Re: Dyno'd my 440 and was disappointed - Questions question
[Re: Crizila]
#770027
08/15/10 04:03 AM
08/15/10 04:03 AM
|
Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
|
Supposedly the old MP formulas for figuring horsepower by (1) trap speed (MPH) (2) weight and (3) maybe a third one: were simple but were proven to be very accurate. As said I'd fix the dead hole and yes street dominator intakes are very low profile
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Dyno'd my 440 and was disappointed - Questions question
[Re: RapidRobert]
#770028
08/15/10 12:25 PM
08/15/10 12:25 PM
|
Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
|
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
|
Quote:
Supposedly the old MP formulas for figuring horsepower by (1) trap speed (MPH) (2) weight and (3) maybe a third one: were simple but were proven to be very accurate. As said I'd fix the dead hole and yes street dominator intakes are very low profile
yes fix the dead cylinder. My fuzzy math is this. You made 279hp on 7, so that's about 39.8571 each hole... so we will round up to 40 each. So add 40 to your 279 and you get 339 at the tires so that's probably close to 425 at the block. does that sound better to you?
|
|
|
Re: Dyno'd my 440 and was disappointed - Questions question
[Re: Mr.Yuck]
#770029
08/15/10 12:46 PM
08/15/10 12:46 PM
|
Joined: Apr 2009
Posts: 54 Houston, TX
Crunchy_Frog
member
|
member
Joined: Apr 2009
Posts: 54
Houston, TX
|
Quote:
yes fix the dead cylinder. My fuzzy math is this. You made 279hp on 7, so that's about 39.8571 each hole... so we will round up to 40 each. So add 40 to your 279 and you get 339 at the tires so that's probably close to 425 at the block. does that sound better to you?
40 + 279 is 339?? Must work for the gub'mnt... Some kind of voodoo economics?
|
|
|
Re: Dyno'd my 440 and was disappointed - Questions question
[Re: mark7171]
#770032
08/16/10 07:57 AM
08/16/10 07:57 AM
|
Joined: Jan 2005
Posts: 4,862 the frozen wastes...
Pale_Roader
Swears too much
|
Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
|
Surprised that no one here mentioned this, or maybe they did and i missed it... but keep in mind your 280HP (which we've now guesstimated to be over 300HP with all 8 firing) cannot be compared to the 500HP number you see posted so often here. RWHP vs crank HP. That 500HP 440 build will not be anywhere near that on the same chassis dyno you just used. A 500RWHP Mopar would be one mean-ass big block.
I would have suggested possibly modifying a Street Dominator intake (trimming the pad) and possibly even modifying the air cleaner if possible, but i doubt that would work for one reason, in MY experience, that intake barely even works without a spacer on top. Mine is 1" and i'm willing to bet it wants more. Maybe my combo is goofy, but that spacer is mandatory. So obviously that wouldn't work at all for you.
Someone here said that the Performer (or similar) intake is no improvement, i disagree. The weight is the improvement. Mopars are too heavy, a bunch off the front end is always a good thing.
Also, whoever told you to get 906's shouldn't be telling anyone what to do. Its pretty much the same head you have, just more expensive to buy used. If you're going to rebuild the engine (read: buy new MODERN pistons) then maybe get some ported 915's or aftermarket aluminum, if not, either port yours or leave it alone.
I personally like the Holley DP design more than the Edelbrock/Carter carb, but i've used both and the latter is fine. That engine probably wants a bigger carb though. Mine wanted more than an open, stub-stacked 750 Holley, and it was considerably less modified than yours. Mine also liked 94 octane. It was a low-compression 440 too, go figure. These engines are not efficient in design...
I'm with Sheldon though, sounds like with a really good tune, recurved distributor and just some good attention to detail in the powertrain from front to back this thing will keep you happy. Though i'd recommend a mandrel bent, aftermarket 3" exhaust system... that'll put a big stupid grin on your face that wont leave for a week...
Heh... and for all the posters suggesting you take it to the track, you might wanna remind them that in this idiot province (i live here too), Nanaimo might as well be 500 miles from Mission Raceways, with those insane ferry prices. It might be a bit cheaper to the Sunshine Coast, but then thats only an 1/8th mile track...
|
|
|
Re: Dyno'd my 440 and was disappointed - Questions question
[Re: Crunchy_Frog]
#770033
08/16/10 08:15 AM
08/16/10 08:15 AM
|
Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
|
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
|
Quote:
Quote:
yes fix the dead cylinder. My fuzzy math is this. You made 279hp on 7, so that's about 39.8571 each hole... so we will round up to 40 each. So add 40 to your 279 and you get 339 at the tires so that's probably close to 425 at the block. does that sound better to you?
40 + 279 is 339?? Must work for the gub'mnt... Some kind of voodoo economics?
WHOOPS MUST NOT OF HAD ENOUGH COFFEE...HAHA Ok 319 still close to 400 at the crank. TFF I DO work for uncle Sam...nothing to do with numbers through.
|
|
|
|
|