average power for a 410
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average power for a 410
i was just wondering what the average hp and tq numbers were for a 410 bored 40 over with a set of ebock heads out of the box, with about 10:1 comp. thanks for any replies.
Last edited by strokerfe; Dec 10, 2006 at 04:04 PM.
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thanks bear 45/70, i have a 76 390 that i converted to a 418 that has the ebock heads, rpm intake and a custom grind cam, 517/513 int/exh ivo -0.3, ivc 35.7, evo 44.6, evc -0.3, and a 110deg. cent line.and was wondering what kind of power it might be putting out.
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From: Iowa
Originally Posted by strokerfe
thanks bear 45/70, i have a 76 390 that i converted to a 418 that has the ebock heads, rpm intake and a custom grind cam, 517/513 int/exh ivo -0.3, ivc 35.7, evo 44.6, evc -0.3, and a 110deg. cent line.and was wondering what kind of power it might be putting out.
Headers?
Mufflers?
Are those the specs at .050" lift?
What type of lifters? (hydraulic, mechanical, or roller?)
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Quote:
How much compression?
Headers?
Mufflers?
Are those the specs at .050" lift?
What type of lifters? (hydraulic, mechanical, or roller?)
__________________
>i am running 10to1 comp.
>800cfm ebok carb unfortunatly
> rpm intake and heads
>the cam specs are at .050" and it is hyd.
>hooker comp. headers 1 3/4" primaries with 2 1/2" collectors cut back to 3" with dual 3" pipe, H pipe, and dual 3"flowmaster 40 series turned in front of each tire.
>2500 stall trq conv. with a rebuilt c-6 and a shift kit running into a 3.89 open diff. rear. soon to be a soft locker
>it also has a msd 6al, stock dizzy custom curved and timed at 36deg full.
thanks for any replies in advance.
How much compression?
Headers?
Mufflers?
Are those the specs at .050" lift?
What type of lifters? (hydraulic, mechanical, or roller?)
__________________
>i am running 10to1 comp.
>800cfm ebok carb unfortunatly
> rpm intake and heads
>the cam specs are at .050" and it is hyd.
>hooker comp. headers 1 3/4" primaries with 2 1/2" collectors cut back to 3" with dual 3" pipe, H pipe, and dual 3"flowmaster 40 series turned in front of each tire.
>2500 stall trq conv. with a rebuilt c-6 and a shift kit running into a 3.89 open diff. rear. soon to be a soft locker
>it also has a msd 6al, stock dizzy custom curved and timed at 36deg full.
thanks for any replies in advance.
Post Fiend
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From: Iowa
Desktop Dyno 2000 says:
417hp @ 5500rpm
470ft-lbs @ 4000rpm
441ft-lbs @ 2000rpm (so you can get an idea of what the curve looks like)
417hp @ 5500rpm
470ft-lbs @ 4000rpm
441ft-lbs @ 2000rpm (so you can get an idea of what the curve looks like)
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Post Fiend
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From: Union, Washington
Originally Posted by rusty70f100
Desktop Dyno 2000 says:
417hp @ 5500rpm
470ft-lbs @ 4000rpm
441ft-lbs @ 2000rpm (so you can get an idea of what the curve looks like)
417hp @ 5500rpm
470ft-lbs @ 4000rpm
441ft-lbs @ 2000rpm (so you can get an idea of what the curve looks like)
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thanks for the numbers rusty70f100. what kind of a +/- factor would you give for the dd.
and how much of that power do you think actually gets to the ground. i was just wondering because after my build i took it to a chassy dino and it seemed a little down on power. according to my print out of the dyno it is only putting about 144ft/lbs at 2000rpm and about 57hp, and max is 309ft/lbs at 4100 rpm and 278hp at 4800rpm's.
is it just me or do i just have high expectations of this build.
edit: the chassy dino was a mustang dynomometer if it matters or not. i heard they were a little tougher to put down good #'s on.
and how much of that power do you think actually gets to the ground. i was just wondering because after my build i took it to a chassy dino and it seemed a little down on power. according to my print out of the dyno it is only putting about 144ft/lbs at 2000rpm and about 57hp, and max is 309ft/lbs at 4100 rpm and 278hp at 4800rpm's.
is it just me or do i just have high expectations of this build.
edit: the chassy dino was a mustang dynomometer if it matters or not. i heard they were a little tougher to put down good #'s on.
Last edited by strokerfe; Dec 10, 2006 at 07:56 PM.
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From: Iowa
Well first, DD2k shows results at the flywheel. Second, the program assumes the correct timing curve, with enough octane to avoid detonation. It also assumes perfect fuel distribution.
If you were running too rich or lean, and the timing curve was not optimal for the engine, your results on a dyno will reflect this.
On DD2k's accuracy, I'd give it + or - 10%.
If you were running too rich or lean, and the timing curve was not optimal for the engine, your results on a dyno will reflect this.
On DD2k's accuracy, I'd give it + or - 10%.
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I was thinking about trading in the edelbrock 800 for a holley 770 and was wondering if that might give me a few more ponies and maybe give a little better throttle resp. Or maybe something a little smaller. i was thinking that this 800 was a little to much for this engine because it seems to hesitate a bit when you roll on the throttle a little. Do you think that would be from to much carb or maybe another problem.
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I think you've definately got some tuning to do! As for where to begin...
I wouldn't start swapping out carburetors. Most likely there's nothing wrong with the one that's on it. It just needs to be tuned to the motor. I'd look at the accelerator pump.
I'd get an air/fuel gauge (wide band O2 sensor) and go from there. Get the timing curve to where the motor likes it. Get everything right and you should notice a world of difference!
I wouldn't start swapping out carburetors. Most likely there's nothing wrong with the one that's on it. It just needs to be tuned to the motor. I'd look at the accelerator pump.
I'd get an air/fuel gauge (wide band O2 sensor) and go from there. Get the timing curve to where the motor likes it. Get everything right and you should notice a world of difference!
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I think the timing is about as close as we can get it, when we had it on the dyno we ran through several pulls with different timing and it was set to get the best hp without falling off, thats how we came up with the 36* total timing and i believe somewhere around 10 or 12* initial, i could be wrong though . But as far as the Edelbrock goes i'm not to savy on the webber carbs so it is pretty much just out of the box, which is the reason i was considering the holley.
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Did you try different springs? Different amounts of mechanical advance? There's a lot more to it than just setting base timing and figuring up the total.
If you know how to tune a Holley, then by all means get one! Either that, or get a book and figure out the Edelbrock.
It's all in the tuning. You can have the best motor in the world and it aint worth **** unless it's tuned right.
If you know how to tune a Holley, then by all means get one! Either that, or get a book and figure out the Edelbrock.
It's all in the tuning. You can have the best motor in the world and it aint worth **** unless it's tuned right.
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