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View Full Version : Guess the hp & tourqe



DAREDEVIL
11-26-2009, 01:33 AM
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
11-26-2009, 02:15 AM
872hp @ 6450 (your'e gonna have rev it a bit more :USA:)

770 lbs @ 5300

.

DAREDEVIL
11-26-2009, 02:29 AM
872hp @ 6450 (your'e gonna have rev it a bit more :USA:)

770 lbs @ 5300

.

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

Geronimo36
11-26-2009, 08:07 AM
I'm more conservative so I say 750-775 hp, 725 tq is my guess!

jeffswav
11-26-2009, 10:00 AM
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 R1Dude, 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
11-26-2009, 10:09 AM
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
11-26-2009, 10:25 AM
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 Rpmīs 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) IīD GO WAY DOWN with the piston speed when racing a whole season...

DAREDEVIL
11-26-2009, 10:40 AM
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
11-26-2009, 10:41 AM
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
11-26-2009, 10:57 AM
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
11-26-2009, 11:06 AM
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
11-26-2009, 12:12 PM
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
11-26-2009, 12:25 PM
Stainless Marine HT III with 4.5 ID dry pipes !!!!!

imco offshore
11-26-2009, 01:08 PM
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
11-26-2009, 01:13 PM
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 !!!!!!!!:cheers2:

imco offshore
11-26-2009, 01:26 PM
being that you loose about 20 %(i,m guessing) running thru a trans ,, wouldn,t it be smart money to go crash box,?

DAREDEVIL
11-26-2009, 01:31 PM
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
11-26-2009, 01:38 PM
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
11-26-2009, 01:47 PM
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
11-26-2009, 02:37 PM
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

MarylandMark
11-26-2009, 03:51 PM
Are u scared i could actually finish a race ??? LOL

:eek:

Them just jokes- your out there and give it as well as you take it so it's all good! :cheers2:

DAREDEVIL
11-28-2009, 12:28 PM
Even i have the best in the industrie working on this project,,,i would still like to keep this thread up for MORE input !!!!!

Keep posting,,,it will help all of us to hear your thoughts on this !!!!!!

PatriYacht
11-29-2009, 10:37 AM
This engine should be fine with the parts listed. Rod ratio will be about the same as a low deck 540 which is one of the more common builds out there. Can't tell what cam that is but if this engine is cammed to peak at 6000-6200 it should have no trouble making 800hp. You might want to take a couple of cams to try on the dyno. The valvetrain is the weak point in any BBC. Use shaft rockers and good lifters.

stainless
11-29-2009, 11:47 AM
788 hp 775 torque

AIR TIME
11-29-2009, 04:57 PM
Are there guys running blowers in p4 in the big heavy twins or could you or would that be a p3 bump up. did you see DEAN at kw,his boats won two worlds this year, I know he builds a nice 800hp motor solid roller motors 540 ish , did you talk to bob m about a cam? :seeya:

DAREDEVIL
11-29-2009, 05:30 PM
Are there guys running blowers in p4 in the big heavy twins or could you or would that be a p3 bump up. did you see DEAN at kw,his boats won two worlds this year, I know he builds a nice 800hp motor solid roller motors 540 ish , did you talk to bob m about a cam? :seeya:

NO,YES,NO,YES,NO,YES and :seeya: LOL

AIR TIME
11-29-2009, 09:45 PM
NO,YES,NO,YES,NO,YES and :seeya: LOL

you missed one so did you see Dean and two of the boats that run his power did win thats p1 and p5, I was typing as I watched colts come back for a win after a 40yd penalty:rolleyes: for pi bullchit call non reviewable:rolleyes: just like with the pats we had the 1st and the refs were even worse , the mannings a couple of whiners godI hate them and there commercials:cuss::willy_nilly::bump::smash::boxing_smiley:

DAREDEVIL
11-29-2009, 09:48 PM
you missed one so did you see Dean and two of the boats that run his power did win thats p1 and p5, I was typing as I watched colts come back for a win after a 40yd penalty:rolleyes: for pi bullchit call non reviewable:rolleyes: just like with the pats we had the 1st and the refs were even worse , the mannings a couple of whiners godI hate them and there commercials:cuss::willy_nilly::bump::smash::boxing_smiley:

The only thing i did not see was Dean. But i spoke to him on the phone after KW.:USA:

Raylar
12-04-2009, 01:50 AM
My intelligent WAGMAR (Wild ASS Guess Made AT Random!)

