How much HP is this making?

[tall1]

I've about got my motor back together and was curious how much power its going to make (out of curiosity). Here's the rundown of what I have.
62t/61x cyl. and cases ported by ProTec
82mm bore
ProTec Cast Head
5mm stroker crank
dual 44's no chokes w/Riva Fa's
Riva Pipe Not sure which one but the manifold is red and waterbox
Stock ignition with lightened flywheel

Thanks guys, this motor came in a WB1 that I bought last year for $500. Needless to say I was a little suprised when I tore it down. You could tell it had been together for a while. And now i'm just about ready to put it back in. I can't wait to get it on the water, this thing has to be a terror.

 

[SuperJETT]

Unless you get it on an accurate dyno, no telling, plus depends on the fuel used, state of tune, altitude/temperature/humidity, etc etc.

Just say a healthy amount.

 

[ger87410]

Atleast 63. :biggthumpup:

 

[CP Watercraft]

for a 771cc and with that setup you got..hp 120

 

[Matt_E]

Sure, pick a number.

 

[tall1]

Thanks, I wasn't looking for anything accurate. I know there's to many variables. Just a ballpark #. I was hoping for around 130ish.

 

[Matt_E]

I was hoping for around 130ish.

Why?

 

[tall1]

Why?

I guess just because my Seadoo makes about that and its alot bigger and heavier than a Baster. So if the B1 had about the same power it would be awesome. Just anticipating what it's gonna run like thats all.

 

[Matt_E]

Don't worry about abstract numbers. It should run pretty nicely. That's what counts.

 

[suva]

Why?

For all the people that ask 'how fast does it go' and 'how much power does it make'.

I usually make up numbers, depending on who's asking. People seem to like 70mph, no less, and no more than 74 or they won't believe you, or they'll say something to the effect of their buddy's seadoo goes x miles an hour faster. Anything over 100hp seems to please most inquiring ears.

 

[tall1]

For all the people that ask 'how fast does it go' and 'how much power does it make'.

I usually make up numbers, depending on who's asking. People seem to like 70mph, no less, and no more than 74 or they won't believe you, or they'll say something to the effect of their buddy's seadoo goes x miles an hour faster. Anything over 100hp seems to please most inquiring ears.

Exactly, a shoulder shrug dosen't usually fly.

 

[steveyz250fpilot]

Gil told me 73 hp

 

[egbrig]

Most people would be reallllllllly disapointed if they saw their engine on a dyno because of people making up numbers to try to impress. Who cares? If it works good, then thats all that matters.

 

[GIL]

Gil told me 73 hp

DID NOT! I asked how much it weighs!!!

 

[steveyz250fpilot]

DID NOT! I asked how much it weighs!!!

Oh yeah...that was it.

So what's the answer? How much does it weigh?

 

[RoyalFlush@PCB]

At LEAST 335lbs, more if waterlogged. :wink:

 

[Waternut]

My hp rating range from the following: Absolute dog, I've lost my mojo, respectable, pulls good/has good power, and arm ripper.

 

[WRX Dave]

Most people would be reallllllllly disapointed if they saw their engine on a dyno because of people making up numbers to try to impress. Who cares? If it works good, then thats all that matters.

Want to have some fun? Go to a car show that has a chassis dyno. I swear I've seen ricers nearly in tears when they see how weak their cars actually are. One guy even had a "300WHP" sticker on his back windshield. He put down 180.

 

[yamaslut]

as a complete novice w/ motor building as a science... I would guess that 100hp-120hp would not be that far off.... If you think the GP8 motor puts out 120hp stock so that should not be that hard for a stroked 720cc to pull off those numbers...???