ARE YOU SMARTER THAN THE DESIGNERS WHO BUILT THE MOTOR?

superbender · **Posted:** April 13th, 2013, 9:14 pm

DoktorC wrote:

I always get a kick out of this type of idea...because Yes..the dude designing the motor obviously has his shit together...but...then they run into the bean counters, the kid in Peterborough that failed high school and now slaps 3 cylinders together at OMC, and the EPA. So, while I doubt I'm smarter than the actual designer of my motor (or even the robot that put mine together...thank you Yamaha) I don't have to operate within the constraints that he had to. My motor doesn't have to live for 2000 hours on the back of an east coast lobster boat running on a mixture of sea water, 82 octane and skreech...

Everything I own is MUCH faster than stock......

x3

BoomerMuskoka · **Posted:** April 13th, 2013, 9:34 pm

DoktorC wrote:

That its awesome (mine might break the dyno)
!!

likes this comment :!:

Hounddog · **Joined:** April 3rd, 2012, 1:52 pm **Posts:** 3167

I don't have any experience with V6 motors, so I can't offer an opinion motor wise, But, I have a lot of experience with the smaller motors and dealing with engine builders and dyno testing. DOC's comment is dead on. WE DON"T RACE DYNOS!
Many times the dyno sheet is too justify the bill for the engine work. What you saw on the dyno doesn't necessarily transfer to the water. I now use dyno tests different than I did in the past. I dyno a powerhead that I am happy with on the race course and one that I have proven race results. In every case the powerhead results show that the motor is not at the high end of the horsepower range. Some are 5 to 6 hp less. But, what the chart shows is a wide, flat power curve over a 2000 to 2500 rpm range where the torque and horsepower is very consistant.

Hydroid · **Joined:** April 5th, 2012, 6:58 pm **Posts:** 717

DoktorC wrote:

That its awesome (mine might break the dyno)
A T motor would be more concerned with power under the curve than actual peak power...
A dyno is only as good as its operator...and in reality should only be used to show improvements over a baseline. Dyno the motor stock, make changes, rerun the test to see improvement....the actual number is useless in the real world (we don't race dynos)
Good question...I gained 2-3mph by going to a CES spec motor with a cut stock head (over a stock motor with the same cut head)...and since my motor was 70hp stock...and a CES is 70hp...I guess my answer would have to be zero hp = 2-3mph....just think how many mph I would get if I added even 1 addition hp...infinity!!

Hey, Good Will Hunting, CNN just reported Stephen Hawking jumped up & screamed BULLSHIT! with his natural voice, dropped dead.

DoktorC · **Posted:** April 14th, 2013, 9:15 am

Hydroid wrote:

DoktorC wrote:

That its awesome (mine might break the dyno)
A T motor would be more concerned with power under the curve than actual peak power...
A dyno is only as good as its operator...and in reality should only be used to show improvements over a baseline. Dyno the motor stock, make changes, rerun the test to see improvement....the actual number is useless in the real world (we don't race dynos)
Good question...I gained 2-3mph by going to a CES spec motor with a cut stock head (over a stock motor with the same cut head)...and since my motor was 70hp stock...and a CES is 70hp...I guess my answer would have to be zero hp = 2-3mph....just think how many mph I would get if I added even 1 addition hp...infinity!!

Hey, Good Will Hunting, CNN just reported Stephen Hawking jumped up & screamed BULLSHIT! with his natural voice.

Stevo was over on the weekend...once he gets a couple of beers in him he won't shut up...parks the chair and wants to fight MMA style. He helped me with the quantum physics involved with Yamaha modification....gotta keep up with that pretty blue eBay motor in "someone's" basement...

If only I knew someone with a dyno..

RBT · **Posted:** April 14th, 2013, 11:36 am

I disagree, we DO race dynos and you cannot win without one.

DoktorC · **Posted:** April 14th, 2013, 11:59 am

RBT wrote:

I disagree, we DO race dynos and you cannot win without one.

You can in T boat lol...

Rowboat · **Joined:** April 4th, 2012, 10:08 am **Posts:** 626

I hope the ice melts soon.....it's getting nasty in this thread!!

Bench racing is always good entertainment.
Hey, just put a K&N air filter on any engine. They advertise 10% gains in hp.
Wait a minute, does anyone know where the air filter is on a drag or T boat engine....................

DoktorC · **Posted:** April 14th, 2013, 3:29 pm

Rowboat wrote:

Wait a minute, does anyone know where the air filter is on a drag or T boat engine....................

Yup....but I ain't sayin'

This isn't nasty...Hydroid still has his pants on... :mrgreen:

.

BoomerMuskoka · **Posted:** April 14th, 2013, 9:27 pm

DoktorC wrote:

Rowboat wrote:

Wait a minute, does anyone know where the air filter is on a drag or T boat engine....................

Yup....but I ain't sayin'

This isn't nasty...Hydroid still has his pants on... :mrgreen:

.

k now im going to sound new,,,, because i am,,, my excel doesnt have an air filter? does it? isnt the cowling like an airbox on a sled,,? it creates a negitive pressure.. no? im pretty sure if i could bend that way,,, i could get my hands into my carbs on the excel with the cowling on.. not much restriction. or is that just because excels are awsome :?:

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ARE YOU SMARTER THAN THE DESIGNERS WHO BUILT THE MOTOR?

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