs @ 4578 Rpm
This was my first Dynorun,and the noise was incredible. :cheers:
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Team Owner
Joined: Feb 1999
Posts: 34,455
Likes: 665
From: Republic of Texas
Re: DynoTime for the 461 .. (BB wowbagger)
Sweet numbers :thumbs: What are the specs on the 288 cam?
Also what the % of parasitic loss once you bolt the accessoies (water pump, alternator, PS pump, A/C?) vs what just the engine made?
Congrats :cheers:
Also what the % of parasitic loss once you bolt the accessoies (water pump, alternator, PS pump, A/C?) vs what just the engine made?
Congrats :cheers:
Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,298
Likes: 1
From: Sodertalje/Sweden
Re: DynoTime for the 461 .. (Corey 68)
Sweet numbers :thumbs: What are the specs on the 288 cam?
Also what the % of parasitic loss once you bolt the accessoies (water pump, alternator, PS pump, A/C?) vs what just the engine made?
Congrats :cheers:
Also what the % of parasitic loss once you bolt the accessoies (water pump, alternator, PS pump, A/C?) vs what just the engine made?
Congrats :cheers:
About the parasitic loss,i have no idea.. :smash: :cheers:
Safety Car
Joined: Jul 2002
Posts: 3,770
Likes: 3
From: St Louis MO
Re: DynoTime for the 461 .. (BB wowbagger)
Those numbers peaked real low. I bet that's gonna be a blast to drive on the street. One question: Since it peaked so low, do you think you could have the same performance from a hydraulic roller? Or even a hyd flat tappet?
Brett
Brett
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Re: DynoTime for the 461 .. (Brettmc)
Those numbers peaked real low. I bet that's gonna be a blast to drive on the street. One question: Since it peaked so low, do you think you could have the same performance from a hydraulic roller? Or even a hyd flat tappet?
Brett
Brett
I thought the same thing, peaking at under 6000 rpm's there is not much chance of lifter float if using a hyd roller.
Burning Brakes
Joined: Feb 2004
Posts: 958
Likes: 0
From: shawnee ks
Re: DynoTime for the 461 .. (BB wowbagger)
Your oval heads will give it great torque but kill hp above 5500 rpm.switching to rectangle heads will bump up the power band and higher hp . even torque will be increased with that rpm manifold.nonetheless it should be a blast to spin tires off the car.
Racer
Joined: May 2002
Posts: 352
Likes: 0
From: GA
Re: DynoTime for the 461 .. (BB wowbagger)
BB wowbagger, Your muncie should be fine as long as It's In good shape. I ran my muncie behind a 450 rwhp BB and 500+rwhp on nitrous. Unless your pulling the tires when you launch at the track,your muncie should hold up. Your clutch Is going to hate you. :)