763HP at 6100 rpms
750 Ft/lbs of torque at 4900 rpms

Should be a flat torque curve monster! Good for Goi'n around the Pins!

Best Regards,
Ray @ Raylar

WETTE VETTE
12-04-2009, 05:44 PM
I'm guessing 800 / 760. Have you run NGK -6's in similar race motors? Seem like they may be on the hot side to me. Here's a picture of my 10.9:1 600" BBC while we're on the subject. Pushes my 23' cat right along!:driving:

I run NGK -9's.

Craig

DAREDEVIL
12-04-2009, 06:04 PM
I'm guessing 800 / 760. Have you run NGK -6's in similar race motors? Seem like they may be on the hot side to me. Here's a picture of my 10.9:1 600" BBC while we're on the subject. Pushes my 23' cat right along!:driving:

I run NGK -9's.

Craig

I run 7-8's right now ,with the 12:1 racefuel on a 509 CI .

I keep fouling them up in the milling area,,so i thought a little hoter isn't bad.
Specialy on the 9.7:1 on 93 octane !
U run racefuel mix in yours , right ?
If u tell me u run 93 in a 10.9:1 u will burn it up anyways soon ,,no matter what plugs u run !

WETTE VETTE
12-04-2009, 06:51 PM
I have 2 tanks in the boat so I run 92 for cruising and when its go time I flip a switch on the dash and run the other tank that has 100 octane unleaded. I keep the A/F's around 12.6 and have never had fouling issues with the -9's.

DAREDEVIL
12-04-2009, 07:47 PM
Like i said ,,i also have a 100% locked distributer ,,on a 12:1 509 and the 9's fouled .......on racefuel 110 octane !!!

Maybe u got it going right with the 2 tanks then ?!

That is why i build this 93 octane engine ,,,less problems and same power or even more and at a better spot !!!!!

MERPerformance
12-04-2009, 08:07 PM
I run 7-8's right now ,with the 12:1 racefuel on a 509 CI .

I keep fouling them up in the milling area,,so i thought a little hoter isn't bad.
Specialy on the 9.7:1 on 93 octane !
U run racefuel mix in yours , right ?
If u tell me u run 93 in a 10.9:1 u will burn it up anyways soon ,,no matter what plugs u run !
Hate to say it, but if you have adjust your idle and off-idle fuel mixture by running a hotter plug, you need to get someone else to do your tuning.

imco offshore
12-04-2009, 08:16 PM
mark i said the same thing,,i think he even needs to look at the power valve?

DAREDEVIL
12-04-2009, 08:24 PM
WOHOOOOOO, lets back up ...PLEASE THAT WAS MY OLD MOTOR !!!!!!!!!!!!

I don't even whant to hear about that one !!!!!


MARK and BOB are helping me now with the new engine and what ever those 2 say is a go !!!!

Still would like hear some more guesses on the power ???

I wrote them all down to see who cam closest !!!!! LOL

MERPerformance
12-04-2009, 09:50 PM
mark i said the same thing,,i think he even needs to look at the power valve?
George, you are correct! I was just making a comment.

MERPerformance
12-04-2009, 09:54 PM
DAREDEVIL, You sent me a PM, I spent about 15 min. to reply and you don't accept PMs or E-mails. NICE! Call me tomorrow. I'll tell you what I wrote.

cigdaze
12-04-2009, 10:53 PM
DAREDEVIL, You sent me a PM, I spent about 15 min. to reply and you don't accept PMs or E-mails. NICE! Call me tomorrow. I'll tell you what I wrote.
That wasn't his doing; he did accept PM's up until approximately 8pm.
He's had a temporary status modification. Sorry for the inconvenience.

MERPerformance
12-05-2009, 09:04 PM
i'm guessing 800 / 760. Have you run ngk -6's in similar race motors? Seem like they may be on the hot side to me. Here's a picture of my 10.9:1 600" bbc while we're on the subject. Pushes my 23' cat right along!:driving:

I run ngk -9's.

Craig
now that's a sweet piece of work you have!

MarylandMark
12-05-2009, 09:54 PM
rut row

DAREDEVIL
Banned

JFM
12-06-2009, 10:58 AM
just saw that :eek:

WETTE VETTE
12-07-2009, 01:32 PM
now that's a sweet piece of work you have!

Thank you!:cheers2: