400 hp outboard!!!! Noah's arc????

[bill mason]

Just got my Christmas present back from Noah at Eagle One. He reworked my powerhead and as his usual work, checked and repaired everything on it. When he finished he put it on the dyno---close to 400 hp at the crank!! I am here to testify, if you need anything from advise to a life jacket to a complete engine rebuild. I just haven't found a more careing, knowledgeable, professional,, plain ass nice guy to do business with than Noah at Eagle One. I put her on today and am in the process of breaking her in. Thank you so very much Noah for everything the past three years.

[sosmerc]

Hi Bill!
I've tried returning your call, but have not been able to "connect".
You asked about "adjusting" your ecu. I'll be in the shop next week. Give me a call...let's talk.
Nice to hear such positive comments about fellow members...we do have quite a community here!
Regards,
sosmerc
Steve

[bill mason]

I got your call Steve but busy as heck at work. I am going to break her in very slow before I do anything. I will get back in touch with you. Thx for reply Have a great Christmas

[stoker2001]

bill,you gonna run at red bluff drags?me and tristan will be there with our mirages

[Russ]

and what kind of engine is this? Bill, what had been done with the engine to arrive at a figure like this? What did you observe being done while dyno running when you were there watching all this? Thanks - Russ.

[bill mason]

I will be at the Red Bluff Drags this year. It is a great event and this year another friend of mine may be running his new drag Allison there. I hope to meet up with you all there. I think there were only 3 or 4 outboards there last year. I don't have a clue what this thing is going to run, last year I had the old engine dialed in pretty good. I am not going to put on the hot heads and some other stuff, just want to be close to what I was last year. I will be sure to stop by and see you. Is the darn winter over yet?? Have a great Holiday season. As far as what was done to the engine you would need to talk to Noah, he took measurments on everything and did all the testing. I am on the other side of the world in Oregon. Later

[trbocharge]

Yes, I am curious to what motor combination this is.....if 2.5 I thought that 375 or abouts hp was all she could produce without juice...

thanks

[Eagle One]

Actual horsepower on our Stuska dyno at the crankshaft was 362 @ 8300 with 31 CC heads and 391 @ 8500 with 21 CC heads. All test used 112 race fuel and an A-6 ECU @ 56psi. This engine was not entirely built by us as most of the major machine work had been done prior to us getting the engine. The work that was done was very good and whoever did the work did a very good job so we must give credit where credit is due. We found several suspect areas and corrected those to try and get Bill a decent life span on the engine. Just as with most problematic engines most of the problems were simple and just overlooked resulting in several failures. While just as many in this business, we try hard to do as good a job as possible but as with anything mechanical things can and will break and go wrong regardless of who does the work. We have tested several 300 drag engines on our dyno and have seen figures from 312 to 337 at the crank in factory form(bear in mind you lose about 10% through the gearcase). We have seen figures as high as 397 corrected horsepower with major modifications. I'm sure there are those out there making even more. As with any mechanical piece you have to give up something to get something. In this case we give up reliability for horsepower. The 2.5 merc while a great engine is at a twilight time in it's life. Larger engines are already here . We just haven't gotten involved with them to the point we have the 2.5. Newer things are coming. Horsepower readings will vary from engine to engine and from day to day as so many things vary such as fuel , temperature , barometric pressure and humidity not to mention differences in engines as well. A badly set up and tuned engine can gain as much as 15 to 20% in crankshaft horsepower simply by correcting bad tuning. Getting big horsepower is not just a modification you make it is the sum total of all you do working together. This particular engine had just about everything possible done to it to increase horsepower short of an N2O setup. Modifications done correctly will make horsepower but just as I stated earlier it will be at the expense of something else not working or lasting as well.
Eagle One

[hi strung]

just curious..who did the grinding?

[stoker2001]

kevin k here from sacrameto area,long time no talk!it will be exciting to see bill mason run with us at IHBA drags,cant wait!!!!!i am praying i can get my boat to run ten flat without naws,otherwise i have to detune and run in the eleven flat class :( tristans mirage (all white one) ran 10.14 at 96 mph with stock drag with 22 cc heads.his boat is close to a hundred pounds lighter then mine,but i think there is more there (maybe three tenths) when he switchs to XR6 case and a yamy drag prop.my drag motor is getting ported as we speak and will make 350+and i will be runnin XR6 case also.did you have the a6 ecu modified for bills motor?what were the percentages on ecu with 21cc heads?did you lean it out for the 31cc heads?thanks

[Eagle One]

Bill would have to tell you who did most of the grinding, where and what's been done before we got it to rebuild. We ran the ECU at 102 with 21 cc heads and about 100.5 or so with the 31's. This engine was surprisingly responsive. How well it will live is an educated guess with as much modification as has been done. It was just surprising to see an engine pull this hard with little adjustment. Hope it serves Bill well. As for stock Drag engines we have seen them respond very well with just an increase in compression and good fuel. 10 to 12 HP gains are common.
Eagle One

[Russ]

My guess is that if it's all high end power, that it won't make for a good Drag engine. A wide flat torque curve would be more favorable. Noah, if you ran this thing in...and plotted the corrected torque numbers you'll already know what to expect to a certain degree as a drag runner...or whether it will even have enough low end grunt to get the hull on plane. I've seen that once, was a pathetic sight! LOL Sorry Bill, don't mean to talk behind your back...just talking thats all...I do hope she runs like a banshee for you!

[RB in NM]

Bill, sounds like you have a whole herd of ponies under that Black cowel.....

the above question on who did the grinding on yer motor has raised my courisity too......do tell.. !

Never the less, sounds like a powerhouse fer sure! Congrats !

Russ

[Eagle One]

In speaking with Bill it is my understanding that this engine has been down several times and work has been done by several different parties in an effort to get it to live. I can make no guarantee if it will last now but we were impressed by the HP figures, but bear in mind this is an out and out competetion engine and as so will require much more knowledge and up keep to keep it running. What is common is most everyones work has begun to look the same. This is an indication that there is not a lot of room for improvement left and most have caught up with the available technology. Unless something comes about that almost everyone has overlooked , don't expect to see much more out of a 2.5 without major changes.
Eagle One

[Jay Smith]

The Bill Mason motor was cut and modified by JSRE over 2 years ago and was cut to be used in Pro Gas class in Drag Racing and the motor while used for that purpose was very successfull it was modified only by me the last time I saw the motor before it went to Noah. It was sold and Bill had some varing problems with the motor. Hats off to Noah for fixing the problem thats the advantage of having an in house dyno as problems can be resolved and motor can be tuned at that time , hopefully the motor gives Bill many trouble free hours of service !

[RB in NM]

Is this motor of Bill's the same one you built for Dave Hensley when he was running pro gas? If so, was this 391 horsepower the same package he was running or was there more ponies to be found at a later date?

At any rate,,, that's gobs of HP !

Russ

[Jay Smith]

Same motor , it is as it was 2 + years ago as far as the mods !