Guess the hp & tourqe

[DAREDEVIL]

ENGINE SPECS :

10.200 dart block
4.500 stroke
4.580 bore
Je flat top
6.700 rod ( 1.48 ratio )
275/280 -114 @ 420 cam ( solid roller )
351 BRODIX CNC oval port
Isky indurance springs
Manley Valves
Jesel valvetrain
CNC matched intake Brodix ( 1 inch 4 hole spacer )
Holley 1050 ( as of now, 94 jets in the front and 96 in the back )
MSD
NGK 6's
gear drive timing set ( billet )
9.7 : 1 compression
93 octane pump fuel
@ max 6200 RPM
Wet SUMP,using Valvoline R1

[2112]

872hp @ 6450 (your'e gonna have rev it a bit more )

770 lbs @ 5300

.

[DAREDEVIL]

872hp @ 6450 (your'e gonna have rev it a bit more )

770 lbs @ 5300

.

WOW,,,,i thought the tourqe # would be more then HP ,,,,,but still . Thats cool.

[Geronimo36]

I'm more conservative so I say 750-775 hp, 725 tq is my guess!

[jeffswav]

ENGINE SPECS :

10.200 dart block
4.500 stroke
4.580 bore
Je flat top
6.700 rod ( 1.48 ratio )
275/280 -114 @ 420 cam ( solid roller )
351 BRODIX CNC oval port
Isky indurance springs
Manley Valves
Jesel valvetrain
CNC matched intake Brodix
Holley 1050
MSD
NGK 6's
9.7 : 1 compression
93 octane pump fuel
@ max 6200 RPM
Wet SUMP,using Valvoline R1

Dude, you have to call Bob RMbuilder for your cam. Your going to have to run high RPM to build your power. What CI does that come out to? I am not familiar with your heads, you say oval port? You should trade Bajabob for his big Rec heads. I hope you have a well built outdrive for that kind of power. Good luck with your new build!!

[jeffswav]

I took a look at your link. Looks like you are a event planner. Is this engine for a Raceboat or just for fun and advertisement?

[MikeyFIN]

I'm more conservative so I say 750-775 hp, 725 tq is my guess!

725hp@6200 hp 670tq @ 4700...

As of the cam is it advertised degrees or .050" numbers ?
If .050" I wanna be at the dyno to see that sucker blow up at the Rpm´s the Cam is starting to work..

I mean with a 4.5 CRANK AND 1.48 ROD RATIO (which sucks bigtime with the heavy reciprocating mass) I´D GO WAY DOWN with the piston speed when racing a whole season...

[DAREDEVIL]

I took a look at your link. Looks like you are a event planner. Is this engine for a Raceboat or just for fun and advertisement?

Its for a raceboat, but a ovalport head makes more tourqe then a rectangular one !!!!!!
I am trying to stay around 6000-6200 RPM which is VERY safe for the 1.48 ratio.
But it could be that i need a diffrent cam,,,not saying this one is perfect .
Thats why i posted this,,,,,INPUT.

[DAREDEVIL]

Dude, you have to call Bob RMbuilder for your cam. Your going to have to run high RPM to build your power. What CI does that come out to? I am not familiar with your heads, you say oval port? You should trade Bajabob for his big Rec heads. I hope you have a well built outdrive for that kind of power. Good luck with your new build!!

CI 595'ish.

[Ratickle]

725hp@6200 hp 670tq @ 4700...

Ok,,,

HAVE A NICE HOLIDAY !

Both of you guys have things to bring to the table in a boating discussion without being azzes. I used to enjoy the ribbing you guys gave, and took. Got to meet both of you in Key West. Got to see DD's boat run. So now I'm hoping I get to see some decent conversations and experienced input, not the petty crap. People are different, that's how we learn.

Think about it, okay?

And both of you have a happy Thanksgiving, even though I know it is not celebrated in Finland.

At that high of RPM I don't think you have enough cam to peak there and it'll fall a little lower for your peak horsepower. Probably in the 5900 to 6000 range. So, I'm going with 815 HP peak at 6000 and your torque is gonna peak clear down around 4000 at around 775.....

[DAREDEVIL]

At that high of RPM I don't think you have enough cam to peak there and it'll fall a little lower for your peak horsepower. Probably in the 5900 to 6000 range. So, I'm going with 815 HP peak at 6000 and your torque is gonna peak clear down around 4000 at around 775.....

Well, that # is actually not bad !!!!!

Its ~200 pounds more torque and ~100 more HP then what i had in there.

Maybe with a better cam ,,i could get more torque ?!

[mdgperf]

What exhaust system,a set of big tubes(2.25 inner pipe) makes a huge difference in hp on a big na motor,with big tubes and the right cam 850hp and 800tq .

[DAREDEVIL]

Stainless Marine HT III with 4.5 ID dry pipes !!!!!

[imco offshore]

scott, some of that doesn,t match ? some are too big some are to small and the cam looks late,,,do some more research ,, please.. i know you are going to drop some big coin,that just don,t look dependable,,,you don,t need 800 hp to run p-4,, back up some and get some more depedablity,, just my 2 cents,, good luck.

[DAREDEVIL]

scott, some of that doesn,t match ? some are too big some are to small and the cam looks late,,,do some more research ,, please.. i know you are going to drop some big coin,that just don,t look dependable,,,you don,t need 800 hp to run p-4,, back up some and get some more depedablity,, just my 2 cents,, good luck.

Thanks for your input,,,,,but 32 feet straight bottom and Tranny with a speedmaster are aking for Torgue,,,,that only comes with HP !!!!!

Did reasearch ,,and still do . Thats the reason for this thread. THANKS

by the way,,,going out tomorow !!!!!!!!

[imco offshore]

being that you loose about 20 %(i,m guessing) running thru a trans ,, wouldn,t it be smart money to go crash box,?

[DAREDEVIL]

being that you loose about 20 %(i,m guessing) running thru a trans ,, wouldn,t it be smart money to go crash box,?

With a single engine ......NO
Also u really don't gain that much,,,tried it !!!!!!!
Its more like 20 HP not 20 % !!!

Also ,,,what did u mean by # high and some low ???

I have everything ecsept the pistons , I can change the cam .......but that will be shown on the dyno !!!

Or thru input of cam gurus here !!!

[imco offshore]

i would like to see a 4.250 stroke and maybe a 6.500 rod and a differant cam ,,just a differant take on it! ask the 6 or 7 engine builders on here their opinion, see what they say,,they might even have some stuff,for ya. cheep .don,t hurt to ask

[DAREDEVIL]

i would like to see a 4.250 stroke and maybe a 6.500 rod and a differant cam ,,just a differant take on it! ask the 6 or 7 engine builders on here their opinion, see what they say,,they might even have some stuff,for ya. cheep .don,t hurt to ask

I had 726 HP now,,,so with a 540 or 550 N/A not more on 93 octane .
Thats why 4.5 stroke.
Remember all the parts i have ,,crank ,rods are billet ,,SO NO WORRYS THERE compared to the 4 enginebuilders i talked to already !!!!

[DAREDEVIL]

598 Ci motor with same crank and rods, only mild cam and hydraulic roller and smaller cc heads with 850 holley made on dyno.
@ 5500 rpm 745 HP and 690 torque !!!!

Still running since a couple years trouble free !!!!!!

An other made over 800HP and close to 800 torque ( similar specs , but ford )

George???????????? what should be wrong ????? WHY ???????
Are u scared i could actually win a race ??? LOL