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New Pulsare 21 RECORD SPEED! 98.1 mph!!

boatman4021 said:
It is not so much the altitude
Click to expand...

I'm not a setup expert there Boatman and I'll definitively need to pick you brain for advice but altitude makes a huge difference. Try running those numbers at 5000 feet.

I'd ride my bike in the mountains of San Diego and at 1,500 feet I'd rip the front wheel off the ground coming out of the corners and the closer I got to the top of the mountain the less punch I had. If I wanted to ride a wheelie at 5,000 feet, I had to clutch it up. Huge drop in power with only a 3,500 foot elevation climb.
 
Well, I'm not sure what the other key factor is that everyone is forgetting, so I guess it will remain a secret.

My experience is high altitude does impact performance to the point that lower pitched props are required for adequate performance.
 
Invader said:
Well, I'm not sure what the other key factor is that everyone is forgetting, so I guess it will remain a secret.

My experience is high altitude does impact performance to the point that lower pitched props are required for adequate performance.
Click to expand...

I don't have any outboard exp. but I think the other big variable we are not talking about here is where the prop shaft centreline is in relation to the bottom of the hull. Having an adjustable jack plate and knowing where to start with it.

If I had a OB and was trying to tune it for speed, I'd ask a few questions on here or research a few old threads. I know the guys on here who have had good results are willing to share enough info to get you close. The rest you can work out with some effort yourself.
 
I did not say that altitude did not make a difference. What I meant was, very few of us do our boating at 5000ft. If you research this forum, I think you will find that on the average, most of us are under 2000ft. Depending on which of 2 places that I go, it is 1600ft, or 800ft. So most of us do our boating in places where these kind of speeds are possible with the right set up. As for 92 with a 250, that motor is 275+. You can argue all you want. I don't care what kind of decals you put on it. Decals don't make speed, horsepower does. So, if you want to go back to what I said in the other thread, 5mph for every 25hp, Randy is at 98, 200valeroyt is in the 93 range, and yes, I think 88 is possible with a true 250 and 82 to 84 with a well rigged 225. I will say it again, I ran 79GPS with a 200 with Boysen reeds and a Bob's tuner. That was 12 years ago. With the newer prop technology, it probably had a couple of mph waiting to be tapped.
 
Shoot..everytime I read this thread it makes me want to keep my Pulsare! If I didn't need the $$$ from the Pulsare to buy a new cockpit/cabin for my 2800SX, I'd hunt down a used 300XS, install my 14" Purple andodized Rapid Jack and also hunt down the 100MPH Pulsare speed record!!!:drool:
 
I will give up this much, the 200hp Pulsare running 79 did have a nose cone and the 225 at 79 did not. Now do you think the 225 may have had 5 or so left?
 
One thing is certain, a person on salt water at sea level has got a slight advantage over anyone that is inland and above sea level. As long as Randy is running on a cool day down there in Florida, he's got a leg up.

Go for it Randy!!!!!!:banana:
 
I have often wondered if Randy is in salt water or not. I kinda thought that he wasn't. But yes, cooler air temps do help and to be fair, my 200efi Pulsare ran the 79 at 800ft and temp was in the mid 50's. But, at Lake Murray SC, with a heat index of 112, it ran 74 on 5 1/2 cylinders and came back to WV with only 5. This is when I learned my lessen about removing the exhaust can in a 2.5L that has a plastic water pump housing!
 
One thing is for certain.....whoever buys that yellow pulsare from him, will have all the secrets...
-Craig
 
back on topic... wildman than for sharing that the triple digit goal is truely obtainable...
 
JW said:
One thing is certain, a person on salt water at sea level has got a slight advantage over anyone that is inland and above sea level. As long as Randy is running on a cool day down there in Florida, he's got a leg up.
Click to expand...

Testing was done in fresh water folks..

And yes Florida Checkmates from Randy are just faster than the rest. :poke:
No secret there....
 
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